To simplify the given example and keep to the "one entry point one exit point to and from a subroutine" style, I would only add an else to the subroutines if statement Check the following:
#!/usr/bin/perl -w
use strict;
sub test {
my ($param) = @_;
if ($param =~ /e/) {
print "e found.\n";
}
else {
print "No e found.\n";
}
};
&test( "test" );
&test( "toast" );
I have also tried the following in case there are more than two options ie (more than true or false). I have only one entry point in a subroutine and one exit from that routine. It does mean though that I have to test the return value of the subroutine. Using the same example as above I could expand the tests (if statements) and the value that is returned, and then test these values later. E.g.
#!/usr/bin/perl -w
use strict;
sub test {
my ($param) = @_;
my $rc = 0;
if ($param =~ /e/) {
$rc = 1;
}
elsif ($param =~ /a/) {
$rc = 2;
}
return($rc);
};
my @tsts = qw/ test toast kitty /;
foreach my $word (@tsts) {
my $ret_val = &test($word);
if ($ret_val == 1) {
print "E found\n";
}
elsif ($ret_val == 2) {
print "A found\n";
}
else {
print "A or E NOT found\n";
}
}
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