多客拼团的注册方法，首先关注多客拼团公众号，然后依次点击进行注册，点击我要赚钱，进入多客商城，接着输入邀请注册码进行注册，注册成功之后，就可以开始选择自己需要购买的东西即可。
Is there any built in way to require that a block be passed to a Ruby method?I realize I can just raise a开发者_如何转开发n exception if block_given? is false, but is there some nicer way to do it?Sim
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