ReqLen class

Convenient validator for required fields with length (number of items) constraints.

It is the composite of Req and Len validators.

Constructors

ReqLen(int len, {String? blank, String? diff})

Constrains the length (number of items).

ReqLen.max(int max, {String? blank, String? long})

Constrains the length or number of data items to a maximum amount.

ReqLen.min(int min, {String? blank, String? short})

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

ReqLen.range(int min, int max, {String? blank, String? short, String? long})

Constrains the length (number of items) within the range min–max.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call(Object? input) → String?

Valid - returns null - if input is neither null nor empty, and if its length is in a valid range.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited