AngularJS对对象数组进行排序

Question

I'm trying to sort the next array but every time it gives me an error, I've looked for other solutions here in stack overflow but none of them seems to work.

$scope.builds = [build:[
    {'_id': '6384', 'name': Mock1, 'builDate': 20150302T110232},
    {'_id': '6383', 'name': Mock2, 'builDate': 20150209T130212},
    {'_id': '6382', 'name': Mock3, 'builDate': 20150103T145212}]
];
    var sorted = $scope.sortByKey($scope.builds.build[index],'builDate')

And this is my function:

    $scope.sortByKey = function (array, key) {
        return array.sort(function(a,b){
            var x = a[key] < b[key]? -1:1;
            return x;
        });
    }

Answer 1

$scope.builds is an array not an object, and index doesn't exist...try this:

$scope.builds = {build:[
    {'_id': '6384', 'name': Mock1, 'builDate': 20150302T110232},
    {'_id': '6383', 'name': Mock2, 'builDate': 20150209T130212},
    {'_id': '6382', 'name': Mock3, 'builDate': 20150103T145212}]
};
var sorted = $scope.sortByKey($scope.builds.build,'builDate')

Answer 2

There are multiple issues with this.

1) You are trying to use an array like an object

$scope.builds = [build:[

...should be...

$scope.builds = {build:[

2) 20150302T110232 is not a valid number (the T isn't allowed). So you need to turn those into strings (or turn them into actual Date objects, since that is what they appear to be).

3) $scope.builds.build[index] is an object, not an array. So, I'm guessing you meant $scope.builds.build instead.

var sorted = $scope.sortByKey($scope.builds.build[index],'builDate')

...should be...

var sorted = $scope.sortByKey($scope.builds.build,'builDate')

Answer 3

Its not 100% clear that this is the problem from your question, but you're declaring two levels of array at present.

Change the $scope.builds definition to:

$scope.builds = {build:[
    {'_id': '6384', 'name': Mock1, 'builDate': 20150302T110232},
    {'_id': '6383', 'name': Mock2, 'builDate': 20150209T130212},
    {'_id': '6382', 'name': Mock3, 'builDate': 20150103T145212}]
};

Answer 4

Worth noting as well that there are three values (0, 1, and -1) that can be returned from Array.prototype.sort . The sort evaluation needs to return the correct value or the sort will be unstable (and you may get an error).

Your sort function needs to look like this:

    return array.sort(function(a,b){
        if(a[key] == b[key]) { 
          return 0; 
        }

        return a[key] < b[key]? -1:1;
    });