30-seconds-of-code/snippets/generateItems.md

title, tags, expertise, cover, firstSeen, lastUpdated

title	tags	expertise	cover	firstSeen	lastUpdated
Generate items	array,function	intermediate	blog_images/generator.jpg	2020-10-09T20:41:21+03:00	2020-10-22T20:23:47+03:00

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]