Update foreach to use .fold()

bluss · bluss · commit fb513aa7f6e0 · 2016-10-20T18:06:45.000+02:00
For interesting reasons..
diff --git a/src/lib.rs b/src/lib.rs
@@ -985,9 +985,8 @@ pub trait Itertools : Iterator {
     fn foreach<F>(&mut self, mut f: F)
         where F: FnMut(Self::Item)
     {
-        for elt in self {
-            f(elt)
-        }
+        // use fold to exploit iterator-specific implementations
+        self.fold((), move |(), element| f(element))
     }
 
     /// `.collect_vec()` is simply a type specialization of `.collect()`,

Original file line number	Diff line number	Diff line change
`@@ -985,9 +985,8 @@ pub trait Itertools : Iterator {`
`985`	`985`	`fn foreach<F>(&mut self, mut f: F)`
`986`	`986`	`where F: FnMut(Self::Item)`
`987`	`987`	`{`
`988`		`- for elt in self {`
`989`		`- f(elt)`
`990`		`- }`
	`988`	`+ // use fold to exploit iterator-specific implementations`
	`989`	`+ self.fold((), move \|(), element\| f(element))`
`991`	`990`	`}`
`992`	`991`
`993`	`992`	/// `.collect_vec()` is simply a type specialization of `.collect()`,