Ruby Yield

ruby_yield.rb

# Yield in Ruby allow you to pass a block implicitly which not only makes it faster
# to type out this pattern but it also faster to execute! 

# Regular Block Syntax
def calculate(a, b, action)
  action.call(a,b)
end

# Defining the lambda add and subtract
add = lambda {|a,b| a+b}
subtract = lambda {|a,b| a-b}

puts calculate(10,5, add)
puts calculate(10,5, subtract)
# Returns
"15"
"5"

#Yield Syntax
def calculate(a, b)
  yield(a,b)
end

puts calculate(10,5){|a,b| a+b} #Add
puts calculate(10,5){|a,b| a-b} #Subtract

# Returns
"15"
"5"