Hashes in Ruby

Hashes

Total Months via hashes: 8 

#{numbers["two"]}
zero
5

working_with_hashesh.rb

#Playin with Hashes..:)

#--------------------------------------------------------------------------------------------------------------------------------
months = Hash.new

months["january"] = 1
months["july"] = 7

total_months = months["january"] + months["july"]

puts("Total Months via hashes: #{total_months} ")

puts "#{months["june"]}"

#note how a value of null is assigned to a hash of months .. as it was defined with no default initial value

#--------------------------------------------------------------------------------------------------------------------------------
#also check how puts is working without the use of parentheses..

numbers = Hash.new{"zero"}

puts '#{numbers["two"]}' # givin it this way won't work.. need to use double quotes...

puts "#{numbers["two"]}"


#--------------------------------------------------------------------------------------------------------------------------------

# usage of hash literals... as key value pairs.. Here we are using symbols.. but even quotes can be used.. as shown above..

week = Hash.new
week = { :sunday => 1, :monday => 2, :"tuesday" => 3, :wednesday => 4, :thursday => 5, :'fri day' => 6, :saturday => 7 }

puts "#{week[:thursday]}"