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Way to ng-repeat defined number of times instead of repeating over array?

Posted by: admin November 2, 2017 Leave a comment

Questions:

Is there a way to ng-repeat a defined number of times instead of always having to iterate over an array?

For example, below I want the list item to show up 5 times assuming $scope.number equal to 5 in addition incrementing the number so each list item increments like 1, 2, 3, 4, 5

Desired result:

<ul>
   <li><span>1</span></li>
   <li><span>2</span></li>
   <li><span>3</span></li>
   <li><span>4</span></li>
   <li><span>5</span></li>
</ul>
Answers:

At the moment, ng-repeat only accepts a collection as a parameter, but you could do this:

<ul>
    <li ng-repeat="i in getNumber(number)"><span>{{$index+1}}</span></li>
</ul>

And somewhere in your controller:

$scope.number = 5;
$scope.getNumber = function(num) {
    return new Array(num);   
}

This would allow you to change $scope.number to any number as you please and still maintain the binding you’re looking for.

Here is a fiddle with a couple of lists using the same getNumber function.

EDIT 1/6/2014: Newer versions of Angular make use of the following syntax:

<li ng-repeat="i in getNumber(number) track by $index">

Questions:
Answers:

you can do this:

<div ng-repeat="i in [1, 2, 3, 4]">
  ...
</div>

Questions:
Answers:

Here is an example of how you could do this. Note that I was inspired by a comment in the ng-repeat docs: http://jsfiddle.net/digitalzebra/wnWY6/

Note the ng-repeat directive:

<div ng-app>
    <div ng-controller="TestCtrl">
        <div ng-repeat="a in range(5) track by $index">{{$index + 1}}</div>
    </div>
</div>

Here is the controller:

function TestCtrl($scope) {
    $scope.range = function(n) {
        return new Array(n);
    };
};

Questions:
Answers:

I think this jsFiddle from this thread might be what you’re looking for.

<div ng-app ng-controller="Main">
   <div ng-repeat="item in items | limitTo:2">
       {{item.name}}
   </div>
</div>

Questions:
Answers:

I ran into the same issue. I came across this thread, but didn’t like the methods they had here. My solution was using underscore.js, which we had already installed. It’s as simple as this:

<ul>
    <li ng-repeat="n in _.range(1,6)"><span>{{n}}</span></li>
</ul>

This will do exactly what you’re looking for.

Questions:
Answers:

I wanted to keep my html very minimal, so defined a small filter that creates the array [0,1,2,…] as others have done:

angular.module('awesomeApp')
  .filter('range', function(){
    return function(n) {
      var res = [];
      for (var i = 0; i < n; i++) {
        res.push(i);
      }
      return res;
    };
  });

After that, on the view is possible to use like this:

<ul>
  <li ng-repeat="i in 5 | range">
    {{i+1}}
  <li>
</ul>

Questions:
Answers:

This is really UGLY, but it works without a controller for either an integer or variable:

integer:

<span ng-repeat="_ in ((_ = []) && (_.length=33) && _) track by $index">{{$index}}</span>

variable:

<span ng-repeat="_ in ((_ = []) && (_.length=myVar) && _) track by $index">{{$index}}</span>

Questions:
Answers:

There are many ways to do this. I was really bothered at having the logic in my controller so I created a simple directive to solve the problem of repeating an element n-times.

Installation:

The directive can be installed using bower install angular-repeat-n

Example:

<span ng-repeat-n="4">{{$index}}</span

produces: 1234

It also works using a scope variable:

<span ng-repeat-n="repeatNum"></span>

Source:

Github

Questions:
Answers:

A simpler approach would be (for an example of 5 times):

<div ng-repeat="x in [].constructor(5) track by $index">
       ...
</div>

Questions:
Answers:

This is only a slight variation on the accepted answer, but you don’t really need to create a new function. Only to import ‘Array’ in the scope:

<div ng-app="myapp">
    <div ng-controller="ctrlParent">
        <ul>
            <li ng-repeat="i in counter(5) track by $index">
              <span>{{$index+1}}</span></li>
        </ul>
    </div>
</div>
var app = angular.module('myapp',[]);
app.controller('ctrlParent',function($scope){
    $scope.myNumber = 5;
    $scope.counter = Array;
});

See this fiddle for a live example.

