Angular 2 - Unable to copy values from one object to another using typescript for

Question

I have a employee object and i want to copy some of the values in to a new object. I'm using Typescript for to copy them, but i'm getting error.

Typescript code:

employee = [
    { "empId": "59C", "empDesc": "Software","location":"Dallas"},
    { "empId": "AMI", "empDesc": "Hardware", "location":"San Francisco"}
  ];
  companies : any;
  for (let c of this.employee) {
      this.companies.push({
        empDesc: c.empDesc,
        empId: c.empId
      })
    };
  console.log("Companies",this.companies);

Plunker code link:

https://plnkr.co/edit/CnBR4JouNhzH3DWm7QCo?p=preview

Sumama Waheed · Accepted Answer · 2017-03-07 22:21:34Z

2

You need to run that code in a function. Here I'm running it in the constructor. You can only declare variables in the class.

also you need to initialize companies with an empty array.

  employee = [
    { "empId": "59C", "empDesc": "Software","location":"Dallas"},
    { "empId": "AMI", "empDesc": "Hardware", "location":"San Francisco"}
  ];
  companies : any = [];


  constructor(){
    for (let c of this.employee) {
      this.companies.push({
        empDesc: c.empDesc,
        empId: c.empId
      })
    };
   console.log("Companies",this.companies);

  }

edited Mar 7, 2017 at 22:21

answered Mar 7, 2017 at 20:26

Sumama Waheed

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Comments

Madhu Ranjan · Accepted Answer · 2017-03-07 20:29:06Z

2

There are couple of issues,

you have to write code iside some function

constructor(){
    for (let c of this.employee) {
      this.companies.push({
        empDesc: c.empDesc,
        empId: c.empId
      })
    };
  console.log("Companies",this.companies);
 }

and initialize companies property,

Check out updated the Plunker!!

Hope this helps!!

answered Mar 7, 2017 at 20:29

Madhu Ranjan

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Comments

UofABBallCoder626 · Accepted Answer · 2017-03-07 20:40:05Z

0

This worked for me:

public employee: any[] = [];
public companies: any[] = [];

ngOnInit() {
    this.employee = [
    { "empId": "59C", "empDesc": "Software","location":"Dallas"},
    { "empId": "AMI", "empDesc": "Hardware", "location":"San Francisco"}
    ];


    for (let c of this.employee) {
      let temp = [{
        empDesc: c.empDesc,
        empId: c.empId
      }]
      this.companies.push(temp);
    };
    console.log("Companies",this.companies);
}

answered Mar 7, 2017 at 20:40

UofABBallCoder626

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