fix(single): make iterable prototype single predicate an optional par…

…ameter again #83 (comment)
ReactiveX · Nov 5, 2017 · 2bea5ab · 2bea5ab
1 parent c9b870a
commit 2bea5ab
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/add/iterable-operators/single.ts b/src/add/iterable-operators/single.ts
@@ -6,11 +6,11 @@ import { single } from '../../iterable/single';
  */
 export function singleProto<T, S extends T>(
   this: IterableX<T>,
-  predicate: (value: T, index: number) => value is S
+  predicate?: (value: T, index: number) => value is S
 ): S | undefined;
 export function singleProto<T>(
   this: IterableX<T>,
-  predicate: (value: T, index: number) => boolean
+  predicate?: (value: T, index: number) => boolean
 ): T | undefined;
 export function singleProto<T>(
   this: IterableX<T>,