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Subjects

JAVASCRIPTHTMLCSSPYTHONSQLJAVACPPCSHARPPHPTYPESCRIPTCRUBYGOSWIFTKOTLINRUSTRBASHSCALAOBJECTIVE-CDARTPERLLUAMATLABXMLJSONMARKDOWNASSEMBLYLATEXYAMLSOLIDITYBLOCKCHAIN

Topics

Ruby Basics

Introduction to RubyInstalling RubyRuby SyntaxRuby CommentsRuby VariablesRuby Data TypesRuby OperatorsRuby ConstantsRuby OutputRuby InputRuby String Interpolation

Control Structures

Ruby If-Else StatementsRuby Case StatementsRuby Unless StatementRuby While LoopsRuby For LoopsRuby Each IteratorRuby Break and NextRuby Redo and Retry

Ruby Methods

Defining Ruby MethodsRuby Method ArgumentsRuby Default ArgumentsRuby Keyword ArgumentsRuby Variable ArgumentsRuby Return ValuesRuby Method Aliases

Ruby Collections

Ruby ArraysRuby Array MethodsRuby HashesRuby Hash MethodsRuby RangesRuby Sets

Ruby OOP

Ruby ClassesRuby ObjectsRuby InheritanceRuby ModulesRuby MixinsRuby EncapsulationRuby PolymorphismRuby Method OverridingRuby Class VariablesRuby Instance VariablesRuby Getters and SettersRuby attr_* Methods

Ruby Advanced Concepts

Ruby BlocksRuby ProcsRuby LambdasRuby ClosuresRuby MetaprogrammingRuby ReflectionRuby Dynamic Method CreationRuby Singleton ClassesRuby Method MissingRuby Symbols

Ruby Exception Handling

Ruby Begin-Rescue-EndRuby Raise ExceptionsRuby Custom ExceptionsRuby Ensure ClauseRuby Retry Statement

Ruby File I/O

Ruby File Open and CloseRuby File Read OperationsRuby File Write OperationsRuby File ModesRuby Directory Operations

Ruby Modules and Gems

Ruby Module CreationRuby Module InclusionRuby NamespacesRuby Gem BasicsRuby Gem InstallationRuby Bundler

Ruby Testing

Ruby Unit TestingRuby Test::Unit FrameworkRuby RSpec BasicsRuby Mocking and Stubbing

Ruby Concurrency

Ruby ThreadsRuby FibersRuby GIL (Global Interpreter Lock)Ruby Parallel Processing

Ruby and the Web

Ruby CGI ProgrammingRuby ERB TemplatesRuby and HTTPRuby JSON ParsingRuby XML Parsing

Ruby Performance

Ruby ProfilingRuby BenchmarkingRuby Memory ManagementRuby Garbage Collection

Ruby Best Practices

Ruby Code Style GuideRuby Naming ConventionsRuby Design PatternsRuby Refactoring Techniques

Ruby Code Style Guide

A Ruby code style guide is a set of conventions and best practices for writing clean, readable, and maintainable Ruby code. It helps developers create consistent and high-quality code across projects and teams.

Why Use a Code Style Guide?

Following a code style guide offers several benefits:

  • Improves code readability
  • Enhances collaboration among team members
  • Reduces cognitive load when reading code
  • Facilitates easier maintenance and refactoring

Key Ruby Style Guidelines

1. Indentation and Formatting

Use two spaces for indentation. Avoid tabs. Here's an example:


def greet(name)
  puts "Hello, #{name}!"
end

2. Naming Conventions

Follow these Ruby Naming Conventions:

  • Use snake_case for methods and variables
  • Use CamelCase for classes and modules
  • Use SCREAMING_SNAKE_CASE for constants

3. Method Definitions

Use parentheses for method definitions with parameters. Omit them for parameter-less methods:


def greet(name)
  # With parameters
end

def say_hello
  # Without parameters
end

4. String Literals

Prefer single quotes for strings without interpolation. Use double quotes when interpolation is needed:


name = 'John'
greeting = "Hello, #{name}!"

5. Conditional Statements

Use the modifier form for simple conditionals. For complex ones, use the standard if-else structure:


# Simple conditional
puts "It's cold!" if temperature < 0

# Complex conditional
if temperature < 0
  puts "It's freezing!"
elsif temperature < 20
  puts "It's cool."
else
  puts "It's warm."
end

Best Practices

  • Keep methods short and focused on a single responsibility
  • Use meaningful variable and method names
  • Write self-documenting code, but add comments when necessary
  • Avoid deep nesting of blocks
  • Use Ruby attr_* Methods for simple getters and setters

Tools for Enforcing Style

Consider using tools like RuboCop to automatically check and enforce Ruby style guidelines in your projects.

Conclusion

Adhering to a Ruby code style guide promotes consistency and readability in your codebase. It's essential for writing maintainable Ruby code and collaborating effectively with other developers.

Remember, while following a style guide is important, the ultimate goal is to write clear, efficient, and bug-free code. Always prioritize code functionality and readability over strict adherence to style rules.