The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operand .
Read moreHow do you use late keyword in darts?
Use the late keyword to initialize a variable when it is first read, rather than when it’s created . It’s common to use late in combination with final , to defer the creation of read-only variables to when they are first read.
Read moreWhat does null safety mean?
For us, in the context of null safety, that means that if an expression has a static type that does not permit null , then no possible execution of that expression can ever evaluate to null . The language provides this guarantee mostly through static checks, but there can be some runtime checks involved too.
Read moreIS null safety compulsory in Flutter?
There are many reasons to migrate Flutter apps to null safety, like those mentioned above, and it’s a must-do . This feature is a breaking change and previously written apps will not compile with the null checker on which might tempt some lazy developers to not activate it.23 Mar 2021
Read moreHow do you fix a null safety Flutter?
Migrating to null safety
Read moreHow do you check if a variable is null in darts?
Checking Nulls and Null-Aware Operators in Dart
Read moreHow do you use null safety in darts?
The Dart language now supports sound null safety! When you opt into null safety, types in your code are non-nullable by default, meaning that variables can’t contain null unless you say they can . With null safety, your runtime null-dereference errors turn into edit-time analysis errors.
Read more