thomas895++ implies something even more important in Re^3: Argument for Perl ( again and again ):

You should know your tools, their strengths, and at least as important, their weaknesses. This is so natural to me (coming from a family that has a lot of qualified craftsmen) that I completely forgot to write it down explicitly. Only if you know your tools and your own skills and limits, you can make a reasonable choice. If not, things will end as explained in the current sig of roboticus: "When your only tool is a hammer, all problems look like your thumb."

(I'm currently trying to add Lua to my set of tools, but too many problems still look like my thumb when I use Lua.)

Alexander