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Re: Perl Idioms Explained - && and || "Short Circuit" operators

by Abigail-II (Bishop)
on Oct 22, 2003 at 21:31 UTC ( #301380=note: print w/replies, xml ) Need Help??

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  1. or download this
    ---------------------------------------------------------
    $this && $that   |    If $this is true, and $that is true
    ...
                     |    If $that evaluates true, return 
                     |    the value of $that.
    ---------------------------------------------------------
    
  2. or download this
    ---------------------------------------------------------
    $this && $that   |    If $this is true, return $that,          
    ...
    $this || $that   |    If $this is true, return $this,
                     |    else return $that.
    ---------------------------------------------------------
    

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[Discipulus]: get them all printed on screen
Discipulus ;=)
[shmem]: silly question, silly answer:
[Discipulus]: i know, i know..
[shmem]: man perlfunc |perl -nle '$ok++ if /Alphabetical Listing of Perl Functions/;if($ok ){$s{$1}++if /^ (\w+)/}}{for(keys %s){$f="prototype \\\&CORE::$_"; eval"$f"||delete $CORE::{$_}}print for sort keys%CORE::'
[shmem]: well, there are some builtins which don't have a prototype...
[Discipulus]: eh eh.. i was looking in toke.c but dunno if is already used
[shmem]: oh the whitespace in the regex got condensed, meh

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