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添加（0047.全排列II.md）：增加typescript版本

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Steve2020
2022-04-02 23:34:25 +08:00
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problems/0047.全排列II.md
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@ -292,6 +292,34 @@ var permuteUnique = function (nums) {
```
### TypeScript
```typescript
function permuteUnique(nums: number[]): number[][] {
nums.sort((a, b) => a - b);
const resArr: number[][] = [];
const usedArr: boolean[] = new Array(nums.length).fill(false);
backTracking(nums, []);
return resArr;
function backTracking(nums: number[], route: number[]): void {
if (route.length === nums.length) {
resArr.push(route.slice());
return;
}
for (let i = 0, length = nums.length; i < length; i++) {
if (i > 0 && nums[i] === nums[i - 1] && usedArr[i - 1] === false) continue;
if (usedArr[i] === false) {
route.push(nums[i]);
usedArr[i] = true;
backTracking(nums, route);
usedArr[i] = false;
route.pop();
}
}
}
};
```
### Swift
```swift