Perl Cookbook, Second Edition
| [SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] -d file test operator daemon servers 2nd data structures binary trees circular, coping with, using weak references complex, creating on the fly copying outlines parsing XML into printing storing to disk transparently persistent __DATA__ token data types circular data structures classes as structs data, relationships between 2nd [See also variables][See also variables] Data::Dumper module database access DBM files converting between emptying making and using merging sorting storing complex data in dealing with errors ggh program persistent data speeding up with mod_perl SQL queries 2nd 3rd using transactions viewing data one page at a time datagram sockets date and time values arithmetic with converting to and from Epoch seconds Date::DateCalc Date::Manip module 2nd days, calculating number between two dates file access timestamps high-resolution timers hopdelta program parsing information from strings printing seconds passed since Epoch sleeps sorting mail by Time::gmtime module Time::HiRes module Time::Local module Time::timelocal module timing out operations today's date, finding years Date::Calc module 2nd Date::DateCalc module Date::Manip module 2nd 3rd DateCalc( ) day, month, year, hour, minute, seconds (DMYHMS) Day_of_week( ) Day_of_Year( ) days [See date and time values] DB_File module DB_RECNO access method sorting large DBM files db2gdbm program DBD module DBD::CSV module DBD::SQLite module 2nd DBI module DBIx::Dump module DBM files complex data in converting between emptying GDBM files making and using merging sorting DBM libraries dclone( ) 2nd debugging CGI scripts 2nd raw HTTP exchange deep copies default values for variables defined operator definedness 2nd deg2rad( ) delaying module loading delete( ) compared to undef( ) multiple hash key values deleting clearing the screen directories and their contents DOS shell window emptying DBM files files last line of hash elements HTML tags from strings selected subroutine return values whitespace at string ends delimiters Delta_Days( ) Delta_DHMS( ) dequote( ) dereferencing [See references] destructors 2nd Devel::Peek module diacritics converting case and dialog boxes with Tk toolkit DialogBox widget, Tk die function __DIE__ signal differences of lists computing simple and symmetric directories copying and moving files deleting deleting files multiple names for same file of modules parsing filenames processing all files in recursively recursively duplicating renaming files sorting contents of 2nd timestamps directory handles dirname( ) disk usage, library Distinguished Name (DN) DMYHMS (day, month, year, hour, minute, seconds) DMYHMS values [See date and time values] DN (Distinguished Name) DNS lookups do( ) configuration files, reading finding number of rows returned by SQL queries Document Object Model (DOM) dollar sign ($) $! variable $#ARRAY variable $$ variable 2nd 3rd $& variable 2nd $* variable (deprecated) $+ variable $. variable 2nd $/ variable $; variable $? variable 2nd 3rd 4th $@ variable 2nd $^F variable $^I variable $^O variable 2nd $^W variable $_ variable 2nd 3rd accidental clobbering outlawing unauthorized use $` variable $| variable 2nd $0 variable 2nd $1, $2, . . . (backreferences) 2nd finding doubled words $VERSION variable (use pragma) hashes DOM (Document Object Model) trees building while validating XML parsing XML into domains for sockets DOS shell window, removing dot (.) . . and . . . range operators periods in numbers double quote (") escaping double words, finding du command, sorting output of Dump( ) Dumpvalue module duplicate list elements, extracting dutree program dynamic scoping |