diff options
| -rw-r--r-- | pod/perltie.pod | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pod/perltie.pod b/pod/perltie.pod index 327af04b54..30a0b1df20 100644 --- a/pod/perltie.pod +++ b/pod/perltie.pod @@ -768,6 +768,12 @@ the hash is inside an iteration. If this isn't the case, FIRSTKEY is called, and the result will be a false value if FIRSTKEY returns the empty list, true otherwise. +However, you should B<not> blindly rely on perl always doing the right +thing. Particularly, perl will mistakenly return true when you clear the +hash by repeatedly calling DELETE until it is empty. You are therefore +advised to supply your own SCALAR method when you want to be absolutely +sure that your hash behaves nicely in scalar context. + In our example we can just call C<scalar> on the underlying hash referenced by C<$self-E<gt>{LIST}>: |