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docs for angular.Array.count

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Igor Minar 2010-11-23 14:10:10 -08:00
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src/apis.js
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@ -239,6 +239,44 @@ var angularArray = {
* @ngdoc function
* @name angular.Array.count
* @function
*
* @description
* Determines the number of elements in an array. Optionally it will count only those elements
* for which the `condition` evaluets to `true`.
*
* Note: this function is used to augment the Array type in angular expressions. See
* {@link angular.Array} for more info.
*
* @param {Array} array The array to count elements in.
* @param {(Function()|string)=} condition A function to be evaluated or angular expression to be
* compiled and evaluated. The element that is currently being iterated over, is exposed to
* the `condition` as `this`.
* @returns {number} Number of elements in the array (for which the condition evaluates to true).
*
* @example
<pre ng:init="items = [{name:'knife', points:1},
{name:'fork', points:3},
{name:'spoon', points:1}]"></pre>
<ul>
<li ng:repeat="item in items">
{{item.name}}: points=
<input type="text" name="item.points"/> <!-- id="item{{$index}} -->
</li>
</ul>
<p>Number of items which have one point: <em>{{ items.$count('points==1') }}</em></p>
<p>Number of items which have more than one point: <em>{{items.$count('points&gt;1')}}</em></p>
@scenario
it('should calculate counts', function() {
expect(binding('items.$count(\'points==1\')')).toEqual(2);
expect(binding('items.$count(\'points>1\')')).toEqual(1);
});
it('should recalculate when updated', function() {
using('.doc-example li:first-child').input('item.points').enter('23');
expect(binding('items.$count(\'points==1\')')).toEqual(1);
expect(binding('items.$count(\'points>1\')')).toEqual(2);
});
*/
'count':function(array, condition) {
if (!condition) return array.length;