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Index: F
- failure, returning from subroutines
: 10.10. Returning Failure
- false strings : 1.0. Introduction
- fcntl( )
- false strings : 1.0. Introduction
- fdirs program (example)
: 9.7. Processing All Files in a Directory Recursively
- fdopen( ) (IO::Handle) : 7.19. Opening and Closing File Descriptors by Number
- FETCH( ) : 13.15. Creating Magic Variables with tie
- fetching URLs from Perl scripts : 20.1. Fetching a URL from a Perl Script
- fifolog program (example) : 16.11. Making a Process Look Like a File with Named Pipes
- FIFOs (named pipes) : 16.11. Making a Process Look Like a File with Named Pipes
- file access
- fdopen( ) (IO::Handle) : 7.19. Opening and Closing File Descriptors by Number
- (see also directories; file contents)
- 7.0. Introduction
- 9.0. Introduction
- access modes : 7.0. Introduction
- caching open filehandles : 7.17. Caching Open Output Filehandles
- copying filehandles : 7.20. Copying Filehandles
- copying or moving files : 9.3. Copying or Moving a File
- deleting files : 9.2. Deleting a File
- editing files : (see file contents)
- filtering filename input : 7.7. Writing a Filter
- flushing output : 7.12. Flushing Output
- locking files
- 7.0. Introduction
- 7.11. Locking a File
- 7.21. Program: netlock
- region-specific locks : 7.22. Program: lockarea
- 7.21. Program: netlock
- 7.11. Locking a File
- non-blocking I/O
: 7.14. Doing Non-Blocking I/O
- number of bytes to read : 7.15. Determining the Number of Bytes to Read
- opening files : 7.1. Opening a File
- opening/closing file descriptors : 7.19. Opening and Closing File Descriptors by Number
- printing to multiple filehandles : 7.18. Printing to Many Filehandles Simultaneously
- processing all files in directories
- number of bytes to read : 7.15. Determining the Number of Bytes to Read
- reading from multiple filehandles
: 7.13. Reading from Many Filehandles Without Blocking
- storing files in program text : 7.6. Storing Files Inside Your Program Text
- timestamps : 9.1. Getting and Setting Timestamps
- storing files in program text : 7.6. Storing Files Inside Your Program Text
- (see also directories; file contents)
- file contents
- (see also directories; file access)
- 8.0. Introduction
- 9.0. Introduction
- adding records to wtmp file : 8.18. Program: tailwtmp
- configuration files, reading : 8.16. Reading Configuration Files
- continually growing files, reading : 8.5. Trailing a Growing File
- counting lines/paragraphs/records : 8.2. Counting Lines (or Paragraphs or Records) in a File
- extracting single line : 8.8. Reading a Particular Line in a File
- fixed-length records
- 8.0. Introduction
- modifying
- with -i option
: 7.9. Modifying a File in Place with -i Switch
- with temporary files : 7.8. Modifying a File in Place with Temporary File
- without temporary files : 7.10. Modifying a File in Place Without a Temporary File
- with temporary files : 7.8. Modifying a File in Place with Temporary File
- with -i option
: 7.9. Modifying a File in Place with -i Switch
- processing all words in
: 8.3. Processing Every Word in a File
- processing binary files : 8.11. Processing Binary Files
- random access I/O : 8.12. Using Random-Access I/O
- random lines from : 8.6. Picking a Random Line from a File
- randomizing line order : 8.7. Randomizing All Lines
- reading backwards : 8.4. Reading a File Backwards by Line or Paragraph
- reading lines with continuation characters : 8.1. Reading Lines with Continuation Characters
- reading strings from binary files : 8.14. Reading a String from a Binary File
- reading/writing hash records to file : 11.10. Reading and Writing Hash Records to Text Files
- tctee program : 8.19. Program: tctee
- testing for trustworthiness : 8.17. Testing a File for Trustworthiness
- text files as database arrays : 14.7. Treating a Text File as a Database Array
- variable-length text fields : 8.9. Processing Variable-Length Text Fields
- viewing lastlog file information : 8.20. Program: laston
- processing binary files : 8.11. Processing Binary Files
- (see also directories; file access)
- file descriptors, opening/closing
: 7.19. Opening and Closing File Descriptors by Number
- file stat cache (_) : 9.0. Introduction
- __FILE__ symbol : 10.4. Determining Current Function Name
- File::Basename module : 9.10. Splitting a Filename into Its Component Parts
- File::Copy module : 9.3. Copying or Moving a File
- File::Find module
- file stat cache (_) : 9.0. Introduction
- File::KGlob module
: 9.6. Globbing, or Getting a List of Filenames Matching a Pattern
- File::LockDir module : 7.21. Program: netlock
- File::stat module
- File::LockDir module : 7.21. Program: netlock
- FileCache module
: 7.17. Caching Open Output Filehandles
- FileHandler module : 7.0. Introduction
- filehandles : 7.0. Introduction
- FileHandler module : 7.0. Introduction
