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Index: F

• \f (formfeed) sequence: Escaped Sequences (Perl tutorial)
• @F array: Global Special Arrays and Hashes (Perl tutorial)
• • Special Variables in Alphabetical Order (Developing Perl)
• $^F variable: fileno (Developing Perl)
• • fileno (Developing Perl)
• -F command-line switch: Switches (Developing Perl)
• • Command-Line Options (Perl tutorial)
• -F option (dprofpp): The Perl Profiler (Perl tutorial)
• -f file test operator
• • File Test Operators (Perl tutorial)
• f command (debugger): Reference: f (Perl tutorial)
• failed matches, searching past position of: Progressive Matching (Developing Perl)
• fallback overloading key: (Developing Perl) 13.5. When an Overload Handler Is Missing (nomethod and fallback)
• false strings: Introduction (Perl tutorial)
• false values: Singularities (Developing Perl)
• FAQ, Perl online: Common Goofs for Novices (Developing Perl)
• FAQs, Perl-related: Frequently Asked Questions Lists (FAQs) (Perl tutorial)
• FastCGI: CGI::Fast (Perl tutorial)
• • World Wide Web (Developing Perl)
• FAT filesystems: Microsoft Windows/2000 (Perl for System Administration)
• Fatal module: Fatal (Perl tutorial)
• • Perl Language Extensions and Internals (Developing Perl)
• fcntl(): Doing Non-Blocking I/O (Perl tutorial)
• • Returning Failure (Perl tutorial)
  • Reference: fcntl (Perl tutorial)
  • fcntl (Developing Perl)
  • security risks associated with: Temporary Files (Developing Perl)
• fcntl syscall: Passing Filehandles (Developing Perl)
• Fcntl module: Nonblocking Filehandles (Advanced Perl Developing)
• • Fcntl (Perl tutorial)
  • Operating System Interfaces (Developing Perl)
• fdirs program (example): Processing All Files in a Directory Recursively (Perl tutorial)
• fdopen(): Opening and Closing File Descriptors by Number (Perl tutorial)
• fetch() (DBI): Reference: fetch (Perl tutorial)
• FETCH method: Tying Scalars (Advanced Perl Developing)
• • Creating Magic Variables with tie (Perl tutorial)
• fetchall_arrayref() (DBI): Reference: fetchall_arrayref (Perl tutorial)
• fetching URLs from Perl scripts: Fetching a URL from a Perl Script (Perl tutorial)
• fetchrow_array() (DBI): Reference: fetchrow_array (Perl tutorial)
• fetchrow_arrayref() (DBI): Reference: fetchrow_arrayref (Perl tutorial)
• fetchrow_hashref() (DBI): Reference: fetchrow_hashref (Perl tutorial)
• FetchURL() (Win32::Internet): Reference: FetchURL (Perl tutorial)
• -fg option (widgets): Common Widget Configuration Options (Perl tutorial)
• field declarations with use fields pragma: Field Declarations with use fields (Developing Perl)
• field separator, specifying different: Switches (Developing Perl)
• fieldholders: Formats (Perl tutorial)
• %FIELDS hash: Special Variables in Alphabetical Order (Developing Perl)
• fields module: fields (Perl tutorial)
• • Perl Language Extensions and Internals (Developing Perl)
• fifolog program (example): Making a Process Look Like a File with Named Pipes (Perl tutorial)
• FIFOs: Named Pipes (Developing Perl)
• • Making a Process Look Like a File with Named Pipes (Perl tutorial)
• __FILE__: Generating Perl in Other Languages (Developing Perl)
• • Other Literal Tokens (Developing Perl)
• file contents: Introduction (Perl tutorial)
• • Introduction (Perl tutorial)
  • adding records to wtmp file: Program: tailwtmp (Perl tutorial)
  • continually growing files, reading: Trailing a Growing File (Perl tutorial)
  • counting lines/paragraphs/records: in a File 8.2. Counting Lines (or Paragraphs or Records) (Perl tutorial)
  • deleting last line of: Removing the Last Line of a File (Perl tutorial)
  • extracting single line: Reading a Particular Line in a File (Perl tutorial)
  • fixed-length records: Introduction (Perl tutorial)
  • • Reading Fixed-Length Records (Perl tutorial)
  • modifying
  • • with -i option: Modifying a File in Place with -i Switch (Perl tutorial)
    • with temporary files: Modifying a File in Place with Temporary File (Perl tutorial)
    • without temporary files: Modifying a File in Place Without a Temporary File (Perl tutorial)
  • processing all words in: Processing Every Word in a File (Perl tutorial)
  • processing binary files: Processing Binary Files (Perl tutorial)
  • random access I/O: Using Random-Access I/O (Perl tutorial)
  • random lines from: Picking a Random Line from a File (Perl tutorial)
  • randomizing line order: Randomizing All Lines (Perl tutorial)
  • tctee program: Program: tctee (Perl tutorial)
  • text files as database arrays: Treating a Text File as a Database Array (Perl tutorial)
  • variable-length text fields: Processing Variable-Length Text Fields (Perl tutorial)
  • viewing lastlog file information: Program: laston (Perl tutorial)
• file descriptors: fileno (Developing Perl)