Questions:
Answers:

Easiest answer: 2 lines of code

JS (in your AngularJS controller)

$scope.range = new Array(MAX_REPEATS); // set MAX_REPEATS to the most repetitions you will ever need in a single ng-repeat that makes use of this strategy

HTML

<div ng-repeat="i in range.slice(0,repeatCount) track by $index"></div>

…where repeatCount is the number of repetitions that should appear in this location.

Questions:
Answers:

angular gives a very sweet function called slice.. using this you can achieve what you are looking for.
e.g. ng-repeat=”ab in abc.slice(startIndex,endIndex)”

this demo :http://jsfiddle.net/sahilosheal/LurcV/39/ will help you out and tell you how to use this “making life easy” function. 🙂

html:

<div class="div" ng-app >
    <div ng-controller="Main">
        <h2>sliced list(conditional NG-repeat)</h2>
        <ul ng-controller="ctrlParent">
            <li ng-repeat="ab in abc.slice(2,5)"><span>{{$index+1}} :: {{ab.name}} </span></li>
        </ul>
        <h2>unsliced list( no conditional NG-repeat)</h2>
         <ul ng-controller="ctrlParent">
            <li ng-repeat="ab in abc"><span>{{$index+1}} :: {{ab.name}} </span></li>
        </ul>

    </div>

CSS:

ul
{
list-style: none;
}
.div{
    padding:25px;
}
li{
    background:#d4d4d4;
    color:#052349;
}

ng-JS:

 function ctrlParent ($scope) {
    $scope.abc = [
     { "name": "What we do", url: "/Home/AboutUs" },
     { "name": "Photo Gallery", url: "/home/gallery" },
     { "name": "What we work", url: "/Home/AboutUs" },
     { "name": "Photo play", url: "/home/gallery" },
     { "name": "Where", url: "/Home/AboutUs" },
     { "name": "playground", url: "/home/gallery" },
     { "name": "What we score", url: "/Home/AboutUs" },
     { "name": "awesome", url: "/home/gallery" },
     { "name": "oscar", url: "/Home/AboutUs" },
     { "name": "american hustle", url: "/home/gallery" }
    ];
}
function Main($scope){
    $scope.items = [{sort: 1, name: 'First'}, 
                    {sort: 2, name: 'Second'}, 
                    {sort: 3, name: 'Third'}, 
                    {sort: 4, name:'Last'}];
    }

Questions:
Answers:

Heres an answer for angular 1.2.x

Basically it is the same, with the slight modification of of the ng-repeat

<li ng-repeat="i in getNumber(myNumber) track by $index">

here is the fiddle: http://jsfiddle.net/cHQLH/153/

this is because angular 1.2 doesn’t allow duplicate values in the directive. This means if you are trying to do the following, you will get an error.

<li ng-repeat="x in [1,1,1]"></li>

Questions:
Answers:

You can use the ng-if directive with ng-repeat

So, if num is the number of times you need the element repeated:

<li ng-repeat="item in list" ng-if="$index < num">

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Answers:

For users using CoffeeScript, you can use a range comprehension:

Directive

link: (scope, element, attrs) ->
  scope.range = [1..+attrs.range]

or Controller

$scope.range = [1..+$someVariable]
$scope.range = [1..5] # Or just an integer

Template

<div ng-repeat="i in range">[ the rest of your code ]</div>

Questions:
Answers:

First, create an angular filter using LoDash:

angular.module('myApp').filter('times', function(){
   return function(value){
      return _.times(value || 0);
   }
});

The LoDash times function is capable of handling null, undefined, 0, numbers, and string representation of numbers.

