mykiy

1) Explain calling super and calling super() and give some example?
      super and super() both inherits methods from parent class. super allows the arguments but super() dont allow the arguments.
      Ex:
      --
         class Niyati
           def process(person,work)
              "I am #{person} and am a #{work}"
           end
         end
         

mykiy

=> name/value pairs
 { 
  "name":"value"
 }
=> supports 
  number, strings, boolean, nil, array
=> 
{
  "name":"value",
  "array": [ 1,2,3 ],

mykiy

arr = [4,1,2,7,"M","A","V"]
arr.partition { |a| a.is_a? String }.map(&:sort).flatten
p arr
=>
["A","V","M",1,2,4,7]
-------
a = [1, "A", nil, "M", "", '']
a.reject!{|a| a.nil? || a.to_s.empty? }
p a
=> 

mykiy

movies = {
 Ravanan: 4.8,
 Thanioruvan: 4.5,
 payanangal: 4
}

puts "What would you like to do?"
puts "-- Type 'add' to add a movie."
puts "-- Type 'update' to update a movie."
puts "-- Type 'display' to display all movies."

mykiy

arr = [1,2,3,4,5]
arr.each { |n| n + 2 }
arr 
=> [1,2,3,4,5]
arr.map! { |n| n + 2 }
arr
=> 
[3,4,5,6,7]
arr.collect! { |n| n + 2 }
arr

mykiy

#reduce
def sum(*args) #sum method accepts many number of arguments that method passed
  args.reduce(0, :+) #reduce will reduce the array in single number, 0 is the initial value and + tells the reduce method to perform addition
end
sum(1,2,3,4)
=>
10
-----
multiplication

mykiy

l = -> (name) { puts "#{name}" }
l.call("velu")
=> 
velu
--------

l = -> (num) { num * 5 } # l  is the variable which stores the block of code, when we calls the l the block of code will be executed.
l.call(5) #Another important thing is lambda is an object.
=> 
25

mykiy

p = Proc.new do #proc is a object, actually a block of code stored in a instance variable 
  "hello"
end
p.call

-----

p = Proc.new do |num|
  num * num
end

mykiy

class Work
  def initialize(name)
    @name = name
  end
  def name
    @name
  end
  def name=(name)
    @name = name
  end

mykiy

class Work 
  attr_accessor :name, :duration
end
job = Work.new("ROR learning", "1month")
job.name
=> "ROR learning"
job.name = "Ruby learning"
job.name
=> "Ruby learning"