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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 ARRAYS HASHES
+ void $scalar whole: @array %hash
+ scalar @array slice: @array[0, 2] @hash{'a', 'b'}
+ list %hash element: $array[0] $hash{'a'}
+ &sub
+ *glob SCALAR VALUES
+ number, string, reference, glob, undef
+ REFERENCES
+ \ references $$foo[1] aka $foo->[1]
+ $@%&* dereference $$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 = = perl.plover.com
+ -> + . search.cpan.org
+ ++ -- == != eq ne cpan.org
+ ** < > <= >= lt gt le ge pm.org
+ ! ~ \ u+ u- <=> cmp tpj.com
+ =~ !~ perldoc.com
+ * / % x SYNTAX
+ + - . for (LIST) { }, for (a;b;c) { }
+ << >> while ( ) { }, until ( ) { }
+ named uops if ( ) { } elsif ( ) { } else { }
+ < > <= >= lt gt le ge unless ( ) { } elsif ( ) { } else { }
+ == != <=> eq ne cmp for equals foreach (ALWAYS)
+ &
+ | ^ REGEX METACHARS REGEX MODIFIERS
+ && ^ string begin /i case insens.
+ || $ str. end (before \n) /m line based ^$
+ .. ... + one or more /s . includes \n
+ ?: * zero or more /x ign. wh.space
+ = += -= *= etc. ? zero or one /g global
+ , => {3,7} repeat in range /o cmpl pat. once
+ list ops () capture
+ not (?:) no capture REGEX CHARCLASSES
+ and [] character class . == [^\n]
+ or xor | alternation \s == whitespace
+ \b word boundary \w == word characters
+ \z string end \d == digits
+ DO \S, \W and \D negate
+ use strict; DON'T
+ use warnings; "$foo" LINKS
+ my $var; $$variable_name perl.com
+ open() or die $!; `$userinput` use.perl.org
+ use Modules; /$userinput/ perl.apache.org
+
+ FUNCTION RETURN LISTS
+ stat localtime caller SPECIAL VARIABLES
+ 0 dev 0 second 0 package $_ default variable
+ 1 ino 1 minute 1 filename $0 program name
+ 2 mode 2 hour 2 line $/ input separator
+ 3 nlink 3 day 3 subroutine $\ output separator
+ 4 uid 4 month-1 4 hasargs $| autoflush
+ 5 gid 5 year-1900 5 wantarray $! sys/libcall error
+ 6 rdev 6 weekday 6 evaltext $@ eval error
+ 7 size 7 yearday 7 is_require $$ process ID
+ 8 atime 8 is_dst 8 hints $. line number
+ 9 mtime 9 bitmask @ARGV command line args
+ 10 ctime just use @INC include paths
+ 11 blksz POSIX:: 3..9 only @_ subroutine args
+ 12 blcks strftime! 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
+
+ http://perlmonks.org/?node_id=216602 the original PM post
+ http://perlmonks.org/?node_id=238031 Damian Conway's Perl 6 version
+ http://juerd.nl/site.plp/perlcheat home of the Perl Cheat Sheet