diff options
Diffstat (limited to 'vms/perlvms.pod')
| -rw-r--r-- | vms/perlvms.pod | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/vms/perlvms.pod b/vms/perlvms.pod index 17e83e5c1b..f43cbb0e46 100644 --- a/vms/perlvms.pod +++ b/vms/perlvms.pod @@ -788,6 +788,14 @@ by saying (You can't just say C<$ENV{$key} = $ENV{$key}>, since the Perl optimizer is smart enough to elide the expression.) +Don't try to clear C<%ENV> by saying C<%ENV = ();>, it will throw +a fatal error. This is equivalent to doing the following from DCL: + + DELETE/LOGICAL * + +You can imagine how bad things would be if, for example, the SYS$MANAGER +or SYS$SYSTEM logicals were deleted. + At present, the first time you iterate over %ENV using C<keys>, or C<values>, you will incur a time penalty as all logical names are read, in order to fully populate %ENV. |