jussi-kalliokoskiBrainScript
BrainScript is a scripting language that is a subset of JavaScript and inspired by Urban Müller's brainfuck. Valid BrainScript is always also (syntax-wise) valid JavaScript, so all rules that apply to JavaScript, apply to BrainScript. BrainScript – however – has some extra rules of its own, BrainScript does not support String literals, comments, whitespace (except \n), Numbers or any use of alphanumerals. Only dollar ($) and underscore (_) characters are allowed to be used as identifiers.
Hello world in BrainScript
Pops out a modal box saying 'Hello world.'
_=+!![];__=_+_;$_$=[][$=[![]]+[!![]]+{}
,$[_+__]+$[(__<<__)+__]+$[(__<<_)+__]+$
[(__<<_)+_]],$+=$_$,$_$=$_$(),$+=$_$+(+
{})+(_/(+!{})),$+=($[$$=$[(__<<_<<__)-
__]+$[(__<<__)+__]+$[(__<<__<<__)-(__
<<_)-__]+$[__+_]+$[(__<<_)+_]+$[(__<<_)
+__]+$[(__<<__)-_]+$[(__<<_<<__)-__]+$[
(__<<_)+_]+$[(__<<__)+__]+$[(__<<_)+__]
])+(+!![])[$$],$+=($_=$_$[$[(__<<__<<__
<<_)-(__*__)-(__<<__)]+$[(__<<__)+__]+$
[(__<<_<<__)-__]+$[(__<<__)-_]+$[(__<<
__<<__<<__)+__*__]+$[__<<_]+$[(__<<__<<
__)-(__<<_)-__]+$[(__<<_)+_]])+(_/__),
$_$[$[_]+$[__]+$[__<<_]+$[(__<<_)+__]+$
[(__<<_)+_]]($[(__<<__<<__<<__)+(__<<__
<<__)+(__<<_)]+$[__<<_]+$[__]+$[__]+$[(
__<<__)+__]+$[__<<__<<_]+$[(__<<__<<__
<<_)+(__<<__)+_]+$[(__<<__)+__]+$[(__<<
_)+__]+$[__]+$[(__<<__<<__<<_)-(__*__)-
(__<<__)]+$[(__<<__<<__<<__)+(__<<__<<
__)+(__<<__<<_)+__]);
The JavaScript equivalent would be
alert('Hello world.');
Do note that the example will only work in Chrome and older versions of Firefox.
Compiling
The compiler folder inludes a JavaScript -> BrainScript compiler for whatever purposes you may have for such a thing. Currently known issues are bloated size (this is not noticeable when gzipped) and memory usage. Also, it introduces some public variables, but just put all your javascript in a single file and compile, and you should be all right!
Like any credible language, BrainScript also features a compiler written in BrainScript, you can find it in compiler/self-compiler.html .
The proper MIME type for BrainScript is text/x.brain+javascript. It however works with text/javascript as well.
Pros
- Easy to understand, simple syntax. Should be familiar to most of the people, as it's the same as in the world's most popular programming language.
- Very high gzip compression ratio (usually around 98%).
- Hard to do dangerous or 'evil' things with.
- There's nothing to get in the way of you and the desired result, when there are no keywords, literal control structures or other useless things.
- Everything you could do with JavaScript, you should (be able to) do with BrainScript.
- Makes debugging more enjoyable.
- Allows you to exceed the charset of your BS file.
- The syntax is understood by all browsers that support JavaScript.
Deltas
- Writing X-Browser compatible code isn't always – well... – possible. Implementations are getting better though.
- Introduces some "global pollution".
- The current compiler introduces some (massive) memory leaks to your code. Working on it.
- Firefox 5+ doesn't support BrainScript. Older versions, however, do.
Other
- CodeExpression.js supports BrainScript parsing.
- brainfuck on esolangs.org.
- JavaScript specification or EcmaScript 5th edition (There's some dispute whether or not BrainScript is compatible with ES5)