tamaguchi has asked for the wisdom of the Perl Monks concerning the following question:
#!/usr/bin/perl -w
I have noticed the folling: instead of using (scalar(@arr)) to indicate the number of ellements in an array it is possble to use $#arr. It seems that $# is a value 1 less then the scalar value.
instead of writing:@arr=('A', 'B', 'C', 'D', 'E', 'F', 'G');
..one could make things little easier by writing:for(my $i=0; $i<(scalar(@arr)); $i++) {print"$i $arr[$i]\n";}
What is this $# variable really, and is it correct to use it as shown above. I mean could it cause any problems if one uses $#x instead of scalar(x)? What is thisfor(my $i=0; $i<=$#arr; $i++) {print"$i $arr[$i]\n\n";}
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Re: $# -variable?
by GrandFather (Saint) on Jul 27, 2006 at 09:04 UTC | |
Re: $# -variable?
by davorg (Chancellor) on Jul 27, 2006 at 09:05 UTC | |
Re: $# -variable?
by gellyfish (Monsignor) on Jul 27, 2006 at 09:10 UTC | |
Re: $# -variable?
by planetscape (Chancellor) on Jul 27, 2006 at 10:27 UTC | |
Re: $# -variable?
by ikegami (Patriarch) on Jul 27, 2006 at 15:52 UTC | |
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