Add ForBoth

doc/csc2.bat

@@ -0,0 +1,4 @@
+:: Compile bare .NET 2 with C# 4
+@echo off
+SET CSC=C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc
+%CSC% /nostdlib /noconfig /nowin32manifest "/lib:C:\Windows\Microsoft.NET\Framework\v2.0.50727" "/r:mscorlib.dll" %*

src/main/AdrianKousz.Util/DateTimes.cs

@@ -6,11 +6,18 @@ namespace AdrianKousz.Util
 	{
 		private static readonly DateTime Epoch = new DateTime(1970, 1, 1);
 
-		public static DateTime FromUnixTime(double timestamp) {
+		public static DateTime ToDateTime(this int timestamp)
+		{
 			return Epoch.AddSeconds(timestamp);
 		}
 
-		public static double ToUnixTime(this DateTime t) {
+		public static DateTime ToDateTime(this double timestamp)
+		{
+			return Epoch.AddSeconds(timestamp);
+		}
+
+		public static double ToUnixTime(this DateTime t)
+		{
 			return t.Subtract(Epoch).TotalSeconds;
 		}
 	}

src/main/AdrianKousz.Util/Enumerables.cs

@@ -20,8 +20,8 @@ namespace AdrianKousz.Util
 		}
 
 		public static ICollection<T> Fill<T>(this ICollection<T> list, int count) where T : new() { return Fill(list, count, () => new T()); }
-		public static ICollection<T> Fill<T>(this ICollection<T> list, int count, T value) { return Fill(list, count, () => value); }
+		public static TColl Fill<T, TColl>(this TColl list, int count, T value) where TColl : ICollection<T> { return Fill(list, count, () => value); }
-		public static ICollection<T> Fill<T>(this ICollection<T> list, int count, Func<T> f)
+		public static TColl Fill<T, TColl>(this TColl list, int count, Func<T> f) where TColl : ICollection<T>
 		{
 			for (var i = 0; i < count; i++) list.Add(f());
 			return list;
@@ -29,21 +29,27 @@ namespace AdrianKousz.Util
 
 		#endregion
 
-		#region Anonymous Type Helpers
+		#region Type Helpers
 
 		public static T[] CreateArray<T>(this T example, int count)
 		{
 			return new T[count];
 		}
 
-		public static List<T> CreateList<T>(this T example)
+		public static List<T> CreateList<T>(this T example, int count = 12)
 		{
-			return new List<T>();
+			return new List<T>(count);
 		}
 
-		#endregion
+		public static T[] NewArray<T>(this IEnumerable<T> source, int count)
+		{
+			return new T[count];
+		}
 
-		#region Materializers
+		public static List<T> NewList<T>(this IEnumerable<T> source, int count = 12)
+		{
+			return new List<T>(count);
+		}
 
 		public static List<T> ToList<T>(this IEnumerable<T> source)
 		{
@@ -69,19 +75,26 @@ namespace AdrianKousz.Util
 			return -1;
 		}
 
-		public static IEnumerable<T> ForEach<T>(this IEnumerable<T> source, Action<T> f)
+		public static void ForEach<T>(this IEnumerable<T> source, Action<T> f)
 		{
 			foreach (var el in source) f(el);
-			return source;
 		}
 
-		public static IDictionary<K, V> ForEach<K, V>(this IDictionary<K, V> source, Action<K, V> f)
+		public static void ForEach<K, V>(this IDictionary<K, V> source, Action<K, V> f)
 		{
 			foreach (var el in source) f(el.Key, el.Value);
-			return source;
 		}
 
-		// Linq: Select
+		public static void ForBoth<T1, T2>(this IEnumerable<T1> s1, IEnumerable<T2> s2, Action<T1, T2> f)
+		{
+			using (var en1 = s1.GetEnumerator())
+			using (var en2 = s2.GetEnumerator())
+			{
+				while (en1.MoveNext() && en2.MoveNext())
+					f(en1.Current, en2.Current);
+			}
+		}
+
 		public static IEnumerable<TResult> Map<T, TResult>(this IEnumerable<T> source, Func<T, TResult> f)
 		{
 			var result = GetList<T, TResult>(source);
@@ -89,7 +102,6 @@ namespace AdrianKousz.Util
 			return result;
 		}
 
-		// Linq: Where
 		public static IEnumerable<T> Filter<T>(this IEnumerable<T> source, Func<T, bool> f)
 		{
 			var result = GetList<T, T>(source);
@@ -106,31 +118,21 @@ namespace AdrianKousz.Util
 			return result;
 		}
 
-		// Linq: Aggregate
 		public static T FoldL1<T>(this IEnumerable<T> source, Func<T, T, T> f)
 		{
 			using (var en = source.GetEnumerator())
 			{
 				if (!en.MoveNext()) throw new InvalidOperationException("No elements");
-				T result = en.Current;
+				var result = en.Current;
 				while (en.MoveNext()) result = f(result, en.Current);
 				return result;
 			}
 		}
 
-		#endregion
-
-		#region Zippers
-
 		public static IDictionary<K, V> ToDictionary<K, V>(this IEnumerable<K> ks, IEnumerable<V> vs)
 		{
 			var result = new Dictionary<K, V>();
-			using (var en1 = ks.GetEnumerator())
+			ForBoth(ks, vs, (k, v) => { result[k] = v; });
-			using (var en2 = vs.GetEnumerator())
-			{
-				while (en1.MoveNext() && en2.MoveNext())
-					result[en1.Current] = en2.Current;
-			}
 			return result;
 		}
 
@@ -148,12 +150,7 @@ namespace AdrianKousz.Util
 		public static IEnumerable<TResult> Zip<T1, T2, TResult>(this IEnumerable<T1> s1, IEnumerable<T2> s2, Func<T1, T2, TResult> f)
 		{
 			var result = GetList<T1, TResult>(s1);
-			using (var en1 = s1.GetEnumerator())
+			ForBoth(s1, s2, (e1, e2) => { result.Add(f(e1, e2)); });
-			using (var en2 = s2.GetEnumerator())
-			{
-				while (en1.MoveNext() && en2.MoveNext())
-					result.Add(f(en1.Current, en2.Current));
-			}
 			return result;
 		}