• • select (ready file descriptors) (Perl Developing)
  • filehandles, passing with: Passing Filehandles (Developing Perl)
  • opening/closing: Opening and Closing File Descriptors by Number (Perl tutorial)
  • passing through environment variable or command-line option: Passing Filehandles (Developing Perl)
  • returning for tied filehandles: Filehandle-Tying Methods (Developing Perl)
• File modules: Adaptor: An Introduction (Advanced Perl Developing)
• • database mapping: Multivalued Attributes and Database Mapping (Advanced Perl Developing)
  • File::Basename module: Splitting a Filename into Its Component Parts (Perl tutorial)
  • • File::Basename (Perl tutorial)
  • File::CheckTree module: File::CheckTree (Perl tutorial)
  • File::Compare module: File::Compare (Perl tutorial)
  • File::Copy module: Copying or Moving a File (Perl tutorial)
  • • File::Copy (Perl tutorial)
  • File::DosGlob module: File::DosGlob (Perl tutorial)
  • File::Find module: Processing All Files in a Directory Recursively (Perl tutorial)
  • • Removing a Directory and Its Contents (Perl tutorial)
    • File::Find (Perl tutorial)
  • File::KGlob module: Globbing, or Getting a List of Filenames Matching a Pattern (Perl tutorial)
  • File::LockDir module: Program: netlock (Perl tutorial)
  • File::Path module: File::Path (Perl tutorial)
  • File::Spec modules: File::Spec (Perl tutorial)
  • • File::Spec::Mac module: File::Spec::Mac (Perl tutorial)
    • File::Spec::Os2 module: File::Spec::OS2 (Perl tutorial)
    • File::Spec::Unix module: File::Spec::Unix (Perl tutorial)
    • File::Spec::VMS module: File::Spec::VMS (Perl tutorial)
    • File::Spec::Win32 module: File::Spec::Win32 (Perl tutorial)
  • File::Stat module: Trailing a Growing File (Perl tutorial)
  • • Introduction (Perl tutorial)
    • File::stat (Perl tutorial)
  • implementation of: Adaptor::File (Advanced Perl Developing)
  • object uniqueness and: Uniqueness of Objects in Memory (Advanced Perl Developing)
• file operations: Tracking Operations in Unix (Perl for System Administration)
• • Tracking Operations on Windows/2000 (Perl for System Administration)
  • • Unix: Tracking Operations in Unix (Perl for System Administration)
    • Windows/2000: Tracking Operations on Windows/2000 (Perl for System Administration)
• FILE operator: do (file) (Developing Perl)
• file shares, managing with ADSI: Working with File Shares via ADSI (Perl for System Administration)
• • • Windows/2000: Working with File Shares via ADSI (Perl for System Administration)
• file stat cache (_): Introduction (Perl tutorial)
• file test operators: File Test Operators (Perl tutorial)
• • Named Unary and File Test Operators (Developing Perl)
  • -p, checking for FIFO: Named Pipes (Developing Perl)
• • race conditions with: Handling Race Conditions (Developing Perl)
• __FILE__ token: Determining Current Function Name (Perl tutorial)
• • Global Special Constants (Perl tutorial)
• FileCache module: Caching Open Output Filehandles (Perl tutorial)
• • FileCache (Perl tutorial)
• file conversions, Perl modules for: The CPAN modules Directory (Developing Perl)
• File::Basename module: Files and Filesystems (Developing Perl)
• • Filenames, Filesystems, and File Locking (Developing Perl)
• File::CheckTree module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::chmod module: chmod (Developing Perl)
• File::Compare module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::Copy module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::DosGlob module: Filenames, Filesystems, and File Locking (Developing Perl)
• File\:\:Find module
• • finding hidden directories with: Local Signs of Peril (Perl for System Administration)
  • on Mac OS: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
  • on Unix: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
  • on Windows: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
  • when not to use: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
• filenames, long, finding: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
• • auditing on Windows/2000: Tracking Operations on Windows/2000 (Perl for System Administration)
  • changes to, detecting: Local Filesystem Changes (Perl for System Administration)
  • • core: Walking or Traversing the Filesystem (Perl for System Administration)
    • damaged: Walking or Traversing the Filesystem (Perl for System Administration)
    • extraneous: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
    • Windows/2000 hidden: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
  • locking: Account System Wrap-Up (Perl for System Administration)
  • log (see log files)
  • open, tracking: Tracking Operations on Windows/2000 (Perl for System Administration)
  • writing to, security of: Security in log processing programs (Perl for System Administration)
