Blocks In-depth: Closures

blocks_keep_binding.rb

def greet
  "Hello, #{yield}!"
end

name = "Omer"
greet { name } # => "Hello, Omer!"

eval_with_binding.rb

def puts_x(some_bindings)
eval("puts x", some_bindings)
end

x = "Yo!"
puts_x(binding)