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.\" ========================================================================
.\"
.IX Title "PERLCHEAT 1"
.TH PERLCHEAT 1 "2012-11-03" "perl v5.12.5" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
perlcheat \- Perl 5 Cheat Sheet
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This 'cheat sheet' is a handy reference, meant for beginning Perl
programmers. Not everything is mentioned, but 195 features may
already be overwhelming.
.SS "The sheet"
.IX Subsection "The sheet"
.Vb 10
\&  CONTEXTS  SIGILS             ARRAYS        HASHES
\&  void      $scalar   whole:   @array        %hash
\&  scalar    @array    slice:   @array[0, 2]  @hash{\*(Aqa\*(Aq, \*(Aqb\*(Aq}
\&  list      %hash     element: $array[0]     $hash{\*(Aqa\*(Aq}
\&            &sub
\&            *glob    SCALAR VALUES
\&                     number, string, reference, glob, undef
\&  REFERENCES
\&  \e     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]
\&  \e()   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
\&  ! ~ \e 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 \en) /m line based ^$
\&  .. ...           +     one or more          /s . includes \en
\&  ?:               *     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  .  == [^\en]
\&  or xor           |     alternation      \es == whitespace
\&                   \eb    word boundary    \ew == word characters
\&                   \ez    string end       \ed == digits
\&  DO                                      \eS, \eW and \eD negate
\&  use strict;        DON\*(AqT
\&  use warnings;      "$foo"           LINKS
\&  my $var;           $$variable_name  perl.com
\&  open() or die $!;  \`$userinput\`     use.perl.org
\&  use Modules;       /$userinput/     perl.apache.org
\&
\&  FUNCTION RETURN LISTS
\&  stat      localtime    caller         SPECIAL VARIABLES
\&   0 dev    0 second     0 package      $_    default variable
\&   1 ino    1 minute     1 filename     $0    program name
\&   2 mode   2 hour       2 line         $/    input separator
\&   3 nlink  3 day        3 subroutine   $\e    output separator
\&   4 uid    4 month\-1    4 hasargs      $|    autoflush
\&   5 gid    5 year\-1900  5 wantarray    $!    sys/libcall error
\&   6 rdev   6 weekday    6 evaltext     $@    eval error
\&   7 size   7 yearday    7 is_require   $$    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
.Ve
.SH "ACKNOWLEDGEMENTS"
.IX Header "ACKNOWLEDGEMENTS"
The first version of this document appeared on Perl Monks, where several
people had useful suggestions. Thank you, Perl Monks.
.PP
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.
.SH "AUTHOR"
.IX Header "AUTHOR"
Juerd Waalboer <#####@juerd.nl>, with the help of many Perl Monks.

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	runtime/perl-512
=
Stability	Uncommitted
.TE 
.PP
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.Vb 3
\& http://perlmonks.org/?node_id=216602      the original PM post
\& http://perlmonks.org/?node_id=238031      Damian Conway\*(Aqs Perl 6 version
\& http://juerd.nl/site.plp/perlcheat        home of the Perl Cheat Sheet
.Ve


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://www.cpan.org/src/5.0/perl-5.12.5.tar.bz2

Further information about this software can be found on the open source community website at http://www.perl.org/.