Dart Null Map

A dart package that provides != null map operation extension (null map, nmap).

The null map operator applies the passed convert function on receiver if it is not null, returns null otherwise.

Note: this package is a temporary solution to the open Dart lang issue github.com/dart-lang/language/issues/361 while waiting for an actual language operator implementation.

Usage

final int? a = null;
final int b = 1;
                                     
print(a.nmap((n) => n + 1)); // null
print(b.nmap((n) => n + 1)); // 2

See implementation file for library source code.