irridescentrambler

# A simple class in Ruby
class Human
  def introduce
    "Hi, I am a #{self.class.name}"
  end
end

Human.ancestors
#=> [Human, Object, Kernel, BasicObject]
# Object is present in Human class's ancestor tree.

irridescentrambler

require 'active_record'

ActiveRecord::Base.method(:new).owner
#=> ActiveRecord::Inheritance::ClassMethods

ActiveRecord::Base.method(:create).owner
#=> ActiveRecord::Persistence::ClassMethods

ActiveRecord::Base.method(:update).owner
#=> ActiveRecord::Querying

irridescentrambler

module Configurable
  def is_a
    wrapper(true)
  end

  def is_not_a
    wrapper(false)
  end

  private

irridescentrambler

[1,2,3,4,5].method(:length).source_location
#=> nil

"Ruby".method(:concat).source_location
#=> nil

class Array
  def subset?(sub_array)
    sub_array.each do |element|
      return false unless self.include?(element)

irridescentrambler

class Human
  attr_accessor :first_name, :last_name
  
  def initialize(first_name, last_name)
    @first_name = first_name
    @last_name = last_name
  end
  
  def full_name
    "#{first_name} #{last_name}"

irridescentrambler

import { React } from 'react';
import Axios from 'axios';

class Demo extends React.Component{
  initialize(){
    this.state = {
      userInput: nil,
      employees: [],
      status: nil
    }