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 |
---|

& (ampersand)

and HTML 178

and subroutines 119, 121

default data 58

inputting data 57

&& (double ampersand), logical and

operator 105

* (asterisk)

multiplication operator 75

quantifier in search patterns 154

** (double asterisk), exponential powers 77

@ (at sign)

@_ (underscore array), and

subroutines 120

and hashes 129

array variables 25

arrays 8399

escaping in e-mail addresses 209

[ ] (brackets)

and character classes 146, 147

for individual elements of array 84

^ (caret)

limiting location of search patterns 149

negating character classes 147

{ } (curly brackets)

and hashes 128, 129

closing 115

in search patterns 155

/ (division) 75

See also forward slashes

$ (dollar sign)

$&, and found data 140

$n, in search patterns 158

$`, and found data 140

$´, and found data 140

as Unix prompt 242

for individual elements

of arrays 84

of hashes 128

limiting location of search patterns 149

scalar variables 25

= (equals sign)

combined with other operators 81

inputting arrays 70

inputting hashes 71

inputting scalar data 69

storing result of operation 74

== (double equals signs), equal to

comparison operator 102

=~ (binding operator) 139

and finding 138

!= (not equal to), comparison operator 102

> (greater than)

and writing to files 190

as Unix prompt 242

comparison operator 102

>= (greater than or equal to), comparison

operator 102

>> (double greater than), and appending

files 190

< (less than)

and reading files 190

comparison operator 102

<= (less than or equal to), comparison

operator 102

- (minus/hyphen)

and search patterns 146

subtraction operator 75

-- (double minus), decrement operator 82

and for block 113

% (percent sign)

as Unix prompt 242

hash variables 25

modulus operator 78

. (period)

concatenation 79

wildcard in search patterns 144

+ (plus)

addition operator 75

quantifier in search patterns 153

++ (double plus), increment operator 82

and for block 113

and while conditionals 110

# (pound symbol)

and debugging 215

and matching 138

for comments 35

? (question mark)

and non-greedy quantifiers 156

default data 58

inputting data 57

quantifier in search patterns 152

~ (tilde), on Unix servers 243

See also =~

| (vertical bar)

alternation, in search patterns 157

piping, and e-mailing output 207

|| (double vertical bar)

and verifying file/directory operations

192

logical or operator 105

1;, and subroutines 124

©Copyright 2000 by Elizabeth Castro. All rights reserved.

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This index is from my book, Perl and CGI for the World Wide Web: Visual QuickStart Guide, published by Peachpit Press.