...must...resist...urge...to...post...symbolic...reference...example...
Whew! I wrote the symbolic reference example, but didn't post it. Here are a couple alternatives:
You can use brute force:
while (my $inp = <>) {
$inp =~ s/^\s*(\w+)\s*$/$1/;
if ($inp eq 'AB') { AB() }
elsif ($inp eq 'CD') { CD() }
... etc ...
else {
print "Command unknown: '$inp'\n";
}
}
If you're using a more modern perl the brute force method could look like:
while (my $inp = <>) {
$inp =~ s/^\s*(\w+)\s*$/$1/;
given ($inp) {
when ('AB') { AB() }
when ('CD') { CD() }
... etc ...
default {
print "Command unknown: '$inp'\n";
}
}
However, a better method is a dispatch table. There's a little more setup work at the beginning, but as you add new command handlers, you'll find it's easier to maintain:
my %dispatch_table = (
AB => \&AB,
CD => \&CD,
... etc ...
);
while (my $inp = <>) {
$inp =~ s/^\s*(\w+)\s*$/$1/;
if (exists $dispatch_table{$inp}) {
&{$dispatch_table{$inp}}();
}
else {
print "Command unknown: '$inp'\n";
}
}
...roboticus
When your only tool is a hammer, all problems look like your thumb.
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