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Index: Symbols and Numbers
- -0 switch, perl : Switches
- & (ampersand) : Named Unary and File Test Operators
-
- && (AND) operator : C-style Logical (Short Circuit) Operators
- &&= (assignment) operator : Assignment Operators
- &= (assignment) operator : Assignment Operators
- address-of operator (in C) : Operators Missing from Perl
- bitwise AND operator : Bitwise Operators
- in filenames : open
- prototype character : Prototypes
- for subroutine names
- * (asterisk) : Named Unary and File Test Operators
-
- ** (exponentiation) operator : Exponentiation
- **= (assignment) operator : Assignment Operators
- *= (assignment) operator : Assignment Operators
- dereference operator (in C) : Operators Missing from Perl
- for typeglob names : Passing Symbol Table Entries (Typeglobs)
- multiplicative operator : Multiplicative Operators
- prototype character : Prototypes
- quantifier
- for typeglob names : Typeglobs and Filehandles
- @ (at sign) : Previous Perl Traps
-
- @_ array
- for array names : Variables
- in debugger : Using the Debugger
- in picture lines : Formats
- prototype character : Prototypes
- (backslash)
-
- to escape metacharacters : The regular expression bestiary
- for multiline commands : Using the Debugger
- quotemeta function for : quotemeta
- reference operator
- ` (backtick) : Anonymous pipes
-
- emulating : Cleaning up your path
- operator
- ! (bang)
-
- !! debugger command : Debugger Commands
- != (not equal to) operator
- !~ (binding) operator : Binding Operators
- for argument specifiers : Getopt::Long - Extended Processing of Command-Line Options
- debugger command : Debugger Commands
- in import list : Specialized import lists
- logical negation operator : Ideographic Unary Operators
- {} (braces)
-
- Braces, Brackets, and Quoting
- Universal Blunders
- Developing with Style
- in awk : Awk Traps
- for statement blocks : Compound Statements
- hash composer : The Anonymous Hash Composer
- identifiers in : String literals
- quantifier
- [] (brackets)
-
- array composer : The Anonymous Array Composer
- to match characters : The rules of regular expression matching
- ^ (caret)
-
- ^= (assignment) operator : Assignment Operators
- assertion : Quantifiers
- bitwise XOR operator
- line boundary
- matching : The rules of regular expression matching
- in picture lines : Formats
- (colon)
-
- :: for package identifiers
- in import list : Specialized import lists
- (comma) : Universal Blunders
-
- delimiting list values : List Values and Arrays
- key/value pairs and : Hashes (Associative Arrays)
- large numbers and : Numeric literals
- operator
-
- (see also = (equal sign), => operator)
- Comma Operators
- Awk Traps
- $ (dollar sign)
-
- $# prefix : List Values and Arrays
- for backreferences : (see backreferences)
- in debugger : Using the Debugger
- line boundary
- prototype character : Prototypes
- for scalar variable names : Variables
- word boundary : Nailing Things Down
- $ variables
-
- $^ ($FORMAT_TOP_NAME) : Universal Blunders
- $0 ($PROGRAM_NAME)
- $1, $2, $3... : (see backreferences)
- $& ($MATCH)
- $' ($POSTMATCH)
- $* ($MULTILINE_MATCHING) : Regular Expression Special Variables
- $@ ($EVAL_ERROR)
- $\ ($OUPUT_RECORD_SEPARATOR) : Switches
- $\ ($OUTPUT_RECORD_SEPARATOR)
- $` ($PREMATCH)
- $! ($OS_ERROR)
- $[ : Global Special Variables
- $] ($PERL_VERSION)
- $^ ($FORMAT_TOP_NAME)
- $^A ($ACCUMULATOR)
- $^D ($DEBUGGING)
- $^F ($SYSTEM_FD_MAX)
- $^H : Global Special Variables
- $^I ($INPLACE_EDIT)
- $^L ($FORMAT_FORMFEED) : Global Special Variables
- $^L ($FORMAT_LINEFEED)
- $^O ($OSNAME)
- $^P ($PERLDB)
- $^ ($BASETIME) : Global Special Variables
- $^T ($BASETIME)
- $^W ($WARNING)
- $^X ($EXECUTABLE_NAME)
- $: ($FORMAT_LINE_BREAK _CHARACTERS)
- $, ($LIST_SEPARATOR) : Global Special Variables
- $, ($OUTPUT_FIELD_SEPARATOR)
- $$ ($PROCESS_ID)
- $. ($INPUT_LINE_NUMBER)
-
- Global Special Variables
- English - Use English or awk Names for Punctuation Variables
- resetting with close function : close
- $= ($FORMAT_LINES_PER_PAGE)
- $- ($FORMAT_LINES_LEFT)
- $< ($REAL_USER_ID)
- $( ($REAL_GROUP_ID)
- $) ($EFFECTIVE_GROUP_ID)
- $% ($FORMAT_PAGE_NUMBER)
- $+ ($LAST_PAREN_MATCH)
- $? ($CHILD_ERROR)
-
- Global Special Variables
- English - Use English or awk Names for Punctuation Variables
- backtick operator and : Command input (backtick) operator
- close function and : close
- $" ($LIST_SEPARATOR) : English - Use English or awk Names for Punctuation Variables
- $> ($EFFECTIVE_USER_ID)
- $; ($SUBSCRIPT_SEPARATOR)
- $# ($OFMT) : Global Special Variables
- $/ ($INPUT_RECORD_SEPARATOR)
- $~ ($FORMAT_NAME)
- $_ ($ARG)
-
- Global Special Variables
- English - Use English or awk Names for Punctuation Variables
- angle operator and : Line input (angle) operator
- forearch statement and : Foreach loops
- glob function with : Filename globbing operator
- grep function and : grep
- map function and : map
- $_ ($ARG) : The fine print
- $| ($OUTPUT_AUTOFLUSH)
