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Re: Is there ever a time Perl is the wrong choice?

by FoxtrotUniform (Prior)
on Feb 06, 2003 at 19:29 UTC ( #233240=note: print w/replies, xml ) Need Help??

in reply to Is there ever a time Perl is the wrong choice?

Here's a rather pathological example I came across recently:

The problem was to build a minimum-change generator for k-permutations, so that each k-permutation differed in exactly one element from its predecessor. (This is sort of like a successor function, but you have more history around so it's a bit easier.) This "reduces" (heh) to finding a Hamiltonian cycle in a graph of all k-perms of the set you're given, where two vertices are adjacent if they differ by just one element. (How's that for a disgusting problem?)

A friend of mine wrote about thirty lines of Prolog to simulate such an algorithm. I would not want to try that in Perl. (Yes, you could probably do it with a particularly gnarly regex, or an explicit backtracking approach, but I bet it'd take you more than thirty lines.)

To me, in general, it's all about the builtins. For almost all of what I do, Perl has the right builtins. Sometimes Common LISP is a better choice. Sometimes Matlab is a better choice (in particular, for linear algebra. Sure, you can grab the right module off of CPAN, but if you use Matlab you don't have to).

F o x t r o t U n i f o r m
Found a typo in this node? /msg me
The hell with paco, vote for Erudil!

  • Comment on Re: Is there ever a time Perl is the wrong choice?

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Re^2: Is there ever a time Perl is the wrong choice?
by etj (Chaplain) on Jun 26, 2022 at 15:18 UTC
    Any time you want to use MATLAB, it might be valuable to also check out PDL::LinearAlgebra (MATLAB-ish Perl wrappings around PDL wrappings of ultra-fast LAPACK routines).

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