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Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Index: Symbols & Numbers

$1, $2, ... (backreferences): 6.0.3. Special Variables (Perl Cookbook)

finding duplicate words: 6.16.1. Problem (Perl Cookbook)

-- autodecrement operator: 10.6. Autoincrement and Autodecrement (Learning Perl)

` ` backquotes/backticks: 1.5. A Whirlwind Tour of Perl (Learning Perl)

14.4. Using Backquotes to Capture Output (Learning Perl)

{ } (braces)

(see also curly braces)
hash key, enclosing in: 1.2.1.2.2. Hashes. (Programming Perl)

- hyphen: 6.2. Input from the Diamond Operator (Learning Perl)

8.1. Character Classes (Learning Perl)
in PYX notation: 4.5. XML::PYX (Perl & XML)

( ) parentheses (see also parentheses)

in PYX notation: 4.5. XML::PYX (Perl & XML)

' ' single quotes: 2.3.1. Single-Quoted String Literals (Learning Perl)

[ ] (square brackets): 2.5. Entities (Perl & XML)

< access mode: 7.0.3. I/O Operations (Perl Cookbook)

> access mode: 7.0.3. I/O Operations (Perl Cookbook)

<! (delimiters): 3.7.1. DTDs (Perl & XML)

< > (angle brackets): 2.2. Markup, Elements, and Structure (Perl & XML)

2.9. Free-Form XML and Well-Formed Documents (Perl & XML)
parsers and: 3.1. XML Parsers (Perl & XML)
well-formed documents, checking: 3.1.1. Example (of What Not to Do): A Well-Formedness Checker (Perl & XML)

< for left justification: 7.1. Format Variables (Programming Perl)

< > (diamond) operator: 7.0.3. I/O Operations (Perl Cookbook)

7.7.2. Solution (Perl Cookbook)
8.0. Introduction (Perl Cookbook)
17.0. Introduction (Perl Cookbook)

<&= and <& open modes: 7.19.2. Solution (Perl Cookbook)

-> (infix) notation: 11.0.1. References (Perl Cookbook)

- subtraction operator: 2.2.5. Numeric Operators (Learning Perl)

& (ampersand): 3.10. Named Unary and File Test Operators (Programming Perl)

4.3. Invoking a Subroutine (Learning Perl)

4.11.1. Omitting the Ampersand (Learning Perl)

2.5. Entities (Perl & XML)

3.8. XML::Writer (Perl & XML)

parsers and: 3.1. XML Parsers (Perl & XML)

well-formed documents, checking: 3.1.1. Example (of What Not to Do): A Well-Formedness Checker (Perl & XML)

address-of operator (in C): 3.21. C Operators Missing from Perl (Programming Perl)

&& operator used with tags: 9.9. Tags (Mastering Perl/Tk)

& (bitwise and) operator: 3.13. Bitwise Operators (Programming Perl)

&& (AND) operator: 3.14. C-Style Logical (Short-Circuit) Operators (Programming Perl)

AND bitwise operator: 4.5.10. Bitwise Operators (Perl in a Nutshell)

attachments and: 2.4.2.2. Widget-to-widget attachments (Mastering Perl/Tk)

calling subroutines: 4.7.1. Calling Subroutines (Perl in a Nutshell)

in encoded URLs: 9.2. URL Encoding (Perl in a Nutshell)

in filenames: 29.2.104. open (Programming Perl)

Perl version 5, changes in use: 1.2.2. Verbs (Programming Perl)

prototype character: 6.4. Prototypes (Programming Perl)

prototype symbol: 4.7.5. Prototypes (Perl in a Nutshell)

for subroutine names: 1.2.1. Variable Syntax (Programming Perl)

2.5. Names (Programming Perl)
2.5. Names (Programming Perl)
4.6. goto (Programming Perl)
6.1. Syntax (Programming Perl)
omitting in prototypes: 6.4. Prototypes (Programming Perl)

&&= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

3.17. Assignment Operators (Programming Perl)

&= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

< > (angle brackets)

