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问题描述
我总是用(A)可空<> .HasValue ,因为我喜欢的语义。不过,最近我在做别人的现有code基地,他们用(B)可空<> == NULL 完全代替。还有一个原因是使用一个比其他,抑或是纯粹的preference?
(一)
诠释?一个; 如果(a.HasValue) ...
(二)
诠释? B: 如果(B!= NULL) ...解决方案
编译器替换为空的比较通过调用 hasValue的,所以没有真正的区别。只要做到取其更可读/更有意义,你和你的同事。
I always used (a)Nullable<>.HasValue because I liked the semantics. However, recently I was working on someone else's existing code base where they used (b)Nullable<> == null exclusively instead. Is there a reason to use one over the other, or is it purely preference?
(a)
int? a; if(a.HasValue) ...(b)
int? b; if(b != null) ...解决方案
The compiler replaces null comparisons with a call to HasValue, so there is no real difference. Just do whichever is more readable/makes more sense to you and your colleagues.
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