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Index: Symbols

• && operator : Establishing a Default Value
• * to store filehandles
• • Introduction
  • Storing Filehandles in Variables
• @_ array : Accessing Subroutine Arguments
• (backslash)
• • escape characters : Escaping Characters
  • operator
  • • Passing Arrays and Hashes by Reference
    • Taking References to Scalars
• ` (backtick)
• • expanding : Interpolating Functions and Expressions Within Strings
  • operator
  • • Gathering Output from a Program
    • Executing Commands Without Shell Escapes
  • qx( ) : Specifying a List In Your Program
• (comma)
• • (see also CSV)
  • Printing a List with Commas
  • printing lists with commas : Printing a List with Commas
• $ variables
• • $` variable : Introduction
  • $^W variable : Using Classes as Structs
  • $+ variable : Introduction
  • $' variable : Introduction
  • $; variable : Recognizing Two Names for the Same File
  • $/ variable : Introduction
  • $_ variable
  • • accidental clobbering : Doing Something with Every Element in a List
    • outlawing unauthorized use
    • • Program: psgrep
      • Creating Magic Variables with tie
  • $| variable
  • • Introduction
    • Flushing Output
  • $1, $2, ... (backreferences) : Introduction
  • • finding duplicate words : Detecting Duplicate Words
• (dot) in numbers : Putting Commas in Numbers
• and ... (range) operators : Extracting a Range of Lines
• => (comma arrow) operator : Introduction
• =~ operator, s///, m//, and tr/// with : Accessing Substrings
• -> (infix) notation : Introduction
• -> operator : Introduction
• < > for globbing : Globbing, or Getting a List of Filenames Matching a Pattern
• < > (diamond) operator
• • Introduction
  • Writing a Filter
  • Introduction
  • Introduction
• < access mode : Introduction
• <&= and <& open modes : Opening and Closing File Descriptors by Number
• <=> (comparison) operator : Sorting an Array Numerically
• % for hashes : Introduction
• > access mode : Introduction
• >> access mode : Introduction
• / (root directory) : Introduction
• ~ (tilde) in filenames, expanding : Expanding Tildes in Filenames
• _ (file stat cache) : Introduction
• || operator : Establishing a Default Value
• ||= (assignment) operator : Establishing a Default Value
• "0 but not true"
• • Returning Failure
  • Writing a TCP Server
• -0 command-line option : Introduction
• "1 while" : Expanding and Compressing Tabs
• "500 Server Error", fixing : Fixing a 500 Server Error

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