iterate

87 bytes

since v12.1.0

Usage

A bit like forEach meets reduce. Useful for running a function n number of times to generate a value. The _.iterate function takes a count (the number of times to run the callback), a callback function, and an initial value. The callback is run count many times as a reducer and the accumulated value is then returned.

import * as _ from 'radashi'

const value = _.iterate(
  4,
  (acc, idx) => {
    return acc + idx
  },
  0,
) // => 10

Note, this is NOT zero indexed. If you pass a count of 5 you will get an index of 1, 2, 3, 4, 5 in the callback function.