[js]不使用loop，创建一个长度为100的数组

[VaJoy]

不使用loop循环，创建一个长度为100的数组，并且每个元素的值等于它的下标

从某站看到的一道淘宝笔试题，挺有趣的，大家有兴趣可以做一做
😄 建议自行完成哦别搜索，不然就直接找到答案了

[mumuy]

var arr = new Array(100);
arr = arr.map(function(item, index) {
return index;
});

[VaJoy]

@mumuy 恭喜中陷阱，你可以在浏览器运行下哦，会得到一个元素全是undefined的数组 😄

[chengnuo]

用递归

[yuersmall]

看来我确实弱爆了

[tianzi77]

Array(100).join(",").split(",").map(function(key,index){return index;})

[VaJoy]

收集下A神的：

Array.apply(null, {length: 10}).map(Number.call, Number) 

我改一下：

Object.keys(Array.apply(null, {length: 10}))

[Cxiaohuiyang]

``Array.from({length:100} , function(value, index){ return index })

[Keith-CY]

var arr = Array.from({length:100}, (v,k) => k);
arr
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]

[sevenCon]

Object.keys(Array(100).toString().split(","))

[anilpixel]

var list = [];

(function next(i) {
  if (i < 100) {
    list.push(i);
    next(++i);
  }
}(0));

[Yoomin233]

function genArr(i, arr){
    if(i < 10){
        arr[i] = i++
        return genArr(i, arr);
    } else {
        return arr;
    }
}
var arr = genArr(0, [])

[shaonq]

var a =[],b= function () { return a.length<100?(a.push(a.length)&&arguments.callee()):a }(); console.log(a,b);

[kylewh]

[...Array(10).keys()]