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Ruby Tutorial

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Ruby Control Statements

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Ruby Methods

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Ruby Classes and Methods

• Ruby Private Classes
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• Ruby Polymorphism
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Ruby Arrays

• Ruby Arrays
• Creating Array with Array.[](*args)
• Creating Array with Array.new(size, obj)
• Creating Array with Array.new(Array_object)
• Creating Array with Array.new(size){|index|}
• Creating Array with & Operator
• Creating Array with * Operator
• Creating Array with + Operator
• Creating Array with - Operator
• Accessing Array with Array.at() Method
• Accessing Array with Array.fetch() Method
• Accessing Array with Array.take() and Array.drop() Methods
• Accessing First/Last Element with Array.first and Array.last
• Deleting with Array.pop and Array.shift Methods
• Removing with Array.delete() and Array.delete_at()
• Removing with Array.compact and Array.uniq
• Finding Array Length
• Adding with << Operator
• Array Element Assignment (index)
• Array Element Assignment (start, length)
• Array Identity Check
• Comparing Arrays
• Creating 2D Arrays
• Ruby Array Methods

Ruby Sets

• Ruby Set
• Ruby Set Comparison
• Ruby Set disjoint? Method
• Ruby Set intersect? Method
• Ruby Set delete_if() & keep_if()
• Ruby Set Print Elements
• Ruby Set Length
• Ruby Set Element Presence
• Ruby Set Join Elements
• Ruby Set Common Elements
• Ruby Set Difference
• Ruby Set Merge
• Ruby Set Empty Check
• Ruby Set Delete/Replace Element

Ruby Strings

• Ruby Strings
• Ruby String Creation
• Ruby String Append
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• Ruby String Concatenation (+)
• Ruby concat() Method
• Ruby chomp Method
• Ruby Regular Expressions
• Ruby to_s Method

Ruby Classes & Objects

• Ruby OOP
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• Ruby Objects
• Ruby Constructors
• Ruby Base Class Constructor
• Ruby Inheritance
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Ruby Hash

• Ruby Hashes
• Ruby Hash Creation
• Ruby Hash < Operator
• Ruby Hash <= Operator
• Ruby Hash == Operator
• Ruby Hash > Operator
• Ruby Hash >= Operator

Ruby Tools

• Ruby Gems
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Ruby Functions

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• Lambdas vs Procs
• Splat Arguments

Ruby Built-in Functions

• Ruby alias vs alias_method
• Ruby at() Function
• Ruby clear() Function
• Ruby assoc() Function
• Ruby push() Function
• Ruby pop() Function
• Ruby reverse() Function
• Ruby reverse! Function
• Ruby concat() Function
• Ruby to_s() Function

Misc.

• Ruby Date & Time
• Ruby Threads
• Ruby Multithreading
• Ruby Modules
• Ruby Mixins
• Ruby Exception Handling
• Ruby Raise Exceptions
• Ruby Exception Class Methods
• Ruby CGI Programming
• Ruby Socket Programming
• Ruby Database Access
• Ruby Sending Email
• Ruby Wait
• Ruby Custom Error Logger

Ruby Programs

• Basic Programs
• if/else Programs
• case Statement Programs
• Looping Programs
• Classes & Objects Programs
• User-defined Functions Programs
• Blocks Programs
• Modules and Mixins Programs
• Strings Programs
• Arrays Programs
• Constructors/Destructors, Inheritance Programs
• Date and Time Programs
• Set Programs
• File Handling Programs
• Threading Programs
• Hashes Programs
• Directories Programs

# Ruby program to find the common 
# elements from two arrays

arr1 = ["RAM","KRISHNA","SHIV","GANESH"];
arr2 = ["KRISHNA","RAM"];

arr3 = arr1 & arr2;

print "Common array elements:\n#{arr3}";

Common array elements:
["RAM", "KRISHNA"]