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I'm well aware of js.next/harmony/whateveryouwannacallit. Come back to me in 10 years when it's implemented everywhere and everyone that was on an old version of browser X has upgraded to one with those features.

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Or use a tool that compiles js.next to lowest-common-denominator-javascript.

http://code.google.com/p/traceur-compiler/

Yay a dynamic language with a compiler step.

Python has a compiler step - source files (.py) are compiled into bytecode (.pyc) files. It just happens transparently. Doesn't make the language less dynamic IMHO.

Smalltalk, one of the seminal, dynamic languages has a compilation step. It happens inline everytime you save a method.

Lisp can both be dynamic and compiled.

Many dynamic languages---Python, Ruby, et all--on JVM or CLR have a compilation step. They compile to byte code that the VM then runs.

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