Javascript multidimensional array key - val

Question

In my javascript function i have two single array like this:

var row = ["var1","var2","var3"];
var col = ["res1","res2","res3"];

i would create a multidimensional array like:

[["var1","res1"],["var2","res2"],["var3","res3"]]

i tried:

new Array(m).fill(new Array(n).fill(0));

or solution like:

var dict = [[]];
for (i = 0; i < descendents.length; i++) {
    e = descendents[i];
    dict[i] = dict[i][e.id]
    dict[i] = dict[i][e.value]
}

but the result is not correct for me. i don't know how achieve this

Thanks in advance

`row.map((e, i) => [e, col[i]])` – Tushar Jun 22 '17 at 05:38 — Tushar, Jun 22 '17 at 05:38
`e, col[i]` - sounds like a virus :p – Jaromanda X Jun 22 '17 at 05:38 — Jaromanda X, Jun 22 '17 at 05:38

Pranav C Balan · Answer 1 · 2017-06-22T13:59:32.347

Use Array#map to generate a new array based on existing.

var row = ["var1", "var2", "var3"];
var col = ["res1", "res2", "res3"];
 
// iterate and generate new array based on row array element
// and fetch element from col using the same index
var res = row.map((v, i) => [v, col[i]]);

console.log(res)

Or with Array.from with a map function.

var row = ["var1", "var2", "var3"];
var col = ["res1", "res2", "res3"];

var res = Array.from({ length: row.length }, (_, i) => [row[i], col[i]]);

console.log(res)

Javascript multidimensional array key - val

1 Answers1