• File::Glob module: Filenames, Filesystems, and File Locking (Developing Perl)
• fileglob operator: Filename Globbing Operator (Developing Perl)
• FileHandle module: Filehandles, Directory Handles, and Formats (Advanced Perl Developing)
• • Localizing Filehandles (Advanced Perl Developing)
  • Introduction (Perl tutorial)
  • FileHandle (Perl tutorial)
  • Format Variables (Developing Perl)
  • Accessing Formatting Internals (Developing Perl)
  • Filehandle, Directory Handle, and Stream I/O Utilities (Developing Perl)
• filehandle-tying: Filehandle-Tying Methods (Developing Perl)
• filehandles: Filehandles, Formats (Advanced Perl Developing)
• • Filehandles, Directory Handles, and Formats (Advanced Perl Developing)
  • Introduction (Perl tutorial)
  • Filehandles (Perl tutorial)
  • Filehandles (Developing Perl)
  • anonymous: Handle References (Developing Perl)
  • angle operator and: Operator (Developing Perl) 2.11.2. Line Input (Angle)
  • caching open filehandles: Caching Open Output Filehandles (Perl tutorial)
  • copying: Copying Filehandles (Perl tutorial)
  • creating: Filehandles (Developing Perl)
  • duplicating, reasons for: open (Developing Perl)
  • dynamic binding: Tying Filehandles (Advanced Perl Developing)
  • ending with _TOP: Formats (Developing Perl)
  • • Special Variables in Alphabetical Order (Developing Perl)
  • file locks on: File Locking (Developing Perl)
  • formats associated with, default names of: Formats (Developing Perl)
  • functions dealing with: Perl Functions by Category (Developing Perl)
  • functions for: Perl Functions by Category (Perl tutorial)
  • implicit referencing in: What Is a Reference? (Developing Perl)
  • indirect: Glossary (Developing Perl)
  • local: Localizing Filehandles (Advanced Perl Developing)
  • • Storing Filehandles in Variables (Perl tutorial)
    • Saving Global Values (Perl tutorial)
    • creating: local (Developing Perl)
  • localizing: Typeglobs and Filehandles (Developing Perl)
  • modules/packages and: Basic Package (Advanced Perl Developing)
  • names for: Names (Developing Perl)
  • networking and: IO Objects and Filehandles (Advanced Perl Developing)
  • non-blocking I/O: Doing Non-Blocking I/O (Perl tutorial)
  • nonblocking: Nonblocking Filehandles (Advanced Perl Developing)
  • object methods for, using: Filehandle, Directory Handle, and Stream I/O Utilities (Developing Perl)
  • open function: open (Developing Perl)
  • passing: Passing Filehandles to Subroutines (Advanced Perl Developing)
  • • Storing Filehandles in Variables (Perl tutorial)
    • Saving Global Values (Perl tutorial)
    • Determining the Caller's Package (Perl tutorial)
    • Prototypes (Developing Perl)
  • passing in IPC: Passing Filehandles (Developing Perl)
  • • through standard filehandles: Passing Filehandles (Developing Perl)
  • piped, explicitly closing: open (Developing Perl)
  • positioning file pointer for: seek (Developing Perl)
  • print() and
  • printing to multiple simultaneously: Printing to Many Filehandles Simultaneously (Perl tutorial)
  • reading bytes of data from: read (Developing Perl)
  • reading from: Reading from Many Filehandles Without Blocking (Perl tutorial)
  • references to: Handle References (Developing Perl)
  • reporting filenames in errors: Making Perl Report Filenames in Errors (Perl tutorial)
  • selecting for output: select (output filehandle) (Developing Perl)
  • SelectSaver module: Filehandle, Directory Handle, and Stream I/O Utilities (Developing Perl)
  • special (predefined): Global Special Filehandles (Perl tutorial)
  • • Filehandle Special Variables (Perl tutorial)
  • storing as variables: Introduction (Perl tutorial)
  • • Storing Filehandles in Variables (Perl tutorial)
  • syslog tying output to: Tie Modules on CPAN (Developing Perl)
  • tied: Creating Magic Variables with tie (Perl tutorial)
  • tying: Tying Filehandles (Developing Perl)
  • • creative filehandles: Creative Filehandles (Developing Perl)
    • methods for: Filehandle-Tying Methods (Developing Perl)
  • typeglobs for: Typeglobs and Filehandles (Developing Perl)
  • use instead of filenames, security benefits of: Handling Race Conditions (Developing Perl)
• filename globbing operator (see glob operator)
• filenames
• • Other Literal Tokens (Developing Perl)
  • & (ampersand) in: open (Developing Perl)
  • changing name of: rename (Developing Perl)
  • expanding tildes in: Expanding Tildes in Filenames (Perl tutorial)
  • expansions of: glob (Developing Perl)
  • external data in, security risks of: Cleaning Up Your Environment (Developing Perl)
  • filtering as input: Writing a Filter (Perl tutorial)
  • getting from symbolic links: readlink (Developing Perl)
  • globbing: System Interaction (Developing Perl)
