How to instantiate an array when a user inputs?

Question

When a user inputs text I want to create an array with the name of the inputted text and add it to array logNum. I've tried like this but it doesn't work:

logNum.push(var document.getElementById("buttonInput").value.toString()[]);

Any ideas?

Denys Séguret · Accepted Answer · 2012-09-10 07:33:24Z

4

Assuming you've yet created your logNum array, you can do this :

 logNum.push([document.getElementById("buttonInput").value]);

The [something] notation creates a new array whose first element is something.

answered Sep 10, 2012 at 7:33

Denys Séguret

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2 Comments

user1656125 Over a year ago

Thanks! So the new array doesn't have a name.. just an index within logNum?

Denys Séguret Over a year ago

Yes. There is no point in giving a name to a variable if you want to get it from an array later.

ncank · Accepted Answer · 2012-09-10 07:39:00Z

0

i'm not sure i understood you, but try this:

logNum.push( window[ document.getElementById("buttonInput").value ] = [] );

first, we generate out array: window[ document.getElementById("buttonInput").value ] = [] this creates an array with a user-input name.

and remember that assignments always returns the value of right-hand-side. so new array will be returned.

then, push the returned value to logNum array.

answered Sep 10, 2012 at 7:39

ncank

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