- Perl in a Nutshell, 2nd Edition
- Preface
- I. Getting Started
- 1. Introduction to Perl
- 2. Installing Perl
- II. Language Basics
- 3. The Perl Executable
- 4. The Perl Language
- 4.1. Program Structure
- 4.2. Data Types and Variables
- 4.3. Statements
- 4.4. Special Variables
- 4.5. Operators
- 4.5.1. The Arrow Operator
- 4.5.2. Unary Operators
- 4.5.3. Arithmetic Operators
- 4.5.4. Comparison Operators
- 4.5.5. Autoincrement and Autodecrement
- 4.5.6. Assignment Operators
- 4.5.7. Pattern Match Operators
- 4.5.8. File Test Operators
- 4.5.9. Logical Operators
- 4.5.10. Bitwise Operators
- 4.5.11. Miscellaneous Operators
- 4.6. Regular Expressions
- 4.7. Subroutines
- 4.8. References and Complex Data Structures
- 4.9. Filehandles
- 4.10. Signals
- 4.11. Unicode
- 4.12. Formats
- 4.13. Pod
- 5. Function Reference
- 5.1. Perl Functions by Category
- abs
- accept
- alarm
- atan2
- bind
- binmode
- bless
- caller
- chdir
- chmod
- chomp
- chop
- chown
- chr
- chroot
- close
- closedir
- connect
- cos
- crypt
- dbmclose
- dbmopen
- defined
- delete
- die
- do
- dump
- each
- endgrent
- endhostent
- endnetent
- endprotoent
- endpwent
- endservent
- eof
- eval
- exec
- exists
- exit
- exp
- fcntl
- fileno
- flock
- fork
- formline
- getc
- getgrent
- getgrgid
- getgrnam
- gethostbyaddr
- gethostbyname
- gethostent
- getlogin
- getnetbyaddr
- getnetbyname
- getnetent
- getpeername
- getpgrp
- getppid
- getpriority
- getprotobyname
- getprotobynumber
- getprotoent
- getpwent
- getpwnam
- getpwuid
- getservbyname
- getservbyport
- getservent
- getsockname
- getsockopt
- glob
- gmtime
- goto
- grep
- hex
- index
- int
- ioctl
- join
- keys
- kill
- last
- lc
- lcfirst
- length
- link
- listen
- local
- localtime
- log
- lstat
- map
- mkdir
- msgctl
- msgget
- msgrcv
- msgsnd
- my
- next
- no
- oct
- open
- opendir
- ord
- our
- pack
- package
- pipe
- pop
- pos
- printf
- prototype
- push
- q/string/
- quotemeta
- rand
- read
- readdir
- readline
- readlink
- readpipe
- recv
- redo
- ref
- rename
- require
- reset
- return
- reverse
- rewinddir
- rindex
- rmdir
- scalar
- seek
- seekdir
- select
- select
- semctl
- semget
- semop
- send
- sethostent
- setgrent
- setnetent
- setpgrp
- setpriority
- setprotoent
- setpwent
- setservent
- setsockopt
- shift
- shmctl
- shmget
- shmread
- shmwrite
- shutdown
- sin
- sleep
- socket
- socketpair
- sort
- splice
- split
- sprintf
- sqrt
- srand
- stat
- study
- sub
- substr
- symlink
- syscall
- sysopen
- sysread
- sysseek
- system
- syswrite
- tell
- telldir
- tie
- tied
- time
- times
- truncate
- uc
- ucfirst
- umask
- undef
- unlink
- unpack
- unshift
- untie
- use
- utime
- values
- vec
- wait
- waitpid
- wantarray
- warn
- write
- 6. Debugging
- III. Modules
- 7. Packages, Modules, and Objects
- 8. Standard Modules
- 8.1. AnyDBM_File
- 8.2. Attribute::Handlers
- 8.3. attributes
- 8.4. attrs
- 8.5. AutoLoader
- 8.6. AutoSplit
- 8.7. autouse
- 8.8. B
- 8.9. B::Asmdata
- 8.10. B::Assembler
- 8.11. B::Bblock
- 8.12. B::Bytecode
- 8.13. B::C
- 8.14. B::CC
- 8.15. B::Concise
- 8.16. B::Debug
- 8.17. B::Deparse
- 8.18. B::Disassembler
- 8.19. B::Lint
- 8.20. B::Showlex
- 8.21. B::Stackobj
- 8.22. B::Terse
- 8.23. B::Xref
- 8.24. base
- 8.25. Benchmark
- 8.26. bigint
- 8.27. bignum
- 8.28. bigrat
- 8.29. blib
- 8.30. bytes
- 8.31. ByteLoader
- 8.32. Carp
- 8.33. CGI
