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Learning Perl, 3rd. Ed.Search this book

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Index: U

uid (user-ID): 11.6.1. The stat and lstat Functions
undef operator: 2.12. The defined Function
slices and: 17.6. Slices
undef value: 2.11. The undef Value
underscore (_)
in integer literals: 2.2.3. Integer Literals
in variable names: 4.10. The use strict Pragma
underscore filehandle: 11.6.5. Using the Special Underscore Filehandle
Unicode: B.30. Locales and Unicode
Universal Time: 11.6.2. The localtime Function
Unix
input/output and: 11.1. What Is a Filehandle?
model of files/directories and: 13.3. Links and Files
portability and: 1.1.2. Why Are There So Many Footnotes?
utilities for
diamond operator and: 6.2. Input from the Diamond Operator
regular expressions and: 7. Concepts of Regular Expressions
Unix password databases: B.7.1. Direct System Database Access
Unix signals, sending/receiving: 14.7. Sending and Receiving Signals
unless control structure: 10.1. The unless Control Structure
unless modifier: 10.3. Expression Modifiers
10.3. Expression Modifiers
unlink operator: 13.1. Removing Files
unpack function: 16.2. Manipulating Data with pack and unpack
unquoted hash keys: 17.4. Unquoted Hash Keys
unshift operator: 3.4.2. The shift and unshift Operators
until control structure: 10.2. The until Control Structure
until modifier: 10.3. Expression Modifiers
10.3. Expression Modifiers
unwinding hashes: 5.2.1. The Hash as a Whole
uppercase
case shifting and: 9.6.5. Case Shifting
vs. lowercase in variable names: 2.5.1. Choosing Good Variable Names
URLs
code in this book: 0.3. Code Examples
CPAN: 1.3.1. What Is CPAN?
B.4.3. Finding and Installing Modules
Perl Monastery: 1.3.3. Are There Any Other Kinds of Support?
search interfaces for Perl: 1.3.1. What Is CPAN?
use directives: B.4.3. Finding and Installing Modules
pragmas and: B.6. Pragmas
use strict pragma: 4.10. The use strict Pragma
B.6.4. The strict Pragma
user functions (see subroutines)
user-ID, numeric ($uid): 11.6.1. The stat and lstat Functions
changing file ownership and: 13.6. Changing Ownership
user-ID (uid): 11.6.1. The stat and lstat Functions
utilities
inside: B.4.3. Finding and Installing Modules
perlbug: 1.3.4. What If I Find a Bug in Perl?
Unix (see Unix, utilities for)
which_dbm: 16.1. DBM Files and DBM Hashes
utime function: 13.7. Changing Timestamps


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