How to group by a date with a timestamp? (AngularJS)

Question

I have the following code:

<div ng-repeat="(key, value) in history | groupBy:'date'">
  <div>{{key}}</div>
  <div ng-repeat="item in value">
    {{item}}
  </div>
</div>

I want to show my history in this format:

2015-10-10
item 1
item 2
item 3

2015-10-11
item 4
item 5

2015-10-12
item 6
item 7

This code works correctly, but the date property is a timestamp. Each item differs by hours and seconds. It's important that the items are grouped by day without the time.

Answer 1

According to this answer made by the author of angular-filter I found a nice solution using momentjs:

html

<div ng-repeat="(key, value) in history | map: toDay | groupBy:'date'">
    <div>{{key}}</div>
    <div ng-repeat="item in value">
        {{item}}
    </div>
</div>

controller

$scope.toDay = toDay;

function toDay( history ) {
    history.day = moment( history.date ).format( "L" );
    return history;
}

Assuming you have a valid javascript Date object without using momentjs your function would be alike:

function toDay( history ) {
    history.date = history.date.toLocaleDateString();
    return history;
};