Append nested array
I have a result from Q.all()
that looks something like this:
promise = [Arr1,Arr2,Arr3....]
Each Arr
can be either null
an array of plain JS objects.
I want to combine all of these arrays into one big array;
I can loop through and use the array method concat
to join them.
Is there any other elegant solution built into JS?
Here is an array of samples -
[
{
"endDate": "2015-06-11 14:52:00",
"quantity": 75,
},
{
"endDate": "2015-06-11 14:42:00",
"quantity": 78,
},
{
"endDate": "2015-06-01 14:43:00",
"quantity": 69,
},
{
"endDate": "2015-05-14 13:38:00",
"quantity": 85,
}
]
I also have these libraries
lodash
,angular
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I believe it is a combination of flattenDeep
(for alignment) and without
(for removing null
s - at least I think you meant to remove null
s, if not, take without
out):
var result = _.without(_.flattenDeep(yourArray), null);
Live example:
// NOTE: You said you had an array with arrays in it, so I've taken
// the one array you gave and used it as two entries in the array
// below (with some minor mods). Note also the nulls.
var yourArrays = [
[
{
"endDate": "2015-06-11 14:52:00",
"quantity": 75
},
{
"endDate": "2015-06-11 14:42:00",
"quantity": 78
},
{
"endDate": "2015-06-01 14:43:00",
"quantity": 69
},
{
"endDate": "2015-05-14 13:38:00",
"quantity": 85
}
],
null,
null,
[
{
"endDate": "2015-07-11 14:52:00",
"quantity": 12
},
{
"endDate": "2015-07-11 17:42:00",
"quantity": 34
},
{
"endDate": "2015-07-01 13:43:00",
"quantity": 56
},
{
"endDate": "2015-08-14 12:38:00",
"quantity": 85
}
]
];
var result = _.without(_.flattenDeep(yourArrays), null);
document.body.insertAdjacentHTML(
"beforeend",
"<pre>" + JSON.stringify(result, null, 2) + "</pre>"
);
<script src="https://cdn.rawgit.com/lodash/lodash/3.0.1/lodash.min.js"></script>
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