- 8.34. CGI::Apache
- 8.35. CGI::Carp
- 8.36. CGI::Cookie
- 8.37. CGI::Fast
- 8.38. CGI::Pretty
- 8.39. CGI::Push
- 8.40. CGI::Switch
- 8.41. charnames
- 8.42. Class::ISA
- 8.43. Class::Struct
- 8.44. Config
- 8.45. constant
- 8.46. CPAN
- 8.47. CPAN::FirstTime
- 8.48. CPAN::Nox
- 8.49. Cwd
- 8.50. Data::Dumper
- 8.51. DB
- 8.52. DB_File
- 8.53. Devel::DProf
- 8.54. Devel::PPPort
- 8.55. Devel::SelfStubber
- 8.56. diagnostics
- 8.57. Digest
- 8.58. Digest::MD5
- 8.59. DirHandle
- 8.60. Dumpvalue
- 8.61. DynaLoader
- 8.62. encoding
- 8.63. English
- 8.64. Env
- 8.65. Errno
- 8.66. Exporter
- 8.67. ExtUtils::Command
- 8.68. ExtUtils::Command::MM
- 8.69. ExtUtils::Constant
- 8.70. ExtUtils::Embed
- 8.71. ExtUtils::Install
- 8.72. ExtUtils::Installed
- 8.73. ExtUtils::Liblist
- 8.74. ExtUtils::MakeMaker
- 8.75. ExtUtils::Manifest
- 8.76. ExtUtils::Miniperl
- 8.77. ExtUtils::Mkbootstrap
- 8.78. ExtUtils::Mksymlists
- 8.79. ExtUtils::MM
- 8.80. ExtUtils::MM_Any
- 8.81. ExtUtils::MM_BeOS
- 8.82. ExtUtils::MM_DOS
- 8.83. ExtUtils::MM_NW5
- 8.84. ExtUtils::MM_OS2
- 8.85. ExtUtils::MM_Unix
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- Reference Section
- 8.85.1. Methods to Produce the Makefile
- 8.86. ExtUtils::MM_UWIN
- 8.87. ExtUtils::MM_VMS
- 8.88. ExtUtils::MM_Win32
- 8.89. ExtUtils::MY
- 8.90. ExtUtils::Packlist
- 8.91. ExtUtils::testlib
- 8.92. Fatal
- 8.93. Fcntl
- 8.94. fields
- 8.95. File::Basename
- 8.96. File::CheckTree
- 8.97. File::Compare
- 8.98. File::Copy
- 8.99. File::DosGlob
- 8.100. File::Find
- 8.101. File::Path
- 8.102. File::Spec
- 8.103. File::Spec::Cygwin
- 8.104. File::Spec::Mac
- 8.105. File::Spec::OS2
- 8.106. File::Spec::Unix
- 8.107. File::Spec::VMS
- 8.108. File::Spec::Win32
- 8.109. File::stat
- 8.110. File::Temp
- 8.111. FileCache
- 8.112. FileHandle
- 8.113. Filter::Simple
- 8.114. Filter::Util::Call
- 8.115. FindBin
- 8.116. GDBM_File
- 8.117. Getopt::Long
- 8.118. Getopt::Std
- 8.119. Hash::Util
- 8.120. I18N::Collate
- 8.121. I18N::Langinfo
- 8.122. I18N::LangTags
- 8.123. I18N::LangTags::List
- 8.124. if
- 8.125. integer
- 8.126. IO
- 8.127. IO::File
- 8.128. IO::Handle
- 8.129. IO::Pipe
- 8.130. IO::Seekable
- 8.131. IO::Select
- 8.132. IO::Socket
- 8.133. IPC::Msg
- 8.134. IPC::Open2
- 8.135. IPC::Open3
- 8.136. IPC::Semaphore
- 8.137. IPC::SysV
- 8.138. less
- 8.139. lib
- 8.140. List::Util
- 8.141. locale
- 8.142. Math::BigFloat
- 8.143. Math::BigInt
- 8.144. Math::BigInt::Calc
- 8.145. Math::BigRat
- 8.146. Math::Complex
- 8.147. Math::Trig
- 8.148. MIME::Base64
- 8.149. MIME::QuotedPrint
- 8.150. NDBM_File
- 8.151. Net::Cmd
- 8.152. Net::Config
- 8.153. Net::Domain
- 8.154. Net::FTP
- 8.155. Net::hostent
- 8.156. Net::netent
- 8.157. Net::Netrc
- 8.158. Net::NNTP
- 8.159. Net::Ping
- 8.160. Net::POP3
- 8.161. Net::protoent
- 8.162. Net::servent
- 8.163. Net::SMTP
- 8.164. Net::Time
- 8.165. O
- 8.166. ODBM_File
- 8.167. Opcode
Name
filter
Synopsis
filter()
Performs the main processing for the filter. Used with
closure filters; that is, a closure filter handles the lexical
variables that are maintained by the closure. The finished source,
as processed by filter, will be
returned in $_.
filter returns a status,
as follows:
< 0An error has been encountered.
EOFEnd-of-file has been reached unexpectedly.
> 0Everything is OK.
-
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