isAlphaDash top-level property

Matcher isAlphaDash
final

Asserts that a String is alphanumeric, but also lets it contain dashes or underscores.

Implementation

final Matcher isAlphaDash = predicate(
  (dynamic value) => value is String && _alphaDash.hasMatch(value),
  'alphanumeric (dashes and underscores are allowed)',
);