array-reduceby v0.1.2

array-reduceby

NOTE: array-reduceby was renamed to @extra-array/reduce.

Reduce array to a single value, like Array.reduce().

const reduceBy = require('array-reduceby');
// reduceBy(<array>, <reduce function>, [initial value], [begin=0], [end])
// - <reduce function>(<accumulator>, <value>, <index>, <array>)

reduceBy(['a', 'b'], (acc, v) => acc+v);
// 'ab'
reduceBy(['a', 'b', 'c', 'd'], (acc, v, i, arr) => acc+v, 'z');
// 'zabcd'
reduceBy(['a', 'b', 'c', 'd'], (acc, v, i, arr) => acc+v, 'z', 1);
// 'zbcd'
reduceBy(['a', 'b', 'c', 'd'], (acc, v, i, arr) => acc+v, 'z', 1, 3);
// 'zbc'