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Index: F

• -f operator : The -x File Tests
• false
• • definition of : The if/unless Statement
  • regular expressions and : Simple Uses of Regular Expressions
• Fast module : Embedded Perl
• field definition line, introduced : Listing the Secret Words
• field value line, introduced : Listing the Secret Words
• fieldlines of format : Defining a Format
• filehandles
• • Moving the Secret Word List into a Separate File
  • What Is a Filehandle?
  • default : Using Filehandles
  • formats and : Invoking a Format
  • indirect : Globbing
  • print( ) operator and : Warning Someone When Things Go Astray
  • as processes : Using Processes as Filehandles
  • read( ) parameters : Fixed-Length Random Access Databases
  • reading from : Using Filehandles
  • seek( ) parameters : Fixed-Length Random Access Databases
  • uppercase : Moving the Secret Word List into a Separate File
• filename glob : Many Secret Word Files in the Current Directory
• files
• • age, example of : Ensuring a Modest Amount of Security
  • appending to : Opening and Closing a Filehandle
  • information about, with stat( ) : The stat and lstat Functions
  • linking : Creating Alternate Names for a File: Linking
  • modifying permissions/ownership : Modifying Permissions
  • modifying timestamps of : Modifying Timestamps
  • opening : Opening and Closing a Filehandle
  • removing : Removing a File
  • renaming : Renaming a File
  • testing for existence : The -x File Tests
• filled fields, in formats : Filled Fields
• find command : Reading a Directory Handle
• finding substrings : Finding a Substring
• floating-point exception, as a signal to a process : Sending and Receiving Signals
• floating-point numbers
• • All Numbers Use the Same Format Internally
  • Float Literals
• footnotes, meaning of : Conventions Used in this tutorial
• for statement : The for Statement
• • example of
  • • Control Structures
    • Labeled Blocks
• for( ) operator, example of : Converting Other Languages to Perl
• foreach statement
• • Maintaining a Last-Good-Guess Database
  • The foreach Statement
  • example of
  • • Control Structures
    • Hashes
    • Directory Access
    • System Database Access
    • The Final Programs
    • Reading a Directory Handle
    • Using a DBM Hash
• foreach( ) operator, example of : Basic I/O
• fork operator : Using fork
• fork( ) system call : Using fork
• :form import tag : Less Typing
• <FORM> tags : Your CGI Program in Context
• format definition
• • examples of
  • • Formats
    • Listing the Secret Words
  • location in source file : Defining a Format
• format keyword
• • Listing the Secret Words
  • Defining a Format
  • example of : The Final Programs
• format names
• • changing : Changing the Format Name
  • selecting : Defining a Format
• formats : What Is a Format?
• • changing top-of-page format name : Changing the Top-of-Page Format Name
  • constant part : What Is a Format?
  • defining : Defining a Format
  • defining text fields : Text Fields
  • fieldholders and fieldlines : Defining a Format
  • invoking : Invoking a Format
  • multi-line fieldholder : Multiline Fields
  • templates for : Defining a Format
  • top-of-page : The Top-of-Page Format
  • variable part : What Is a Format?
  • whitespace within : Defining a Format
• formatted output, printf( ) and : Using printf for Formatted Output
• formfeed, and top-of-page format : The Top-of-Page Format
• forms, HTML
• • Your CGI Program in Context
  • Form Generation
  • elements of : Other Form Elements
• FTP : FTP
• FTPMAIL : FTPMAIL
• functions, importing to CGI programs : Less Typing

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