如何定义一次代码块多次使用？

b = lambda { puts "this is the block" }
callBlock &b

要么

b.call

带参数:

def call_block_name
    yield "Dave"
    yield "Mary"
    end

b = lambda { |s| puts "this is block #{s}" }
call_block_names &b

和

b.call("sam")