ruby on rails tutorial Chapter4 exercise4

4_6_4.rb

hsh1 = {first:"Satoshi",last:"Tanaka",age:"25"}
hsh2 = {last:"Suzuki",age:"30"}

#show the newest values 
puts hsh1.merge(hsh2)

#show old value when the key duplicated
puts hsh1.merge(hsh2){|key,oldv,newv|oldv}