reduce

Reduce values of iterable to a single value.

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

function reduce(x, fr, acc?)
// x:   an iterable
// fr:  reduce function (acc, v, i, x)
// acc: initial value

const xiterable = require('extra-iterable');

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

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

References

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