  • %INC hash of: Special Variables in Alphabetical Order (Developing Perl)
  • iterating scripts over: Command-Line Options (Perl tutorial)
  • linking symbolically: symlink (Developing Perl)
  • linking with hard links: link (Developing Perl)
  • matching with patterns: Globbing, or Getting a List of Filenames Matching a Pattern (Perl tutorial)
  • mode, separating from: open (Developing Perl)
  • multiple, for same file: Recognizing Two Names for the Same File (Perl tutorial)
  • parsing: Splitting a Filename into Its Component Parts (Perl tutorial)
  • renaming: Renaming Files (Perl tutorial)
  • reporting in errors: Making Perl Report Filenames in Errors (Perl tutorial)
  • sorting: Introduction (Perl tutorial)
  • • Program: lst (Perl tutorial)
  • strange, opening files with: Opening Files with Unusual Filenames (Perl tutorial)
  • viewing different program or eval statement: Locating Code (Developing Perl)
• fileno(): IO Objects and Filehandles (Advanced Perl Developing)
• • Reference: fileno (Perl tutorial)
• fileno function: fileno (Developing Perl)
• File::Path module: Filenames, Filesystems, and File Locking (Developing Perl)
• fileparse(): Splitting a Filename into Its Component Parts (Perl tutorial)
• • access: Introduction (Perl tutorial)
  • • Introduction (Perl tutorial)
  • access and modification times: stat (Developing Perl)
  • • utime (Developing Perl)
  • accessing under reduced privileges: Accessing Commands and Files Under Reduced Privileges (Developing Perl)
  • ages for: Named Unary and File Test Operators (Developing Perl)
  • as arrays (example): TIEARRAY Example: File as an Array (Advanced Perl Developing)
  • changing name of: rename (Developing Perl)
  • closing: close (Developing Perl)
  • copying: Copying or Moving a File (Perl tutorial)
  • core: Switches (Developing Perl)
  • core files: Command-Line Options (Perl tutorial)
  • deleting: Deleting a File (Perl tutorial)
  • • unlink (Developing Perl)
  • do FILE operator: (Developing Perl) 29.2.27. do (file)
  • end-of-file: eof (Developing Perl)
  • extracting columns from (example): Extracting Columns from a File (Advanced Perl Developing)
  • flushing output: Flushing Output (Perl tutorial)
  • functions dealing with: Perl Functions by Category (Developing Perl)
  • functions for: Perl Functions by Category (Perl tutorial)
  • getting statistics of: stat (Developing Perl)
  • in interprocess communication: Files (Developing Perl)
  • • locking mechanisms: File Locking (Developing Perl)
    • passing filehandles: Passing Filehandles (Developing Perl)
  • lexically scoped variables and: Name Lookups (Developing Perl)
  • locking: Locking a File (Perl tutorial)
  • • Program: netlock (Perl tutorial)
    • region-specific locks: Program: lockarea (Perl tutorial)
  • modules, autoloading: Autoloading (Developing Perl)
  • modules for cross-platform access methods: Filenames, Filesystems, and File Locking (Developing Perl)
  • modules/packages and: Packages and Files (Advanced Perl Developing)
  • moving: Copying or Moving a File (Perl tutorial)
  • non-blocking I/O: Doing Non-Blocking I/O (Perl tutorial)
  • open function: open (Developing Perl)
  • opening: Opening a File (Perl tutorial)
  • opening via low-level system call: sysopen (Developing Perl)
  • ownership and group, changing: chown (Developing Perl)
  • path components, separators for: Files and Filesystems (Developing Perl)
  • Perl module, housing in single: Packages (Developing Perl)
  • Perl modules for: The CPAN modules Directory (Developing Perl)
  • • The CPAN modules Directory (Developing Perl)
  • permissions
  • • chmod (Developing Perl)
    • sysopen (Developing Perl)
    • umask (Developing Perl)
  • portably opening: System Interaction (Developing Perl)
  • printing to multiple filehandles: Printing to Many Filehandles Simultaneously (Perl tutorial)
  • processing all files in directories: Processing All Files in a Directory (Perl tutorial)
  • • Processing All Files in a Directory Recursively (Perl tutorial)
  • read in binary mode: binmode (Developing Perl)
  • reading: Determining the Number of Bytes to Read (Perl tutorial)
  • • Reading Lines with Continuation Characters (Perl tutorial)
    • Reading a String from a Binary File (Perl tutorial)
    • Reading Configuration Files (Perl tutorial)
    • from multiple filehandles: Reading from Many Filehandles Without Blocking (Perl tutorial)
    • hash records: Reading and Writing Hash Records to Text Files (Perl tutorial)
  • reading via low-level system call: sysread (Developing Perl)
  • renaming, program for: eval (Developing Perl)
  • returning current position for: tell (Developing Perl)
  • scopes: Lexically Scoped Variables: my (Developing Perl)
  • statistics about
