Len.max constructor

Len.max(
  1. int max, {
  2. String? long,
})

Constrains the length (number of items) to a maximum amount.

max the maximum number of items; it must be > 0. long the error message if the length > max; the default value is 'the length cannot be > max'.

Implementation

Len.max(int max, {String? long})
    : assert(max > 0),
      _lenVal = _InputLen(
        (int len) => len > max ? long ?? 'the length cannot be > $max' : null,
      );