objectFromPairs

Creates an object from the given key-value pairs.

• Use Array.prototype.reduce() to create and combine key-value pairs.

const objectFromPairs = arr =>
  arr.reduce((a, [key, val]) => ((a[key] = val), a), {});

objectFromPairs([['a', 1], ['b', 2]]); // {a: 1, b: 2}