  • storing in program text: Storing Files Inside Your Program Text (Perl tutorial)
  • symbolically linking: symlink (Developing Perl)
  • temporary: Creating Temporary Files (Perl tutorial)
  • test operators: Some File Test Operators (Developing Perl)
  • testing: Testing a File for Trustworthiness (Perl tutorial)
  • testing for existence
  • text/binary distinction: open (Developing Perl)
  • timestamps of: Getting and Setting Timestamps (Perl tutorial)
  • truncating: truncate (Developing Perl)
  • Win32API::File module: Microsoft-Related Modules (Developing Perl)
  • writing via low-level system call: syswrite (Developing Perl)
• File::Spec module: Files and Filesystems (Developing Perl)
• • Filenames, Filesystems, and File Locking (Developing Perl)
• File\:\:Spec module: Dealing with Filesystem Differences from Perl (Perl for System Administration)
• File::Spec::Functions module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::Spec::Mac module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::Spec::OS2 module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::Spec::Unix module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::Spec::VMS module: Filenames, Filesystems, and File Locking (Developing Perl)
• • Filenames, Filesystems, and File Locking (Developing Perl)
• File::Spec::Win32 module: Filenames, Filesystems, and File Locking (Developing Perl)
• File::stat module: Filenames, Filesystems, and File Locking (Developing Perl)
• Filesys\:\:Df module: Querying Filesystem Usage (Perl for System Administration)
• Filesys\:\:DiskFree module: Querying Filesystem Usage (Perl for System Administration)
• Filesys\:\:DiskSpace module: Querying Filesystem Usage (Perl for System Administration)
• • Berkeley Fast File System: Unix (Perl for System Administration)
  • differences between: Filesystem Differences (Perl for System Administration)
  • FAT: Microsoft Windows/2000 (Perl for System Administration)
  • Mac OS: MacOS (Perl for System Administration)
  • NTFS: Microsoft Windows/2000 (Perl for System Administration)
  • querying usage: Querying Filesystem Usage (Perl for System Administration)
  • traversing/walking
  • • Mac OS: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
    • Unix: Walking or Traversing the Filesystem (Perl for System Administration)
    • Windows/2000: Walking or Traversing the Filesystem (Perl for System Administration)
  • Unix: Unix (Perl for System Administration)
  • VFAT: Microsoft Windows/2000 (Perl for System Administration)
  • Windows/2000
  • • finding damaged files on: Walking or Traversing the Filesystem (Perl for System Administration)
• -fill option (pack geometry manager): The pack Geometry Manager (Perl tutorial)
• FillAttr() (Win32::Console): Reference: FillAttr (Perl tutorial)
• FillChar() (Win32::Console): Reference: FillChar (Perl tutorial)
• filled fields: Formats (Perl tutorial)
• filtering filenames as input: Writing a Filter (Perl tutorial)
• filtering output: Filtering Your Own Output (Perl tutorial)
• filtering output with forking open: Talking to Yourself (Developing Perl)
• • Source Filters (Developing Perl)
• find(): Canvas Methods (Perl tutorial)
• • Regular Expressions (Developing Perl)
  • traversing file trees like: Filenames, Filesystems, and File Locking (Developing Perl)
• Find module: File::Find (Perl tutorial)
• FindBin module: Keeping Your Own Module Directory (Perl tutorial)
• • FindBin (Perl tutorial)
  • Module Installation Support (Developing Perl)
• finddepth(): Removing a Directory and Its Contents (Perl tutorial)
• finding most common anything: Finding the Most Common Anything (Perl tutorial)
• findlogin program (example): Writing a Filter (Perl tutorial)
• find2perl command: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
• • • finding damaged files on: Walking the Filesystem Using the File::Find Module (Perl for System Administration)
• findstr function: Regular Expressions (Developing Perl)
• • Regular Expressions (Developing Perl)
• Finger: Finger: A Simple Directory Service (Perl for System Administration)
• • • finding damaged files on: Finger: A Simple Directory Service (Perl for System Administration)
• finish() (DBI): Reference: finish (Perl tutorial)
• FIONREAD call: Determining the Number of Bytes to Read (Perl tutorial)
• firewalls, connecting through: Program: fwdport (Perl tutorial)
• FIRSTKEY method: Tying Hashes (Advanced Perl Developing)
• first_labeled_message() (Mail::Folder): Reference: first_labeled_message (Perl tutorial)
• first_message() (Mail::Folder): Reference: first_message (Perl tutorial)
• fisher_yates_shuffle(): Randomizing an Array (Perl tutorial)
• fixed 8-bit chracters: Building Character (Developing Perl)
• fixed-length data/records: Introduction (Perl tutorial)
• • Reading Fixed-Length Records (Perl tutorial)
