Re^3: Stupid If Question

Three variables were defined, one in each block. (Blocks which aren't even mutually exclusive, I might add.) A fourth variable doesn't magically become defined elsewhere as a result. I believe you want

my $var;
if (...) {
   $var = ...;
}
elsif (...) {
   $var = ...;
}
else {
   die;
}
[download]

Comment on Re^3: Stupid If Question Download Code

Replies are listed 'Best First'.
Re^4: Stupid If Question by ig (Vicar) on Aug 19, 2009 at 07:49 UTC
(Blocks which aren't even mutually exclusive, I might add.) Initially I thought you meant that the blocks aren't mutually exclusive from the perspective of lexical variable scoping. It has never occurred to me that an if statement might create a single scope, rather than one for each branch. Testing seems to confirm my assumption that each branch is a separate scope. `#!/usr/local/bin/perl use strict; use warnings; foreach (1..3) { if($_ < 2) { my $x = 1; print "$_ < 2, \$x = $x\n"; } else { print "$_ >= 2, \$x = $x\n"; } } __END__ Global symbol "$x" requires explicit package name at ./test.pl line 10 +. Execution of ./test.pl aborted due to compilation errors.` [download] Then it occurred to me that you probably mean that the conditions of the two if statements are not mutually exclusive - a possible problem with program logic but not affecting variable scope.	[reply] [d/l]
Re^5: Stupid If Question by ikegami (Patriarch) on Aug 19, 2009 at 14:44 UTC
Then it occurred to me that you probably mean that the conditions of the two if statements are not mutually exclusive Correct.	[reply]