{"id":15803,"date":"2023-01-24T19:38:01","date_gmt":"2023-01-24T14:08:01","guid":{"rendered":"https:\/\/www.interviewbit.com\/blog\/?post_type=web-story&#038;p=15803"},"modified":"2023-02-07T23:50:04","modified_gmt":"2023-02-07T18:20:04","slug":"how-to-remove-duplicates-from-array","status":"publish","type":"web-story","link":"https:\/\/www.interviewbit.com\/blog\/web-stories\/how-to-remove-duplicates-from-array\/","title":{"rendered":"How to Remove Duplicates from Array?"},"content":{"rendered":"<p><html amp=\"\" lang=\"en\"><head><meta charSet=\"utf-8\"\/><meta name=\"viewport\" content=\"width=device-width,minimum-scale=1,initial-scale=1\"\/><script async=\"\" src=\"https:\/\/cdn.ampproject.org\/v0.js\"><\/script><script async=\"\" src=\"https:\/\/cdn.ampproject.org\/v0\/amp-story-1.0.js\" custom-element=\"amp-story\"><\/script><link 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href=\"https:\/\/www.interviewbit.com\/blog\/web-stories\/how-to-remove-duplicates-from-array\/\"\/><meta name=\"web-stories-replace-head-end\"\/><\/head><body><amp-story standalone=\"\" publisher=\"InterviewBit\" publisher-logo-src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/cropped-tumblr-logo.png\" title=\"How to Remove Duplicates from Array?\" poster-portrait-src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2023\/01\/cropped-Remove-Duplicates-From-Array.png\"><amp-story-page id=\"d1e9a7c2-404d-415a-a2eb-eea40554940b\" auto-advance-after=\"7s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#0c2640\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-8713361c-f03a-487f-9a51-a0f98b9ddadb\">\n<div style=\"position:absolute;width:237.03704%;height:100%;left:-68.51852%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2048&amp;h=1536&amp;fit=max\" alt=\"geometric shape digital wallpaper\" srcSet=\"https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2048&amp;h=1536&amp;fit=max 2048w,https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1638&amp;h=1229&amp;fit=max 1638w,https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1228&amp;h=921&amp;fit=max 1228w,https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=819&amp;h=614&amp;fit=max 819w,https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=409&amp;h=307&amp;fit=max 409w,https:\/\/images.unsplash.com\/photo-1523961131990-5ea7c61b2107?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxfHxiaWclMjBkYXRhfGVufDB8fHx8MTY3MjY2MDQyNA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=255&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 107vh, 238vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" 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disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:5.33981%;top:45.63107%;width:76.69903%;height:33.81877%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6329113924050633% 0.6329113924050633% 0.6329113924050633% 0.6329113924050633% \/ 0.9569377990430622% 0.9569377990430622% 0.9569377990430622% 0.9569377990430622%\" id=\"el-95a17566-0eff-4d0a-a9a1-c1eab9f25976\">\n<h1 id=\"how-to-remove-duplicates-from-array\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.3597705696202531% 0;font-family:&quot;Roboto&quot;,sans-serif;font-size:0.809061em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #fff\">How to Remove Duplicates from Array?<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:5.58252%;top:81.06796%;width:91.26214%;height:5.66343%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5319148936170213% 0.5319148936170213% 0.5319148936170213% 0.5319148936170213% \/ 5.714285714285714% 5.714285714285714% 5.714285714285714% 5.714285714285714%\" id=\"el-cd5e9604-8a06-49c9-ac81-19784a284f87\">\n<h2 id=\"lets-dive-in\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:-0.11220079787234044% 0;font-family:&quot;Roboto&quot;,sans-serif;font-size:0.485437em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #347eff\">Let&#8217;s dive in!