diff --git a/01.workspace/heave/src/imp/catalog_for_each.rs b/01.workspace/heave/src/imp/catalog_for_each.rs
new file mode 100644
index 0000000..61eea5e
--- /dev/null
+++ b/01.workspace/heave/src/imp/catalog_for_each.rs
@@ -0,0 +1,16 @@
+use crate::*;
+
+impl Catalog {
+    pub fn for_each<T, F>(&self, predicate: F) -> Result<(), FailedTo>
+    where
+        T: EAV,
+        F: Fn(&T) -> (),
+    {
+        self.with_items(|items| {
+            Ok(items
+                .values()
+                .flat_map(|entity| T::try_from(entity.clone()).map_err(|_| FailedTo::ConvertEntity))
+                .for_each(|item| predicate(&item)))
+        })
+    }
+}
diff --git a/01.workspace/heave/src/imp/mod.rs b/01.workspace/heave/src/imp/mod.rs
index af8b38a..9c43247 100644
--- a/01.workspace/heave/src/imp/mod.rs
+++ b/01.workspace/heave/src/imp/mod.rs
@@ -1,6 +1,7 @@
 pub mod bool_try_from_value;
 pub mod catalog_contains_key;
 pub mod catalog_delete;
+pub mod catalog_for_each;
 pub mod catalog_get;
 pub mod catalog_get_by;
 pub mod catalog_init;