Add object value instead of reference to the new variable in Type Script

Question

saveOccuraces(currentFrequency: Frequencies) {
  var freq = new Frequencies();
  freq = currentFrequency;
  // freq.occurance = currentFrequency.occurance; // <--Problem is here
  this.selectedFrequencies.push(freq);
}

<md-input-container>
  <input type="number" [(ngModel)]="currentFrequency.occurance" mdInput placeholder="Every" name="occurance">
</md-input-container>

<button md-icon-button (click)="saveOccuraces(currentFrequency)">
  <md-icon>add</md-icon>
</button>

In the above code if I execute as it is, all occurrence values are updating with new one, if i comment freq=currentFrequency; line and un comment freq.occurance = currentFrequency.occurance; then it is working fine.

Is there any alternative to push objects with value only (withou

you are talking about docs.angularjs.org/api/ng/function/angular.copy — invernomuto
– invernomuto, Commented Sep 6, 2017 at 5:10
Possible duplicate of Difference between angular.copy() and assignment (=) — invernomuto
– invernomuto, Commented Sep 6, 2017 at 5:12

Sreemat · Accepted Answer · 2017-09-06 05:13:52Z

1

You can create a constructor in Frequencies like below

Frequencies(frequencies:Frequencies){
this.occurance = frequencies.occurance;
}

Change the code like this

saveOccuraces(currentFrequency:Frequencies){
        var freq= new Frequencies(currentFrequency);
        this.selectedFrequencies.push(freq);
    }

Alternative Way using Object.Assign()

saveOccuraces(currentFrequency:Frequencies){
            var freq= Object.assign(new Frequencies(),currentFrequency);
            this.selectedFrequencies.push(freq);
        }

answered Sep 6, 2017 at 5:13

Sreemat

62610 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Add object value instead of reference to the new variable in Type Script

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related