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Know how to tie your tie?

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The most used tie module. DB File. Alberto Simoes. Know how to tie your tie? ... Know how to store your tie. Say how to save elements... sub STORE { ...

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Know how to tie your tie?Page 1Know how to tie your tie?Alberto Simoesambs@cpan.orgBraga.pm TechMeeting 5 April 18Alberto SimoesKnow how to tie your tie?Page 2Perl tie in a sentence:Associate Actions forData Type Objects Events.Alberto SimoesKnow how to tie your tie?Page 3For instance...Perform actions when:a specific variable value changes;when an array element is fetched;when a hash element existence is verified;when an array element is deleted;when the keys for an hash are calculated;...Alberto SimoesKnow how to tie your tie?Page 4The most used tieAlberto SimoesKnow how to tie your tie?Page 5The most used tie moduleDB FileAlberto SimoesKnow how to tie your tie?Page 6The most used tie moduleDB FileSometimes using MLDBMAlberto SimoesKnow how to tie your tie?Page 7The most used tie moduleDB FileSometimes using MLDBMAre the hash persistence module by excellence.Alberto SimoesKnow how to tie your tie?Page 8DB File example (create)use DB_File;use fcntl;tie %hash DB_File file.dbO_CREAT|O_RDWR 0666 $DB_BTREE;for $a in (0..10) {$hash{$a} = $a**$a;}untie %hashAlberto SimoesKnow how to tie your tie?Page 9DB File example (query)use DB_File;use fcntl;tie %hash DB_File file.dbO_CREAT|O_RDWR 0666 $DB_BTREE;for $a in (0..10) {print "$a > $hash{$a} "}untie %hashAlberto SimoesKnow how to tie your tie?Page 10And what about MLDBM?Store multilevel hash structurein single level tied hashAnd yes there are other alternatives! TIMTOWTDI!Alberto SimoesKnow how to tie your tie?Page 11Parte ITie Mini TutorialAlberto SimoesKnow how to tie your tie?Page 12OverviewAlberto SimoesKnow how to tie your tie?Page 13Show your tie type and take itDefine yout tie typepackage Tie::File;And initialize it...sub TIEHASH {my $class = shift;my $dir = shift;mkdir $dir unless d $dir;my $self = { dir => $dir };return bless $self $class;}This code will be called when you:tie %hash Tie::File "/tmp/";Alberto SimoesKnow how to tie your tie?Page 14Know how to store your tieSay how to sav ...

Source: braga.pm.org

 

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