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crm114: Controllable Regex Mutilator and Spam Filter

Do you already know crm114? Taking quotes of the crm114 book:

What is this? Some kind of grep bitten by a radioactive spider?
— apocryphal

­CRM114 isn’t ugly like PERL. It’s a whole different kind of ugly.
— John Bowker

Want to get a calculator using crm114? No problem:

% cat > calc << EOF
{
  eval (:_dw:) /:@: :*:_dw: :/
  output /:*:_dw: \\n/
}
EOF
% crm calc
(42*23)+(11/3.14) # press return and EOF (ctrl-d) at this stage and get the result:
 969.50318

There’s a crm114 book (PDF, 283 pages!) available for free download. Just apt-get crm114, the installed-size is less than 1MB. Thanks Maddi for pointing me to it again, it was on my todolist for ages. ;)

This entry was posted by mika on Thursday, April 5th, 2007 at 19:36 and is filed under Computer, Debian, English, Links. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

One Response to “crm114: Controllable Regex Mutilator and Spam Filter”

  1. Crash Says:
    April 7th, 2007 at 20:53

    You can also get it to run without ctrl-D, in a loop. Here, we see if the
    input contained at least one character – if the input was empty, we exit.

    Note also that if you invoke any CRM114 program with -q 1 (or start a math
    expression with a capital R) all the math turns to RPN notation.

    Long Live the HP-45 !! :-)

    # crm114 program to be a desk calculator
    # wsy@merl.com – free to use for any purpose.
    window
    output /Enter expressions. Hit return to evaluate, empty line to exit\n /
    {
    isolate (:y:)
    input (:x:)
    match [:x:] /./
    eval (:y:) /:@::*:x::/
    output /:*:y:\n /
    liaf
    }

    – Bill Yerazunis