Get Hash Code Deep - CSharp System

CSharp examples for System:Hash

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Description

Get Hash Code Deep

Demo Code

/*/*from   w  ww.  ja v a  2s  .  c  o  m*/
 * Original author: Nicholas Shulman <nicksh .at. u.washington.edu>,
 *                  MacCoss Lab, Department of Genome Sciences, UW
 *
 * Copyright 2011 University of Washington - Seattle, WA
 *
 * Licensed 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.
 */
using System.Text;
using System.Linq;
using System.Collections.Generic;
using System.Collections;
using System;

public class Main{
        public static int GetHashCodeDeep<T>(IList<T> list)
        {
            return list.Aggregate(0, (seed, item) => seed*397 + SafeGetHashCode(item));
        }
        public static int GetHashCodeDeep<TKey, TValue>(IDictionary<TKey, TValue> dict)
        {
            return dict.Aggregate(0, 
                (seed, keyValuePair) => seed ^ keyValuePair.GetHashCode()
            );
        }
        public static int SafeGetHashCode<T>(T item)
        {
            return Equals(null, item) ? 0 : item.GetHashCode();
        }
}

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