Pattern: Use of one-member abstract class
Issue: -
Unlike Java, Dart has first-class functions, closures, and a nice light syntax
for using them. If all you need is something like a callback, just use a
function. If you're defining a class and it only has a single abstract member
with a meaningless name like call or invoke, there is a good chance
you just want a function.
Example of correct code:
typedef bool Predicate(item);Example of incorrect code:
abstract class Predicate {
bool test(item);
}