adrian/MainUtil.cs
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Change Fillers in Enumerables

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* Fillers should not get a value from the array
* Add Fillers for lists
* FoldL for functions without return values
* Add stream copy compatibility function
This commit is contained in:
Adrian 2016-02-15 13:12:06 +01:00
parent d74b04d447
commit 69a8cbac86
2 changed files with 29 additions and 9 deletions
src/main/AdrianKousz.Util
Enumerables.csMisc.cs

29
src/main/AdrianKousz.Util/Enumerables.cs
View file

@ -10,21 +10,28 @@ namespace AdrianKousz.Util
{
#region Fillers
public static T[] Fill<T>(this T[] array) where T : new() { return Fill(array, (i, x) => new T()); }
public static T[] Fill<T>(this T[] array, T value) { return Fill(array, (i, x) => value); }
public static T[] Fill<T>(this T[] array, Func<int, T> f) { return Fill(array, (i, x) => f(i)); }
public static T[] Fill<T>(this T[] array, Func<T> f) { return Fill(array, (i, x) => f()); }
public static T[] Fill<T>(this T[] array, Func<T, T> f) { return Fill(array, (i, x) => f(x)); }
public static T[] Fill<T>(this T[] array, Func<int, T, T> f)
public static T[] Fill<T>(this T[] array) where T : new() { return Fill(array, i => new T()); }
public static T[] Fill<T>(this T[] array, T value) { return Fill(array, i => value); }
public static T[] Fill<T>(this T[] array, Func<T> f) { return Fill(array, i => f()); }
public static T[] Fill<T>(this T[] array, Func<int, T> f)
{
var min = array.GetLowerBound(0);
var max = array.GetUpperBound(0);
for (var i = min; i <= max; i++)
array[i] = f(i, array[i]);
array[i] = f(i);
return array;
}
public static IList<T> Fill<T>(this IList<T> list, int count) where T : new() { return Fill(list, i => new T(), count); }
public static IList<T> Fill<T>(this IList<T> list, T value, int count) { return Fill(list, i => value, count); }
public static IList<T> Fill<T>(this IList<T> list, Func<T> f, int count) { return Fill(list, i => f(), count); }
public static IList<T> Fill<T>(this IList<T> list, Func<int, T> f, int count)
{
for (var i = 0; i < count; i++)
list.Add(f(i));
return list;
}
#endregion
#region Functional Classics
@ -39,10 +46,12 @@ namespace AdrianKousz.Util
return -1;
}
public static void ForEach<T>(this IEnumerable<T> source, Action<int, T> f)
public static IEnumerable<T> ForEach<T>(this IEnumerable<T> source, Action<T> f) { return ForEach(source, (i, x) => f(x)); }
public static IEnumerable<T> ForEach<T>(this IEnumerable<T> source, Action<int, T> f)
{
var i = 0;
foreach (var el in source) f(i++, el);
return source;
}
// Linq: Select
@ -57,6 +66,8 @@ namespace AdrianKousz.Util
foreach (var el in source) if (f(el)) yield return el;
}
public static TResult FoldL<T, TResult>(this IEnumerable<T> source, TResult initial, Action<TResult, T> f)
{ return FoldL(source, initial, (folded, el) => { f(folded, el); return folded; }); }
public static TResult FoldL<T, TResult>(this IEnumerable<T> source, TResult initial, Func<TResult, T, TResult> f)
{
var folded = initial;

9
src/main/AdrianKousz.Util/Misc.cs
View file

@ -42,6 +42,15 @@ namespace AdrianKousz.Util
return new StreamWriter(s);
}
public static void CopyTo(this Stream sin, Stream sout) {
var bufferlength = 10240;
var buffer = new byte[bufferlength];
var read = 0;
while ((read = sin.Read(buffer, 0, bufferlength)) > 0) {
sout.Write(buffer, 0, read);
}
}
public static bool ParseBoolean(string s)
{
s = s.Trim().ToLower();