- caching open filehandles
: 7.17. Caching Open Output Filehandles
- copying : 7.20. Copying Filehandles
- local
- copying : 7.20. Copying Filehandles
- non-blocking I/O
: 7.14. Doing Non-Blocking I/O
- passing
- printing to multiple simultaneously
: 7.18. Printing to Many Filehandles Simultaneously
- reading from many : 7.13. Reading from Many Filehandles Without Blocking
- reporting filenames in errors : 7.4. Making Perl Report Filenames in Errors
- storing as variables
- reading from many : 7.13. Reading from Many Filehandles Without Blocking
- tied : 13.15. Creating Magic Variables with tie
- caching open filehandles
: 7.17. Caching Open Output Filehandles
- filenames
- expanding tildes in
: 7.3. Expanding Tildes in Filenames
- filtering as input : 7.7. Writing a Filter
- matching with patterns : 9.6. Globbing, or Getting a List of Filenames Matching a Pattern
- multiple, for same file : 9.4. Recognizing Two Names for the Same File
- parsing : 9.10. Splitting a Filename into Its Component Parts
- renaming : 9.9. Renaming Files
- reporting in errors : 7.4. Making Perl Report Filenames in Errors
- sorting
- filtering as input : 7.7. Writing a Filter
- strange, opening files with : 7.2. Opening Files with Unusual Filenames
- expanding tildes in
: 7.3. Expanding Tildes in Filenames
- fileparse( )
: 9.10. Splitting a Filename into Its Component Parts
- files
- deleting last line of
: 8.10. Removing the Last Line of a File
- temporary : 7.5. Creating Temporary Files
- deleting last line of
: 8.10. Removing the Last Line of a File
- filesystem
: (see directories)
- filtering filenames as input : 7.7. Writing a Filter
- filtering output : 16.5. Filtering Your Own Output
- FindBin module : 12.7. Keeping Your Own Module Directory
- finddepth( ) : 9.8. Removing a Directory and Its Contents
- finding
- filtering filenames as input : 7.7. Writing a Filter
- most common anything
: 5.14. Finding the Most Common Anything
- patterns : (see pattern matching; regular expressions)
- most common anything
: 5.14. Finding the Most Common Anything
- findlogin program (example)
: 7.7. Writing a Filter
- FIONREAD call : 7.15. Determining the Number of Bytes to Read
- firewalls, connecting through : 17.18. Program: fwdport
- fisher_yates_shuffle( ) : 4.17. Randomizing an Array
- fixed-length records
- FIONREAD call : 7.15. Determining the Number of Bytes to Read
- FixNum class
: 13.14. Overloading Operators
- fixstyle program (example) : 1.17. Program: fixstyle
- fixstyle2 program (example) : 1.17. Program: fixstyle
- flattened lists : 4.0. Introduction
- floating-point numbers : 2.0. Introduction
- fixstyle program (example) : 1.17. Program: fixstyle
- comparing
: 2.2. Comparing Floating-Point Numbers
- rounding : 2.3. Rounding Floating-Point Numbers
- comparing
: 2.2. Comparing Floating-Point Numbers
- flock( )
- floor( )
: 2.3. Rounding Floating-Point Numbers
- flushing output : 7.12. Flushing Output
- fmt program : 1.12. Reformatting Paragraphs
- folded_demo program (example) : 13.15. Creating Magic Variables with tie
- foodfind program : 5.8. Inverting a Hash
- =for escape pod directive : 12.16. Documenting Your Module with Pod
- foreach( ) : 4.12. Finding the First List Element That Passes a Test
- fork( )
- flushing output : 7.12. Flushing Output
- (see also processes)
- 16.0. Introduction
- 16.10. Communicating Between Related Processes
- 19.6. Executing Commands Without Shell Escapes
- avoiding zombies : 16.19. Avoiding Zombie Processes
- closing socket after : 17.9. Closing a Socket After Forking
- forking servers : 17.11. Forking Servers
- non-forking servers : 17.13. Non-Forking Servers
- pre-forking servers : 17.12. Pre-Forking Servers
- 16.0. Introduction
- (see also processes)
- forms (HTML) : 19.0. Introduction
- saving or emailing
: 19.13. Saving a Form to a File or Mail Pipe
- sticky widgets : 19.11. Creating Sticky Widgets
- submitting : 20.2. Automating Form Submission
- sticky widgets : 19.11. Creating Sticky Widgets
- saving or emailing
: 19.13. Saving a Form to a File or Mail Pipe
- Frame widget (Tk)
: 15.14. Creating Menus with Tk
- fresh hyperlinks, finding : 20.8. Finding Fresh Links
- Friedl, Jeffrey : 6.10. Speeding Up Interpolated Matches
- FTP clients : 18.2. Being an FTP Client
- full-screen mode : 15.0. Introduction
- functions : (see subroutines)
- fresh hyperlinks, finding : 20.8. Finding Fresh Links
- interpolating within strings
: 1.10. Interpolating Functions and Expressions Within Strings
- methods vs. : 13.9. Writing an Inheritable Class
- references to : 11.4. Taking References to Functions
- methods vs. : 13.9. Writing an Inheritable Class
- interpolating within strings
: 1.10. Interpolating Functions and Expressions Within Strings
- fuzzy matching
: 6.13. Approximate Matching
- fwdport program (example) : 17.18. Program: fwdport
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