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Merge pull request #1187 from xiaofei-2020/back10
添加(0093.复原IP地址.md):增加typescript版本
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@ -455,6 +455,45 @@ var restoreIpAddresses = function(s) {
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};
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};
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```
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```
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## TypeScript
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```typescript
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function isValidIpSegment(str: string): boolean {
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let resBool: boolean = true;
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let tempVal: number = Number(str);
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if (
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str.length === 0 || isNaN(tempVal) ||
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tempVal > 255 || tempVal < 0 ||
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(str.length > 1 && str[0] === '0')
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) {
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resBool = false;
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}
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return resBool;
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}
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function restoreIpAddresses(s: string): string[] {
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const resArr: string[] = [];
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backTracking(s, 0, []);
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return resArr;
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function backTracking(s: string, startIndex: number, route: string[]): void {
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let length: number = s.length;
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if (route.length === 4 && startIndex >= length) {
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resArr.push(route.join('.'));
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return;
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}
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if (route.length === 4 || startIndex >= length) return;
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let tempStr: string = '';
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for (let i = startIndex + 1; i <= Math.min(length, startIndex + 3); i++) {
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tempStr = s.slice(startIndex, i);
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if (isValidIpSegment(tempStr)) {
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route.push(s.slice(startIndex, i));
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backTracking(s, i, route);
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route.pop();
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}
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}
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}
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};
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```
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## Go
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## Go
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回溯(对于前导 0的IP(特别注意s[startIndex]=='0'的判断,不应该写成s[startIndex]==0,因为s截取出来不是数字))
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回溯(对于前导 0的IP(特别注意s[startIndex]=='0'的判断,不应该写成s[startIndex]==0,因为s截取出来不是数字))
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