<=> (comparison) operator: 4.5.4.2. Equality operators (Perl in a Nutshell)
<...> (line-input) operator: 4.9. Filehandles (Perl in a Nutshell)
<<= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)
<< debugger commands, and: 6.2. Debugger Commands (Perl in a Nutshell)
< (less-than) operator: 4.5.4.1. Relational operators (Perl in a Nutshell)
<= (less-than-or-equal) operator: 4.5.4.1. Relational operators (Perl in a Nutshell)
>>= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)
> (greater-than) operator: 4.5.4.1. Relational operators (Perl in a Nutshell)
>= (greater-than-or-equal) operator: 4.5.4.1. Relational operators (Perl in a Nutshell)
>> (to open file for appending): 4.9. Filehandles (Perl in a Nutshell)

.= append operator: 2.5.3. Binary Assignment Operators (Learning Perl)

@+ array of ending positions: 28.2. Special Variables in Alphabetical Order (Programming Perl)

@_ array variable: 4.5. Arguments (Learning Perl)

= assignment operator: 2.5.2. Scalar Assignment (Learning Perl)

* (asterisk): 3.10. Named Unary and File Test Operators (Programming Perl)

as wildcard character: 16. User Customization (Mastering Perl/Tk)

** (exponentiation)operator: 3.4. Exponentiation (Programming Perl)

**= (exponentiation assignment) operator: 3.17. Assignment Operators (Programming Perl)

*= (multiplication assignment) operator: 3.17. Assignment Operators (Programming Perl)

*? quantifier: 5.3.1. Metasymbol Tables (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

multiplication operator: 4.5.3. Arithmetic Operators (Perl in a Nutshell)

multiplicative operator: 3.7. Multiplicative Operators (Programming Perl)

pathname separators: 16.2. Using the Option Database (Mastering Perl/Tk)

prototype character: 6.4. Prototypes (Programming Perl)

prototype symbol (typeglob): 4.7.5. Prototypes (Perl in a Nutshell)

quantifier: 1.7.1. Quantifiers (Programming Perl)

5.3.1. Metasymbol Tables (Programming Perl)

in quantifiers: 5.5. Quantifiers (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

typeglob: 1.2.1. Variable Syntax (Programming Perl)

for typeglob names: 2.5. Names (Programming Perl)

2.10. Typeglobs and Filehandles (Programming Perl)

** (exponentiation) operator: 4.5.3. Arithmetic Operators (Perl in a Nutshell)

*= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

@ (at sign)

@_ array: 4.7.2. Passing Arguments (Perl in a Nutshell)

4.7.2. Passing Arguments (Perl in a Nutshell)
6.2. Semantics (Programming Perl)
28.2. Special Variables in Alphabetical Order (Programming Perl)
6.2. Semantics (Programming Perl)

for array names: 1.2.1. Variable Syntax (Programming Perl)

2.4. Variables (Programming Perl)

@- array: 5.7.1. Capturing (Programming Perl)

@+ array of ending positions: 5.7.1. Capturing (Programming Perl)

changes in use, Perl versions: 24.1.5. Previous Perl Traps (Programming Perl)

in debugger: 20.1. Using the Debugger (Programming Perl)

dereferencing with: 4.8.2. Dereferencing (Perl in a Nutshell)

format fieldholders: 4.12. Formats (Perl in a Nutshell)

inside strings, escaping with backslash: 2.6.2. String Literals (Programming Perl)

in picture lines: 7. Formats (Programming Perl)

prototype character: 6.4. Prototypes (Programming Perl)

prototype symbol (list): 4.7.5. Prototypes (Perl in a Nutshell)

signifying arrays: 4.2.5.1. Arrays (Perl in a Nutshell)

++ autoincrement operator: 10.6. Autoincrement and Autodecrement (Learning Perl)

! (bang)

! (logical negation) operator

overloading: 13.3. Overloadable Operators (Programming Perl)

!= (not equal to) operator: 4.5.4.2. Equality operators (Perl in a Nutshell)

1.5.6. Some Numeric and String Comparison Operators (Programming Perl)
24.1.1. Universal Blunders (Programming Perl)

!! debugger command: 20.2.6. Actions and Command Execution (Programming Perl)

!~ (binding) operator: 3.6. Binding Operators (Programming Perl)

using with pattern matching operators: 5.2. Pattern-Matching Operators (Programming Perl)

complemented character sets, using for: 5.4.3.4. Defining your own character properties (Programming Perl)

