61 lines
3.5 KiB
C#
61 lines
3.5 KiB
C#
/*
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BSD 3-Clause License
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Copyright (c) 2017, B. Wofter
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace BWofter.Converters.Extensions
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{
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using System;
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using System.Collections.Generic;
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using System.Linq;
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/// <summary><para>A static class that provides LINQ extensions for <see cref="IEnumerable{T}"/> of <see cref="KeyValuePair{TKey, TValue}"/> values.</para></summary>
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public static class IEnumerableKeyValuePairExtensions
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{
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/// <summary><para>Returns a <see cref="Dictionary{TKey, TValue}"/> with the key type <typeparamref name="TKey"/> and value type <typeparamref name="TValue"/>,
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/// initialized with the values in <paramref name="dictionarySource"/>.</para></summary>
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/// <typeparam name="TKey"><para>The <see cref="Dictionary{TKey, TValue}"/> key type.</para></typeparam>
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/// <typeparam name="TValue"><para>The <see cref="Dictionary{TKey, TValue}"/> value type.</para></typeparam>
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/// <param name="dictionarySource"><para>An <see cref="IEnumerable{T}"/> of <see cref="KeyValuePair{TKey, TValue}"/> values that contain the initial data of the dictionary.</para></param>
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/// <returns><para><see cref="Dictionary{TKey, TValue}"/> with the key type <typeparamref name="TKey"/> and value type <typeparamref name="TValue"/>.</para></returns>
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public static Dictionary<TKey, TValue> ToDictionary<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> dictionarySource)
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{
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if (dictionarySource == null) throw new ArgumentNullException(nameof(dictionarySource));
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//Instantiate a new dictionary with a number of entries equal to the length of the source, then sets gD equal to the reference of dictionary. This is to prevent extra casting operations.
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Dictionary<TKey, TValue> dictionary = new Dictionary<TKey, TValue>(dictionarySource.Count());
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ICollection<KeyValuePair<TKey, TValue>> gD = dictionary;
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foreach (KeyValuePair<TKey, TValue> entry in dictionarySource)
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{
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//Add the key value pair to gD.
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gD.Add(entry);
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}
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return dictionary;
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}
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}
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}
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