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83 lines
3.2 KiB
C#
83 lines
3.2 KiB
C#
/*
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* Copyright 2018 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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namespace CommonUtil {
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public class Container {
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/// <summary>
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/// Compares two lists of strings to see if their contents are equal. The lists
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/// must contain the same strings, in the same order.
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/// </summary>
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/// <param name="l1">List #1.</param>
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/// <param name="l2">List #2.</param>
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/// <param name="comparer">String comparer (e.g. StringComparer.InvariantCulture). If
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/// null, the default string comparer is used.</param>
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/// <returns>True if the lists are equal.</returns>
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public static bool StringListEquals(IList<string> l1, IList<string>l2,
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StringComparer comparer) {
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// Quick check for reference equality.
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if (l1 == l2) {
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return true;
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}
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return Enumerable.SequenceEqual<string>(l1, l2, comparer);
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}
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/// <summary>
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/// Compares two Dictionaries to see if their contents are equal. Key and value types
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/// must have correctly-implemented equality checks. (I contend this works incorrectly
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/// for float -- 5.0f is equal to the integer 5.)
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/// </summary>
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/// <remarks>
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/// https://stackoverflow.com/q/3804367/294248
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///
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/// TODO: make this work right for float/int comparisons
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/// </remarks>
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/// <typeparam name="TKey">Dictionary key type.</typeparam>
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/// <typeparam name="TValue">Dictionary value type.</typeparam>
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/// <param name="dict1">Dictionary #1.</param>
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/// <param name="dict2">Dictionary #2.</param>
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/// <returns>True if equal, false if not.</returns>
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public static bool CompareDicts<TKey, TValue>(
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Dictionary<TKey, TValue> dict1, Dictionary<TKey, TValue> dict2) {
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if (dict1 == dict2) {
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return true;
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}
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if (dict1 == null || dict2 == null) {
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return false;
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}
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if (dict1.Count != dict2.Count) {
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return false;
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}
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#if false
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var valueComparer = EqualityComparer<TValue>.Default;
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foreach (var kvp in dict1) {
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TValue value2;
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if (!dict2.TryGetValue(kvp.Key, out value2)) return false;
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if (!valueComparer.Equals(kvp.Value, value2)) return false;
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}
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return true;
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#else
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// Check to see if there are any elements in the first that are not in the second.
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return !dict1.Except(dict2).Any();
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#endif
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}
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}
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}
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