  • Perl Functions by Category (Perl tutorial)
• fixed-precision numeric fields: Formats (Perl tutorial)
• FixNum class: Overloading Operators (Perl tutorial)
• fixstyle program (example): Program: fixstyle (Perl tutorial)
• flags: The CPAN modules Directory (Developing Perl)
• • Pattern Modifiers (Developing Perl)
  • Switches (Developing Perl)
  • (see also modifiers)
• flash()
• • Button widget: Button Methods (Perl tutorial)
  • Checkbutton widget: Checkbutton Methods (Perl tutorial)
  • Radiobutton widget: Radiobutton Methods (Perl tutorial)
• flattened lists: Introduction (Perl tutorial)
• floating-point numbers: Introduction (Perl tutorial)
• • Scalar Values (Developing Perl)
  • pack (Developing Perl)
  • comparing: Comparing Floating-Point Numbers (Perl tutorial)
  • computer storage, order of: Endianness and Number Width (Developing Perl)
  • Math::BigFloat module: Data Types (Developing Perl)
  • rand function, returning: rand (Developing Perl)
  • rounding: Rounding Floating-Point Numbers (Perl tutorial)
• flock(): Locking a File (Perl tutorial)
• • Program: netlock (Perl tutorial)
  • Reference: flock (Perl tutorial)
• flock function: Scalar-Tying Methods (Developing Perl)
• • File Locking (Developing Perl)
  • flock (Developing Perl)
  • alarms and: Timing Out Slow Operations (Developing Perl)
• floor(): Rounding Floating-Point Numbers (Perl tutorial)
• flow control functions: Perl Functions by Category (Perl tutorial)
• flow of program control, functions for: Perl Functions by Category (Developing Perl)
• F<> interior sequence (pod): Interior sequences (Perl tutorial)
• flush(): Adaptor: An Introduction (Advanced Perl Developing)
• • Adaptor::DBI module: Storing objects (Advanced Perl Developing)
  • Adaptor::File module: Storing objects (Advanced Perl Developing)
• flushing buffers: Special Variables in Alphabetical Order (Developing Perl)
• flushing output: Flushing Output (Perl tutorial)
• fmt program: Reformatting Paragraphs (Perl tutorial)
• fmt (Unix utility): Format Variables (Developing Perl)
• FMTEYEWTK tutorials: Implementing Complex Data Structures (Advanced Perl Developing)
• • Resources (Advanced Perl Developing)
• FNDELAY flag: Nonblocking Filehandles (Advanced Perl Developing)
• focus() (Canvas): Canvas Methods (Perl tutorial)
• focusmodel() (Frame widget): Toplevel Methods (Perl tutorial)
• folded_demo program (example): Creating Magic Variables with tie (Perl tutorial)
• foldername() (Mail::Folder): Reference: foldername (Perl tutorial)
• -font option (widgets): Common Widget Configuration Options (Perl tutorial)
• fonts,: The CPAN modules Directory (Developing Perl)
• fonts, widget: Colors and Fonts (Perl tutorial)
• foodfind program: Inverting a Hash (Perl tutorial)
• footers: Footers (Developing Perl)
• =for command (pod): Reference: =for (Perl tutorial)
• =for escape pod directive: Documenting Your Module with Pod (Perl tutorial)
• for modifier: Simple Statements (Developing Perl)
• • for Loops (Developing Perl)
• for, as an alias of foreach: foreach Loops (Developing Perl)
• for loops
• • for loops (Perl tutorial)
  • The for statement (Developing Perl)
  • searching and replacing elements in arrays: Modifying strings en passant (Developing Perl)
• force command (CPAN.pm): Reference: force (Perl tutorial)
• foreach loops: Efficient parameter passing (Advanced Perl Developing)
• • Finding the First List Element That Passes a Test (Perl tutorial)
  • foreach loops (Perl tutorial)
  • The foreach statement (Developing Perl)
  • foreach Loops (Developing Perl)
  • Time Efficiency (Developing Perl)
  • aliasing capability, using: Case Structures (Developing Perl)
  • loop variable, Perl vs. shell developing: Shell Traps (Developing Perl)
  • Perl versions, changes in: Previous Perl Traps (Developing Perl)
  • searching and replacing elements in arrays: Modifying strings en passant (Developing Perl)
• -foreground option (widgets): Common Widget Configuration Options (Perl tutorial)
• foreach modifier: Simple Statements (Developing Perl)
• foreign keys: Object Associations (Advanced Perl Developing)
• fork(): Multiple Threads of Execution (Advanced Perl Developing)
• • Introduction (Perl tutorial)
  • Communicating Between Related Processes (Perl tutorial)
  • Executing Commands Without Shell Escapes (Perl tutorial)
  • fork (Developing Perl)
  • Reference: fork (Perl tutorial)
  • avoiding zombies: Avoiding Zombie Processes (Perl tutorial)
  • closing socket after: Closing a Socket After Forking (Perl tutorial)
  • child processes, inheriting parent filehandles: Passing Filehandles (Developing Perl)
  • fork-open: Talking to Yourself (Developing Perl)
  • locks, inheriting across calls to: flock (Developing Perl)
• forks: Multiple Threads of Execution (Advanced Perl Developing)
