Extension for determining if two sequences are equal without creating a comparer

ICD.Common.Utils.Tests/Extensions/EnumerableExtensionsTest.cs

@@ -80,6 +80,16 @@ namespace ICD.Common.Utils.Tests.Extensions
             Assert.AreEqual(true, exists);
         }
 
+        [Test]
+        public void SequenceEqualTest()
+        {
+            int[] a = new int[] { 1, 2, 3, 4};
+            int[] b = new int[] { 1, 4, 9, 16};
+
+            Assert.IsFalse(a.SequenceEqual(b, (x, y) => x == y));
+            Assert.IsTrue(a.SequenceEqual(b, (x, y) => x * x == y));
+        }
+
         [Test]
         public void ScrambledEqualsTest()
         {

ICD.Common.Utils/Extensions/DictionaryExtensions.cs

@@ -286,6 +286,32 @@ namespace ICD.Common.Utils.Extensions
 			if (extends == null)
 				throw new ArgumentNullException("extends");
 
+			if (valueComparer == null)
+				throw new ArgumentNullException("valueComparer");
+
+			return extends.DictionaryEqual(other, valueComparer.Equals);
+		}
+
+		/// <summary>
+		/// Compares the keys and values of the dictionary to determine equality.
+		/// </summary>
+		/// <typeparam name="TKey"></typeparam>
+		/// <typeparam name="TValue"></typeparam>
+		/// <param name="extends"></param>
+		/// <param name="other"></param>
+		/// <param name="valueComparer"></param>
+		/// <returns></returns>
+		[PublicAPI]
+		public static bool DictionaryEqual<TKey, TValue>(this IDictionary<TKey, TValue> extends,
+														 IDictionary<TKey, TValue> other,
+														 Func<TValue, TValue, bool> valueComparer)
+		{
+			if (extends == null)
+				throw new ArgumentNullException("extends");
+
+			if (valueComparer == null)
+				throw new ArgumentNullException("valueComparer");
+
 			if (extends == other)
 				return true;
 			if (other == null)
@@ -298,7 +324,7 @@ namespace ICD.Common.Utils.Extensions
 				TValue secondValue;
 				if (!other.TryGetValue(kvp.Key, out secondValue))
 					return false;
-				if (!valueComparer.Equals(kvp.Value, secondValue))
+				if (!valueComparer(kvp.Value, secondValue))
 					return false;
 			}
 			return true;

ICD.Common.Utils/Extensions/EnumerableExtensions.cs

@@ -120,6 +120,46 @@ namespace ICD.Common.Utils.Extensions
 			return true;
 		}
 
+		/// <summary>
+		/// Compares the two sequences for identical values.
+		/// </summary>
+		/// <typeparam name="T"></typeparam>
+		/// <param name="extends"></param>
+		/// <param name="other"></param>
+		/// <param name="comparer"></param>
+		/// <returns></returns>
+		public static bool SequenceEqual<T>(this IEnumerable<T> extends, IEnumerable<T> other, Func<T, T, bool> comparer)
+		{
+			if (extends == null)
+				throw new ArgumentNullException("extends");
+
+			if (extends == null)
+				throw new ArgumentNullException("other");
+
+			if (comparer == null)
+				throw new ArgumentNullException("comparer");
+
+			using (IEnumerator<T> firstPos = extends.GetEnumerator())
+			{
+				using (IEnumerator<T> secondPos = other.GetEnumerator())
+				{
+					bool hasFirst = firstPos.MoveNext();
+					bool hasSecond = secondPos.MoveNext();
+
+					while (hasFirst && hasSecond)
+					{
+						if (!comparer(firstPos.Current, secondPos.Current))
+							return false;
+
+						hasFirst = firstPos.MoveNext();
+						hasSecond = secondPos.MoveNext();
+					}
+
+					return !hasFirst && !hasSecond;
+				}
+			}
+		}
+
 		/// <summary>
 		/// Compares two sequences for identical values, ignoring order.
 		/// </summary>
@@ -127,7 +167,8 @@ namespace ICD.Common.Utils.Extensions
 		/// <param name="extends"></param>
 		/// <param name="other"></param>
 		/// <returns></returns>
-		public static bool ScrambledEquals<T>(this IEnumerable<T> extends, IEnumerable<T> other)
+		public static
+			bool ScrambledEquals<T>(this IEnumerable<T> extends, IEnumerable<T> other)
 		{
 			if (extends == null)
 				throw new ArgumentNullException("extends");