Iron Languages - NYC CodeCamp 2/19/2011

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IRON<br />Languages<br />Jimmy Schementi<br />jschementi@lab49.com<br />jimmy.schementi.com<br />Dynamic Languages for the...

JavaScript<br />Tcl<br />MATLAB<br />Ruby<br />Smalltalk<br />

xkcd.com<br />

Executes many common behaviors, at runtime, that other languages might perform during compilation, if at all.<br />

Most are dynamically-typed, but not all.<br />Dynamic Typing<br />The majority of its type checking is performed at run-ti...

why?<br />

Simple enough for non-programmers, capable enough for programmers<br />print File.read("foo.txt")<br />name = ...

Scripting <br />Languages<br />Dynamic <br />Languages<br />

“Python, like many good technologies, soon spreads virally throughout your development team and finds its way into all sor...

http://www.unreal.com/media/banners/kismet1.jpg<br />

Interactive<br />>>> 2 + 2<br />4<br />

.NET?<br />

Dynamic Languages on .NET<br />Consumers<br />

Keep it Simple<br />Python<br />Ruby<br />def fact n<br /> return 1 if n == 0<br /> n * fact(n-1)<br />end<br />puts...

Ecosystem exchange<br />.NET gets Python and Ruby world, and Ruby/Python gets .NET world<br />Ruby on Rails/Django/RSpec/e...

Scripting the .NET framework<br />Driving .NET code from scripts<br />Domain-specific languages<br />Compiler Geek-Out<br ...

Demo<br />Scripting .NET<br />

rb> puts 2 + 2<br /> 4<br /># => nil<br />

traditional compiler front-end<br />Scan<br />Token stream<br />def add():<br /> return 2 + a<br />return<br />2<br />+<b...

IronPython: <br />Hand-written LL(1) parser<br />IronRuby: <br />Gardens Point Parser Generator LALR(1)<br />

compiler back-end on CLR<br />Generate IL<br />Syntax Tree<br />ldc.i4.2 // load 2<br />box [mscorlib]System.Int32<br />...

compiler back-end on DLR<br />Linq Expression<br />Tree<br />ToExpression Tree<br />Return <br />Syntax Tree<br />return <...

puts 2 + 2 -> Expression tree <br />.Dynamic puts(.S,1) @1(<br /> $#scope,<br />$#self,<br />.Call IronRuby.Runtime.Ru...

IronRuby.Runtime.RubyScriptCode<br />internalstaticDelegate/*!*/CompileLambda(<br />LambdaExpression/*!*/ lambda, <br />bo...

static vs. dynamic dispatch<br />MethodCallExpression<br />Method : {RuntimeMethodInfo<br /> {Name: "Print...

public static object Handle (<br /> object[] args, DynamicSite<object, object, object> site1,<br /> object obj1, object ob...

print yo(1)<br />

public static object Handle (<br /> object[] args, DynamicSite<object, object, object> site1,<br /> object obj1, object ob...

System.Dynamic.DynamicObject<br />

Dynamic Language Runtime<br />Infrastructure for creating languages<br />Focus on dynamic compiler back-end.<br />Dynamic...

Hosting<br />Hosting<br />ScriptRuntime<br />ScriptScope<br />ScriptEngine<br />ScriptSource<br />

var engine = Ruby.CreateEngine(); engine.Execute("puts 2 + 2");<br />

var engine = Python.CreateEngine(); dynamicscope = engine.CreateScope(); scope.page= this; engine.Execute("page.Message.Te...

var runtime = ScriptRuntime.CreateFromConfiguration(); var engine = ScriptEngine.CreateEngine("IronRuby"); dynamic scope =...

require 'IronPython'require 'Microsoft.Scripting'include Microsoft::Scripting::Hostinginclude IronPython::Hostingpython = ...

# foo.py:class Foo(object): def bar(self): print 'Look ma, white-space-sensitivity!' # bar.rb:foo_module = IronRuby.re...

Demo<br />Hosting<br />

Hosting best-practices<br />Store scripts where you want with PlatformAdaptationLayer<br />Makes script file-system operat...

Project Status<br />IronRubyis working towards 1.9 compat – Rails 3, FFI, static type system integration<br />IronPythonwo...

How you can participate<br />Use it at your company, and tell us about it!<br />Ask the mailing lists and stackoverflow f...

ironruby.netIronRuby website & download<br />ironpython.netIronPython website & downloaddlr.codeplex.comDLR documentation ...

?<br />

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