Generate items

OSCC · JavaScript, Array, Function · Oct 22, 2020

Generates an array with the given amount of items, using the given function.

  • Use Array.from() to create an empty array of the specific length, calling fn with the index of each newly created element.
  • The callback takes one argument - the index of each element.
const generateItems = (n, fn) => Array.from({ length: n }, (_, i) => fn(i));
generateItems(10, Math.random);
// [0.21, 0.08, 0.40, 0.96, 0.96, 0.24, 0.19, 0.96, 0.42, 0.70]

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