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unzip

TS JS Deno

Creates an array of arrays, ungrouping the elements in an array produced by [zip].

Use Math.max.apply() to get the longest subarray in the array, Array.prototype.map() to make each element an array. Use Array.prototype.reduce() and Array.prototype.forEach() to map grouped values to individual arrays.

typescript
const unzip = (arr: any[], size = 0) => {
return arr.reduce(
(acc, val) => (val.forEach((v: any, i: number) => acc[i].push(v)), acc),
Array.from({
length: size || Math.max(...arr.map((x) => x.length)),
}).map(() => [])
);
};
typescript
unzip([
["a", 1, true],
["b", 2, false],
]); // [['a', 'b'], [1, 2], [true, false]]
unzip([
["a", 1, true],
["b", 2],
]); // [['a', 'b'], [1, 2], [true]]
unzip(
[
["a", 1, true],
["b", 2, false],
],
3
); // [ ["a", "b"], [1, 2], [true, false], ]