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Copy an Array with the Spread Operator | 使用Spread Operator复制数组 |
使用Spread Operator复制数组
- 示例中的最后一个提示告诉您使用最近学习的方法。
- spread运算符将所有元素复制到一个新的空对象中。
```的JavaScript while(num> = 1){ newArr = [... arr] num--; }
- The code above will copy all of the elements into `newArr` but will also reinitialise `newArr` with every new iteration of the while loop.
- A new variable should first be initialised using the spread operator - `let obj = [...arr];` - then this variable should be added to the `newArr` for every iteration of the while loop.
## Solution:
JavaScript的 function copyMachine(arr,num){ 让newArr = []; while(num> = 1){ //更改此行下方的代码 newArr.push([... ARR]); //更改此行以上的代码 num--; } 返回newArr; }
//在此处更改代码以测试不同的情况: console.log(copyMachine([true,false,true],2)); ```