String.prototype.trim polyfill for 140byt.es

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(){
  /* Rules:                      
  (1) anonymous function     // make sure
  (2) may be self-executing  // to annotate
  (3) <=140 bytes            // your code
  (4) no globals             // so everyone
  (5) MIT license            // can learn
  (6) have a good time!      // from it!
*/}

index.js

function(){/*Rules: (1) anonymous function (2) may be self-executing (3) <=140 bytes (4) no globals (5) MIT license (6) have a good time!*/}

LICENSE.txt

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

 Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

 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": "140bytes",

  // [OPTIONAL] A description of your library, phrased as a verb predicate.
  // The gist description is used by default.
  "description": "Explain the 140byt.es rules.",

  // [OPTIONAL] Up to 5 keywords used for indexing.
  "keywords": [
    "140bytes",
    "master",
    "rules" 
  ]
}

The whitespace included in the character class \s is inconsistent across browsers. Instead a manual check of the required whitespace - is - best.
Also browsers like Chrome have a bug where String.prototype.trim = ''.trim will cause String#trim to become enumerable.

Fixing the enumerable issue. I'm not sure yet if I can tackle making it any more robust as the character class alone to resolve the whitespace issue looks to be over 140 characters. I will research.

subzey commented in another gist of mine that the following regex might work: ^[\s\uFEFF]+|[\s\uFEFF]+$. I will use it unless you think there is something non-compliant with it.

Did you happen to find any issues with the regex you implemented?

return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');