54 lines
1.4 KiB
C#
54 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace UniversalEditor.Collections.Generic
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{
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/// <summary>
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/// Provides a <see cref="Dictionary" /> that automatically adds or updates a key or value when it is
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/// requested.
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/// </summary>
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/// <typeparam name="TKey">The type of the key part of the dictionary.</typeparam>
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/// <typeparam name="TValue">The type of the value part of the dictionary.</typeparam>
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public class AutoDictionary<TKey, TValue> : Dictionary<TKey, TValue>
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{
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public new TValue this[TKey key]
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{
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get { return this[key, default(TValue)]; }
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set
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{
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if (ContainsKey(key))
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{
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// we already contain an item with this key, so update the value accordingly
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base[key] = value;
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}
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else
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{
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// we do not already contain an item with this key, so create a new value
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base.Add(key, value);
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}
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}
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}
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public TValue this[TKey key, TValue defaultValue]
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{
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get
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{
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if (ContainsKey(key))
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{
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// we already contain an item with this key, so return the value accordingly
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return base[key];
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}
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else
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{
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// we do not already contain an item with this key, so create a new value set to the
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// specified default value and return that
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base.Add(key, defaultValue);
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return defaultValue;
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}
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}
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set { this[key] = value; }
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}
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}
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}
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