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-=head1 NAME
-
-perlcheat - Perl 5 Cheat Sheet
-
-=head1 DESCRIPTION
-
-This 'cheat sheet' is a handy reference, meant for beginning Perl
-programmers. Not everything is mentioned, but 195 features may
-already be overwhelming.
-
-=head2 The sheet
-
- CONTEXTS SIGILS ref ARRAYS HASHES
- void $scalar SCALAR @array %hash
- scalar @array ARRAY @array[0, 2] @hash{'a', 'b'}
- list %hash HASH $array[0] $hash{'a'}
- &sub CODE
- *glob GLOB SCALAR VALUES
- FORMAT number, string, ref, glob, undef
- REFERENCES
- \ reference $$foo[1] aka $foo->[1]
- $@%&* dereference $$foo{bar} aka $foo->{bar}
- [] anon. arrayref ${$$foo[1]}[2] aka $foo->[1]->[2]
- {} anon. hashref ${$$foo[1]}[2] aka $foo->[1][2]
- \() list of refs
- NUMBERS vs STRINGS LINKS
- OPERATOR PRECEDENCE = = perldoc.perl.org
- -> + . search.cpan.org
- ++ -- == != eq ne cpan.org
- ** < > <= >= lt gt le ge pm.org
- ! ~ \ u+ u- <=> cmp p3rl.org
- =~ !~ perlmonks.org
- * / % x SYNTAX
- + - . foreach (LIST) { } for (a;b;c) { }
- << >> while (e) { } until (e) { }
- named uops if (e) { } elsif (e) { } else { }
- < > <= >= lt gt le ge unless (e) { } elsif (e) { } else { }
- == != <=> eq ne cmp ~~ given (e) { when (e) {} default {} }
- &
- | ^ REGEX METACHARS REGEX MODIFIERS
- && ^ string begin /i case insensitive
- || // $ str end (bfr \n) /m line based ^$
- .. ... + one or more /s . includes \n
- ?: * zero or more /x ignore wh.space
- = += -= *= etc ? zero or one /p preserve
- , => {3,7} repeat in range /a ASCII /aa safe
- list ops | alternation /l locale /d dual
- not [] character class /u Unicode
- and \b word boundary /e evaluate /ee rpts
- or xor \z string end /g global
- () capture /o compile pat once
- DEBUG (?:p) no capture
- -MO=Deparse (?#t) comment REGEX CHARCLASSES
- -MO=Terse (?=p) ZW pos ahead . [^\n]
- -D## (?!p) ZW neg ahead \s whitespace
- -d:Trace (?<=p) ZW pos behind \K \w word chars
- (?<!p) ZW neg behind \d digits
- CONFIGURATION (?>p) no backtrack \pP named property
- perl -V:ivsize (?|p|p)branch reset \h horiz.wh.space
- (?&NM) cap to name \R linebreak
- \S \W \D \H negate
- FUNCTION RETURN LISTS
- stat localtime caller SPECIAL VARIABLES
- 0 dev 0 second 0 package $_ default variable
- 1 ino 1 minute 1 filename $0 program name
- 2 mode 2 hour 2 line $/ input separator
- 3 nlink 3 day 3 subroutine $\ output separator
- 4 uid 4 month-1 4 hasargs $| autoflush
- 5 gid 5 year-1900 5 wantarray $! sys/libcall error
- 6 rdev 6 weekday 6 evaltext $@ eval error
- 7 size 7 yearday 7 is_require $$ process ID
- 8 atime 8 is_dst 8 hints $. line number
- 9 mtime 9 bitmask @ARGV command line args
- 10 ctime 10 hinthash @INC include paths
- 11 blksz 3..10 only @_ subroutine args
- 12 blcks with EXPR %ENV environment
-
-=head1 ACKNOWLEDGEMENTS
-
-The first version of this document appeared on Perl Monks, where several
-people had useful suggestions. Thank you, Perl Monks.
-
-A special thanks to Damian Conway, who didn't only suggest important changes,
-but also took the time to count the number of listed features and make a
-Perl 6 version to show that Perl will stay Perl.
-
-=head1 AUTHOR
-
-Juerd Waalboer <#####@juerd.nl>, with the help of many Perl Monks.
-
-=head1 SEE ALSO
-
-=over 4
-
-=item *
-
-L<http://perlmonks.org/?node_id=216602> - the original PM post
-
-=item *
-
-L<http://perlmonks.org/?node_id=238031> - Damian Conway's Perl 6 version
-
-=item *
-
-L<http://juerd.nl/site.plp/perlcheat> - home of the Perl Cheat Sheet
-
-=back