给定此代码
myValue.number?.setScale(2).toString() ?: ""
I want it to return "" if number is null. But it just returns null. What concept did I not grasp here?
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给定此代码
myValue.number?.setScale(2).toString() ?: ""
I want it to return "" if number is null. But it just returns null. What concept did I not grasp here?
There is
toStringfor nullable types that returns"null"if reference (or expression) is null, so in your case,?: ""expression is unreachable. Add another null-safe call operator