[LeetCode] 28. Implement strStr()

[LeetCode] 28. Implement strStr()

28. Implement strStr() Easy Implement strStr(). Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Clarification: What should we return when needle is an empty string? This is a great question to ask during an interview. For the purpose of this problem, we will return 0 when needle is an empty string. Th..