CPAN.pm eval command: 2.4.4. Installing Modules with the CPAN Module (Perl in a Nutshell)

in debugger commands: 20.2.6. Actions and Command Execution (Programming Perl)

logical negation operator: 4.5.2. Unary Operators (Perl in a Nutshell)

3.5. Ideographic Unary Operators (Programming Perl)

Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

!! Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

=~ binding operator: 9.3. The Binding Operator, =~ (Learning Perl)

32-bit systems: 25.2. Endianness and Number Width (Programming Perl)

{ } (braces): 8.5. Braces, Brackets, and Quoting (Programming Perl)

24.3. Programming with Style (Programming Perl)

bare blocks, creating with: 4.5. Bare Blocks (Programming Perl)

{ metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

delimiting statement blocks: 4.3. Statements (Perl in a Nutshell)

precedence of: 3.1. Terms and List Operators (Leftward) (Programming Perl)

quantifier: 1.7.1. Quantifiers (Programming Perl)

5.3.1. Metasymbol Tables (Programming Perl)

regular expression quantifiers: 4.6.6. Quantifiers (Perl in a Nutshell)

search patterns, clarifying with use: 2.6.5. Interpolating Array Values (Programming Perl)

for statement blocks: 1.6.1.1. The if and unless statements (Programming Perl)

{{ Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

{ Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

[ ] (brackets)

[ metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

[...] character class: 5.3.1. Metasymbol Tables (Programming Perl)

character classes: 5.3.1. Metasymbol Tables (Programming Perl)

5.4.1. Custom Character Classes (Programming Perl)

insert method and: 8.6. Inserting Text (Mastering Perl/Tk)

to match characters: 5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)

Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

precedence of: 3.1. Terms and List Operators (Leftward) (Programming Perl)

regular expression metacharacter: 4.6.4. Character Classes (Perl in a Nutshell)

in Tcl: 20.2.2. Tcl/Tk Slave Processor Code (Mastering Perl/Tk)

Tk::Pretty and: 13.1.1. The configure Method (Mastering Perl/Tk)

^ (caret)

in [...] construct: 4.6.4. Character Classes (Perl in a Nutshell)

assertion: 1.7.1. Quantifiers (Programming Perl)

bitwise xor operator: 3.13. Bitwise Operators (Programming Perl)

grid method and: 2.2.1. Special Characters (Mastering Perl/Tk)

2.2.2. grid Options (Mastering Perl/Tk)

grid geometry manager placeholder: 21.2.2. The grid Geometry Manager (Perl in a Nutshell)

inverting character class

character class, inverting: 5.4.1. Custom Character Classes (Programming Perl)

line boundary: 1.7.3. Nailing Things Down (Programming Perl)

marks as: 8.16. Marks (Mastering Perl/Tk)

matching: 5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

operator used with tags: 9.9. Tags (Mastering Perl/Tk)

in picture lines: 7. Formats (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

XOR bitwise operator: 4.5.10. Bitwise Operators (Perl in a Nutshell)

^= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

3.17. Assignment Operators (Programming Perl)

^ caret anchor: 8.3. Anchors (Learning Perl)

: (colon)

in package names: 7.1. Namespaces and Packages (Perl in a Nutshell)

-0 command-line switch: 19.1. Command Processing (Programming Perl)

-0 command-line option: 8.0. Introduction (Perl Cookbook)

/ division operator: 2.2.5. Numeric Operators (Learning Perl)

$ (dollar sign): 1.2.1.2.2. Hashes. (Programming Perl)

$| as special variable: 1.6. Debugging and PrototypingPerl/Tk Programs (Mastering Perl/Tk)

in debugger: 20.1. Using the Debugger (Programming Perl)

dereferencing with: 4.8.2. Dereferencing (Perl in a Nutshell)

$# prefix: 2.8.2. Array Length (Programming Perl)

$$ (current process ID): 2.5. Names (Programming Perl)

$? (exit status, last child process): 2.5. Names (Programming Perl)

$ variables

$^O variable: 25. Portable Perl (Programming Perl)

line boundary: 5.6.2. Endings: The \z, \Z, and $ Assertions (Programming Perl)

in matching: 5.2.2. The m// Operator (Matching) (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

$^O as operating system identifier: 12.3. The Win32 System Menu Item (Mastering Perl/Tk)

prototype symbol (scalar): 4.7.5. Prototypes (Perl in a Nutshell)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

for scalar variable names: 1.2.1.2.1. Arrays. (Programming Perl)