• • open (Developing Perl)
  • cloned interpreter on Windows: The Process Model (Developing Perl)
  • fork open: open (Developing Perl)
  • forking servers: Forking Servers (Perl tutorial)
  • non-forking servers: Non-Forking Servers (Perl tutorial)
  • open command, two-argument form: open (Developing Perl)
  • pre-forking servers: Pre-Forking Servers (Perl tutorial)
• Form collection: The Request Object (Perl tutorial)
• form feed: Special Variables in Alphabetical Order (Developing Perl)
• :form method group: Importing Method Groups (Perl tutorial)
• form object (PerlScript): The Document Object (Perl tutorial)
• <FORM> tags: Typical CGI Interaction (Perl tutorial)
• formal arguments: Special Variables in Alphabetical Order (Developing Perl)
• format()
• • HTML::FormatPS module: HTML::FormatPS (Perl tutorial)
  • HTML::FormatText module: HTML::FormatText (Perl tutorial)
  • Mail::Address module: Reference: format (Perl tutorial)
  • declaration: format (Developing Perl)
  • output accumulator: formline (Developing Perl)
• $FORMAT_FORMFEED: Special Variables in Alphabetical Order (Developing Perl)
• format output accumulator: Global Special Variables (Perl tutorial)
• $FORMAT_FORMFEED ($^L) variable: Global Special Variables (Perl tutorial)
• format keyword: Formats (Perl tutorial)
• $FORMAT_LINE_BREAK_CHARACTERS
• • Global Special Variables (Perl tutorial)
  • Special Variables in Alphabetical Order (Developing Perl)
• $FORMAT_LINES_LEFT: Special Variables in Alphabetical Order (Developing Perl)
• $FORMAT_LINEFEED: Global Special Variables (Perl tutorial)
• $FORMAT_LINES_LEFT ($-) variable
• • Filehandle Special Variables (Perl tutorial)
  • $FORMAT_LINES_PER_PAGE: Special Variables in Alphabetical Order (Developing Perl)
  • $FORMAT_LINES_PER_PAGE ($=) variable
  • • Filehandle Special Variables (Perl tutorial)
  • $FORMAT_NAME: Special Variables in Alphabetical Order (Developing Perl)
  • $FORMAT_NAME ($~) variable
  • • Filehandle Special Variables (Perl tutorial)
  • $FORMAT_PAGE_NUMBER: Special Variables in Alphabetical Order (Developing Perl)
  • $FORMAT_PAGE_NUMBER ($%) variable
  • • Filehandle Special Variables (Perl tutorial)
• formats
• • Formats (Perl tutorial)
  • Formats (Developing Perl)
  • accessing formatting internals: Accessing Formatting Internals (Developing Perl)
  • argument lists for, evaluating in list context: Previous Perl Traps (Developing Perl)
  • B::Xref module, cross-references with C: Code Development Tools (Developing Perl)
  • characters in: pack (Developing Perl)
  • declaring: Formats (Developing Perl)
  • fmt (Unix utility): Format Variables (Developing Perl)
  • footers: Footers (Developing Perl)
  • for strings: sprintf (Developing Perl)
  • integers: pack (Developing Perl)
  • lexical variables in: Formats (Developing Perl)
  • names of formats
  • pack/unpack: pack (Developing Perl)
  • top-of-form processing: Formats (Developing Perl)
  • variables: Format Variables (Developing Perl)
• $FORMAT_TOP_NAME: Special Variables in Alphabetical Order (Developing Perl)
• $FORMAT_TOP_NAME ($^) variable
• • Filehandle Special Variables (Perl tutorial)
• formline(): Reference: formline (Perl tutorial)
• • formline (Developing Perl)
  • Accessing Formatting Internals (Developing Perl)
• forms, HTML: Introduction (Perl tutorial)
• • saving or emailing: Saving a Form to a File or Mail Pipe (Perl tutorial)
  • sticky widgets: Creating Sticky Widgets (Perl tutorial)
  • submitting: Automating Form Submission (Perl tutorial)
• Fortran: Molecules (Developing Perl)
• fping program: Perl Saves the Day (Perl for System Administration)
• • • finding damaged files on: Perl Saves the Day (Perl for System Administration)
• fractal-drawing example: Example: Fractals with Perl (Advanced Perl Developing)
• • Detour into Fractals (Advanced Perl Developing)
• fraction() (Scrollbar): Scrollbar Methods (Perl tutorial)
• frag() (URI::URL): Reference: frag (Perl tutorial)
• frame() (Frame widget): Toplevel Methods (Perl tutorial)
• frame object (PerlScript): Client-Side PerlScript (Perl tutorial)
• frame option (debugger): Debugger Options (Developing Perl)
• Frame widgets (Perl/Tk): Frame (Advanced Perl Developing)
• • Creating Menus with Tk (Perl tutorial)
  • The Frame Widget (Perl tutorial)
• FrameMaker, translating pod to: Reference: pod2fm (Perl tutorial)
• free-form languages: Molecules (Developing Perl)
• Free() (Win32::Console): Reference: Free (Perl tutorial)
• FreeTDS libraries: Interacting with an SQL Server from Perl (Perl for System Administration)
• • • finding damaged files on: Interacting with an SQL Server from Perl (Perl for System Administration)
• freeze function: RPC: Implementation (Advanced Perl Developing)
• FreezeThaw module: FreezeThaw (Advanced Perl Developing)
