como usar o unzip no javascript es6

January 04, 2020

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.

const unzip = arr =>
  arr.reduce(
    (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc),
    Array.from({
      length: Math.max(...arr.map(x => x.length))
    }).map(x => [])
  );

unzip([['a', 1, true], ['b', 2, false]]); // [['a', 'b'], [1, 2], [true, false]]
unzip([['a', 1, true], ['b', 2]]); // [['a', 'b'], [1, 2], [true]]

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