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by achew22 5726 days ago
I'm far from impressed with this. How is ?? any different from a guard ( || )? I use that all the freaking time in every language. I've never written a line of C# and even I know about the parallel module, how didn't that make the cut?
2 comments
mullr 5726 days ago
C# has || just like any other language, but objects aren't truthy and nulls aren't falsy. This was a good design decision, since it catches the common = vs. == error if(a=b) while doing the type check rather than silently doing the (probably) wrong thing. As a consequence, the || doesn't work as it does in other places. Hence ??.
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steverb 5725 days ago
?? is the null coalescing operator and it's neither new nor is it hidden.

It is damned handy though.

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newt 5725 days ago
Every language?

Java, as far as I know, does not allow if (someObject) where someObject is a class type. AFIAK, java only allows that if someObject is a bool, or possibly an int as well.

In strongly typed languages in general, null is not the same thing as false and not-null is not the same thing as true.

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