2.4. Variables (Programming Perl)

scalar variable interpolation and: 2.6.2. String Literals (Programming Perl)

signifying scalar variables: 4.2.5. Variables (Perl in a Nutshell)

1.2.1. Variable Syntax (Programming Perl)

in Tcl: 20.2.2. Tcl/Tk Slave Processor Code (Mastering Perl/Tk)

word boundary: 1.7.3. Nailing Things Down (Programming Perl)

$ variables

$' variable: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

$0 ($PROGRAM_NAME): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$a and $b (sort variables): 28.2. Special Variables in Alphabetical Order (Programming Perl)

@': 5.7.1. Capturing (Programming Perl)

@&: 5.7.1. Capturing (Programming Perl)

$' ($POSTMATCH): 24.2.1. Time Efficiency (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$*: 28.2. Special Variables in Alphabetical Order (Programming Perl)

$@ ($EVAL_ERROR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$\ ($OUTPUT_RECORD_SEPARATOR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$` ($PREMATCH): 24.2.1. Time Efficiency (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$! ($OS_ERROR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

${^WARNING_BITS}: 28.2. Special Variables in Alphabetical Order (Programming Perl)

$] ($PERL_VERSION): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^ ($FORMAT_TOP_NAME): 7.1. Format Variables (Programming Perl)

7.2. Footers (Programming Perl)
24.1.1. Universal Blunders (Programming Perl)
28.2. Special Variables in Alphabetical Order (Programming Perl)

$^A ($ACCUMULATOR): 7.2.1. Accessing Formatting Internals (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)
formline function output: 29.2.42. formline (Programming Perl)

$^C ($COMPILING): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^D ($DEBUGGING): 19.1.3. Switches (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$^E ($EXTENDED_OS_ERROR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^F ($SYSTEM_FD_MAX): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^H: 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^I ($INPLACE_EDIT): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^L ($FORMAT_LINEFEED): 7.1. Format Variables (Programming Perl)

$^M: 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^O ($OSNAME): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^P ($PERLDB): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^S ($EXCEPTIONS_BEING_CAUGHT): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^T ($BASETIME): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^V ($PERL_VERSION): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^W ($WARNING): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$^X ($EXECUTABLE_NAME): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$: ($FORMAT_LINE_BREAK_CHARACTERS): 7. Formats (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$, ($LIST_SEPARATOR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$$ ($PROCESS_ID): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$. ($INPUT_LINE_NUMBER): 28.2. Special Variables in Alphabetical Order (Programming Perl)

resetting with close function: 29.2.16. close (Programming Perl)

$= ($FORMAT_LINES_PER_PAGE): 7.1. Format Variables (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

@`: 5.7.1. Capturing (Programming Perl)

$< ($REAL_USER_ID): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$line: 1.6.2.1. The while and until statements (Programming Perl)

$- ($FORMAT_LINES_LEFT): 7. Formats (Programming Perl)

7.2. Footers (Programming Perl)
28.2. Special Variables in Alphabetical Order (Programming Perl)

$) ($EFFECTIVE_GROUP_ID): 28.2. Special Variables in Alphabetical Order (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$( ($REAL_GROUP_ID): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$% ($FORMAT_PAGE_NUMBER): 7.1. Format Variables (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

@+: 5.7.1. Capturing (Programming Perl)

$? ($CHILD_ERROR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

backtick operator and: 2.11.1. Command Input (Backtick) Operator (Programming Perl)
close function and: 29.2.16. close (Programming Perl)

$> ($EFFECTIVE_USER_ID): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$[semi] ($SUBSCRIPT_SEPARATOR): 28.2. Special Variables in Alphabetical Order (Programming Perl)

$#, obsolete variable for numeric output: 28.2. Special Variables in Alphabetical Order (Programming Perl)

$&: 5.2. Pattern-Matching Operators (Programming Perl)

$`: 5.2. Pattern-Matching Operators (Programming Perl)

${^ (internal variable names): 2.5. Names (Programming Perl)

$^W: 4.9.1. Controlling Warnings (Programming Perl)

$; (SUBSCRIPT_SEPARATOR): 2.9. Hashes (Programming Perl)

