Generating empty elements with ng-repeat in AngularJS

Question

Generating empty elements with ng-repeat in AngularJS

I am facing an issue with an array that has improper key order, such as:

1: Array[1]
2: Array[2]
4: Array[3]
7: Array[14]
21: Array[1]
22: Array[1]
23: Array[1]

When I use ng-repeat to iterate through this array, it generates empty elements for key values that are missing.

For example, it will generate elements for keys 1 and 2, but since there is no key 3, it will create an empty div in its place. This pattern continues after key 4, with three empty elements being generated. How can I resolve this issue?

javascript angularjs

Answer 1

Answer №1

If you encounter an issue with the array, there are two ways to address it. You can either correct the array by generating a new array with correct values or you can incorporate a check in the view to ensure that the elements are not null or undefined.

To fix the array:

var myArray = [[1], [1,2], null, [1,2,3]];
var newArray = [];
angular.forEach(myArray, function(a) {
  if (a && a.length) { 
    newArray.push(a);
  }
});

You can now utilize the new array to display the content in the view.

Alternatively, you can make adjustments in the view itself:

<div ng-repeat="item in myArray">
   <div ng-if="item !== null && item !== undefined">
   </div>
</div>

Answer 2

If you encounter an issue with the array, there are two ways to address it. You can either correct the array by generating a new array with correct values or you can incorporate a check in the view to ensure that the elements are not null or undefined.

To fix the array:

var myArray = [[1], [1,2], null, [1,2,3]];
var newArray = [];
angular.forEach(myArray, function(a) {
  if (a && a.length) { 
    newArray.push(a);
  }
});

You can now utilize the new array to display the content in the view.

Alternatively, you can make adjustments in the view itself:

<div ng-repeat="item in myArray">
   <div ng-if="item !== null && item !== undefined">
   </div>
</div>

Answer 3

Answer №2

Have you considered utilizing objects instead?

"items":[
    {"id":"A", "data":{}}, 
    {"id":"B", "data":{}}, 
    {"id":"C", "data":{}}, 
    {"id":"D", "data":{}}
]

Answer 4

Have you considered utilizing objects instead?

"items":[
    {"id":"A", "data":{}}, 
    {"id":"B", "data":{}}, 
    {"id":"C", "data":{}}, 
    {"id":"D", "data":{}}
]

Generating empty elements with ng-repeat in AngularJS

Answer №1

Answer №2

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