Function sycamore_reactive::create_selector

pub fn create_selector<F, Out>(derived: F) -> ReadSignal<Out> where
    F: FnMut() -> Out + 'static,
    Out: PartialEq + 'static, 

Creates a memoized value from some signals. Also know as “derived stores”. Unlike create_memo, this function will not notify dependents of a change if the output is the same. That is why the output of the function must implement PartialEq.

To specify a custom comparison function, use create_selector_with.

Example

use sycamore_reactive::*;

let state = Signal::new(0);
let double = create_selector(cloned!((state) => move || *state.get() * 2));
assert_eq!(*double.get(), 0);

state.set(1);
assert_eq!(*double.get(), 2);