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据说优秀的代码没有 else？
source link: https://www.v2ex.com/t/447915
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程序员 - @GoPHP - 多个 if else 嵌套的代码估计大家都见过。。。头疼！但是其实很多 if else 可以简化成一个 if，不需要 else，举个例子：```$books = getByAFunc(
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