Yield is a keyword that allows you to execute a block of code passed to a method.
def hello
puts "Hello " + yield
end
hello do
"David"
end
# returns "Hello David"Yield can also be passed arguments:
def hello(arg)
puts "Hello " + yield(arg)
end
hello("Dear") do |arg|
"#{arg} David"
end
# returns "Hello Dear David"