Merge pull request #4425 from lenguyenthanh/include-foldr-in-foldable…

…-doc Add `foldr` note to `Foldable` doc
typelevel · Apr 24, 2023 · 896f00c · 896f00c
2 parents bb443b8 + cb782bc
commit 896f00c
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/docs/typeclasses/foldable.md b/docs/typeclasses/foldable.md
@@ -126,3 +126,12 @@ after looking at only one value:
 ```scala mdoc
 Foldable[LazyList].foldRight(allFalse, Eval.True)((a,b) => if (a) b else Eval.False).value
 ```
+
+Unfortunately, since `foldRight` is defined on many collections - this
+extension clashes with the operation defined in `Foldable`.
+To get past this and make sure you're getting the lazy `foldRight` defined
+in `Foldable`, there's an alias `foldr`:
+
+```scala mdoc
+allFalse.foldr(Eval.True)((a,b) => if (a) b else Eval.False).value
+```