<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:3.8835%;top:90.7767%;width:36.16505%;height:14.23948%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-1635eb8e-c97a-4bdf-98ea-5a430567b7fd\">\n<div style=\"position:absolute;width:100%;height:127.98857%;left:0%;top:-13.99429%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/media.tenor.com\/8uSPaXIUm7UAAAAi\/arrow.gif\" alt=\"Arrow Sticker\" srcSet=\"https:\/\/media.tenor.com\/8uSPaXIUm7UAAAAi\/arrow.gif 127w,https:\/\/media.tenor.com\/8uSPaXIUm7UAAAAk\/arrow.gif 90w\" sizes=\"(min-width: 1024px) 16vh, 36vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><\/amp-story-page><amp-story-page id=\"ae40903e-5d0a-4461-bb14-d9db3bfd6b21\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script 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2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.76699%;top:34.46602%;width:85.43689%;height:40.61489%;opacity:1\">\n<div id=\"anim-5150cce3-8eec-4289-9c4d-2ef843d93a75\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-76b98008-1d5d-495a-a74d-991975b1755c\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 0.796812749003984% 0.796812749003984% 0.796812749003984% 0.796812749003984%\" id=\"el-01463911-9ace-441d-a6f8-4307552a5552\">\n<h2 id=\"duplicates-in-arrays-can-cause-confusion-and-inaccuracies-in-your-data-so-its-important-to-remove-them-but-how-lets-explore-different-methods-to-remove-duplicates-from-an\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #fff\">Duplicates in arrays can cause confusion and inaccuracies in your data so it\u2019s important to remove them. But how? &nbsp;&nbsp;&nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">Lets explore different methods to remove duplicates from an array \u2014&gt;&gt;<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">Explore now<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"89c46d12-909f-4a7b-b582-777f409a4ac2\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-87a2bf8a-fd34-4401-8b66-36c0228737b6 [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-cafdb282-96cb-4072-ac9e-acac1abf3348\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-f943fbc7-9b38-4377-8deb-3319f53600df\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-e3a3e171-d85a-4156-8710-5767a91123be\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-8ab6a0de-a668-420f-90d9-f986811fc3dc\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#f3f3f3\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-87a2bf8a-fd34-4401-8b66-36c0228737b6\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-76638dd5-e923-4c37-8934-99f03447a159\">\n<div style=\"position:absolute;width:266.31253%;height:100%;left:-83.15627%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max\" alt=\"photography of three women sits beside table inside room during daytime\" srcSet=\"https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max 6016w,https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=4812&amp;h=3212&amp;fit=max 4812w,https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=3609&amp;h=2409&amp;fit=max 3609w,https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2406&amp;h=1606&amp;fit=max 2406w,https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1203&amp;h=803&amp;fit=max 1203w,https:\/\/images.unsplash.com\/photo-1573164574397-dd250bc8a598?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw3OHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjcwMzM2Mjk2&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=227&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 120vh, 267vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-90701d05-70b8-48ba-9066-72199e99b3ce\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.28155%;top:35.11327%;width:85.43689%;height:35.76052%;opacity:1\">\n<div id=\"anim-cafdb282-96cb-4072-ac9e-acac1abf3348\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-f943fbc7-9b38-4377-8deb-3319f53600df\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 0.904977375565611% 0.904977375565611% 0.904977375565611% 0.904977375565611%\" id=\"el-beb9cd08-b670-4372-bebb-c5ab5af8e430\">\n<h2 id=\"given-an-array-of-integers-the-task-is-to-remove-duplicates-from-the-array-for-example-if-given-input-is-arr-1-2-2-3-4-4-4-5-5-then-resulting-array-after-reomoving-duplicates-s\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #fff\">Given an array of integers, the task is to remove duplicates from the array. For example, if given input &nbsp;is arr[] = {1, 2, 2, 3, 4, 4, 4, 5, 5}, then resulting array after reomoving duplicates should be arr[] = {1, 2, 3, 4, 5}.