Provide default type to first() and last() (#1676)

immutable-js · Jan 17, 2020 · 91c7c1e · 91c7c1e · yasinkocak · Jan 22, 2020
1 parent 751082f
commit 91c7c1e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/type-definitions/Immutable.d.ts b/type-definitions/Immutable.d.ts
@@ -3878,15 +3878,15 @@ declare module Immutable {
      * In case the `Collection` is empty returns the optional default
      * value if provided, if no default value is provided returns undefined.
      */
-    first<NSV>(notSetValue?: NSV): V | NSV;
+    first<NSV = undefined>(notSetValue?: NSV): V | NSV;
 
     /**
      * In case the `Collection` is not empty returns the last element of the
      * `Collection`.
      * In case the `Collection` is empty returns the optional default
      * value if provided, if no default value is provided returns undefined.
      */
-    last<NSV>(notSetValue?: NSV): V | NSV;
+    last<NSV = undefined>(notSetValue?: NSV): V | NSV;
 
     // Reading deep values