kotlin-运行vs猫王运算符-有什么区别? [英] kotlin - run vs elvis operator - what is the difference?

问题描述

im试图了解kotlin中以下两段代码之间的区别:

im trying to understand the difference between the following two pieces of code in kotlin:

myVar?.let { print(it) } ?: run { print("its null folks") }

vs

myVar?.let { print(it) } ?:  print("its null folks")

它们等效吗?运行只是为了使我们可以使用代码块，而另一个仅用于单个语句?

are they equivalent ? is run just so we can use a block of code and the the other is for just a single statement ?

推荐答案

是的，它们是等效的. run允许您在elvis运算符的右侧使用多个语句；在这种情况下，只有一个，因此不需要run.

Yes, they are equivalent. run allows you to use multiple statements on the right side of an elvis operator; in this case there's only one, so run is not needed.

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