Results for &#x201C;Lists &amp; control flow&#x201D;

Narrow an object using a type pattern

C#: A successful is pattern introduces a strongly typed local variable.

Narrow an object with a pattern variable

Java: Pattern matching avoids a separate cast after a successful instanceof check.

Parse an enum name without throwing

C#: Combine TryParse and IsDefined when only named declared values should be accepted.

Pass behavior as a function delegate

C#: Func describes a callable with typed parameters and a return value.

Perform cleanup even after an exception

C#: A finally block runs after a handled failure as well as after success.

Provide a fallback for a nullable value

C#: The null-coalescing operator supplies a default only when the left side is null.

Represent a finite set of states

Java: Use an enum to prevent arbitrary strings from representing application states.

Return a value from a switch expression

Java: Use an exhaustive switch expression with a fallback for other input values.

Return multiple named values from a method

C#: Named value tuples give lightweight field names without a separate class.

Run a task on an executor and close it

Java: Java 21 ExecutorService supports try-with-resources to shut down after submitted work.

Run cleanup after a handled exception

Java: A finally block executes whether the protected operation succeeds or fails.

Transform an asynchronous result

Java: Chain thenApply and join a CompletableFuture to retrieve the completed value.