Powershell 7+ Powershell 7 introduces native null coalescing, null conditional assignment, and ternary operators in Powershell. Null Coalescing $null ?? 100 # Result is 100 “Evaluated” ?? (Expensive-Operation “Not Evaluated”) # Right side here is not evaluated Null Conditional Assignment $x = $null $x ??= 100 # $x is now 100 $x ??= 200 # … Read more
Sadly – no. The closest you can do is: int y = (x != null) ? x : -1; Of course, you can wrap this up in library methods if you feel the need to (it’s unlikely to cut down on length much), but at the syntax level there isn’t anything more succinct available.
This is Unity screwing with you. If you do this: MeshFilter GetMeshFilter() { MeshFilter temp = myGo.GetComponent<MeshFilter>(); if ( temp == null ) { Debug.Log( ” > Get Mesh Filter RETURNING NULL” ); return null; } return temp; } It works. Why? Because Unity has overridden Equals (and the == operator) on all Unity objects … Read more
The example you were quoting from uses LINQ to Objects, where the implicit lambda expressions in the query are converted into delegates… whereas you’re using EF or similar, with IQueryable<T> queryies, where the lambda expressions are converted into expression trees. Expression trees don’t support the null conditional operator (or tuples). Just do it the old … Read more
There is a new operator in php 5.3 which does this: ?: // A echo ‘A’ ?: ‘B’; // B echo ” ?: ‘B’; // B echo false ?: ‘B’; // B echo null ?: ‘B’; Source: http://www.php.net/ChangeLog-5.php#5.3.0
It’s the null coalescing operator. It was introduced in C# 2. The result of the expression a ?? b is a if that’s not null, or b otherwise. b isn’t evaluated unless it’s needed. Two nice things: The overall type of the expression is that of the second operand, which is important when you’re using … Read more
other = s or “some default value” Ok, it must be clarified how the or operator works. It is a boolean operator, so it works in a boolean context. If the values are not boolean, they are converted to boolean for the purposes of the operator. Note that the or operator does not return only … Read more
When your first argument is null, they’re basically the same except that the null coalescing won’t output an E_NOTICE when you have an undefined variable. The PHP 7.0 migration docs has this to say: The null coalescing operator (??) has been added as syntactic sugar for the common case of needing to use a ternary … Read more
When your first argument is null, they’re basically the same except that the null coalescing won’t output an E_NOTICE when you have an undefined variable. The PHP 7.0 migration docs has this to say: The null coalescing operator (??) has been added as syntactic sugar for the common case of needing to use a ternary … Read more
It’s the null coalescing operator, and quite like the ternary (immediate-if) operator. See also ?? Operator – MSDN. FormsAuth = formsAuth ?? new FormsAuthenticationWrapper(); expands to: FormsAuth = formsAuth != null ? formsAuth : new FormsAuthenticationWrapper(); which further expands to: if(formsAuth != null) FormsAuth = formsAuth; else FormsAuth = new FormsAuthenticationWrapper(); In English, it means … Read more