- LeetCodeleetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/description/ 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++) { ...
classSolution{public:intstrStr(string haystack, string needle){/* find the first needle in haystack */intret =-1, pos =0;intneedle_len = needle.size();//bool sign = false;for(inti =0; i < haystack.size(); ++i){if(haystack[i] == needle[pos]){if(pos == needle_len -1)return...
code力扣 20. ValidParentheses 有效的括号(python版解析) 少女马曰曰 0 code力扣4. Medianof Two Sorted Arrays 寻找两个正序数组的中位数(python版解析) 少女马曰曰 0 被子弹击中,只剩下了最后十五秒来找出凶手 卷卷电影Tv 1365 4 code力扣25. ReverseNodes in k-Group K 个一组...
Given two stringsneedleandhaystack, return the index of the first occurrence ofneedleinhaystack, or-1ifneedleis not part ofhaystack. implSolution{pubfnstr_str(haystack:String,needle:String)->i32{lethlen=haystack.len();letnlen=needle.len();ifhlen<nlen{return-1;}foriin0..=(hlen-nlen){if&...
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 ...
Find the Index of the First Occurrence in a String 在字符串中找到目标字符第一次出现的索引 Kyle 计算机,暂时的神。解决方案 class Solution { public int strStr(String haystack, String needle) { int hayIndex = 0; int neeIndex = 0; boolean ing = false; if (haystack.length()<needle.length(...
* @return the index of the first occurrence of the specified substring, * or {@code -1} if there is no such occurrence. */public intindexOf(String str){returnindexOf(str,0);} 首先光标在这一层的indexOf()方法上面,里面有一个参数str,上面有解释the substring to search for。意思说这就是...
@@ -74,4 +74,38 @@ public static int lengthOfLastWord(String s) { }/** * <h4></><a href="https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/">Find the Index of the First Occurrence in a String</a></h4> ...
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首先我们先来看一下indexOf的源码,indexOf的使用方式比较多,这是我们以一个形参的为例。 代码语言:javascript 复制 staticString mainString="Hello my name is HuangLinqing";staticString patternString="HuangLinqing";publicstaticvoidmain(String[]args){System.out.printf(mainString.indexOf(patternString,0)+""...