javaScript --- 如何生成新数组

    科技2022-07-17  101

    方法一:Array.of

    let arr = '1,2,3,4,5' // Array.of 等于 Array.prototype.of let array = Array.of(1,2,3,4,5); console.log(array);// [1,2,3,4,5]

    方法二:new Array

    let array = new Array(5); array[0] = 1; array[1] = 2; array[2] = 3; array[3] = 4; array[4] = 5; console.log(array);// [1,2,3,4,5]

    方法三:字面量

    let array = [1,2,3,4,5]; console.log(array);// [1,2,3,4,5]

    方法四:Array.fill

    //Array.fill(value, start, end) // value 填充值 start 填充开始位置 end填充结束位置 let array = new Array(5).fill(1); console.log(array);// [1,1,1,1,1] //还可以用来替换数组 let arr2 = [1,2,3,4,5] console.log(arr2.fill(8,2,4))// [1, 2, 8, 8, 5]
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