CODEWITHSUNDEEP
javascript
panthro
panthro

Reputation: 24061

Pushing an array into another array?

I have an array:

var fileMetaData = [];

In a loop I want to push things to the array:

$('#gallery-manager-add-form .galleryImage').each(function(){

    fileMetaData.push(myTestArray);
});

For testing myTestArray is:

var myTestArray = new Array(2);
myTestArray['a'] = 'foo';
myTestArray['b'] = 'bar';

The problem is, when I get the contents of the array, it's just a comma (,).

Any ideas where I am going wrong?

Upvotes: 0

Views: 193

Answers (4)

dt192
dt192

Reputation: 1013

this should work

$('#gallery-manager-add-form .galleryImage').each(function(){

    fileMetaData.push(myTestArray[0],myTestArray[1]);

});

1 dimensional array http://jsfiddle.net/Gs6ZU/

2 dimensional array http://jsfiddle.net/fY9S5/1/

Upvotes: 0

Joe Enos
Joe Enos

Reputation: 40383

When you're assigning values to myTestArray['a'] and myTestArray['b'], you're not pushing them into the array, but rather assigning the values to properties of the object. To treat the items as values in an array, you'd need to use the integer indexes, or just push them:

myTestArray[0] = 'foo';
myTestArray.push('bar');

But the other part, where you're pushing into the fileMetaData array - if you're trying to push both items from myTestArray, you'd need to do that differently - if you push one array into another, you're pushing the array, not the items. You'd need to either loop through one at a time and push them that way, or use something like concat to merge the arrays.

Upvotes: 0

ColBeseder
ColBeseder

Reputation: 3669

Arrays use numerical keys. You've used "a" and "b".

Initialise it like this:

var myTestArray = ['foo', 'bar'];

Alternatively, use this to keep your code almost the same:

var myTestArray = new Array(2);
myTestArray[0] = 'foo';
myTestArray[1] = 'bar';

Upvotes: 1

Denys Séguret
Denys Séguret

Reputation: 382092

That's because you're confusing arrays and objects (which you should use).

If your keys are 'a' and 'b', use

var myTestArray = {};
myTestArray['a'] = 'foo';
myTestArray['b'] = 'bar';

If you really want to use an array, use 

var myTestArray = [];
myTestArray.push('foo'); // no explicit key 
myTestArray.push('bar');

You saw just a comma because, the standard representation of an array doesn't look for properties, so you were printing the equivalent of [[],[]].toString() which is ",".

Upvotes: 4

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