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:0;top:4.69256%;width:99.51456%;height:11.65049%;opacity:1\">\n<div id=\"anim-e3a3e171-d85a-4156-8710-5767a91123be\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-8ab6a0de-a668-420f-90d9-f986811fc3dc\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.4878048780487805% 0.4878048780487805% 0.4878048780487805% 0.4878048780487805% \/ 2.7777777777777777% 2.7777777777777777% 2.7777777777777777% 2.7777777777777777%;background-clip:content-box;background-color:#052258\" id=\"el-474ddcc5-f7c3-4dc9-a20c-3f6b657b137f\">\n<h1 id=\"problem-statement\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:2.613658536585366% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.760518em;line-height:0.9;text-align:center;padding:0.975609756097561% 1.951219512195122%;color:#000000\"><span><span style=\"font-weight: 700; color: #3372e0\">Problem Statement<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">Check more examples<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"de3e1538-90d1-44c3-9dc1-e9eb15aea441\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-bbd77a50-4bcf-4ea0-8116-b66820ea2e93\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-a80af978-bfd5-4c73-ada4-fb65ffa8f451\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-b1cd6e10-c19d-410c-9310-2fba157066f7 [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-00c39bac-936a-4966-9a34-e0255c6237d1\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-553ac501-9c45-4af9-8f09-9822eee4a5bb\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#d9d9d9\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-b1cd6e10-c19d-410c-9310-2fba157066f7\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-76638dd5-e923-4c37-8934-99f03447a159\">\n<div style=\"position:absolute;width:266.31253%;height:100%;left:-83.15627%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max\" alt=\"photography of people inside room during daytime\" srcSet=\"https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max 6016w,https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=4812&amp;h=3212&amp;fit=max 4812w,https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=3609&amp;h=2409&amp;fit=max 3609w,https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2406&amp;h=1606&amp;fit=max 2406w,https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1203&amp;h=803&amp;fit=max 1203w,https:\/\/images.unsplash.com\/photo-1573164574511-73c773193279?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxMDh8fHNvZnR3YXJlJTIwZGV2ZWxvcGVyfGVufDB8fHx8MTY3MDMzNjMzMA&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=227&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 120vh, 267vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-ca607fc3-47ce-46f2-be0f-336346011aab\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:8.73786%;top:32.68608%;width:82.76699%;height:50.32362%;opacity:1\">\n<div id=\"anim-bbd77a50-4bcf-4ea0-8116-b66820ea2e93\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-a80af978-bfd5-4c73-ada4-fb65ffa8f451\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5865102639296188% 0.5865102639296188% 0.5865102639296188% 0.5865102639296188% \/ 0.6430868167202572% 0.6430868167202572% 0.6430868167202572% 0.6430868167202572%\" id=\"el-91e1f96d-98c1-4640-bbd8-2ceb2f611100\">\n<h2 id=\"intuition-sorting-will-group-duplicate-elements-together-making-it-easier-to-identify-and-remove-them-input-array-1-2-3-2-2-3-4-sorted-array-1-2-2-2-3-3-4-now-its-easy-to-spot\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.565982404692082% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #fff\">Intuition: Sorting will group duplicate elements together making it easier to identify and remove them. &nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">Input array: 1 2 3 2 2 3 4 Sorted array: 1 2 2 2 3 3 4&nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">Now, it&#8217;s easy to spot and remove the duplicates.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:0;top:4.69256%;width:99.51456%;height:18.4466%;opacity:1\">\n<div id=\"anim-00c39bac-936a-4966-9a34-e0255c6237d1\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-553ac501-9c45-4af9-8f09-9822eee4a5bb\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.4878048780487805% 0.4878048780487805% 0.4878048780487805% 0.4878048780487805% \/ 1.7543859649122806% 1.7543859649122806% 1.7543859649122806% 1.7543859649122806%;background-clip:content-box;background-color:#052258\" id=\"el-9b799116-f7f3-4f88-aafc-d52d5a3ec37c\">\n<h1 id=\"approach-1-using-sorting\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:2.613658536585366% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.760518em;line-height:0.9;text-align:center;padding:0.975609756097561% 1.951219512195122%;color:#000000\"><span><span