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quanzhanying / fullstack-course

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what is "<<"? #49

Closed DJ-MinorG closed 8 years ago

DJ-MinorG commented 8 years ago

What does << mean? participated_groups << group

chpwang commented 8 years ago

【以下答案抄袭自 @xdite 】针对 array 数据类型的操作符，意思是把左边的值 append （插入）到右边的 array 里

DJ-MinorG commented 8 years ago

@chpwang 写反了吧？是右边插入到左边，如 participated_groups << group