题目信息 Given two stringsneedleandhaystack, return the index of the first occurrence ofneedleinhaystack, or-1ifneedleis not part ofhaystack. 给定两个字符串 needle 和 haystack,返回 needle 在 haystack 中第一次出现的索引,如果 needle 不是 haystack 的一部分,则返回-1。 Input: haystack = "sadbut...
Return the index of the first occurrence of needle in haystack, or-1ifneedleis not part ofhaystack. Clarification: What should we return whenneedleis an empty string? This is a great question to ask during an interview. For the purpose of this problem, we will return 0 whenneedleis an e...
The first occurrence is at index 0, so we return 0. Example 2: Input:haystack = "leetcode", needle = "leeto"Output:-1Explanation:"leeto" did not occur in "leetcode", so we return -1. Constraints: 1 <= haystack.length, needle.length <= 104 haystackandneedleconsist of only lowercas...
LeetCode28. Find the Index of the First Occurrence in a String CacheL1ne 来自专栏 · Leetcode刷题笔记 解题思路 二重循环,没什么特别的 class Solution { public: int strStr(string haystack, string needle) { int index = 0; bool flag = true; for(int i = 0; i < haystack.size(); i+...
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.impl Solution { pub fn str_str(haystack: String, needle: String) -> i32 { let hlen = haystack.len(); let nle
String str1 ="Learn Java";intresult;// getting index of character 'J'result = str1.indexOf('J'); System.out.println(result);// 6// the first occurrence of 'a' is returnedresult = str1.indexOf('a'); System.out.println(result);// 2// character not in the stringresult = str1...
1.String.indexOf()API TheString.indexOf()in Java returns the index location of a specified character or string. TheindexOf()method is an overloaded method and accepts two arguments: substringorch: the substring that needs to be located in the current string. ...
int indexOf(String str, int fromIndex) It returns the index of thefirst occurrenceof the specifiedsubstring, starting at thespecified indexwithin this string. Example publicclassStringIndexOfExample{ publicstaticvoidmain(String[]args){ Stringstr="javainsimpleway"; ...
String.IndexOf Method Reference Feedback Definition Namespace: Java.Lang Assembly: Mono.Android.dll Overloads IndexOf(Int32) Returns the index within this string of the first occurrence of the specified character. IndexOf(String) Returns the index within this string of the first occurrence of th...
2.indexOf()源码 /** Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index. 返回这个字符串从指定的下标开始,指定字符在这个字符串中第一次出现的索引。 If a character with value ch occurs in the ...