Reduces values from right, to a single value. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

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

This is part of package extra-array.

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

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

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

array.reduceRight(x, (acc, v) => acc+v, 100);
// 110

References

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