aaronshaf / callbag-scan

Callbag operator that combines consecutive values from the same source

callbag-scan

Callbag operator that combines consecutive values from the same source. It's essentially like array .reduce, but delivers a new accumulated value for each value from the callbag source. Works on either pullable or listenable sources.

npm install callbag-scan

example

const fromIter = require('callbag-from-iter');
const iterate = require('callbag-iterate');
const scan = require('callbag-scan');

const iterSource = fromIter([1,2,3,4,5]);
const scanned = scan((prev, x) => prev + x, 0)(iterSource);

scanned(0, iterate(x => console.log(x))); // 1
                                          // 3
                                          // 6
                                          // 10
                                          // 15