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Sandip Subedi

Ruby on Rails Docs
Blog
On GitHub

Main
- Ruby on Rails
ActiveRecord
- Callbacks
- Distinct
- Eager Loading
- Group
- Includes vs Joins
- Joins
- Lazy Loading
- Migration
- Naming Convention
- Storing JSON on postgres
- Table Lock during migration
- Transaction
Bundler
- Exec
DataStructures
- Arrays Method
- Arrays
- Collection Classes
- Enumerable Module custom created
- Enumerable Module
- Enumerator Class
- Hash Methods
- Hash
- Length vs Size vs Count
- Queue
- Set
- Sized Queue
- Sorted Set
- Stack
DesignPatterns
- Design Patterns
- Adaptor Design Pattern
- Anti Pattern
- Common Design Patterns in Rails
- Decorator
- Model View Controller(MVC)
- Separation of Concerns
- Service Objects
- Single Responsibilty Principle (SRP)
- Singleton Design Pattern
Gems
- aasm
- Dependency Conflict
- Gemfile
- Rack
- Rake
- Reek - Code Smell Detector
- Resque
- Retriable
- Strong Migrations
- Zeitwerk - Code Loader
Rails
- ApiMode
  - Api Mode
  - Building JSON API
- CRUD
  - CRUD, Verbs and Actions
- Generate
  - Generate
  - model
- Routes
  - Breaking routes.rb into different files
  - On Member vs On Collection
  - Namespace vs Resources
  - Routes
  - Scope
- Install
- Before Action
- Callbacks
- Concerns
- Convention Over Configuration
- Generate UML Diagram
- HashWithIndifferent
- i18n
- Middleware
- Observers
- Performance
- Polymorphic Association
- Rake
- Security
- Session
- Terminal Commands
- Asset Pipeline to WebPacker
Rspec
- Rspec
- Testing
Ruby
- Advanced
  - ActiveRecord Scopes
  - Closures
  - Lambda vs Proc
  - Lambda
  - Meta Programming
  - Proc (Procdures)
- Blocks
  - Blocks
  - Yield
- Cloning
  - Clone
  - Deep Copy
  - Dup
  - Shallow Copy
  - Trivial vs No Trivial
- Conditionals
  - Conditional Assignment
  - If/Else
  - Lazy evaluation of conditionals
  - Switch
- Constants
  - Constants on Object
  - Constants
  - Freeze
  - Frozen String Literal
  - Frozen
  - Private Constant
- DataTypes
  - Convert
  - Float
  - Integer
  - String
  - Symbol
  - Type of Object
- Getter_Setter
  - Attr Accessor
  - Attr Reader
  - Attr Writer
  - Getter and Setter
- Instance_vs_Class
  - Class Method
  - Class Variable
  - Instance Method
  - Instance Variable
- InterestingKeyWords
  - &=
  - << Shovel Operator
  - <=> SpaceShip Operator
  - Double pipe equals/ Or Equals
  - Equal Tilde
  - Bang (!)
- Loops
  - Each
  - Loop
  - Step
  - Times
  - Until
  - While
- Memory
  - Garbage Collector
  - How ruby uses memory
- Methods
  - Double Splat
  - kwargs
  - Params Ruby
  - Send
  - Splat
  - Ways to call method
- OOPS
  - Class
  - Eigen Class
  - Any ruby objects can be evaluated as boolean
  - Include vs Extend
  - Include vs Require
  - Inheritance
  - Lexical Scoping
  - Mixins
  - Module Nesting
  - Module vs Class
  - Module
  - Object
  - Self
  - Singleton Class
  - Singleton Method
  - Super
- Ruby_vs_Java
  - Increment Operators
- Sorting
  - Custom Sort
  - Sort Hash
  - Sort String
  - Sort vs SortBy
  - Sort
- Threads
  - Thread
  - Thread pooling
- Typing
  - Duck Typing
  - Dynamic Typing
  - Typed
- Visibility
  - Private Class method
  - Private from Super class
  - Protected from super class
  - Public from super class
  - Method visibility in Ruby
- By Value vs By Ref
- Comments
- Ruby Documentation in Command Line
- Enums
- Error
- Print vs Puts vs P vs putc
- Rails vs Ruby Methods
- Respond to
Ruby_3
- Scalability
RubyMethods
- Collect
- Delete If
- Each Slice
- Eq vs Eql
- Lines
- Map vs Collect vs Each
- Reduce and Inject
- Select
- SubString
- Sum of Numbers
RubyVersionManager
- Ruby Version Manager
- RBENV
Testing
- Testing private methods
EventualConsistency
- Eventual Consistency
InterviewPrep
- Interview Prep
Mistakes
- Mistakes while learning Rails
Performance
- Performance
Pry
- pry
ReloadConsole
- Reload Console
UpgradingRuby
- Upgrading Ruby
Resources
- Blogs
- Books
- Conferences
- Courses
- Forum
- Online
- Popular Rails repo

Concerns

TODO

A Rails Concern is any module that extends ActiveSupport::Concern module.

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