Unzip an array of arrays
JavaScript version
const unzip = (arr) =>
arr.reduce(
(acc, c) => (c.forEach((v, i) => acc[i].push(v)), acc),
Array.from({ length: Math.max(...arr.map((a) => a.length)) }, (_) => [])
);
Example
unzip([
['a', 1],
['b', 2],
['c', 3],
['d', 4],
['e', 5],
]); // [['a', 'b', 'c', 'd', 'e'], [1, 2, 3, 4, 5]]
/*
a 1
b 2
c 3
d 4
e 5
*/