How to insert array into specific index of array?

Question

I have tried the following but they don't work. I want a result like [[[arr1],[arr2],[arr3]],[[arr4],[arr5],[arr6]]].

array3[counter].push(array2[e+f]);
//Uncaught TypeError: Cannot call method 'push' of undefined 

array3.splice(counter,0,array2[e+f]);
//[Array[2], Array[3], Array[4], Array[4], Array[2], Array[3]]

Here is my source code if it helps: http://jsfiddle.net/yUXPz/

array3[counter] is the value at index counter, not an array - hence you can't call .push on it. — Benjamin Gruenbaum
– Benjamin Gruenbaum, Commented Jan 20, 2014 at 20:22
"Uncaught TypeError: Cannot call method 'push' of undefined" -> array3[counter] = undefined -> no value at counter. — Karoly Horvath
– Karoly Horvath, Commented Jan 20, 2014 at 20:24

LameCoder · Accepted Answer · 2014-01-20 21:10:12Z

2

If you're trying to add an array to array3 at the specified counter location then use this:

            array3[counter] = [];
            array3[counter].push(array2[e+f]);

Here is the output I got:

Is that what you're looking to get?

answered Jan 20, 2014 at 21:10

LameCoder

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1 Comment

hexicle Over a year ago

I needed the array to look like this [[[arr1],[arr2],[arr3]],[[arr4],[arr5],[arr6]]] i.e. 3 arrays in every array, because my code was just to help me solve this HackerRank problem: hackerrank.com/challenges/two-arrays., and I needed that array structure for my algorithm.

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