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Re^2: How to access each char in a string most quickly?

by citromatik (Curate)
on Jul 03, 2009 at 08:14 UTC ( #776981=note: print w/replies, xml ) Need Help??

in reply to Re: How to access each char in a string most quickly?
in thread How to access each char in a string most quickly?

{ my @string='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +aaaaaaaaaaaaaaaaaaaaaaaaaaaa'; shift @string;{} }

This is nonsense, did you mean?

my @string = ('a')x50; while (shift @string){ ; }


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Re^3: How to access each char in a string most quickly?
by Marshall (Abbot) on Jul 03, 2009 at 08:24 UTC
    I am striking this whole post as this didn't work out very well. Somehow the main point just got completely lost. Perl is not a great character by character language and its just not the right way to use Perl, but somehow I wasn't able to get this across. Oooops. Yes. You are correct!!.

    This whole thread is a bit weird as the idea of processing a char at a time is sort of "anti-Perl".

     The code should be: while (my $var =shift @string){} But that makes no difference.

    Rate Split Substr pre_splitted Shift Split 8851/s -- -73% -94% -98% Substr 32226/s 264% -- -80% -95% pre_splitted 158028/s 1685% 390% -- -73% Shift 587199/s 6534% 1722% 272% --

    The main point is that shift() is very, very fast, but Perl will work with regex even faster. I mean so what do you do with these chars that were read individually?

    Update: Well Darn! the code above is not right, and I think I could write some faster "get a character" code, but that is just not the point at all!

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[Corion]: perldigious: That seems to be more the export and likely it's the recipients of that export that like the titles changes
[Corion]: ... "changed"
[Corion]: I usually expect fixed header names, but am sometimes lenient in the order of columns. But changing the report titles often sounds to me as if you are not the sole consument of the export ;)
[shmem]: perldigious: as always - if it ain't broke, don't fix it. Ther must be a very compelling reason for changing column names in a database. Those are rare.
[Corion]: If you have whitespace in the column names in the database, whap the DBAs ;)

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