On Fri, 27 Sep 2002, Anurag K. Singh wrote:
> use or instead of && like :
>
> if (($ARGV[0] eq "") or ($ARGV[1] eq "") or ($ARGV[2] eq "")) {
> print "You must give me 3 parameters\n";
> exit
> }
>
> It works for me.
1) If I were to use your program how would I pass an empty string as an
argument. For e.g. let's call your program anurag.pl
If I make a call like anurag.pl "arg1" "" "arg3" it will print the
error and exit.
2) Exit with a non-zero value on an error condition. By default exit
exits with 0 (perldoc -f exit)
3) If you had turned warnings on in your program this will throw out a
message like this "Use of uninitialized value...." if $ARGV[0] or
$ARGV[1] or $ARGV[2] were not defined (note: not the same as "").
The right way to do this is
if (@ARGV != 3) {
print "Usage: <progname> <arg1> <arg2> <arg3>\n";
exit 1;
}
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