Trying some examples from http://raganwald.com/2013/04/19/another-look-at-sequence.html with allong.es

1.js

var allong = require('allong.es');
var ƒ = allong.es;
var fs = require('fs');

ƒ.sequence(ƒ.sequence.Callback,
  ƒ.callLeft(fs.mkdir, './hello', 0777),
  ƒ.callLeft(fs.writeFile, './hello/world.txt', 'Hello!'),
  function (callback) { fs.readFile('./hello/world.txt', 'UTF-8', callback); }
)()(function(err, data) {
  if (err) throw err;
  console.log('DATA:', data);
})
/*
TypeError: undefined is not a function
    at repl:5:4
    at REPLServer.self.eval (repl.js:110:21)
    at Interface.<anonymous> (repl.js:239:12)
    at Interface.EventEmitter.emit (events.js:95:17)
    at Interface._onLine (readline.js:202:10)
    at Interface._line (readline.js:531:8)
    at Interface._ttyWrite (readline.js:760:14)
    at ReadStream.onkeypress (readline.js:99:10)
    at ReadStream.EventEmitter.emit (events.js:98:17)
    at emitKey (readline.js:1095:12)
> fs: missing callback Error: ENOENT, open './hello/world.txt'
*/

2.js

var allong = require('allong.es');
var ƒ = allong.es;
var fs = require('fs');

ƒ.pipeline(ƒ.sequence.Callback,
  ƒ.callLeft(fs.mkdir, './hello', 0777),
  ƒ.callLeft(fs.writeFile, './hello/world.txt', 'Hello!'),
  function (callback) { fs.readFile('./hello/world.txt', 'UTF-8', callback); }
)()(function(err, data) {
  if (err) throw err;
  console.log('DATA:', data);
})

/*
TypeError: Property '3' of object function (callback) { fs.readFile('./hello/world.txt', 'UTF-8', callback); },function binary(a, b) {
      if (a == null) {
        return binary;
      }
      else if (b == null) {
        return unary(function (b) { return fn(a, b); });
      }
      else return fn(a, b);
    },function unary(a) {
      if (a == null) {
        return unary;
      }
      else return fn(a);
    }, is not a function
    at /Users/jschulz/node_modules/allong.es/lib/allong.es.js:444:25
    at repl:5:2
    at REPLServer.self.eval (repl.js:110:21)
    at Interface.<anonymous> (repl.js:239:12)
    at Interface.EventEmitter.emit (events.js:95:17)
    at Interface._onLine (readline.js:202:10)
    at Interface._line (readline.js:531:8)
    at Interface._ttyWrite (readline.js:760:14)
    at ReadStream.onkeypress (readline.js:99:10)
    at ReadStream.EventEmitter.emit (events.js:98:17)
  */

I have duplicated the issue, but do not have time to address it today. So... I've taken the blog post down until it and/or allong.es can be corrected. Thanks for the heads up that it is not working!

See: raganwald/allong.es#20