Deleting a column from a multidimensional array in javascript

Question

I have a 2D array:

var array = [[\"a\", \"b\", \"c\"],[\"a\", \"b\", \"c\"],[\"a\", \"b\", \"c\"]]

I want to delete an entire column of thi

Answer 1

Iterate through the array and splice each sub array:

var idx = 2;
for(var i = 0 ; i < array.length ; i++)
{
   array[i].splice(idx,1);
}

JSFiddle.

Edit: I see you don't want to use splice due to out-of-bounds problems and array length changing. So:

1.You can check if you're out of bounds and skip the slice.
2.You can create an array of indexes you want to delete and simply create new arrays from the indexes that don't appear in that array (instead of deleting, create new arrays with the opposite condition).

Something like this:

var array = [
    ["a", "b", "c"],
    ["a", "b", "c"],
    ["a", "b", "c"]
];

var idxToDelete = [0,2];

for (var i = 0; i < array.length; i++) {
    var temp = array[i];
    array[i] = [];
    for(var j = 0 ; j < temp.length ; j++){
        if(idxToDelete.indexOf(j) == -1) // dont delete
        {
            array[i].push(temp[j]);
        }
    }
}

New JSFiddle.