Fields class final
Collection of fields for structs and tuples.
Manages a collection of Field instances, providing access by name or index. Handles validation, conversion to/from maps and lists.
Example
final fields = Fields([
Field(name: 'x', value: U32Value(10)),
Field(name: 'y', value: U32Value(20)),
]);
print(fields.length); // 2
print(fields.getValue('x').nativeValue); // 10
print(fields.toMap()); // {x: 10, y: 20}
Constructors
-
Fields(List<
Field> fields) - Creates a collection of fields.
-
Fields.fromList(List values, List<
FieldDefinition> definitions) -
Creates fields from a list of values and field definitions.
factory
-
Fields.fromMap(Map<
String, dynamic> map, List<FieldDefinition> definitions) -
Creates fields from a map of name->value pairs and field definitions.
factory
Properties
- first → Field
-
The first element.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- isEmpty → bool
-
Whether this collection has no elements.
no setterinherited
- isNotEmpty → bool
-
Whether this collection has at least one element.
no setterinherited
-
iterator
→ Iterator<
Field> -
A new
Iteratorthat allows iterating the elements of thisIterable.no setteroverride - last → Field
-
The last element.
no setterinherited
- length → int
-
The number of elements in this Iterable.
no setterinherited
-
names
→ List<
String> -
Returns all field names.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- single → Field
-
Checks that this iterable has only one element, and returns that element.
no setterinherited
-
values
→ List<
TypedValue> -
Returns all field values.
no setter
Methods
-
any(
bool test(Field element)) → bool -
Checks whether any element of this iterable satisfies
test.inherited -
cast<
R> () → Iterable< R> -
A view of this iterable as an iterable of
Rinstances.inherited -
contains(
Object? element) → bool -
Whether the collection contains an element equal to
element.inherited -
elementAt(
int index) → Field -
Returns the
indexth element.inherited -
every(
bool test(Field element)) → bool -
Checks whether every element of this iterable satisfies
test.inherited -
expand<
T> (Iterable< T> toElements(Field element)) → Iterable<T> -
Expands each element of this Iterable into zero or more elements.
inherited
-
firstWhere(
bool test(Field element), {Field orElse()?}) → Field -
The first element that satisfies the given predicate
test.inherited -
fold<
T> (T initialValue, T combine(T previousValue, Field element)) → T -
Reduces a collection to a single value by iteratively combining each
element of the collection with an existing value
inherited
-
followedBy(
Iterable< Field> other) → Iterable<Field> -
Creates the lazy concatenation of this iterable and
other.inherited -
forEach(
void action(Field element)) → void -
Invokes
actionon each element of this iterable in iteration order.inherited -
getByName(
String name) → Field - Returns the field with the given name.
-
getValue(
String name) → TypedValue - Returns the value of the field with the given name.
-
join(
[String separator = ""]) → String -
Converts each element to a String and concatenates the strings.
inherited
-
lastWhere(
bool test(Field element), {Field orElse()?}) → Field -
The last element that satisfies the given predicate
test.inherited -
map<
T> (T toElement(Field e)) → Iterable< T> -
The current elements of this iterable modified by
toElement.inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
reduce(
Field combine(Field value, Field element)) → Field -
Reduces a collection to a single value by iteratively combining elements
of the collection using the provided function.
inherited
-
singleWhere(
bool test(Field element), {Field orElse()?}) → Field -
The single element that satisfies
test.inherited -
skip(
int count) → Iterable< Field> -
Creates an Iterable that provides all but the first
countelements.inherited -
skipWhile(
bool test(Field element)) → Iterable< Field> -
Creates an
Iterablethat skips leading elements whiletestis satisfied.inherited -
take(
int count) → Iterable< Field> -
Creates a lazy iterable of the
countfirst elements of this iterable.inherited -
takeWhile(
bool test(Field element)) → Iterable< Field> -
Creates a lazy iterable of the leading elements satisfying
test.inherited -
toList(
{bool growable = true}) → List< Field> -
Creates a List containing the elements of this Iterable.
inherited
-
toMap(
) → Map< String, dynamic> - Converts fields to a map of name->native value.
-
toNativeList(
) → List - Converts fields to a list of native values.
-
toSet(
) → Set< Field> -
Creates a Set containing the same elements as this iterable.
inherited
-
toString(
) → String -
Returns a string representation of (some of) the elements of
this.override -
tryGetByName(
String name) → Field? - Tries to get the field with the given name.
-
validateAgainst(
List< FieldDefinition> definitions) → void - Validates all fields against their definitions.
-
where(
bool test(Field element)) → Iterable< Field> -
Creates a new lazy Iterable with all elements that satisfy the
predicate
test.inherited -
whereType<
T> () → Iterable< R> -
Creates a new lazy Iterable with all elements that have type
T.inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
-
operator [](
int index) → Field - Returns field at the given index.