题解 | #创建数组#
创建数组
https://www.nowcoder.com/practice/04a6204cd4cf42dd8983c000110ada7e
<!DOCTYPE html><html><head><meta charset=utf-8></head><body>
<script type="text/javascript">
const _createArray = (number) => {
// 补全代码
//方法1
//实例化数组对象，得到number个空值数组
/*let arr = new Array(number);
//填充数组里面的空值，将每个空值赋值为number
let newArr = arr.fill(number);
//返回新得到的数组newArr
return newArr;*/
//方法2
//() => number 将数组中每个值赋值为number
//Array.from({length: 4}, () => 4);
//Array(4) [ 4, 4, 4, 4 ]
//{length: number} 表明一个数组
//Array.from(数组对象,回调函数)
//遍历每个数组元素，每个元素调用函数
return Array.from({length: number}, () => number);
}
</script>
</body>
</html>
