public static T Fold <T>(Fold函数 <T> func, T[] arr)
{
T val = arr[0];
foreach (T item in arr)
{
val = func(val, item);
}
return(val);
}
static void Main(string[] args)
{
var func1 = new Reduce函数 <int>(max);
var func2 = new Reduce函数 <string>(longest);
var func3 = new Map函数 <int>(plus1);
var func4 = new Fold函数 <int>(plus2);
Console.WriteLine(Reduce <int>(func1, new int[] { 1, 2, 3, 5, 100 })); //Output: 100
Console.WriteLine(Reduce <string>(func2, new string[] { "你好，世界", "Hello, world", "Bonjour, la monde" })); //Output: Bonjour, la monde
var arr = Map <int>(func3, new int[] { 1, 2, 3, 4 });
foreach (int item in arr)
{
Console.Write(string.Format("{0} ", item));
}
Console.WriteLine();
Console.WriteLine(Fold <int>(func4, new int[] { 1, 2, 3, 4, 5, 6, 7 }));
Console.ReadKey();
}