$': 5.2. Pattern-Matching Operators (Programming Perl)

$/ ($INPUT_RECORD_SEPARATOR): 19.1.3. Switches (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$~ ($FORMAT_NAME): 7.1. Format Variables (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$_ ($ARG) ;glob function with: 2.11.3. Filename Globbing Operator (Programming Perl)

$_ variable: 1.7. Regular Expressions (Programming Perl)

1.7.1. Quantifiers (Programming Perl)

$| ($OUTPUT_AUTOFLUSH): 7.1. Format Variables (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

${^WIDE_SYSTEM_CALLS}: 15.1. Building Character (Programming Perl)

28.2. Special Variables in Alphabetical Order (Programming Perl)

$1, $2, $3, ...: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

4.6.7. Pattern Match Variables (Perl in a Nutshell)

$& variable: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

$< variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$> variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$@ variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$\ variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$` variable: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

$! variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$[ variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$] variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^ variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$^A variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^D variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^E variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^F variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^H variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^I variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^L variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^M variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^N variable: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

$^O variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^P variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$: variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$, variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$$ variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$. variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$= variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$# variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$- variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$( variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$) variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$% variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$+ variable: 4.4.5. Regular Expression Special Variables (Perl in a Nutshell)

$? variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$" variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$; variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$/ variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$~ variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$_ ($ARG) variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

angle operator and: 2.11.2. Line Input (Angle) Operator (Programming Perl)

$0 variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$| variable: 4.4.6. Filehandle Special Variables (Perl in a Nutshell)

$^T variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^W variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

$^X variable: 4.4.1. Global Special Variables (Perl in a Nutshell)

. (dot): 3.10. Named Unary and File Test Operators (Programming Perl)

... (range operator): 3.15. Range Operator (Programming Perl)

character wildcard: 1.7. Regular Expressions (Programming Perl)

5.2.1. Pattern Modifiers (Programming Perl)
5.3.3. Wildcard Metasymbols (Programming Perl)

(concatenation) operator: 1.5.2. String Operators (Programming Perl)

3.8. Additive Operators (Programming Perl)
autogeneration via stringification handler: 13.3. Overloadable Operators (Programming Perl)

in debugger command: 20.1. Using the Debugger (Programming Perl)

20.2.1. Stepping and Running (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

quantifiers, use in: 1.7.1. Quantifiers (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

separating integers in v-strings: 2.6.7. V-String Literals (Programming Perl)

.. (range) operator: 4.5.11.1. Range operator (Perl in a Nutshell)

3.15. Range Operator (Programming Perl)

... (range) operator: 4.5.11.1. Range operator (Perl in a Nutshell)

.= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

3.17. Assignment Operators (Programming Perl)

./ dot and slash: 1.4.1. A Simple Program (Learning Perl)

.. dot-dot: 13.3. Links and Files (Learning Perl)

:: (double colon), using boolean tests in XPath: 8.2. XPath (Perl & XML)

-drawbranch option: 18.4.1. Using Indicators with HList (Mastering Perl/Tk)

= (equal sign)

== (equal to) operator: 4.5.4.2. Equality operators (Perl in a Nutshell)

1.5.3. Assignment Operators (Programming Perl)
1.5.6. Some Numeric and String Comparison Operators (Programming Perl)
3.12. Equality Operators (Programming Perl)

assignment operator: 4.2.5. Variables (Perl in a Nutshell)

4.5.6. Assignment Operators (Perl in a Nutshell)

debugger command: 20.2.7. Miscellaneous Commands (Programming Perl)

for embedded documentation (pod): 4.1. Program Structure (Perl in a Nutshell)

= (assignment) operator: 1.2.1.1. Singularities (Programming Perl)

3.17. Assignment Operators (Programming Perl)

==> current line marker: 20.1. Using the Debugger (Programming Perl)

=> (corresponds to) operator: 1.2.1.2.2. Hashes. (Programming Perl)

2.9. Hashes (Programming Perl)

=~ (pattern binding) operator: 1.7. Regular Expressions (Programming Perl)