Then, use it in your HTML as this:

<span ng-repeat="i in 5 | times">
 <!--DO STUFF-->
</span>

or

<span ng-repeat="i in myVar | times">
 <!--DO STUFF-->
</span>

Questions:
Answers:

You can use this example.

Inside controller:

$scope.data = {
    'myVal': 33,
    'maxVal': 55,
    'indexCount': function(count) {
        var cnt = 10;
        if (typeof count === 'number') {
            cnt = count;
        }
        return new Array(cnt);
    }
};

Example for select element at the HTML code side:

<select ng-model="data.myVal" value="{{ data.myVal }}">
    <option ng-repeat="i in data.indexCount(data.maxVal) track by $index" value="{{ $index + 1 }}">{{ $index + 1 }}</option>
</select>

Questions:
Answers:

If n is not too high, another option could be to use split(”) with a string of n characters :

<div ng-controller="MainCtrl">
<div ng-repeat="a in 'abcdefgh'.split('')">{{$index}}</div>
</div>

Questions:
Answers:

I needed a more dynamic solution to this – where I could increment the repeat.

HTML

<div ng-repeat="n in newUserCount">
<input type="text" value="" name="newuser{{n}}"/>
</div>

Duplicator Control

<span class="helper" ng-click="duplicateUser()">
Create another user with the same permissions
</span>

JS

 $scope.newUserCount = Array('1');
var primaryValue = 1;
$scope.duplicateUser = function()
{
    primaryValue++;
    $scope.newUserCount.push(primaryValue)
}

Questions:
Answers:

Angular provides filters to modify a collection. In this case the collection would be null, i.e. [], and the filter also takes arguments, as follows:

<div id="demo">
    <ul>
        <li ng-repeat="not in []|fixedNumber:number track by $index">{{$index}}</li>
    </ul>
</div>

JS:

module.filter('fixedNumber', function() {
    return function(emptyarray, number) {
        return Array(number);
    }
});

module.controller('myCtrl', ['$scope', function($scope) {
    $scope.number = 5;
}]);

This method is very similar to those proposed above and isn’t necessarily superior but shows the power of filters in AngularJS.

Questions:
Answers:

I encountered the same problem and this is what I came out with:

(function () {
  angular
    .module('app')
    .directive('repeatTimes', repeatTimes);

  function repeatTimes ($window, $compile) {
    return { link: link };

    function link (scope, element, attrs) {
      var times    = scope.$eval(attrs.repeatTimes),
          template = element.clone().removeAttr('repeat-times');

      $window._(times).times(function (i) {
        var _scope = angular.extend(scope.$new(), { '$index': i });
        var html = $compile(template.clone())(_scope);

        html.insertBefore(element);
      });

      element.remove();
    }
  }
})();

… and the html:

<div repeat-times="4">{{ $index }}</div>

LIVE EXAMPLE

I used underscore’s times function as we where already using it on the project, but you can easily replace that with native code.

Questions:
Answers:

I am creating a reusable directive where the max number will come from another ng-repeat. So, this is an edit over the best voted answer.

Just change the code at controller to this –

$scope.getNumber = function(num) {
    var temp = [];
    for(var j = 0; j < num; j++){
        temp.push(j)
    }
    return temp; 
}

This will return a new array with specified number of iterations

Questions:
Answers:

since this declaration prints 4 elements:

<li ng-repeat = "k in 'aaaa' track by $index">
   {{$index}}
</li>

we can use this ugly but no-footprint workaround using the number|n decimal places native filter.

 <li ng-repeat="k in (0|number:mynumber -2 ) track by $index">
    {{$index}}
 </li>

this way you’ll have mynumber elements with no extra code.
Remember to subtract 2 to mynumber to avoid the first two ‘0.’ characters prepended to the decimal places (like ‘0.0000’).
Edited:
doesn’t work for numbers less than 3. But might be useful in some cases.