• • Network Service Changes (Perl for System Administration)
  • • finding damaged files on: Network Service Changes (Perl for System Administration)
• fresh hyperlinks, finding: Finding Fresh Links (Perl tutorial)
• fresh_until() (HTTP::Response): Reference: fresh_until (Perl tutorial)
• freshness_lifetime() (HTTP::Response): Reference: freshness_lifetime (Perl tutorial)
• Friedl, Jeffrey: Speeding Up Interpolated Matches (Perl tutorial)
• from() (LWP::UserAgent): Reference: from (Perl tutorial)
• -from option (Scale): The Scale Widget (Perl tutorial)
• F_SETFL command: Nonblocking Filehandles (Advanced Perl Developing)
• failure, returning from subroutines: Returning Failure (Perl tutorial)
• FTP (File Transfer Protocol): Being an FTP Client (Perl tutorial)
• • FTP (Perl tutorial)
  • FTP module: Net::FTP (Advanced Perl Developing)
  • Net::FTP module: Net::FTP (Perl tutorial)
  • Net::Netrc module: FTP Configuration with Net::Netrc (Perl tutorial)
  • obtaining code examples: FTP (Advanced Perl Developing)
  • obtaining Perl: The CPAN Architecture (Perl tutorial)
  • Win32::Internet functions for: FTP Functions (Perl tutorial)
• FTP transfers, correlating: Read-Remember-Process (Perl for System Administration)
• • • finding damaged files on: Read-Remember-Process (Perl for System Administration)
• FTP() (Win32::Internet): Reference: FTP (Perl tutorial)
• FTPMAIL, obtaining code examples: FTPMAIL (Advanced Perl Developing)
• full-screen mode: Introduction (Perl tutorial)
• full_path() (URI::URL): Reference: full_path (Perl tutorial)
• fully-qualified names: Names (Developing Perl)
• func() (DBI): Reference: func (Perl tutorial)
• function calls: (Developing Perl) 3.1. Terms and List Operators (Leftward)
• • Bidirectional Communication (Developing Perl)
• function templates, closures as: Closures as function templates (Developing Perl)
• functions: Verbs (Developing Perl)
• • Subroutines (Developing Perl)
  • Functions (Developing Perl)
  • Functions (Developing Perl)
  • autoloading: Autoloading (Developing Perl)
  • • Method Autoloading (Developing Perl)
  • built-in, listing by type: Documentation Support (Developing Perl)
  • built-in (Perl): Function Reference (Perl tutorial)
  • • listed alphabetically: Perl Functions in Alphabetical Order (Perl tutorial)
    • listed by category: Perl Functions by Category (Perl tutorial)
    • socket-related: Built-in Socket Functions (Perl tutorial)
  • by category: Perl Functions by Category (Developing Perl)
  • byte-oriented wrappers for: Effects of Character Semantics (Developing Perl)
  • C library: Functions (Developing Perl)
  • debugger, calling internal: Customizing with Init Files (Developing Perl)
  • debugger customization: Writing Your Own Debugger (Developing Perl)
  • default arguments, avoiding errors with: Frequently Ignored Advice (Developing Perl)
  • for overloading: Public Overload Functions (Developing Perl)
  • generation of: Closures (Developing Perl)
  • hashes of: Hashes of Functions (Developing Perl)
  • in list or scalar context: Functions (Developing Perl)
  • interpolating: Notational Convenience (Developing Perl)
  • interpolating within strings: Interpolating Functions and Expressions Within Strings (Perl tutorial)
  • loading
  • • AutoLoader module: AutoLoader (Perl tutorial)
    • DynaLoader module: DynaLoader (Perl tutorial)
    • SelfLoader module: SelfLoader (Perl tutorial)
  • methods vs.: Writing an Inheritable Class (Perl tutorial)
  • modules, exporting to programs: Module Privacy and the Exporter (Developing Perl)
  • named unary operators: Named Unary and File Test Operators (Developing Perl)
  • names for: Developing with Style (Developing Perl)
  • operators and: Unary and Binary Operators (Developing Perl)
  • overriding: Overriding Built-in Functions (Developing Perl)
  • Perl, varying across platforms: Portable Perl (Developing Perl)
  • Perl, wrapping around C: XS and XSUBs (Developing Perl)
  • references to: Taking References to Functions (Perl tutorial)
  • references, using for both input and output: Passing References (Developing Perl)
  • return operators in: Loop Control (Developing Perl)
  • returning tainted data: Perl Functions in Alphabetical Order (Developing Perl)
  • signal-handling: Signals (Developing Perl)
  • socket-related in Perl: Sockets (Developing Perl)
  • SWIG: SWIG Features (Advanced Perl Developing)
  • temporary filenames, generating: Temporary Files (Developing Perl)
  • Thread module: The Thread Module (Developing Perl)
• funny characters: Tied Variables (Developing Perl)
• future of Perl: Peek into the Future (Advanced Perl Developing)
• fuzzy matching: Approximate Matching (Perl tutorial)
• fwdport program (example): Program: fwdport (Perl tutorial)

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