3.6. Binding Operators (Programming Perl)
using with pattern matching operators: 5.2. Pattern-Matching Operators (Programming Perl)

in hash name/value pairs: 4.2.5.2. Hashes (Perl in a Nutshell)

for pod commands: 4.13. Pod (Perl in a Nutshell)

=> operator, defining key/value pairs: 4.2.5.2. Hashes (Perl in a Nutshell)

4.5.11.3. Comma operator (Perl in a Nutshell)

** exponentiation operator: 2.2.5. Numeric Operators (Learning Perl)

_ (file stat cache): 9.0. Introduction (Perl Cookbook)

9.0. Introduction (Perl Cookbook)

_ filehandle: 11.6.5. Using the Special Underscore Filehandle (Learning Perl)

/ (forward slash): 2.4.4. Installing Modules with the CPAN Module (Perl in a Nutshell)

(see also slash)
as string delimiters: 1.3.3. Specifying Options (Mastering Perl/Tk)
Unix pathname separator: 16.2. Using the Option Database (Mastering Perl/Tk)

-> little arrow: 5.2.3. The Big Arrow (Learning Perl)

13.8.3. The File::Spec Module (Learning Perl)

# (hash mark)

#!perl: 1.4.2. What's Inside That Program? (Learning Perl)
#! (shebang) line: 3. The Perl Executable (Perl in a Nutshell)
for comments: 4.1. Program Structure (Perl in a Nutshell)
format fieldholder: 4.12. Formats (Perl in a Nutshell)

- (hyphen): 3.10. Named Unary and File Test Operators (Programming Perl)

5.9.4. The Little Engine That /Could(n't)?/ (Programming Perl)

as index modifier: 8.4.2. Index Modifiers (Mastering Perl/Tk)

arithmetic negation operator: 4.5.2. Unary Operators (Perl in a Nutshell)

3.5. Ideographic Unary Operators (Programming Perl)

in character ranges: 5.4.1. Custom Character Classes (Programming Perl)

character set subtraction: 5.4.3.4. Defining your own character properties (Programming Perl)

configuration parameters and: 1.3.3. Specifying Options (Mastering Perl/Tk)

in debugger commands: 20.2.5. Locating Code (Programming Perl)

grid method and: 2.1.1. Options for pack (Mastering Perl/Tk)

2.2.1. Special Characters (Mastering Perl/Tk)

grid geometry manager placeholder: 21.2.2. The grid Geometry Manager (Perl in a Nutshell)

-*- for emacs: 19.1. Command Processing (Programming Perl)

-= (assignment) operator: 3.17. Assignment Operators (Programming Perl)

-- command-line switch: 19.1.3. Switches (Programming Perl)

->(arrow) operator: 8.3.3. Using the Arrow Operator (Programming Perl)

Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

setPalette method and: 13.4.5. Setting Colors (Mastering Perl/Tk)

13.4.5. Setting Colors (Mastering Perl/Tk)

subtractive operator: 3.8. Additive Operators (Programming Perl)

Text widgets and -- option: 8.16. Marks (Mastering Perl/Tk)

in [...] construct: 4.6.4. Character Classes (Perl in a Nutshell)

-> (arrow) operator: 4.5.1. The Arrow Operator (Perl in a Nutshell)

3.2. The Arrow Operator (Programming Perl)
8.3.3. Using the Arrow Operator (Programming Perl)
dereferencing with: 4.8.2.1. Arrow dereferencing (Perl in a Nutshell)
method invocation with: 12.3.1. Method Invocation Using the Arrow Operator (Programming Perl)

-- (autodecrement) operator: 4.5.5. Autoincrement and Autodecrement (Perl in a Nutshell)

1.5.4. Unary Arithmetic Operators (Programming Perl)
3.3. Autoincrement and Autodecrement (Programming Perl)

#! line: 1.4.2. What's Inside That Program? (Learning Perl)

1.5. A Whirlwind Tour of Perl (Learning Perl)

% modulus operator: 2.2.5. Numeric Operators (Learning Perl)

17.2. Picking Items from a List with grep (Learning Perl)

* multiplication operator: 2.2.5. Numeric Operators (Learning Perl)

! negation operator (see negation operator)

( ) (parentheses): 3. Unary and Binary Operators (Programming Perl)

