Function create_reducer

pub fn create_reducer<T, Msg>(
    initial: T,
    reduce: impl FnMut(&T, Msg) -> T,
) -> (ReadSignal<T>, impl Fn(Msg))

An alternative to create_signal that uses a reducer to get the next value.

It uses a reducer function that takes the previous value and a message and returns the next value.

Returns a ReadSignal and a dispatch function to send messages to the reducer.

Params

• initial - The initial value of the state.
• reducer - A function that takes the previous value and a message and returns the next value.

Example

enum Msg {
    Increment,
    Decrement,
}

let (state, dispatch) = create_reducer(0, |&state, msg: Msg| match msg {
    Msg::Increment => state + 1,
    Msg::Decrement => state - 1,
});

assert_eq!(state.get(), 0);
dispatch(Msg::Increment);
assert_eq!(state.get(), 1);
dispatch(Msg::Decrement);
assert_eq!(state.get(), 0);