Date: Thu, 27 Apr 2006 16:58:28 -0700 From: Gary Kline <kline@tao.thought.org> To: Arne Skjaerholt <arnsholt@broadpark.no> Cc: freebsd-questions@freebsd.org Subject: Re: scripting languages... Message-ID: <20060427235828.GD2601@thought.org> In-Reply-To: <1146188104.7085.8.camel@bursar> References: <20060427024158.GA71123@thought.org> <20060427031043.GA69851@gothmog.pc> <20060427214854.GA2601@thought.org> <1146188104.7085.8.camel@bursar>
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On Fri, Apr 28, 2006 at 03:35:03AM +0200, Arne Skjaerholt wrote: > On Thu, 2006-04-27 at 14:48 -0700, Gary Kline wrote: > > I like the C "main(int argc, char *argv[])" intro or > > starting-point. main() has to be there in C. Given argc > > and argv, I can hack away freely. /bin/sh, /bin/csh, > > and perl's lack if arg[cv] means that I have to think about > > how-to grab the arguments to a binary. Script ot ./a.out. > Getting at argv/argc is actually pretty simple in Perl. The global array > @ARGV contains the arguments given on the command-line, but not the name > of the file (this datum is contained in $0). Therefore your argv[1] in C > is $ARGV[0] in Perl. The number of command-line arguments can be > obtained in two ways, either you interpret the array in a scalar context > and get its length: ``my $argc = scalar @ARGV'' or you use the last > index of the array and add one: ``my $argc = $#ARGV + 1''. Of course, in > most cases you'll just want to loop over the command-line args, so a > foreach loop should suffice, or of course one of the Getopt (Getopt::Std > or Getopt::Long in most cases) modules. > So, could I say: my $argc = $#ARGV+1; $count = 0; while ($argc--) { if (! (checkErr($ARGV[$count], $count))) { printf("Processing %s\n", $ARGV[$count]); doWhatever($ARGV[$count]); } $count++; } or something close-to!? If Larry Wall had only made perl a bit closer to C, I probably would've used it more. anyway, thanks! gary > Your neighbourhood Perl afficionado, > Arne > :wq > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" -- Gary Kline kline@thought.org www.thought.org Public service Unix
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