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Extension method for inverting a dictionary

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Chris Cameron 2018-02-22 15:06:57 -05:00
parent d4b0fc76cc
commit b0aa48803b
1 changed files with 16 additions and 0 deletions
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16
ICD.Common.Utils/Extensions/DictionaryExtensions.cs
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@ -386,5 +386,21 @@ namespace ICD.Common.Utils.Extensions
return extends.OrderByKey().Select(kvp => kvp.Value); return extends.OrderByKey().Select(kvp => kvp.Value);
} }
/// <summary>
/// Returns an inverse mapping of TValue -> TKey.
/// </summary>
/// <typeparam name="TKey"></typeparam>
/// <typeparam name="TValue"></typeparam>
/// <param name="extends"></param>
/// <returns></returns>
[PublicAPI]
public static Dictionary<TValue, TKey> ToInverse<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> extends)
{
if (extends == null)
throw new ArgumentNullException("extends");
return extends.ToDictionary(kvp => kvp.Value, kvp => kvp.Key);
}
} }
} }