javascript - 用 req.query 填充数组

Question

我想用 req.params 填充一个数组，所以我现在可以轻松地编辑我的代码，代码是这样的。

let test = [req.query.t0,req.query.t1,req.query.t2,req.query.t3,req.query.t4,req.query.t5,req.query.t6,req.query.t7,req.query.t8,req.query.t9,req.query.t10,req.query.t11]

有没有办法用循环或填充图轻松填充我的数组？

像这样。

let init = 0;
let end = 19;
let test = Array(req.query.init-req.query.end+1)
.fill()
.map(() => init++);

Answer 1

如果可以使用Object.values:

var req = { query: { t0: 't0', t1: 't1', t2: 't2' }};
var params = Object.values(req.query);
console.log(params);

如果不能，也可以使用 Object.keys:

var req = { query: { t0: 't0', t1: 't1', t2: 't2' }};
var params = Object.keys(req.query).map(key => req.query[key]);
console.log(params);

如果你想检索有限数量的参数，你可以添加array.prototype.filter:

var req = { query: { t0: 't0', t1: 't1', t2: 't2', t3: 't3', t4: 't4' }};
var nbParams = 3;
var params = Object.keys(req.query).filter((key, i) => i < nbParams).map(key => req.query[key]);
console.log(params);