| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package accord.utils; |
| |
| public interface IndexedFold<P1, Accumulate> extends IndexedBiFunction<P1, Accumulate, Accumulate> |
| { |
| /** |
| * Apply some merge function accepting a constant object parameter p1, and the prior output of this function |
| * or the initial value, to some element of a collection, with the index of the element provided. |
| * |
| * This function is used for efficiently folding over some subset of a collection. |
| */ |
| Accumulate apply(P1 p1, Accumulate p2, int index); |
| } |