style=\"font-weight: 700; color: #3372e0\">Approach \u2013 1&nbsp;<\/span><br \/>\n<span style=\"font-weight: 700; color: #3372e0\">(Using Sorting)<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">Explore now<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"9e5d6a53-c17c-415a-b590-e6df6d6fd3f4\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-df2ff30e-dcec-446e-8915-23eca0f4a0ea [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-22085091-01ca-4224-a0e2-0e0b4451a3eb\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-8bd2e241-245b-4cf8-bd21-9fb035376b0b\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#f3a673\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-df2ff30e-dcec-446e-8915-23eca0f4a0ea\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-27f2951c-8b6e-4772-8cc9-8a5b431fd5c6\">\n<div style=\"position:absolute;width:266.31253%;height:100%;left:-83.15627%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max\" alt=\"people sitting beside rectangular brown table with laptops\" srcSet=\"https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max 6016w,https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=4812&amp;h=3212&amp;fit=max 4812w,https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=3609&amp;h=2409&amp;fit=max 3609w,https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2406&amp;h=1606&amp;fit=max 2406w,https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1203&amp;h=803&amp;fit=max 1203w,https:\/\/images.unsplash.com\/photo-1573165759995-5865a394a1aa?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw2M3x8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjY5OTAyNjU0&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=227&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 120vh, 267vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-f24b57dc-e5b9-416a-be22-4a071ebd4794\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.28155%;top:29.28803%;width:85.43689%;height:55.17799%;opacity:1\">\n<div id=\"anim-22085091-01ca-4224-a0e2-0e0b4451a3eb\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-8bd2e241-245b-4cf8-bd21-9fb035376b0b\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 0.5865102639296188% 0.5865102639296188% 0.5865102639296188% 0.5865102639296188%\" id=\"el-9cdf83be-84a7-4e37-9e13-228230d7f1b6\">\n<h2 id=\"solution-1-using-extra-space-1-sort-the-given-array-2-use-an-auxiliary-array-to-store-unique-elements-and-maintain-their-count-3-copy-the-unique-elements-back-to-the-or\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #347eff\">Solution 1 &#8211; Using extra space<\/span><span style=\"color: #fff\"> &nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">1. Sort the given array.&nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">2. Use an auxiliary array to store unique elements and maintain their count.&nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">3. Copy the unique elements back to the original array.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">See code implementation<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"cf434d3e-3132-4b3c-87e0-5ae80860d37a\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-9a18d038-298b-4054-8585-ad42089a47af [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-f883425a-3e34-44bf-befa-f336e2fd57b1\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-a682cdc1-f848-412a-bacc-398997310607\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#262626\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-9a18d038-298b-4054-8585-ad42089a47af\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-4bea2dab-2033-49a6-a9a8-b6dc345abb9c\">\n<div style=\"position:absolute;width:266.31253%;height:100%;left:-83.15627%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1573165706511-3ffde6ef1fe3?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwxM3x8c29mdHdhcmUlMjBkZXZlbG9wZXJzfGVufDB8fHx8MTY3MjkyMDQ4OQ&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=6016&amp;h=4016&amp;fit=max\" alt=\"three women sitting beside wooden table\" 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style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-2ad5ac42-0aab-4934-a886-dd828e311d1a\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.52427%;top:29.28803%;width:85.43689%;height:60.03236%;opacity:1\">\n<div id=\"anim-f883425a-3e34-44bf-befa-f336e2fd57b1\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-a682cdc1-f848-412a-bacc-398997310607\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 0.5390835579514826% 0.5390835579514826% 0.5390835579514826% 0.5390835579514826%\" id=\"el-10752c12-70a7-4a16-8ef9-0e5287245dc9\">\n<h2 id=\"solution-2-without-using-extra-space-1-sort-the-given-array-2-use-an-in-place-swapping-approach-3-use-an-integer-variable-to-keep-track-of-unique-elements-their-positio\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #347eff\">Solution 2 &#8211; Without using extra space &nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">1. Sort the given array.