Is it possible to override the null-coalescing operator for a class in C#? Say for example I want to return a default value if an instance is null and return the instance if it's not. The code would look like something like this: return instance ?? new MyClass("Default"); But what if I would like to use the null-coalescing opera...
Is there a VB.NET equivalent for C#'s ?? operator? ...
Is there a null coalescing operator in Javascript? For example, in C#, I can do this: String someString = null; var whatIWant = someString ?? "Cookies!"; The best approximation I can figure out for Javascript is using the conditional operator: var someString = null; var whatIWant = someString ? someString : 'Cookies!'; Which is so...
Hi guys, Can we use Coalesce operator(??) and conditional ternary operator(:) in VB.NET as in C#? ...
It would be really nice if C# allowed an ??= operator. I've found myself writing the following frequently: something = something ?? new Something(); I'd rather write it like this: something ??= new Something(); Thoughts? New language extensions are always controversial by their nature. ...
I'm tempted to lie and say that English is my second language, but the truth is that I just have no idea what 'Coalescing' means. I know what ?? 'does' in C#, but the name doesn't make sense to me. I looked up the word and I understand it to be a synonym for 'join'. 'Null Join Operator' still doesn't make sense. Can someone enlighten...
I was wondering about "??" signs in c# code.. what is it for? And how can i use it? what about "int?"? is it nullable int? See also: ?? Null Coalescing Operator —> What does coalescing mean? ...
Everyone knows that this is not thread safe: public StringBuilder Builder { get { if (_builder != null) _builder = new StringBuilder(); return _builder; } } What about this? public StringBuilder Builder { get { return _builder ?? (_builder = new StringBuilder()); } } ...
I've looked around a little and haven't found an equivalent question. Is this bad coding practice? I can read it easily, but is it too cryptic for someone reading the code? bool? testBool = null; string result; result = (testBool ?? false ? "Yes" : "No"); Edit: My apologies to everyone for some horrible code! Here is a working e...
I have a method that will receive a string, but before I can work with it, I have to convert it to int. Sometimes it can be null and I have to change its value to "0". Today I have: public void doSomeWork(string value) { int SomeValue = int.Parse(value ?? "0"); //it can throw an exception(i know) } I did it, but my boss asked me t...
I'm writing a C# routine to call a stored proc. In the parameter list I'm passing in, it is possible that one of the values can legally be null. So I thought I'd use a line like this: cmd.Parameters.Add(new SqlParameter("@theParam", theParam ?? DBNull.Value)); Unfortunately, this returns the following error: CS0019: Operator '??...
I have a number of methods doing next: var result = command.ExecuteScalar() as Int32?; if(result.HasValue) { return result.Value; } else { throw new Exception(); // just an example, in my code I throws my own one } I wish I could use operator ?? like this: return command.ExecuteScalar() as Int32? ?? throw new Eception(); but ...
is there a C++ equivalent for C# null coalescing operator? i am doing too many null checks in my code.. so was looking for a way to reduce the amount of null code ...
myFoo = myFoo ?? new Foo(); instead of if (myFoo == null) myFoo = new Foo(); Am I correct in thinking that the first line of code will always perform an assignment? Also, is this a bad use of the null-coalescing operator? ...
I started to really like C#'s ?? operator. And I am quite used to the fact, that where there is something handy in some language, it's most probably in Perl too. However, I cannot find ?? equivalent in Perl. Is there any? ...
Below is some linqpad test code. When this runs it errors because the second instance of "item" has a null list of subitems as opposed to an empty list. I want to treat both situations (null or empty list) in exactly the same way but I wondered if there was a cleaner way than just putting a null check on the list and initialising an emp...
Everyone knows at least two common c# idioms including coalesce operator: a singleton one: return _staticField = _staticField ?? new SingletonConstructor(); and a chain one: notNullableResult = nullable1 ?? nullable2 ?? nullable3 ?? default(someType); it's readable, consistent, worth using and recognizable in code. But, unfortu...
If this is a duplicate please point me to it and I'll close, I couldn't find anything. Something I find myself doing more and more is checking a string for empty (as in "" or null) and a conditional operator. A current example: s.SiteNumber.IsNullOrEmpty() ? "No Number" : s.SiteNumber; This is just an extension method, it's equivale...
Do you think that C# will support something like ??= operator? Instead of this: if (list == null) list = new List<int>(); It might be possible to write: list ??= new List<int>(); Now, I could use (but it seems to me not well readable): list = list ?? new List<int>(); ...
Is it possible to use together any way operator ?? and operator && in next case: bool? Any { get { var any = this.ViewState["any"] as bool?; return any.HasValue ? any.Value && this.SomeBool : any; } } This means next: if any is null then this.Any.HasValue return false if any has value, then it returns value cons...