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ikbelkirasan/promise-series.js

Forked from gildas/promise-series.js
Created June 18, 2018 05:41
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execute promises in series
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promise-series.js
// Promise returning functions to execute
function doFirstThing(){ return Promise.resolve(1); }
function doSecondThing(res){ return Promise.resolve(res + 1); }
function doThirdThing(res){ return Promise.resolve(res + 2); }
function lastThing(res){ console.log("result:", res); }
var fnlist = [ doFirstThing, doSecondThing, doThirdThing, lastThing];
// Execute a list of Promise return functions in series
function pseries(list) {
var p = Promise.resolve();
return list.reduce(function(pacc, fn) {
return pacc = pacc.then(fn);
}, p);
}
pseries(fnlist);
// result: 4
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