In the message dated: Fri, 20 Dec 2013 11:45:14 -0500,
The pithy ruminations from Brandon Allbery on
<Re: [lopsa-tech] A PERL question> were:
=> On Fri, Dec 20, 2013 at 11:35 AM, john boris <[email protected]> wrote:
=>
=> > The perl script is called like this from another shell script that does
=> > some worlk
=> >
=> > perl weekdays.pl $school
=> >
=>
=> Change this to
=>
=> perl weekdays.pl "$school"
=>
[PEDANTIC HAT ON]
I'd suggest:
weekdays.pl -s "$school"
and ideally also accept:
weekdays.pl --school "$school"
weekdays.pl --school="$school"
Except for an input filename as the final command-line argument, I'm
strongly opposed to any 'bare' argument (not preceeded by a flag). Using
flags can also make the command-line parsing easier, through the use of
'getopts', or by something like:
#### horrible, untested, pseudo-code follows ###
if ( $ARGV[$i] eq "-s" || $ARGV[$i] =~ /^--school$/ )
{
$i++;
while ( ! $ARGV[$i] =~ /^-/ )
{
$school=$school . " " . $ARGV[$i];
$i++;
}
}
else
{
if ( $ARGV[$i] =~ /^--school=/ )
{
($school,$ARGV[$i])=~s/^.*=//;
}
}
I've seen way too much legacy code that has things like:
program.pl xsize ysize parm1 parm2 zsize input output
The lack of flags (option names) makes usage and maintenance difficult
-- particularly months & years later when the specific meaning given to
the _position_ of each argument has been forgotten.
[PEDANTIC HAT OFF]
Mark
=> --
=> brandon s allbery kf8nh sine nomine associates
=> [email protected] [email protected]
=> unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
=>
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