3.1. Terms and List Operators (Leftward) (Programming Perl)

24.1.1. Universal Blunders (Programming Perl)

24.3. Programming with Style (Programming Perl)

around function arguments: 5. Function Reference (Perl in a Nutshell)

for backreferences: 1.7.4. Backreferences (Programming Perl)

5.7.1. Capturing (Programming Perl)
5.7.1. Capturing (Programming Perl)

conditional operator, use with: 3.16. Conditional Operator (Programming Perl)

in functions: 29. Functions (Programming Perl)

grouping operator: 5.1. The Regular Expression Bestiary (Programming Perl)

null lists, representing: 2.8. List Values and Arrays (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

operator precedence and: 4.5. Operators (Perl in a Nutshell)

(...) grouping: 5.3.1. Metasymbol Tables (Programming Perl)

(?:PATTERN) notation, clustering without capturing: 5.7.2. Clustering (Programming Perl)

5.7.2. Clustering (Programming Perl)

as quote characters: 2.8. List Values and Arrays (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

(?...) extended regular expression syntax: 4.6.8. Extended Regular Expressions (Perl in a Nutshell)

% (percent sign): 3.10. Named Unary and File Test Operators (Programming Perl)

%SIG: 4.10. Signals (Perl in a Nutshell)

for checksums: 29.2.189. unpack (Programming Perl)

dereferencing with: 4.8.2. Dereferencing (Perl in a Nutshell)

for hash names: 1.2.1.2.2. Hashes. (Programming Perl)

2.4. Variables (Programming Perl)

modulus operator: 4.5.3. Arithmetic Operators (Perl in a Nutshell)

3.7. Multiplicative Operators (Programming Perl)

%= (modulus assignment) operator: 3.17. Assignment Operators (Programming Perl)

prototype character: 6.4. Prototypes (Programming Perl)

prototype symbol (hash): 4.7.5. Prototypes (Perl in a Nutshell)

signifying variable type: 4.2.5.2. Hashes (Perl in a Nutshell)

1.2.1. Variable Syntax (Programming Perl)

%= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

| pipe: 11.1. What Is a Filehandle? (Learning Perl)

14.5. Processes as Filehandles (Learning Perl)

+ (plus): 3.10. Named Unary and File Test Operators (Programming Perl)

7.2.2. Simple Quantifiers (Learning Perl)

4.5.5. Autoincrement and Autodecrement (Perl in a Nutshell)

additive operator: 3.8. Additive Operators (Programming Perl)

in filenames: 29.2.104. open (Programming Perl)

++ (autoincrement) operator: 1.5.4. Unary Arithmetic Operators (Programming Perl)

3.3. Autoincrement and Autodecrement (Programming Perl)

quantifier: 1.7. Regular Expressions (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

unary operator: 4.5.2. Unary Operators (Perl in a Nutshell)

+= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

$!, portability of: 25.4. System Interaction (Programming Perl)

# pound sign: 1.4.2. What's Inside That Program? (Learning Perl)

? (question mark)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

quantifier: 1.7.1. Quantifiers (Programming Perl)

5.3.1. Metasymbol Tables (Programming Perl)

in quantifiers: 5.5. Quantifiers (Programming Perl)

?: (conditional) operator: 3.16. Conditional Operator (Programming Perl)

4.5.1. Case Structures (Programming Perl)

?? quantifier: 5.3.1. Metasymbol Tables (Programming Perl)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

?: (conditional) operator: 4.5.11.2. Conditional operator (Perl in a Nutshell)

?...? pattern match operator: 4.6.1. Pattern-Matching Operators (Perl in a Nutshell)

?...? Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

**= raise to the power of operator: 2.5.3. Binary Assignment Operators (Learning Perl)

.. range operator: 3.3. List Literals (Learning Perl)

; (semicolon)

3.1. XML Parsers (Perl & XML)
ending Perl statements: 4.1. Program Structure (Perl in a Nutshell)
in filenames, security risks of: 23.1.2. Cleaning Up Your Environment (Programming Perl)
Perl statements, terminating with: 2.2. Molecules (Programming Perl)
in prototype declarations: 4.7.5. Prototypes (Perl in a Nutshell)
simple statements, ending in: 4.1. Simple Statements (Programming Perl)

\038 (octal value) sequence: 4.6.3. Escaped Sequences (Perl in a Nutshell)

