[GitHub] avplatonov commented on a change in pull request #5767: [ML] IGNITE-10573: Consistent API for Ensemble training

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avplatonov commented on a change in pull request #5767: [ML] IGNITE-10573: Consistent API for Ensemble training
URL: https://github.com/apache/ignite/pull/5767#discussion_r247865246
 
 

 ##########
 File path: modules/ml/src/main/java/org/apache/ignite/ml/util/Utils.java
 ##########
 @@ -130,4 +132,50 @@
                 Spliterators.spliteratorUnknownSize(iter, Spliterator.ORDERED),
                 false);
     }
+
+    /**
+     * Zips two streams (in functional sense of zipping) i.e. returns stream consisting
+     * of results of applying zipper to corresponding entries of two stream.
+     *
+     * @param a First stream.
+     * @param b Second stream.
+     * @param zipper Bi-function combining two streams.
+     * @param <A> Type of first stream entries.
+     * @param <B> Type of secong stream entries.
+     * @param <C> Type of zipper output.
+     * @return Two streams zipped together.
+     */
+    public static<A, B, C> Stream<C> zip(Stream<? extends A> a,
 
 Review comment:
   You don't use zip in code
   Remove it please

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