Pattern Search Algorithm- KMP
A Quick Overview
Pattern Searching algorithms, also known as String Matching algorithms, are very useful when searching for a string within another string.
Introduction to Pattern Search Algorithm
Given a text str[0..n-1] and a pattern pat[0..m-1], write a program with a function PatternSearch(char pat, char str) that prints all occurrences of pat in str. Given that n > m.
Check out example
1. Iterate over string for i from 0 to n – 1 (n = string size).
2. For every value of i, slide pattern over text one by one & check for match.
3. If there’s match, slide by 1 to check for subsequent matches.
Check its implementation
Time Complexity (Best Case):
Time Complexity (Worst Case):
KMP utilizes the deteriorating property and further reduces the running time complexity of the most pessimistic scenario to O(n).
KMP Pattern Searching
Time Complexity (Worst case):
O(n) where n is length of text.
O(m) where m is the size of pattern.
How to implement this approach in different programming languages?
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