Computed<T> class abstract interface

A reactive computed value that derives from other signals.

Computed values automatically recalculate when their dependencies change. They are lazily evaluated, meaning they only recompute when accessed and their dependencies have changed.

Computed values are read-only and cannot be directly set.

Example:

final count = signal(2);
final doubled = computed((prev) => count() * 2);
print(doubled()); // prints: 4
count(3);
print(doubled()); // prints: 6

Implemented types

• Signal<T>

Implementers

• WritableComputed

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() → T

Reads the current value of the signal.

inherited

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