ruby_yield_proc_小例子

先不多言，贴个例子来看看

 

def run_a_yield
  xyz = "This is xyz"
  yield
  puts "==>>" + xyz
end

#yield a block
run_a_yield{
  # puts "==>>" + xyz #Notice we cann't use the field defined in other scope!!!
  puts "fantaxy is here!"
}

def a_method
  puts "This is a_method"
end

#yield a method
# run_a_yield a_method # we cann't yield a block by this!!!
run_a_yield {a_method}

 

 

 

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