@arr/reduce

A tiny, faster alternative to native Array.prototype.reduce

Install

$ npm install --save @arr/reduce

Usage

import reduce from '@arr/reduce';

const total = reduce([0, 1, 2, 3], (sum, value) => sum + value);
//=> 6

const flattened = reduce([[0, 1], [2, 3], [4, 5]], (a, b) => a.concat(b), []);
//=> [0, 1, 2, 3, 4, 5]

API

reduce(arr, callback[, initialValue])

arr

Type: Array
The array to iterate upon.

callback(accumulator, value, index, array)

Type: Function
Function to test for each element, taking four arguments:

• accumulator -- The accumulator accumulates the callback's return values.
• value -- The current element being processed in the array.
• index -- The index of the current element being processed in the array.
• array -- The array reduce was called upon.

initialValue

Type: Mixed
Default: arr[0]
The value to use as the first argument to the first call of the callback. If no initial value is supplied, the first element in the array will be used.

License

MIT © Luke Edwards