rambda/src/reduce.js

Lightweight and faster alternative to Ramda with included TS definitions

import { isArray } from './_internals/isArray.js'

export function reduce(reducer, acc) {
  return list => {
    if (list == null) {
      return acc
    }
    if (!isArray(list)) {
      throw new TypeError('reduce: list must be array or iterable')
    }
    let index = 0
    const len = list.length

    while (index < len) {
      acc = reducer(acc, list[index], index, list)
      index++
    }

    return acc
  }
}