Cannot push JSON object into Array

Question

I know it seems like a duplicate but it isn't. Nothing worked, whatever I tried.

I have a list in my angular module:

this.checkedInterviews = []

and then a function that does:

var interviewModel = {
                        interviewId: self.pendingInterviews[i].id,
                        status: self.pendingInterviews[i].status,
                        location: self.pendingInterviews[i].location,
                        start: self.pendingInterviews[i].start,
                        hideCheck: null
                    };
 this.checkedInterviews.push(JSON.stringify(interviewModel));

I get Cannot read property 'push' of undefined. ANy idea what the problem is?

You've misspelled the Array when you've declared it. You're missing an I in intervIews. — Dan
– Dan, Commented Sep 16, 2016 at 10:34
because I handwritten that part right now but it's correct in the code — Mocktheduck
– Mocktheduck, Commented Sep 16, 2016 at 10:36
could you please give us more code? It seems like your function doesn't have access to this.checkedInterviews. — JOSEFtw
– JOSEFtw, Commented Sep 16, 2016 at 10:37
looks like this in this.checkedInterviews.push isn't the same this as the this when you this.checkedInterviews = [] - as your code is extremely sparse, it's hard to say why — Jaromanda X
– Jaromanda X, Commented Sep 16, 2016 at 10:37
can you provide more code so we can check is the reference for this.checkedInterviews = [] is correct — Aatif Bandey
– Aatif Bandey, Commented Sep 16, 2016 at 10:39

nikjohn · Accepted Answer · 2016-09-16 10:42:58Z

3

var checkedIntervews = []
var interviewModel = {};
checkedIntervews.push(JSON.stringify(interviewModel));
console.log(checkedIntervews);

(function arrayPush() {
this.checkedIntervews = [];
var interviewModel = {};
this.checkedIntervews.push(JSON.stringify(interviewModel));
console.log(this.checkedIntervews);
})();

You want to try:

var checkedIntervews = []
var interviewModel = {};
checkedInterviews.push(JSON.stringify(interviewModel));
$scope.checkedInterviews = checkedInterviews; //If using AngularJS because Angular is tagged in the question

NOTE: You should be able to use this if all of this is in the same function. This should work in the global scope as well. The only reason why I've used a IIFE is to separate out the scopes

Snippet added above with both cases.

If is not clear what this is in your question btw.

edited Sep 16, 2016 at 10:42

answered Sep 16, 2016 at 10:35

nikjohn

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4 Comments

Mocktheduck Over a year ago

Wow ok I still get the error, it doesn't let me add an empty json either

nikjohn Over a year ago

Working snippet added

user5066707 Over a year ago

This doesn't reply to the question. You just created a new checkedInterviews (you mispelled: checkedIntervews) object Array and didn't answer about the this object. Why is this.checkedInterviews equal to undefined?

nikjohn Over a year ago

@TheProHands I've added a snippet with all of these things

Han · Accepted Answer · 2016-09-16 10:38:01Z

1

If they are putting in different functions then this in the second function is a different object.

answered Sep 16, 2016 at 10:38

Han

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Comments

Sachin Gupta · Accepted Answer · 2016-09-16 10:53:10Z

1

It seems, second function is using different this.

In Angular Module, you can assign this to some variable, then try to access it from second function.

E.g.:

var vm = this;
vm.checkedInterviews = [];

Now in function you should access it using:

vm.checkedInterviews.push();

edited Sep 16, 2016 at 10:53

answered Sep 16, 2016 at 10:44

Sachin Gupta

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1 Comment

Han Over a year ago

This way could lead to memory leak. So you'd better handle carefully.

Devidas Kadam · Accepted Answer · 2016-09-16 10:59:21Z

Try this Here is working fiddle

  var myApp = angular.module('myApp',[]);

  function MyCtrl($scope) {
  $scope.checkedInterviews = [];
  $scope.pendingInterviews = [{'id':1,'status':'pending','location':'abc','start':'start'}];
  for(i= 0; i < $scope.pendingInterviews.length; i++){
      var interviewModel = {
                      interviewId: $scope.pendingInterviews[i].id,
                      status: $scope.pendingInterviews[i].status,
                      location: $scope.pendingInterviews[i].location,
                      start: $scope.pendingInterviews[i].start,
                      hideCheck: null
      };
      console.log(interviewModel);
      $scope.checkedInterviews.push(JSON.stringify(interviewModel));
    }
  console.log($scope.checkedInterviews);
}

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