Re: How do I use a block as an ‘or’ clause instead of a simple die?

[linuxer]

if ( !$ftp->put($myfile) ) {
  # do 
  # your excessive exercise
  # her
}

[ikegami]

The limit of if is encountered if you declare a variable.

if (!open(my $fh, '<', $qfn)) {
   ...
}

print $fh $s;  # XXX

if (my ($y) = f($x)) {   # Returns () on error.
   ...
}

print defined($y) ? $y : '[undef]';  # XXX

Solutions:

• Declare the var earlier:

  my $fh;
  if (!open($fh, '<', $qfn)) {
     ...
  }
  

  my $y;
  if (($y) = f($x)) {   # Returns () on error.
     ...
  }
  

• Save the result:

  my $success = open(my $fh, '<', $qfn);
  if (!$success) {
     ...
  }
  

  my $success = my ($y) = f($x);  # Returns () on error.
  if (!$success) {
     ...
  }
  

• Use do:

  open(my $fh, '<', $qfn)
     or do { ...
           };
  

  my ($y) = f($x)   # Returns () on error.
     or do { ...
           };