1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 // Generic utils similar to those from the C++ header <algorithm>. 18 19 #ifndef LIBTEXTCLASSIFIER_COMMON_ALGORITHM_H_ 20 #define LIBTEXTCLASSIFIER_COMMON_ALGORITHM_H_ 21 22 #include <algorithm> 23 #include <vector> 24 25 namespace libtextclassifier { 26 namespace nlp_core { 27 28 // Returns index of max element from the vector |elements|. Returns 0 if 29 // |elements| is empty. T should be a type that can be compared by operator<. 30 template<typename T> GetArgMax(const std::vector<T> & elements)31inline int GetArgMax(const std::vector<T> &elements) { 32 return std::distance( 33 elements.begin(), 34 std::max_element(elements.begin(), elements.end())); 35 } 36 37 // Returns index of min element from the vector |elements|. Returns 0 if 38 // |elements| is empty. T should be a type that can be compared by operator<. 39 template<typename T> GetArgMin(const std::vector<T> & elements)40inline int GetArgMin(const std::vector<T> &elements) { 41 return std::distance( 42 elements.begin(), 43 std::min_element(elements.begin(), elements.end())); 44 } 45 46 } // namespace nlp_core 47 } // namespace libtextclassifier 48 49 #endif // LIBTEXTCLASSIFIER_COMMON_ALGORITHM_H_ 50