&nbsp;<\/span><\/p>\n<p><span style=\"color: #fff\">2. Use an in-place swapping approach.<\/span><\/p>\n<p><span style=\"color: #fff\">3. Use an integer variable to keep track of unique elements &amp; their position in the same array.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">See code implementation<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"015ce16c-01eb-4503-a5fd-c69fd2ace5d2\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-425bd1cd-7363-4c34-8819-0ba4622e2195\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-c2f806f7-de39-4077-9959-b496c574169d\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-427d1c78-5589-4668-a4ef-fbdbc2ef1f9d [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#a6c0c0\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-427d1c78-5589-4668-a4ef-fbdbc2ef1f9d\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-07cb1230-628a-4b45-910c-b13bf7f662ea\">\n<div style=\"position:absolute;width:133.38261%;height:100%;left:-16.6913%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2707&amp;h=3608&amp;fit=max\" alt=\"man in blue hoodie looking at macbook\" srcSet=\"https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2707&amp;h=3608&amp;fit=max 2707w,https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2165&amp;h=2886&amp;fit=max 2165w,https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1624&amp;h=2165&amp;fit=max 1624w,https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1082&amp;h=1442&amp;fit=max 1082w,https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=541&amp;h=721&amp;fit=max 541w,https:\/\/images.unsplash.com\/photo-1582138825658-fb952c08b282?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw0NHx8amF2YSUyMGRldmVsb3BlcnxlbnwwfHx8fDE2NzMwMDg0NzY&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=453&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 60vh, 134vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-ddd85b20-5151-46db-b5aa-6c37b1273284\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.28155%;top:36.40777%;width:85.43689%;height:26.05178%;opacity:1\">\n<div id=\"anim-425bd1cd-7363-4c34-8819-0ba4622e2195\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-c2f806f7-de39-4077-9959-b496c574169d\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 1.2422360248447204% 1.2422360248447204% 1.2422360248447204% 1.2422360248447204%\" id=\"el-5a80f896-83ce-48d0-b555-413c716f09c1\">\n<h2 id=\"time-complexity-onlogn-because-we-have-used-sorting-space-complexity-on-using-an-extra-array\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #347eff\">Time complexity: <\/span><span style=\"color: #fff\">O(NlogN) because we have used sorting.<\/span><\/p>\n<p><span style=\"font-weight: 700; color: #347eff\">Space complexity:<\/span><span style=\"color: #fff\"> O(N) using an extra array.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">Explore more<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"8df77031-9e15-4779-a2a9-fe68c9e86633\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-68c1c6e9-b5ac-481e-bde9-7b26762108a3\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-d0fe64a5-caf8-4d25-acc8-df7cac5c4313\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-74c82206-0f5f-465a-8244-2bd6dd208e2b [data-leaf-element=\\\"true\\\"]\",\"keyframes\":{\"transform\":[\"translate(0%, 0%) scale(1.5)\",\"translate(0%, 0%) scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-98d408df-07eb-4b4e-95cc-9033290e3dc9\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"both\"}]<\/script><\/amp-story-animation><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-bfdcba0a-8fb6-47d5-933b-608651ca6c97\",\"keyframes\":{\"transform\":[\"scale(0.3333333333333333)\",\"scale(1)\"]},\"delay\":0,\"duration\":2000,\"easing\":\"cubic-bezier(.3,0,.55,1)\",\"fill\":\"forwards\"}]<\/script><\/amp-story-animation><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#f3f3f3\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div