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docs: 同步第28题到 leetcoder.net 的原始内容

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- 28-find-the-index-of-the-first-occurrence-in-a-string.md

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`‎zh/1-1000/28-find-the-index-of-the-first-occurrence-in-a-string.md`

Lines changed: 37 additions & 6 deletions

Original file line number	Diff line number	Diff line change
`@@ -38,16 +38,21 @@`
`38`	`38`	`- 本题直接看答案比较容易理解。`
`39`	`39`
`40`	`40`	`##复杂度`
`41`		-* 时间：`O(m* n)`。
	`41`	+* 时间：`O(m+ n)`。
`42`	`42`	* 空间：`O(n)`。
`43`	`43`
`44`	`44`	`##Python`
`45`	`45`	```python
`46`	`46`	`classSolution:`
`47`	`47`	`defstrStr(self,haystack:str,needle:str) ->int:`
`48`	`48`	`for iinrange(len(haystack)):`
`49`		`-if haystack[i:i+len(needle)]== needle:`
`50`		`-return i`
	`49`	`+ j=0`
	`50`	`+`
	`51`	`+while i+ j<len(haystack)and haystack[i+ j]== needle[j]:`
	`52`	`+ j+=1`
	`53`	`+`
	`54`	`+if j==len(needle):`
	`55`	`+return i`
`51`	`56`
`52`	`57`	`return-1`
`53`	`58`	```
`@@ -56,8 +61,14 @@ class Solution:`
`56`	`61`	```javascript
`57`	`62`	`varstrStr=function (haystack,needle) {`
`58`	`63`	`for (let i=0; i<haystack.length; i++) {`
`59`		`-if (haystack.slice(i, i+needle.length)== needle) {`
`60`		`-return i`
	`64`	`+let j=0`
	`65`	`+`
	`66`	`+while (i+ j<haystack.length&& haystack[i+ j]== needle[j]) {`
	`67`	`+ j+=1`
	`68`	`+`
	`69`	`+if (j==needle.length) {`
	`70`	`+return i`
	`71`	`+ }`
`61`	`72`	`}`
`62`	`73`	`}`
`63`	`74`
`@@ -90,7 +101,27 @@ var strStr = function (haystack, needle) {`
`90`	`101`	`# Welcome to create a PR to complete the code of this language, thanks!`
`91`	`102`	```
`92`	`103`
`93`		`-##C, Kotlin, Swift, Rust or other languages`
	`104`	`+##C`
	`105`	+```c
	`106`	`+// Welcome to create a PR to complete the code of this language, thanks!`
	`107`	+```
	`108`	`+`
	`109`	`+##Kotlin`
	`110`	+```kotlin
	`111`	`+// Welcome to create a PR to complete the code of this language, thanks!`
	`112`	+```
	`113`	`+`
	`114`	`+##Swift`
	`115`	+```swift
	`116`	`+// Welcome to create a PR to complete the code of this language, thanks!`
	`117`	+```
	`118`	`+`
	`119`	`+##Rust`
	`120`	+```rust
	`121`	`+// Welcome to create a PR to complete the code of this language, thanks!`
	`122`	+```
	`123`	`+`
	`124`	`+##Other languages`
`94`	`125`	```
`95`	`126`	`// Welcome to create a PR to complete the code of this language, thanks!`
`96`	`127`	```

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