diff options
Diffstat (limited to 'pod/perltrap.pod')
| -rw-r--r-- | pod/perltrap.pod | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/pod/perltrap.pod b/pod/perltrap.pod index 3d31173584..e85f5c9007 100644 --- a/pod/perltrap.pod +++ b/pod/perltrap.pod @@ -549,6 +549,36 @@ behave like C<split /\s+/> (which does). # perl4 prints: :hi:mom # perl5 prints: hi:mom +=item * BugFix + +Perl 4 would ignore any text which was attached to an C<-e> switch, +always taking the code snippet from the following arg. Additionally, it +would silently accept an C<-e> switch without a following arg. Both of +these behaviors have been fixed. + + perl -e'print "attached to -e"' 'print "separate arg"' + + # perl4 prints: separate arg + # perl5 prints: attached to -e + + perl -e + + # perl4 prints: + # perl5 dies: No code specified for -e. + +=item * Discontinuance + +In Perl 4 the return value of C<push> was undocumented, but it was +actually the last value being pushed onto the target list. In Perl 5 +the return value of C<push> is documented, but has changed, it is the +number of elements in the resulting list. + + @x = ('existing'); + print push(@x, 'first new', 'second new'); + + # perl4 prints: second new + # perl5 prints: 3 + =item * Deprecation Some error messages will be different. @@ -640,8 +670,8 @@ Logical tests now return an null, instead of 0 # perl4 prints: 0 # perl5 prints: -Also see the L<General Regular Expression Traps> tests for another example -of this new feature... +Also see the L<General Regular Expression Traps using s///, etc.> +tests for another example of this new feature... =back |