id=\"anim-74c82206-0f5f-465a-8244-2bd6dd208e2b\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-abc994fd-18e5-4821-9439-6a805f711046\">\n<div style=\"position:absolute;width:118.67612%;height:100%;left:-9.33806%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=4016&amp;h=6016&amp;fit=max\" alt=\"shallow focus photo of woman using gray laptop computer\" srcSet=\"https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=4016&amp;h=6016&amp;fit=max 4016w,https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=3212&amp;h=4812&amp;fit=max 3212w,https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=2409&amp;h=3609&amp;fit=max 2409w,https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=1606&amp;h=2406&amp;fit=max 1606w,https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=803&amp;h=1203&amp;fit=max 803w,https:\/\/images.unsplash.com\/photo-1573495627094-cbfef909a47b?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHw4MHx8c29mdHdhcmUlMjBkZXZlbG9wZXJ8ZW58MHx8fHwxNjczNDQzODM1&amp;ixlib=rb-4.0.3&amp;fm=jpg&amp;w=340&amp;h=509&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 53vh, 119vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-0a76cce9-5584-441b-bdfc-8adb40d0cc18\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:8.98058%;top:38.1877%;width:83.00971%;height:40.61489%;opacity:1\">\n<div id=\"anim-68c1c6e9-b5ac-481e-bde9-7b26762108a3\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-d0fe64a5-caf8-4d25-acc8-df7cac5c4313\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5847953216374269% 0.5847953216374269% 0.5847953216374269% 0.5847953216374269% \/ 0.796812749003984% 0.796812749003984% 0.796812749003984% 0.796812749003984%\" id=\"el-68dc11dc-e204-44c0-b174-4c7e4f8d8ead\">\n<h2 id=\"here-well-hashmap-lookup-to-check-for-duplicate-elements-while-traversing-traverse-the-array-store-elements-in-a-hashmap-while-traversing-place-unique-elements-by-checking-if-they-are\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5614035087719298% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #fff\">Here, we&#8217;ll HashMap lookup to check for duplicate elements while traversing. Traverse the array &amp; store elements in a HashMap. While traversing, place unique elements by checking if they are already present in HashMap.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:0;top:4.69256%;width:99.51456%;height:18.4466%;opacity:1\">\n<div id=\"anim-98d408df-07eb-4b4e-95cc-9033290e3dc9\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-bfdcba0a-8fb6-47d5-933b-608651ca6c97\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.4878048780487805% 0.4878048780487805% 0.4878048780487805% 0.4878048780487805% \/ 1.7543859649122806% 1.7543859649122806% 1.7543859649122806% 1.7543859649122806%;background-clip:content-box;background-color:#052258\" id=\"el-c443c2c6-2783-4348-9cb4-4ac952ad3b88\">\n<h1 id=\"approach-2-using-hashmaps\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:2.613658536585366% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.760518em;line-height:0.9;text-align:center;padding:0.975609756097561% 1.951219512195122%;color:#000000\"><span><span style=\"font-weight: 700; color: #3372e0\">Approach \u2013 2&nbsp;<\/span><br \/>\n<span style=\"font-weight: 700; color: #3372e0\">(Using HashMaps)<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a 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1600w,https:\/\/images.unsplash.com\/photo-1631624210938-539575f92e3c?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwyNHx8c29mdHdhcmUlMjBkZXZlbG9wbWVudHxlbnwwfHx8fDE2NjYwMDQwNzM&amp;ixlib=rb-1.2.1&amp;fm=jpg&amp;w=800&amp;h=1200&amp;fit=max 800w,https:\/\/images.unsplash.com\/photo-1631624210938-539575f92e3c?ixid=MnwxMzcxOTN8MHwxfHNlYXJjaHwyNHx8c29mdHdhcmUlMjBkZXZlbG9wbWVudHxlbnwwfHx8fDE2NjYwMDQwNzM&amp;ixlib=rb-1.2.1&amp;fm=jpg&amp;w=340&amp;h=510&amp;fit=max 340w\" sizes=\"(min-width: 1024px) 53vh, 119vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<div class=\"element-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page-background-overlay-area\" style=\"background-color:rgba(0,0,0,0.5)\"><\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-6.31068%;width:43.68932%;height:9.70874%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-714d4b27-56b9-4059-86b7-f96b9aebf636\">\n<div