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Re^2: I want you to convince me to learn Perl

by Jenda (Abbot)
on Sep 25, 2013 at 15:04 UTC ( #1055700=note: print w/replies, xml ) Need Help??


in reply to Re: I want you to convince me to learn Perl
in thread I want you to convince me to learn Perl

Well ... the speed ... it's both right and wrong. If you translate some code statement-for-statement from C to Perl, then Perl will lose hands down. For a large group of tasks a well written Perl script will beat anything you could write in C in reasonable time to pulp. The built-ins of Perl had been hand-optimized for years so if you can implement the task by a few calls to those built-ins, your program will finish sooner than if you attempt to reimplement them in your own code. In most cases it simply doesn't matter though.

Jenda
Enoch was right!
Enjoy the last years of Rome.

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[Corion]: I spent parts of yesterday digging into Filter::Simple to make it not change the line numbers of unfiltered code, but I think I need regex help (which will come in a SoPW I guess). I tried @lines = /((?:"...."|[^" \n]+)\n)/gs, but that matched on...
[Corion]: ... foo "\0\0\0\n" bar\n by matching the first \n instead of matching the four-bytes-in- double-quotes part
[Corion]: ... and I still don't understand why ;)
[Corion]: This is because Filter::Simple does some string-trickery, replacing all string literals with "quoted packed numbers"
[Corion]: I fear this might be a bug in the RE engine, but if it is a bug, even fixing won't help me because I need Filter::Simple for Filter::signatures , which provides signatures as a backwards compatibility feature for Perl <5.22 - and these ...
[Corion]: ... won't get a fix anyway ;) My plan B is to encode the string placeholders avoiding \r and \n

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