Itertools::find_position: use find

Philippe-Cholet · hellow554 · phimuemue · phimuemue · commit cd6bd87562e6 · 2024-01-10T14:21:49.000Z
`find` usually rely on `try_fold` so this change should improve performance for iterators specializing `find/try_fold`.

Co-Authored-By: Marcel Hellwig &lt;ghpub@cookiesoft.de&gt;
Co-Authored-By: phimuemue &lt;157728+phimuemue@users.noreply.github.com&gt;
diff --git a/src/lib.rs b/src/lib.rs
@@ -1910,12 +1910,7 @@ pub trait Itertools: Iterator {
     where
         P: FnMut(&Self::Item) -> bool,
     {
-        for (index, elt) in self.enumerate() {
-            if pred(&elt) {
-                return Some((index, elt));
-            }
-        }
-        None
+        self.enumerate().find(|(_, elt)| pred(elt))
     }
     /// Find the value of the first element satisfying a predicate or return the last element, if any.
     ///

Original file line number	Diff line number	Diff line change
`@@ -1910,12 +1910,7 @@ pub trait Itertools: Iterator {`
`1910`	`1910`	`where`
`1911`	`1911`	`P: FnMut(&Self::Item) -> bool,`
`1912`	`1912`	`{`
`1913`		`- for (index, elt) in self.enumerate() {`
`1914`		`- if pred(&elt) {`
`1915`		`- return Some((index, elt));`
`1916`		`- }`
`1917`		`- }`
`1918`		`- None`
	`1913`	`+ self.enumerate().find(\|(_, elt)\| pred(elt))`
`1919`	`1914`	`}`
`1920`	`1915`	`/// Find the value of the first element satisfying a predicate or return the last element, if any.`
`1921`	`1916`	`///`