28. Find the Index of the First Occurrence in a String
Easy
10 Points
Two Pointers
String
String Matching
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.
Examples
Example 1
Input: haystack = "sadbutsad", needle = "sad"
Output: 0
Explanation: "sad" occurs at index 0 and 6.
The first occurrence is at index 0, so we return 0.
Example 2
Input: haystack = "leetcode", needle = "leeto"
Output: -1
Explanation: "leeto" did not occur in "leetcode", so we return -1.
Constraints
1 <= haystack.length, needle.length <= 104
haystack and needle consist of only lowercase English characters.
28. Find the Index of the First Occurrence in a String
Easy
10 Points
Two Pointers
String
String Matching
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.
Examples
Example 1
Input: haystack = "sadbutsad", needle = "sad"
Output: 0
Explanation: "sad" occurs at index 0 and 6.
The first occurrence is at index 0, so we return 0.
Example 2
Input: haystack = "leetcode", needle = "leeto"
Output: -1
Explanation: "leeto" did not occur in "leetcode", so we return -1.
Constraints
1 <= haystack.length, needle.length <= 104
haystack and needle consist of only lowercase English characters.
Find the Index of the First Occurrence in a String - Practice Coding | SlaveCode