double question mark operator means “if null “. Take the following expression, for example. String a = b ?? ‘hello’; This means a equals b , but if b is null then a equals ‘hello’ .4 Oca 2019
Read moreWhat does double question mark mean in laravel?
operator known as Null Coalescing Operator . It returns its first operand if it exists and is not NULL; otherwise, it returns its second operand. It evaluates from left to right.
Read moreWhat is double question mark react?
Conclusion. The JavaScript double question mark is also known as the nullish coalescing operator. It’s an operator that simply returns the right-side expression when the left side expression is either null or undefined .
Read moreWhat does two question marks together mean?
If double question marks are uses it is to emphasise something in return, usually from the shock of the previous thing said . For example, if I said: ‘My dog just died’ (sad, but used for example…) Someone may reply.
Read moreWhat does ~/ mean in Dart?
~/ Divide, returning an integer result . and ~/= integer division and assignment. There is not really an equivalent in Java. In Java the result is an integer if the result is assigned to an integer variable (not sure though, not a Java dev)
Read moreWhat is the operator in Dart?
The operators are special symbols that are used to carry out certain operations on the operands . The Dart has numerous built-in operators which can be used to carry out different functions, for example, ‘+’ is used to add two operands. Operators are meant to carry operations on one or two operands.
Read moreWhat is the double question mark operator?
The double question mark operator is called the nullish coalescing operator, and it’s a new feature of JavaScript ES2020 that allows you provide a default value to use when a variable expression evaluates to null or undefined .
Read more