Variable derive

Type Declaration

• • <
        V,
        const Deps extends Variable<any>[],
        Args extends
            {
                [K in string | number | symbol]: Deps[K] extends Variable<T>
                    ? T
                    : never
            },
    >(
        deps: Deps,
        fn: (...args: Args) => V,
    ): Variable<V>

  • Creates a derived Variable from multiple source Variables.

    Similar to merge but operates on Variables directly rather than Bindings, and returns a Variable instead of a Binding.

    Type Parameters

    • V
    • const Deps extends Variable<any>[]
    • Args extends { [K in string | number | symbol]: Deps[K] extends Variable<T> ? T : never }

    Parameters

    • deps: Deps

      Array of Variables to observe

    • fn: (...args: Args) => V

      Function that receives all current values and returns the derived value

    Returns Variable<V>

    A new Variable containing the derived value