static void Main(string[] args)
{
PrmsFunc <int, int> F = Memoize <int, int>(SomeExpensiveOperation);
PrmsFunc <int, int> Lambda = prms => F(prms[0]) > F(prms[1]) ? F(prms[0]) : (F(prms[0]) < F(2 * prms[1]) ? F(2 * prms[1]) : F(prms[1]));
int[] lambdaParams = { 1, 5 };
double i = OptimizedCalculation(Lambda, lambdaParams);
Console.WriteLine($"Результат: {i}");
Console.ReadKey();
}
static PrmsFunc <TSourse, TResult> Memoize <TSourse, TResult>(PrmsFunc <TSourse, TResult> func)
{
Dictionary <string, TResult> cache = new Dictionary <string, TResult>();
return(args =>
{
var key = $"{ args.ToString() }:{ string.Join("|", args) }";
TResult result = default(TResult);
if (cache.ContainsKey(key))
{
result = cache[key];
}
else
{
result = cache[key] = func(args);
}
return result;
});
}
static TResult OptimizedCalculation <TSourse, TResult>(PrmsFunc <TSourse, TResult> lambda,
IEnumerable <TSourse> lambdaParams)
=> lambda(lambdaParams.ToArray());
