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November 30, 2012, at 02:22 AM by 223.228.237.185 -
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November 30, 2012, at 02:22 AM by 223.228.237.185 -
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November 30, 2012, at 01:57 AM by 223.228.237.185 -
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!!perlcheat - Perl 5 Cheat Sheet

(:Googletxt:)
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!!NAME

perlcheat - Perl 5 Cheat Sheet

!!DESCRIPTION

This 'cheat sheet' is a handy reference, meant for beginning Perl programmers. Not everything is mentioned, but 195 features may already be overwhelming.

The sheet
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(:cellnr:)

[@


1. CONTEXTS SIGILS ref ARRAYS HASHES

2. void $scalar SCALAR @array %hash

3. scalar @array ARRAY @array[0, 2] @hash{'a', 'b'}

4. list %hash HASH $array[0] $hash{'a'}

5. &sub CODE

6. *glob GLOB SCALAR VALUES

7. FORMAT number, string, ref, glob, undef

8. REFERENCES

9. \ reference $$foo[1] aka $foo->[1]
10. $@%&* dereference $$foo{bar} aka $foo->{bar}
11. [] anon. arrayref ${$$foo[1]}[2] aka $foo->[1]->[2]
12. {} anon. hashref ${$$foo[1]}[2] aka $foo->[1][2]
13. \() list of refs

14. NUMBERS vs STRINGS LINKS

15. OPERATOR PRECEDENCE = = perldoc.perl.org
16. -> + . search.cpan.org
17. ++ -- == != eq ne cpan.org
18. ** < > <= >= lt gt le ge pm.org
19. ! ~ \ u+ u- <=> cmp p3rl.org
20. =~ !~ perlmonks.org
21. * / % x SYNTAX
22. + - . foreach (LIST) { } for (a;b;c) { }
23. << >> while (e) { } until (e) { }
24. named uops if (e) { } elsif (e) { } else { }
25. < > <= >= lt gt le ge unless (e) { } elsif (e) { } else { }
26. == != <=> eq ne cmp ~~ given (e) { when (e) {} default {} }
27. &
28. | ^ REGEX METACHARS REGEX MODIFIERS
29. && ^ string begin /i case insensitive
30. || // $ str end (bfr \n) /m line based ^$
31. .. ... + one or more /s . includes \n
32. ?: * zero or more /x ignore wh.space
33. = += -= *= etc ? zero or one /p preserve
34. , => {3,7} repeat in range /a ASCII /aa safe
35. list ops | alternation /l locale /d dual
36. not [] character class /u Unicode
37. and \b word boundary /e evaluate /ee rpts
38. or xor \z string end /g global
39. () capture /o compile pat once
40. DEBUG (?:p) no capture
41. -MO=Deparse (?#t) comment REGEX CHARCLASSES
42. -MO=Terse (?=p) ZW pos ahead . [^\n]
43. -D## (?!p) ZW neg ahead \s whitespace
44. -d:Trace (?<=p) ZW pos behind \K \w word chars
45. (?<!p) ZW neg behind \d digits
46. CONFIGURATION (?>p) no backtrack \pP named property
47. perl -V:ivsize (?|p|p)branch reset \h horiz.wh.space
48. (?&NM) cap to name \R linebreak
49. \S \W \D \H negate
50. FUNCTION RETURN LISTS
51. stat localtime caller SPECIAL VARIABLES
52. 0 dev 0 second 0 package $_ default variable
53. 1 ino 1 minute 1 filename $0 program name
54. 2 mode 2 hour 2 line $/ input separator
55. 3 nlink 3 day 3 subroutine $\ output separator
56. 4 uid 4 month-1 4 hasargs $| autoflush
57. 5 gid 5 year-1900 5 wantarray $! sys/libcall error
58. 6 rdev 6 weekday 6 evaltext $@ eval error
59. 7 size 7 yearday 7 is_require $$ process ID
60. 8 atime 8 is_dst 8 hints $. line number
61. 9 mtime 9 bitmask @ARGV command line args
62. 10 ctime 10 hinthash @INC include paths
63. 11 blksz 3..10 only @_ subroutine args
64. 12 blcks with EXPR %ENV environment


@]
(:tableend:)


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.

AUTHOR

Juerd Waalboer <#####@juerd.nl>, with the help of many Perl Monks.

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
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July 16, 2012, at 11:58 AM by 115.241.32.34 -
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*[[Perl-Default-Variable]]
July 16, 2012, at 11:04 AM by 115.241.32.34 -
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*[[Perl-command-Line]]
July 16, 2012, at 01:15 AM by 115.242.137.173 -
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*[[Installing-perl-doc]]
to:
(:Google1:)
----
*[[Installing-perl-
doc]]

*[[Perl-manual-sections]]

(:Googletxt:)

(:Googlemm:)
July 16, 2012, at 01:09 AM by 115.242.137.173 -
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*[[Installing-perl-doc]]
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