Providing a robust, maintainable, and interactive interface to your C/C++ application can be a challenge, but I’ve found that a combination of SWIG, Java, and JRuby (or Jython if you prefer) makes for a very powerful combination.
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In Creating a Binary File Using a Ruby DSL I did a very small example of using a ruby DSL to generate complex binary files without having to use C or a hexeditor. I’ve beefed it up significantly since then so here is the updated version of h2b.irb.
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There are other ways of doing this, but I thought it would be fun to write a command-line xpath script in ruby using rexml. (full working example here)
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So I used ruby to convert a simple hex string into a binary file in Converting hex to Binary in 4 Languages. Today I was trying to create a mixed ascii/binary file at work and created a little Domain Specific Language that has good possibilities.

NOTE: There is an expanded version of this script here: A Better Binary File Generator DSL in Ruby
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The venerable C switch statement keeps showing up in other languages presumably because the people who write new languages are familiar with C and don’t really think about it.
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My favorite example of a DSL is the latest jmock API just because you really have to fight the language. Fortunately Ruby makes things easier. I’ve been thinking a shell in ruby might be a nice change of pace so this is a small example of how to go about implementing one.

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I thought I’d continue my series of writing the same application in multiple languages by trying to clone the wonderful network tool: netcat. For the first installation I’m going to try it in Ruby.

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I’ve been playing around with some scripting languages recently so I thought I’d do a small example in a few different languages for laughs.
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