Recent questions tagged nullable

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nullable - Kotlin boxed Int are not the same

Please help me understand this piece of code in the kotlin docs:- val a: Int = 10000 print(a === a) // ... place or explain it a bit for me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nullable - MySQL Question - Unique Key Not functioning correctly, or am I misunderstanding?

I'm trying to create a relation where any of four different parts may be included, but any collection of the ... Any help would be appreciated! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nullable - Why don't I get a warning about possible dereference of a null in C# 8 with a class member of a struct?

In a C# 8 project with nullable reference types enabled, I have the following code which I think should give me a ... I don't; why is that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nullable - Why is this code invalid in C#?

The following code will not compile: string foo = "bar"; Object o = foo == null ? DBNull.Value : foo; ... boxing is involved in this question. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nullable - Set value to null in WPF binding

please take a look at the following line <TextBox Text="{Binding Price}"/> This Price property from above is a Decimal ... I can do it 'Xamly'? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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