Double Question Mark Dart
Double Question Mark Dart. For example, a variable of type int? // this means if b is null then set it equal to hello.
Dart double question mark code answer's // this means a equals b, but if b is null then a equals 'hello'. String a = b ?? This means a equals b, but if b is null then a equals 'hello'.
You Can Make A Variable Nullable By Putting A Question Mark (?) At The End Of Its Type.
Take the following expression, for example. String a = b ?? For example, a variable _contacts?
If The Left One Was.
What it does is simply return the object if it’s not null or return the object in the right side of the ?? Double question mark in flutter; This means a equals b, but if b is null then a equals 'hello'.
Dart Syntax Double Question Mark;
Double question mark operator means if null. Take the following expression, for example. This is useful if you want null aware returns.
Double Question Mark Operator Means If Null.
Double question mark condition flutter; Take the following expression, for example. This means a equals b, but if b is null then a equals 'hello'.
Otherwise, Don 'T Change It.
This means a equals b, but if b is null then a equals 'hello'. Contributed on jan 17 2020. Dart syntax double question mark;
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