Whenever I try to utilize the "ng-list" in JavaScript, I encounter issues accessing the variable model

Question

Whenever I try to utilize the "ng-list" in JavaScript, I encounter issues accessing the variable model

HTML

<input type="text" ng-list ng-model="OtherHobby" />{{OtherHobby}} <br />
    {{AllHobbys}}

Javascript

$scope.OtherHobby = [];
        $scope.AllHobbys = $scope.OtherHobby;

I ran a test on this piece of code. The variable "OtherHobby" works as expected, displaying the input from the textbox. However, the variable "AllHobbys" does not show anything. I am puzzled by this discrepancy. Can anyone explain why that might be happening?

javascript angularjs

Answer 1

Answer №1

The problem might be related to references. To resolve this issue, you can initialize "otherHobby" as an object.

Here is a snippet of the HTML code:

<input type="text" ng-list ng-model="otherHobby.value" />{{otherHobby.value}} </br> {{allHobbys.value}}

Below is the corresponding Javascript code:

$scope.otherHobby = {};
$scope.allHobbys = $scope.otherHobby;

Remember to use camelCase when naming variables for better readability.

Answer 2

The problem might be related to references. To resolve this issue, you can initialize "otherHobby" as an object.

Here is a snippet of the HTML code:

<input type="text" ng-list ng-model="otherHobby.value" />{{otherHobby.value}} </br> {{allHobbys.value}}

Below is the corresponding Javascript code:

$scope.otherHobby = {};
$scope.allHobbys = $scope.otherHobby;

Remember to use camelCase when naming variables for better readability.

Answer 3

Answer №2

Consider implementing $watch on your variable. You may find this helpful jsfiddle example.

Have a great day!

Answer 4

Consider implementing $watch on your variable. You may find this helpful jsfiddle example.

Have a great day!

Answer 5

Answer №3

Instead of using $watch, consider finding an alternative method as Angular has to create a deep clone of the entire array for monitoring purposes.

It seems unnecessary to have two identical references to one object. If you provide more context, I may be able to propose a more efficient solution. Best of luck!

Answer 6

Instead of using $watch, consider finding an alternative method as Angular has to create a deep clone of the entire array for monitoring purposes.

It seems unnecessary to have two identical references to one object. If you provide more context, I may be able to propose a more efficient solution. Best of luck!

Answer 7

Answer №4

Here are a few important points to consider:

$scope.OtherHobby = []; // By assigning ng-model=OtherHobby, you are creating an array that will now hold string values instead of array values.
When you execute
```
$scope.allHobbys = $scope.otherHobby;
```
, both variables point to the same memory location.
However, when you update a value in the textbox, it creates a new string (as strings are immutable).
As a result, $scope.OtherHobby now points to a different location than before.
But your $scope.allHobby still points to the original location.

Check out this demo for further insight.

Answer 8

Here are a few important points to consider:

$scope.OtherHobby = []; // By assigning ng-model=OtherHobby, you are creating an array that will now hold string values instead of array values.
When you execute
```
$scope.allHobbys = $scope.otherHobby;
```
, both variables point to the same memory location.
However, when you update a value in the textbox, it creates a new string (as strings are immutable).
As a result, $scope.OtherHobby now points to a different location than before.
But your $scope.allHobby still points to the original location.

Check out this demo for further insight.

Whenever I try to utilize the "ng-list" in JavaScript, I encounter issues accessing the variable model

Answer №1

Answer №2

Answer №3

Answer №4

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