pub/sub custom events

README.md

140byt.es

A tweet-sized, fork-to-play, community-curated collection of JavaScript.

How to play

1. Click the button above to fork this gist.
2. Modify all the files to according to the rules below.
3. Save your entry and tweet it up!

Keep in mind that thanks to the awesome sensibilities of the GitHub team, gists are just repos. So feel free to clone yours and work locally for a more comfortable environment, and to allow commit messages.

Rules

All entries must exist in an index.js file, whose contents are

1. an assignable, valid Javascript expression that
2. contains no more than 140 bytes, and
3. does not leak to the global scope.

All entries must also be licensed under the WTFPL or equally permissive license.

For more information

The 140byt.es site hasn't launched yet, but for now follow @140bytes on Twitter.

To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.

140byt.es is brought to you by Jed Schmidt. It was inspired by work from Thomas Fuchs and Dustin Diaz.

annotated.js

(function (_) { // _ is equal to the empty object passed as argoument to the IIFE
    return { //public methods pub & sub:
        pub: function (a, b, c, d) { //pub takes 2 params: a string for the event name an optional object to be passed to the function subscribed
            for (d = -1, c = [].concat(_[a]); c[++d];) c[d](b) //loop on function registered on that event ed executing each one passing the optional object
        }, //won't break if no subscription on that event
        sub: function (a, b) { //sub takes 2 params: a string for the event name and a function to be executed when the event is published
            (_[a] || (_[a] = [])).push(b) //push the function to the array tied to that event (create the array if does not exist)
        }
    }
})({})

//this is useful to create an event driven environment for your libs and can be used assigning the IIFE to a variable (let's assume that is called eventMan)
//eventMan.sub("myEvent", function(a){alert(a.message)});
//eventMan.pub("myEvent", {message:'myEvent has been triggered'});

index.js

(function(_){return{pub:function(a,b,c,d){for(d=-1,c=[].concat(_[a]);c[++d];)c[d](b)},sub:function(a,b){(_[a]||(_[a]=[])).push(b)}}})({})

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 cedmax <http://github.com/cedmax>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  // [REQUIRED] A name for your library.
  // This must match /^[a-z_]\w*$/i
  "name": "eventDriver",

  // [OPTIONAL] A description of your library, phrased as a verb predicate.
  // The gist description is used by default.
  "description": "a simple custom event manager: allows to subscribe and publish events and to create an event driven environment",

  // [OPTIONAL] Up to 5 keywords used for indexing.
  "keywords": [
    "events",
    "pubsub",
    "pattern",
    "140bytes"
  ]
}