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Learning Perl /
Shows how to write, debug, and run a Perl program, describes CGI scripting and data manipulation, and describes scalar values, basic operators, and associative arrays.
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Otros Autores: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Sebastopol, CA :
O'Reilly,
©2001.
|
| Edición: | 3rd ed. |
| Temas: | |
| Acceso en línea: | Texto completo (Requiere registro previo con correo institucional) |
Tabla de Contenidos:
- How Do I Make a Perl Program?
- A Whirlwind Tour of Perl
- Scalar Data
- Numbers
- Strings
- Perl's Built-in Warnings
- Scalar Variables
- Output with print
- The if Control Structure
- Getting User Input
- The chomp Operator
- The while Control Structure
- The undef Value
- The defined Function
- Lists and Arrays
- Accessing Elements of an Array
- Special Array Indices
- List Literals
- List Assignment
- Interpolating Arrays into Strings
- The foreach Control Structure
- Perl's Favorite Default: $_
- Scalar and List Context
- [left angle bracket]STDIN[right angle bracket] in List Context
- Subroutines
- System and User Functions
- Defining a Subroutine
- Invoking a Subroutine
- Return Values
- Arguments
- Private Variables in Subroutines
- The local Operator
- Variable-length Parameter Lists
- Notes on Lexical (my) Variables
- The use strict Pragma
- The return Operator
- Hashes
- What Is a Hash?
- Hash Element Access
- Hash Functions
- Typical Use of a Hash
- I/O Basics
- Input from Standard Input
- Input from the Diamond Operator
- The Invocation Arguments
- Output to Standard Output
- Formatted Output with printf
- Concepts of Regular Expressions
- What Are Regular Expressions?
- Using Simple Patterns
- A Pattern Test Program
- More About Regular Expressions
- Character Classes
- General Quantifiers
- Anchors
- Memory Parentheses
- Precedence
- Using Regular Expressions
- Matches with m//
- Option Modifiers
- The Binding Operator, =~
- Interpolating into Patterns
- The Match Variables
- Substitutions with s///
- The split Operator
- The join Function
- More Control Structures
- The unless Control Structure
- The until Control Structure
- Expression Modifiers
- The Naked Block Control Structure
- The elsif Clause
- Autoincrement and Autodecrement
- The for Control Structure
- Loop Controls
- Logical Operators
- Filehandles and File Tests
- What Is a Filehandle?
- Opening a Filehandle
- Fatal Errors with die
- Using Filehandles
- Reopening a Standard Filehandle
- File Tests
- Directory Operations
- Moving Around the Directory Tree
- Globbing
- An Alternate Syntax for Globbing
- Directory Handles
- Recursive Directory Listing
- Manipulating Files and Directories
- Removing Files
- Renaming Files
- Links and Files
- Making and Removing Directories
- Modifying Permissions
- Changing Ownership
- Changing Timestamps
- Using Simple Modules
- Process Management
- The system Function
- The exec Function
- The Environment Variables
- Using Backquotes to Capture Output
- Processes as Filehandles
- Getting Down and Dirty with Fork
- Sending and Receiving Signals
- Strings and Sorting
- Finding a Substring with index
- Manipulating a Substring with substr
- Formatting Data with sprintf
- Advanced Sorting
- Simple Databases
- DBM Files and DBM Hashes
- Manipulating Data with pack and unpack
- Fixed-length Random-access Databases
- Variable-length (Text) Databases
- Some Advanced Perl Techniques
- Trapping Errors with eval
- Picking Items from a List with grep
- Transforming Items from a List with map
- Unquoted Hash Keys
- More Powerful Regular Expressions
- Slices
- Beyond the Llama.