reduce

Reduces values to a single value. 🏃 📼 📦 🌔 📒

Similar: map, filter, reject, reduce, accumulate.

iterable.reduce(x, fr, [acc]);
// x:   an iterable
// fr:  reduce function (acc, v, i, x)
// acc: initial value

const iterable = require("extra-iterable");

var x = [1, 2, 3, 4];
iterable.reduce(x, (acc, v) => acc+v);
// 10

iterable.reduce(x, (acc, v) => acc+v, 100);
// 110

references

• Data.List.reduce: Haskell
• Array.prototype.reduce: MDN web docs
• iterable_reduce: PHP