So

The most straightforward co-routine library for Node.JS ever. Provides predictable composable async/await from C#5.0 style co-routines for everyday use since you can live in a Harmony.

Inspired by @ForbesLindesay's great presentation: http://pag.forbeslindesay.co.uk/#/ and @visionmedia co. As of co-4.0 that was rewritten to use promises, so-1.0 can be compared with co.wrap and represents its more light and strict version.

Platform Compatibility

When using node 0.11.x or greater, you must use the --harmony-generators flag or just --harmony to get access to generators.

When using node 0.10.x and lower or browsers without generator support, you must use gnode and/or regenerator.

Also as of so-1.0 you should ensure existence of Promise either by using --harmony or any available polyfill.

Installation

$ npm install so

Usage

var so = require('so');
var fs = require('then-fs');

var readJSON = so(function*(path){
  return JSON.parse(yield fs.readFile(path, 'utf8'));
});

var main = so(function*(){
  var a = yield readJSON('a.json');
  var b = yield readJSON('b.json');
  console.log({a:a, b:b});
});

main().catch(function(e){
  console.log(e.stack || e.message || e);
});

or for CoffeeScript

so = require 'so'
fs = require 'then-fs'

readJSON = so (path) ->
  JSON.parse yield fs.readFile path, 'utf8'

main = so ->
  a = yield readJSON 'a.json'
  b = yield readJSON 'b.json'
  console.log {a, b}

main().catch (e) ->
  console.log e.stack ? e.message ? e