Re: How to have a subroutine return an undefined hash

my %hash = getHash();

if (! defined(%hash)) {
  print "undef\n";
} else {
  print "not undef\n";
}
[download]

Comment on Re: How to have a subroutine return an undefined hash Download Code

Replies are listed 'Best First'.
Re^2: How to have a subroutine return an undefined hash by Fletch (Bishop) on Apr 26, 2005 at 12:53 UTC
Quoth `perldoc -f defined`: `Use of "defined" on aggregates (hashes and arrays) is depre- cated. It used to report whether memory for that aggregate has ever been allocated. This behavior may disappear in future versions of Perl. You should instead use a simple test for size: if (@an_array) { print "has array elements\n" } if (%a_hash) { print "has hash members\n" }` [download]	[reply] [d/l] [select]
Re^3: How to have a subroutine return an undefined hash by samizdat (Vicar) on Apr 26, 2005 at 12:59 UTC
Gawd! Moving targets, yet. Thank you, Fletch, I stand corrected!	[reply]