Question

这是我的数组定义（可能存在问题。我想说这个数组将是自定义对象的数组）：

const records: {LicencePlate: string, Description: string, 
SetToUse: string, Depot: string, Active: boolean}[] = [];

然后我要填充它：

  this.grid.gridView.data.forEach(element => {
      records.push(element.LicencePlate, element.Description, element.DateOfStartUse.toLocaleDateString('en-GB'),
      element.Base, element.Active);
    });

我想得到这样的东西-对象数组

[{"Johnny", "Actor", "05/03/2000", "Holywood", true}, 
 {"Kirk", "Musician", "01/06/1999", "California", true}, 
 {"Elvis", "Singer", "15/09/1975", "Mississippi", false}]

但是我只有一个很长的单值数组：

["Johnny", "Actor", "05/03/2000", "Holywood", true, 
"Kirk", "Musician", "01/06/1999", "California", true, 
"Elvis", "Singer", "15/09/1975", "Mississippi", false]

我在哪里弄错了？

Answer 1

您需要在每次迭代时将一个新对象推入数组。

类似的东西：

this.grid.gridView.data.forEach(element => {
  // create object for this row
  const o = {
    LicencePlate: element.LicencePlate,
    Description: element.Description,
    /// other properties and values
  }
  // push that object to array
  records.push(o);
});

Answer 2

-编辑糟糕，这是js，您想要ts ..忽略。我将把它留在这里。

除了charlietfl的答案外，有关 <array>.push：

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push

arr.push(element1[, ...[, elementN]])

您要想要将单个元素最后放入数组索引中，

但是您正在将元素的每个字段按新索引推入数组。

charlietfl的答案实际上是每个元素的浅表重复，您也可以直接直接推送元素：

let records = []; //or new Array();
//typescript will let you do new Array<Record>(), but not in javascript

this.grid.gridView.data.forEach(element => {
  records.push(element);
});

我执行的记录：

//An implementation of your record object (you apparently already have these, so you don't need it)
class Record {
  constructor (licensePlate) {
    this.licensePlate = licensePlate;
    this.description = description;
    this.setToUse = setToUse;
    this.depot = depot;
    this.active = active;
  }
}

let records = new Array(); //In typescript we can have Array<Record> for typed array, but not in js :(

//I'm creating a test record here because I don't have your gridView code
let rec = new Record("BLAHBLAH", "A record example instance", "some kind of set to use", "a depot", false);

records.push(rec); //Push the record instance|object into the array

//this.grid.gridView.data.forEach(element => {
//  records.push(element.LicencePlate, element.Description, element.DateOfStartUse.toLocaleDateString('en-GB'),
//  element.Base, element.Active);
//});

TS：定制对象数组的定义

2 个答案: