Determine whether a given collection only contains a single unique object - CSharp System.Collections.Generic

CSharp examples for System.Collections.Generic:ICollection

  1. HOME
  2. CSharp
  3. System.Collections.Generic
  4. ICollection

Description

Determine whether a given collection only contains a single unique object

Demo Code

/*// ww w. j a v a  2  s  .  c  o  m
 * Copyright ? 2002-2011 the original author or authors.
 * 
 * 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.Reflection;
using System.Collections;
using System;

public class Main{
        /// <summary>
        /// Determine whether a given collection only contains
        /// a single unique object
        /// </summary>
        /// <param name="coll"></param>
        /// <returns></returns>
        public static bool HasUniqueObject(ICollection coll)
        {
            if (coll.Count == 0)
            {
                return false;
            }
            object candidate = null;
            foreach (object elem in coll)
            {
                if (candidate == null)
                {
                    candidate = elem;
                }
                else if (candidate != elem)
                {
                    return false;
                }
            }
            return true;
        }
}

Related Tutorials