I am working with an array of objects that each contain a date property. My goal is to group together all the objects with the same date into separate arrays, creating as many arrays as there are unique date values. I am looking for the most efficient way to iterate over the array and organize it. I am open to using Angular array functions for this task.
To achieve the desired result, a combination of $filter and iterating through an array would be ideal. Let's illustrate this with an example:
//sample values
var objects = [{exampleProp: undefined, date:new Date(3,1,1970) },
{exampleProp: undefined, date:new Date(2,1,1970)},
{exampleProp: undefined, date:new Date(2,1,1970)},
{exampleProp: undefined, date:new Date(1,1,1970)}];
//sort the master array by date property
objects = $filter('orderBy', objects, 'date')($scope);
//grouping the master object by date
var dictionary = {};
objects.forEach(function(object){
if(dictionary[object.date] == undefined)
dictionary[object.date] = [];
dictionary[object.date].push(object);
});
//converting the dictionary to an array of arrays
var objectsByDate = [];
for(var date in dictionary)
objectsByDate.push(dictionary[date]);
Refer to $filter and orderby documentation for more information on ordering by object properties.
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