style=\"position:absolute;width:100.28251%;height:100%;left:-0.14125%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png\" alt=\"InterviewBit-White-2\" srcSet=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2.png 2130w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-2048x681.png 2048w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1536x511.png 1536w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-1024x340.png 1024w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-768x255.png 768w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-300x100.png 300w,https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/07\/InterviewBit-White-2-150x50.png 150w\" sizes=\"(min-width: 1024px) 20vh, 44vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.28155%;top:41.58576%;width:85.43689%;height:26.05178%;opacity:1\">\n<div id=\"anim-c1e6d7c9-24b0-4da9-b64d-b05c23e4fffa\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-01aceab8-cc0f-4a59-85c9-5fb920a70072\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:scale(0.3333333333333333)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 1.2422360248447204% 1.2422360248447204% 1.2422360248447204% 1.2422360248447204%\" id=\"el-9e7f24fa-f710-4cd5-96c0-5fca546c5906\">\n<h2 id=\"time-complexity-on-because-of-the-use-of-hashmaps-space-complexity-on-using-a-hashmap\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5170454545454544% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #347eff\">Time complexity: <\/span><span style=\"color: #fff\">O(N) because of the use of hashmaps.<\/span><\/p>\n<p><span style=\"font-weight: 700; color: #347eff\">Space complexity:<\/span><span style=\"color: #fff\"> O(N) using a hashmap.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">Explore more<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"936b559d-4dc0-423a-9d89-b4d4ba99b081\" auto-advance-after=\"7s\"><amp-story-animation layout=\"nodisplay\" trigger=\"visibility\"><script type=\"application\/json\">[{\"selector\":\"#anim-62d5567b-10be-4818-94b3-42d8d0157a65\",\"keyframes\":{\"opacity\":[0,1]},\"delay\":0,\"duration\":1000,\"easing\":\"cubic-bezier(0.2, 0.6, 0.0, 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id=\"anim-9c70ab0d-bda9-4f9a-b3b5-9654eec8ced3\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:translate3d(-112.4161%, 0px, 0)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" id=\"el-3842812c-d804-48f9-b479-cbae6e5ee4fe\">\n<h2 id=\"want-to-explore-these-approaches-and-learn-how-to-implement-them-in-various-programming-languages\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.6395763422818794% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.517799em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #faf4ea\">Want to explore these approaches and learn how to implement them in various programming languages?<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:8.00971%;top:77.6699%;width:85.43689%;height:11.97411%;opacity:1\">\n<div id=\"anim-a7c64408-b33f-4aa7-8dd4-e097644f90f3\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:0;--initial-transform:none\">\n<div id=\"anim-e3171758-64c6-4771-8b78-90094d8facf0\" class=\"animation-wrapper\" style=\"width:100%;height:100%;display:block;position:absolute;top:0;left:0;--initial-opacity:1;--initial-transform:translate3d(-109.375%, 0px, 0)\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 2.7027027027027026% 2.7027027027027026% 2.7027027027027026% 2.7027027027027026%\" id=\"el-faf98ac9-3bde-42ce-ba57-b4ed553c9aaf\">\n<h2 id=\"click-on-the-link-below-to-start-your-journey\" class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.0909090909090908% 0;font-family:&quot;Darker Grotesque&quot;,sans-serif;font-size:0.485437em;line-height:1.1;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #347eff\">Click on the link below to start your journey.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\" cta-image=\"https:\/\/www.interviewbit.com\/blog\/wp-content\/uploads\/2021\/10\/Banner-13.png\"><a href=\"https:\/\/www.interviewbit.com\/blog\/remove-duplicates-from-array\/?utm_source=Ib&amp;utm_medium=webstories&amp;utm_campaign=remove-duplicates-from-array\" rel=\"\">SWIPE UP<\/a><\/amp-story-page-outlink><\/amp-story-page><\/amp-story><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"In this web story, we will show you how to  remove duplicates from array. Also, how to implement this in different programming 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