31 lines
1019 B
C#
31 lines
1019 B
C#
using System;
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using System.Linq;
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using System.Collections.Generic;
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public static class Collection {
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public static void ForEach<T>(this IEnumerable<T> x, Action<T> f)
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=> x.ToList().ForEach(f);
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/*
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public static ListI<Tuple<T,U>> Add<T,U>(this ListI<Tuple<T,U>> l, T x, U y)
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=> l.Add(Tuple.Create(x,y));
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*/
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// System.Collections.Immutable requires NuGet and is not available on repl.it
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public static List<T> Cons<T>(this List<T> l, T x) { l.Add(x); return l; }
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// Circumvent bug with collection initializers, tuples and
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// first-class functions by using repeated .Add()
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// See https://repl.it/@suzannesoy/WarlikeWorstTraining#main.cs
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public static List<Tuple<T,U>> Cons<T,U>(this List<Tuple<T,U>> l, T x, U y)
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=> l.Cons(Tuple.Create(x,y));
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public static List<Tuple<T,U,V>> Cons<T,U,V>(this List<Tuple<T,U,V>> l, T x, U y, V z)
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=> l.Cons(Tuple.Create(x,y,z));
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public static void Deconstruct<A, B>(this Tuple<A, B> t, out A a, out B b) {
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a = t.Item1;
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b = t.Item2;
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}
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} |