AngularJS limitTo filter for ngRepeat on an object (used like a dictionary)

问题

Is it possible to use limitTo filter on a ngRepeat directive which is repeating the properties of an Object and not items in an Array.

I am aware that the official documentation says that the input to limitTo needs to be an array or a string. But wondering if there's a way to get this to work.

Here's a sample code:

<li ng-repeat="(key, item) in phones_dict |orderBy:'-age'| limitTo:limit_items"></li>

And $scope.phones_dict is an Object like

{ 
     item_1: {name:"John", age: 24},
     item_2: {name:"Jack", age: 23}
}

回答1:

limitTo works only for strings and arrays, for object use own filter for example:

myApp.filter('myLimitTo', [function(){
    return function(obj, limit){
        var keys = Object.keys(obj);
        if(keys.length < 1){
            return [];
        }

        var ret = new Object,
        count = 0;
        angular.forEach(keys, function(key, arrayIndex){
            if(count >= limit){
                return false;
            }
            ret[key] = obj[key];
            count++;
        });
        return ret;
    };
}]);

Example on fiddle: http://jsfiddle.net/wk0k34na/2/

回答2:

Adding

 ng-if ="$index < limit"

to the ng-repeat tag did the trick for me, though it's probably not strictly the "right" way to do this.

回答3:

Or you could use 'track by $index'... And your limitTo would be:

limitTo: $index == 5 (or any value)

回答4:

Default limitTo filter has support for array-like objects (example) after 1.5.7

来源：https://stackoverflow.com/questions/25868760/angularjs-limitto-filter-for-ngrepeat-on-an-object-used-like-a-dictionary