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| author | Robin Barker <RMBarker@cpan.org> | 2000-12-22 12:17:38 +0000 |
|---|---|---|
| committer | Jarkko Hietaniemi <jhi@iki.fi> | 2000-12-22 15:29:40 +0000 |
| commit | 551e1d922a333f90a45a26904eb4d9882f7bd5d4 (patch) | |
| tree | 165f10dcbb565db453a9cfef7096b16826754211 /pod/perlsub.pod | |
| parent | a61357a9a84c55ce0c74b8d2bbfb23900cb5bd17 (diff) | |
| download | perl-551e1d922a333f90a45a26904eb4d9882f7bd5d4.tar.gz | |
; was Re: Perlbug 20000322.006 status +update
Message-Id: <200012221217.MAA21332@tempest.npl.co.uk>
p4raw-id: //depot/perl@8228
Diffstat (limited to 'pod/perlsub.pod')
| -rw-r--r-- | pod/perlsub.pod | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/pod/perlsub.pod b/pod/perlsub.pod index ae128ceb59..cef8050731 100644 --- a/pod/perlsub.pod +++ b/pod/perlsub.pod @@ -699,7 +699,9 @@ I<must> use C<local> instead of C<my>. =over 4 -=item 1. You need to give a global variable a temporary value, especially $_. +=item 1. + +You need to give a global variable a temporary value, especially $_. The global variables, like C<@ARGV> or the punctuation variables, must be C<local>ized with C<local()>. This block reads in F</etc/motd>, and splits @@ -716,7 +718,9 @@ in C<@Fields>. It particular, it's important to C<local>ize $_ in any routine that assigns to it. Look out for implicit assignments in C<while> conditionals. -=item 2. You need to create a local file or directory handle or a local function. +=item 2. + +You need to create a local file or directory handle or a local function. A function that needs a filehandle of its own must use C<local()> on a complete typeglob. This can be used to create new symbol @@ -746,7 +750,9 @@ a local alias. See L<perlref/"Function Templates"> for more about manipulating functions by name in this way. -=item 3. You want to temporarily change just one element of an array or hash. +=item 3. + +You want to temporarily change just one element of an array or hash. You can C<local>ize just one element of an aggregate. Usually this is done on dynamics: |