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Executing data based on command line arguments

by iphone (Beadle)
on Dec 15, 2010 at 04:11 UTC ( [id://877199]=perlquestion: print w/replies, xml ) Need Help??

iphone has asked for the wisdom of the Perl Monks concerning the following question:

I have a block of statements that need to be executed everytime in my code,but when a command line option,say "c" is passed,this block of statements need to be executed based on an "if" condition,is there a way I can achieve this without doing "if else"?

if (grep( /$number/, @list))# this if should come into the picture onl +y when command line option c is given, { #Block of statements... }

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Re: Executing data based on command line arguments
by ELISHEVA (Prior) on Dec 15, 2010 at 07:35 UTC

    When you find yourself avoiding if...elsif...else because you have group of statements or conditions that you don't want to repeat in two places, that is usually a good sign that those statements/conditions should be wrapped up in a subroutine. Is there any reason why you have avoiding doing this so far?

Re: Executing data based on command line arguments
by PeterPeiGuo (Hermit) on Dec 15, 2010 at 04:15 UTC

    Assume there is nothing there to complicate the matter, the following will do:

    if (c is given && your grep) { ... }

    Peter (Guo) Pei

Re: Executing data based on command line arguments
by eff_i_g (Curate) on Dec 15, 2010 at 04:33 UTC

      I know how to check command line options,let me be explicit in my query again.Lets use the below sample code. In the below code

      1."print $line"should get executed no matter what (even if the option is not c),but 2. when option is "c"am checking for line in @array and then printing $line.

      if ($options(C) && grep /line/,@array) { print $line; }

      I know we can do the following,but how do I satisfy both conditions without using if-else,as an example I gave print $line,there are many more instructions in my script which i dont want to repeat

      if ($options(C) && grep /line/,@array) { print $line; } else #when option "c" is not given { print $line; }
        if ($options{foo} and satisfy_bar()) { poit(); } if (not $options{foo}) { narf(); }
        I think you can get your desired result by doing something like:
        if( ! $option{c} || grep /line/, @array ) { print $line; }

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