Consider using iterator extensions to make the writing of map expressions more concise #10
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Description
Your simple example has :
#[component]
async fn Items() -> String {
let data = load_data_async().await;
html! {
<ul>
{
data
.into_iter()
.map(|item| html! { <li>{ item }</li> })
.collect_fragment() // helper method to collect a list of components into a String
}
</ul>
}
}I propose to provide a map_fragment iterator extension that lets you write the following :
#[component]
async fn Items() -> String {
let data = load_data_async().await;
html! {
<ul>
{
data
.into_iter()
.map_fragment(|item| html! { <li>{ item }</li> })
}
</ul>
}
}Its pretty straight forward :
pub trait MapFragmentExt: Iterator {
fn map_fragment<F, B>(self, f: F) -> String
where
Self: Sized,
F: FnMut(Self::Item) -> B,
B: ToString;
}
impl<T> MapFragmentExt for T
where
T: Iterator,
{
fn map_fragment<F, B>(self, f: F) -> String
where
Self: Sized,
F: FnMut(Self::Item) -> B,
B: ToString,
{
self.map(f).map(|b| b.to_string()).collect::<Vec<_>>().join("")
}
}Metadata
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