diff options
| author | Brian Fraser <fraserbn@gmail.com> | 2012-01-31 23:38:15 -0300 |
|---|---|---|
| committer | Father Chrysostomos <sprout@cpan.org> | 2012-06-27 08:35:55 -0700 |
| commit | cb1e035e419ace624c66b44e9d7af0fd773c149e (patch) | |
| tree | 50391f828037849a1af3ec374e86b0073ac5165c /pod/perldsc.pod | |
| parent | 0568eccda3e550f0e4e821d702e2bd967f33bc7a (diff) | |
| download | perl-cb1e035e419ace624c66b44e9d7af0fd773c149e.tar.gz | |
perldsc: #109408
Diffstat (limited to 'pod/perldsc.pod')
| -rw-r--r-- | pod/perldsc.pod | 25 |
1 files changed, 4 insertions, 21 deletions
diff --git a/pod/perldsc.pod b/pod/perldsc.pod index b30948c32a..c5f53d8c16 100644 --- a/pod/perldsc.pod +++ b/pod/perldsc.pod @@ -5,19 +5,8 @@ perldsc - Perl Data Structures Cookbook =head1 DESCRIPTION -The single feature most sorely lacking in the Perl programming language -prior to its 5.0 release was complex data structures. Even without direct -language support, some valiant programmers did manage to emulate them, but -it was hard work and not for the faint of heart. You could occasionally -get away with the C<$m{$AoA,$b}> notation borrowed from B<awk> in which the -keys are actually more like a single concatenated string C<"$AoA$b">, but -traversal and sorting were difficult. More desperate programmers even -hacked Perl's internal symbol table directly, a strategy that proved hard -to develop and maintain--to put it mildly. - -The 5.0 release of Perl let us have complex data structures. You -may now write something like this and all of a sudden, you'd have an array -with three dimensions! +Perl lets us have complex data structures. You can write something like +this and all of a sudden, you'd have an array with three dimensions! for $x (1 .. 10) { for $y (1 .. 10) { @@ -309,11 +298,8 @@ X<AoA, debugging> X<HoA, debugging> X<AoH, debugging> X<HoH, debugging> X<array of arrays, debugging> X<hash of arrays, debugging> X<array of hashes, debugging> X<hash of hashes, debugging> -Before version 5.002, the standard Perl debugger didn't do a very nice job of -printing out complex data structures. With 5.002 or above, the -debugger includes several new features, including command line editing as -well as the C<x> command to dump out complex data structures. For -example, given the assignment to $AoA above, here's the debugger output: +You can use the debugger's C<x> command to dump out complex data structures. +For example, given the assignment to $AoA above, here's the debugger output: DB<1> x $AoA $AoA = ARRAY(0x13b5a0) @@ -842,6 +828,3 @@ L<perlref>, L<perllol>, L<perldata>, L<perlobj> =head1 AUTHOR Tom Christiansen <F<tchrist@perl.com>> - -Last update: -Wed Oct 23 04:57:50 MET DST 1996 |