Convert an ICollection to an array, removing null values. Fast path for case where there are no null values. - CSharp System.Collections

CSharp examples for System.Collections:ICollection

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

Description

Convert an ICollection to an array, removing null values. Fast path for case where there are no null values.

Demo Code

// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System.Linq;
using System.Diagnostics.Contracts;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System;//from w  ww.  jav a  2s. c o  m

public class Main{
        /// <summary>
        /// Convert an ICollection to an array, removing null values. Fast path for case where there are no null values.
        /// </summary>
        public static T[] ToArrayWithoutNulls<T>(this ICollection<T> collection) where T : class
        {
            Contract.Assert(collection != null);

            T[] result = new T[collection.Count];
            int count = 0;
            foreach (T value in collection)
            {
                if (value != null)
                {
                    result[count] = value;
                    count++;
                }
            }
            if (count == collection.Count)
            {
                return result;
            }
            else
            {
                T[] trimmedResult = new T[count];
                Array.Copy(result, trimmedResult, count);
                return trimmedResult;
            }
        }
}

Related Tutorials