/ (slash): 3.10. Named Unary and File Test Operators (Programming Perl)

debugger command: 20.2.5. Locating Code (Programming Perl)

delimiters, replacing as: 2.6.3. Pick Your Own Quotes (Programming Perl)

division operator: 4.5.3. Arithmetic Operators (Perl in a Nutshell)

3.7. Multiplicative Operators (Programming Perl)

encoding in URLs: 9.2. URL Encoding (Perl in a Nutshell)

/ (root directory): 9.0. Introduction (Perl Cookbook)

root directory: 29.2.15. chroot (Programming Perl)

/=; (assignment) operator: 3.17. Assignment Operators (Programming Perl)

// (see m// operator)

/= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

/.../ pattern match operator: 4.6. Regular Expressions (Perl in a Nutshell)

/.../ Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

2.9. Free-Form XML and Well-Formed Documents (Perl & XML)

well-formed documents and: 3.1.1. Example (of What Not to Do): A Well-Formedness Checker (Perl & XML)

XPath expressions: 8.2. XPath (Perl & XML)

* star: 7.2.2. Simple Quantifiers (Learning Perl)

?: ternary operator: 10.9.2. The Ternary Operator, ?: (Learning Perl)

~ (tilde)

bitwise negation operator: 4.5.2. Unary Operators (Perl in a Nutshell)

3.5. Ideographic Unary Operators (Programming Perl)

to suppress blank lines: 7. Formats (Programming Perl)

suppressing output whitespace: 4.12. Formats (Perl in a Nutshell)

~~ to print strings in fields: 4.12. Formats (Perl in a Nutshell)

12.1. Moving Around the Directory Tree (Learning Perl)

_ underscore: 2.2.3. Integer Literals (Learning Perl)

4.10. The use strict Pragma (Learning Perl)

$0 variable: 6.3. The Invocation Arguments (Learning Perl)

11.3. Fatal Errors with die (Learning Perl)

| (vertical bar)

7.2.4. Alternatives (Learning Perl)

for alternation: 5.1. The Regular Expression Bestiary (Programming Perl)

bitwise or operator: 3.13. Bitwise Operators (Programming Perl)

for centering: 7.1. Format Variables (Programming Perl)

debugger command: 20.2.6. Actions and Command Execution (Programming Perl)

...|... alternation: 5.3.1. Metasymbol Tables (Programming Perl)

in filenames: 29.2.104. open (Programming Perl)

format fieldholders: 4.12. Formats (Perl in a Nutshell)

-| piping pseudocommand: 16.3.2. Talking to Yourself (Programming Perl)

metacharacter: 5.1. The Regular Expression Bestiary (Programming Perl)

5.3. Metacharacters and Metasymbols (Programming Perl)

OR bitwise operator: 4.5.10. Bitwise Operators (Perl in a Nutshell)

Perl debugger command: 6.2. Debugger Commands (Perl in a Nutshell)

regular expression metacharacter: 4.6.2. Regular Expression Syntax (Perl in a Nutshell)

|| (logical or) operator: 5.9.1. Letting Perl Do the Work (Programming Perl)

12.3.3. Syntactic Snafus with Indirect Objects (Programming Perl)

|| (OR logical operator): 1.5.5. Logical Operators (Programming Perl)

|- piping pseudocommand: 16.3.2. Talking to Yourself (Programming Perl)

|| debugger command: 20.2.6. Actions and Command Execution (Programming Perl)

|= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

3.17. Assignment Operators (Programming Perl)

|| (logical OR) operator: 4.5.9. Logical Operators (Perl in a Nutshell)

||= (assignment) operator: 4.5.6. Assignment Operators (Perl in a Nutshell)

3.17. Assignment Operators (Programming Perl)

Numbers

0+ (numification) operator: 13.3. Overloadable Operators (Programming Perl)

"0 but not true": 10.10.3. Discussion (Perl Cookbook)

17.2.3. Discussion (Perl Cookbook)
17.2.3. Discussion (Perl Cookbook)

0 but true: 29.2.37. fcntl (Programming Perl)

-w exemption: 29.2.37. fcntl (Programming Perl)

\038 (octal value) sequence: 4.6.3. Escaped Sequences (Perl in a Nutshell)

"500 Server Error", fixing: 19.3.1. Problem (Perl Cookbook)

Symbols | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z