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Re^2: Example 1

by Mabooka-Mabooka (Sexton)
on Apr 17, 2005 at 04:03 UTC ( #448570=note: print w/replies, xml ) Need Help??


in reply to Re: Common Beginner Mistakes
in thread Common Beginner Mistakes

sub()

This one was the reason I came here, details are in the Seekers of Perl Wisdom thread. (THANKS again BUU!!!).
In short: if you write
sub foo() { ... },
you're in trouble.

Why people do this?

Mainly (I think) because it's counter-intuitive to do otherwise. I personally automatically without thinking add "()" to a function declaration. Besides, I call it as "foo()".

Another reasons: Perl allows you to do that. What I encountered is, depending on where one calls sush sub, -- before or after it's defInition(!!!), there'll be a syntax error or no errors. (In fact, after fixing my small problem today, I looked closer at my colleague's module and found several dozen subs declared like this. No complaints from Perl).

Solution

Read all books, spend several years practicing. I leave to the experts the explanation of what "sub name()" really means (it's an array of subs or smth. like that I guess).
-- Find out.

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[Corion]: Cosmic37: No, but maybe $mydt doesn't contain what you think it does, or it contains characters that are special in a regular expression? Try if( $line =~ /\Q$mydt\E/) { ... for a literal match
[Cosmic37]: I mean string grrr
[Corion]: Maybe add an else branch in which you print what the values of $line and $mydt are?
[Cosmic37]: ah thank you I will try
[Cosmic37]: you are right $mydt did not contain what I expected... :-D I will now think :-D
[Cosmic37]: crunch...grind... whirr...gnashing metal crunching cogs...

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