- (dot) : Named Unary and File Test Operators
-
- .. (range) operator : Range Operator
- .= (assignment) operator : Assignment Operators
- character wildcard
- concatenation operator
- debugger command : Debugger Commands
- " (double quotes)
-
- String literals
- The regular expression bestiary
- in formline arguments : formline
- = (equal sign)
-
- == (equal to) operator
- => (corresponds to) operator : Comma Operators
-
- with key/value pairs : Hashes (Associative Arrays)
- with named parameters : Hashes (Associative Arrays)
- =~ (binding) operator : Binding Operators
- assignment operator
- copy constructor : Copy constructor
- debugger command : Debugger Commands
- - (hyphen)
-
- The rules of regular expression matching
- Named Unary and File Test Operators
- -*- for Emacs : Command Processing
- -= (assignment) operator : Assignment Operators
- -- (autodecrement) operator
- -- swtich, Perl : Switches
- -> (arrow) operator
- -| piping pseudo-command : Talking to yourself
- arithmetic negation operator : Ideographic Unary Operators
- debugger command : Debugger Commands
- subtractive operator : Additive Operators
- < (left angle bracket)
-
- <= (less than or equal) operator : Relational Operators
- <=> (comparison) operator
- << (left-shift) operator : Shift Operators
- << for here documents : "Here" documents
- <<= (assignment) operator : Assignment Operators
- <> construct : (see angle operator)
- <> option specifier : Non-option callback routine
- <FH> operator : Frequently Ignored Advice
- debugger command : Debugger Commands
- for filename globbing operator : Filename globbing operator
- in filenames : open
- for left justification : Format Variables
- less than operator : Relational Operators
- for line input operator : Line input (angle) operator
- () (parentheses)
-
- The regular expression bestiary
- Operators
- Terms and List Operators (Leftward)
- Developing with Style
- (?!) assertion : Regular expression extensions
- (?!...) assertion : The rules of regular expression matching
- (?:) for grouping : Regular expression extensions
- (?...) assertion : The rules of regular expression matching
- (?=) assertion : Regular expression extensions
- (?i) modifier : Regular expression extensions
- (?#) for comments : Regular expression extensions
- for backreferences : Backreferences
- in functions : Functions
- grouping operator : The rules of regular expression matching
- for list values : List Values and Arrays
- % (percent sign) : Named Unary and File Test Operators
-
- %= (assignment) operator : Assignment Operators
- for checksums : unpack
- for hash names : Variables
- modulus operator : Multiplicative Operators
- prototype character : Prototypes
- + (plus) : Named Unary and File Test Operators
-
- += (assignment) operator : Assignment Operators
- ++ (autoincrement) operator
- additive operator : Additive Operators
- in filenames : open
- quantifier
- unary operator : Ideographic Unary Operators
- ? (question mark) : Named Unary and File Test Operators
-
- ?: (conditional) operator : Conditional Operator
- ?? operator : (see m?? (match) operator)
- debugger command : Debugger Commands
- quantifier
- ' (single quotes) : String literals
- " (double quotes)
- > (right angle bracket)
-
- >= (greater than or equal) operator : Relational Operators
- >> (right-shift) operator : Shift Operators
- >>= (assignment) operator : Assignment Operators
- debugger command : Debugger Commands
- for filename globbing operator : Filename globbing operator
- in filenames : open
- greater than operator : Relational Operators
- for line input operator : Line input (angle) operator
- for right justification : Format Variables
- (semicolon)
- # (sharp)
-
- #! (shebang) notation
- for comments : Pattern Matching
- in formats : Formats
- ' (single quotes) : String literals
- / (slash) : Named Unary and File Test Operators
-
- /= (assignment) operator : Assignment Operators
- // operator : (see match (m//) operator)
- debugger command : Debugger Commands
- division operator : Multiplicative Operators
- in import list : Specialized import lists
- root directory : chroot
- ~ (tilde)
-
- bitwise negation operator : Ideographic Unary Operators
- complement operator : Awk Traps
- to supress blank lines : Formats
- _ (underscore)
-
- Variables
- Previous Perl Traps
- global filehandle : Global Special Filehandles
- large numbers and : Numeric literals
- in variable names : Developing with Style
- | (vertical bar)
-
- |= (assignment) operator : Assignment Operators
- |- piping pseudo-command : Talking to yourself
- || (debugger command) : Debugger Commands
- || (OR) operator : C-style Logical (Short Circuit) Operators
- ||= (assignment) operator : Assignment Operators
- for alternation : The regular expression bestiary
- bitwise OR operator : Bitwise Operators
- for centering : Format Variables
- debugger command : Debugger Commands
- in filenames : open
- for option speficiers : Aliases and abbreviations
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