Determines the index of value
in array
.
Note: this function is used to augment the Array
type in angular expressions. See
angular.Array
for more info.
angular.Array.indexOf(array, value);
array – {Array} –
Array to search.
value – {*} –
Value to search for.
{number}
– The position of the element in array
. The position is 0-based. -1
is returned if the value can't be found.
<div ng:init="books = ['Moby Dick', 'Great Gatsby', 'Romeo and Juliet']"></div> <input name='bookName' value='Romeo and Juliet'> <br> Index of '{{bookName}}' in the list {{books}} is <em>{{books.$indexOf(bookName)}}</em>.
it('should correctly calculate the initial index', function() { expect(binding('books.$indexOf(bookName)')).toBe('2'); }); it('should recalculate', function() { input('bookName').enter('foo'); expect(binding('books.$indexOf(bookName)')).toBe('-1'); input('bookName').enter('Moby Dick'); expect(binding('books.$indexOf(bookName)')).toBe('0'); });