foop
Version:
interfaces that describe their intentions.
28 lines (24 loc) • 768 B
JavaScript
const size = require('../../util/size')
/**
* A specialized version of `reduce` for arrays.
* @since 5.0.0-beta.6
*
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @param {boolean} [initAccum] Specify using the first element of `array` as
* the initial value.
* @return {*} Returns the accumulated value.
*/
function arrayReduce(array, iteratee, accumulator, initAccum) {
let index = -1
const length = size(array)
if (initAccum && length) {
accumulator = array[++index]
}
while (++index < length) {
accumulator = iteratee(accumulator, array[index], index, array)
}
return accumulator
}
module.exports = arrayReduce