HTML CSS PHP PERL

Index

 

Book Home

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 | Z

Index: Symbols and Numbers

\1 and $1 variables
7.3.2.3. Parentheses as memory
7.4.5. Special Read-Only Variables
8.3 filename format : 10.3. Using Pathnames and Filenames
&& operator as control structure : 9.6. &&, ||, and ?: as Control Structures
**= operator : 2.6.1. Binary Assignment Operators
* (asterisk)
** (exponentiation) operator : 2.4.1. Operators for Numbers
as prefix : D.7. Symbol Table Manipulation With *FRED
in pack format string : 16.2. Packing and Unpacking Binary Data
in regular expressions : 7.3.2.2. Multipliers
@ (at sign)
@_ array
1.6.9. Making It a Bit More Modular
8.4. Arguments
as array name prefix : 1.6.5. More than One Secret Word
as format field delimiter : 11.4.1. Text Fields
as prefix for array variables : 3.3. Variables
at sign
@*, in formats : 11.4.3. Multiline Fields
` (backquotes) as command invocation : 14.2. Using Backquotes
\ (backslash) : 10.3. Using Pathnames and Filenames
escape character : 2.3.1. Single-Quoted Strings
escapes : 2.3.2. Double-Quoted Strings
in regular expressions : 7.3.1. Single-Character Patterns
! (bang)
!= operator : 2.4.2. Operators for Strings
logical not operator : 1.6.9. Making It a Bit More Modular
[ (left bracket) in double-quoted strings : 3.7. Variable Interpolation of Arrays
^ (caret)
as anchor in regular expressions : 7.3.3. Anchoring Patterns
as filled-field in formats : 11.4.4. Filled Fields
: (colon)
label suffix : 9.4. Labeled Blocks
matching with split() : 7.6.1. The split Function
, (comma)
array literal character : 3.2. Literal Representation
operator : D.4. Other Operators
{} (curly braces)
in double-quoted strings : 2.6.4. Interpolation of Scalars into Strings
in regular expressions : 7.3.2.2. Multipliers
required in if statements : 4.2. The if/unless Statement
$ (dollar sign)
$1 as regular expression memory access : 7.4.5. Special Read-Only Variables
$& (match string) : 7.4.5. Special Read-Only Variables
$` (before-match string) : 7.4.5. Special Read-Only Variables
$^ variable : 11.6.3. Changing the Top-of-Page Format Name
$^I variable : 17.5. Variable-Length ( Text) Databases
$^T variable : 10.6. The -x File Tests
$: variable : 11.4.4. Filled Fields
$= variable : 11.6.5. Changing the Position on the Page
$- variable : 11.6.5. Changing the Position on the Page
$% (special variable), example of : 1.6.14. Listing the Secret Words
$#fred (index of last element of @fred) : 3.4.2. Array Element Access
$' (after-match string) : 7.4.5. Special Read-Only Variables
$/ variable : 6.1. Input from STDIN
$~ variable : 11.6.2. Changing the Format Name
$_ variable
default for file tests : 10.6. The -x File Tests
default for stat(), lstat() : 10.7. The stat Function
foreach statement and : 4.6. The foreach Statement
implicit assignment to when reading : 6.1. Input from STDIN
regular expression matching default : 7.2. Simple Uses of Regular Expressions
selecting other than with =~ operator : 7.4.1. Selecting a Different Target (the =~ Operator)
split() default : 7.6.1. The split Function
tr() default target : 15.5. Transliteration
unlink() default : 13.1. Removing a File
$a variable, as special in sort comparison routine : 15.4. Advanced Sorting
$b variable, as special in sort comparison routine : 15.4. Advanced Sorting
$_[0], distinct from $_ : 8.4. Arguments
removing significance in strings : 2.6.4. Interpolation of Scalars into Strings
scalar variable prefix : 2.5. Scalar Variables
. (dot)
.. list construction operator : 3.2. Literal Representation
.= operator : 2.6.1. Binary Assignment Operators
in regular expressions : 7.3.1. Single-Character Patterns
= (equal sign)
== operator : 2.4.2. Operators for Strings
=> operator (CGI) : 18.4.5. Fancier Calling Sequences
=~ operator : 7.4.1. Selecting a Different Target (the =~ Operator)
substitution and : 7.5. Substitutions
array assignment operator : 3.4.1. Assignment
assignment operator : 2.6. Scalar Operators and Functions
=~ operator
example of : 1.6.8. Making It Fair for the Rest
tr() and : 15.5. Transliteration
> (greater than)
>= (greater than or equal to) operator : 2.4.2. Operators for Strings
greater than operator : 2.4.2. Operators for Strings
- (hyphen)
-= operator : 11.4.2. Numeric Fields
-- operator : 2.6.2. Autoincrement and Autodecrement
in regular expression ranges : 7.3.1. Single-Character Patterns
< (less than)
<=> : (see spaceship (<=>) operator)
<> : (see diamond operator)
<= (less than or equal to) operator : 2.4.2. Operators for Strings
format field character : 11.4.1. Text Fields
less than operator : 2.4.2. Operators for Strings
() (parentheses)
array literals and : 3.2. Literal Representation
as memory in regular expressions : 7.3.4. Precedence
chdir() and : 12.1. Moving Around the Directory Tree
forcing array context with : 3.4.1. Assignment
keys() and : 5.4.1. The keys Function
memory in regular expressions : 7.3.2.3. Parentheses as memory
print() and : 6.3.1. Using print for Normal Output
in regular expressions : 7.3.4. Precedence
values() and : 5.4.2. The values Function
% (percent sign)
associative array prefix
1.6.6. Giving Each Person a Different Secret Word
5.2. Hash Variables
modulus operator : 2.4.1. Operators for Numbers
+ (plus sign)
+= operator
A.3. Chapter 4, Control Structures
2.6.1. Binary Assignment Operators
++ operator
2.6.2. Autoincrement and Autodecrement
14.1. Using system and exec
open() and : 17.4. Fixed-Length Random-Access Databases
in regular expressions : 7.3.2.2. Multipliers
# (pound sign)
comment character : 1.5. Basic Concepts
format field characters : 11.4.2. Numeric Fields
? (question mark) in regular expressions : 7.3.2.2. Multipliers
?: operator, as control structure : 9.6. &&, ||, and ?: as Control Structures
#!/usr/bin/perl line : 1.5. Basic Concepts
/ (slash)
changing regular expressions : 7.4.3. Using a Different Delimiter
choosing alternate to, in substitution : 7.5. Substitutions
regular expression delimiter : 7.2. Simple Uses of Regular Expressions
~ (tilde) in formats : 11.4.4. Filled Fields
| (vertical bar), open() and
1.6.12. Warning Someone When Things Go Astray
14.3. Using Processes as Filehandles
| (vertical bar)
format field characters : 11.4.1. Text Fields
in regular expressions : 7.3.2.4. Alternation
|| (logical-or) operator
as control structure : 9.6. &&, ||, and ?: as Control Structures
die() and : 10.4. A Slight Diversion: die
example of
A.7. Chapter 8, Functions
15.4. Advanced Sorting
introduced : 1.6.9. Making It a Bit More Modular


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 | Z

© 2000- NIV