let if

October 13, 2022

daybook, rust | permalink

I've used the let if pattern before, but not enough to remember how it works, so had to refresh myself on it. It's very useful. Here's a sample from tp-updater:

let updated_indicators = if self.updated_indicators.is_empty() {
    html! { <p>{ "There are no recently updated indicators."}</p> }
} else {
    html! { <p>{ format!("{:#?}", self.updated_indicators) }</p> }
};