How to extract value from an array of array

Question

I have an array of array stored. I need to extract the particular value from this arrays.

e.g allarray contain the list of arrays allarray= [Array[3],Array[3],Array[3]]

Answer 1

Can try using map(). Example:

var allarray = [["a1","b1","c1"],["a2","b2","c2"],["a3","b3","c3"]],
    index = 2;
allarray.map(function(val, ind){
    document.write(allarray[ind][index] + '
');
});