C# LINQ：有没有一种方法可以向where子句提供具有多个参数的谓词

想知道是否有办法做到以下几点： 我基本上想为where子句提供一个谓词，其中包含多个参数，如下所示：

public bool Predicate (string a, object obj)
{
  // blah blah    
}

public void Test()
{
    var obj = "Object";
    var items = new string[]{"a", "b", "c"};
    var result = items.Where(Predicate); // here I want to somehow supply obj to Predicate as the second argument
}

---

你期待这样的事情吗

        public bool Predicate (string a, object obj)
        {
          // blah blah    
        }

        public void Test()
        {
            var obj = "Object";
            var items = new string[]{"a", "b", "c"};
            var result = items.Where(x => Predicate(x, obj)); // here I want to somehow supply obj to Predicate as the second argument
        }

---

您想要的操作称为“部分评估”；它在逻辑上与将一个双参数函数“转换”为两个单参数函数有关

static class Extensions
{
  static Func<A, R> PartiallyEvaluateRight<A, B, R>(this Func<A, B, R> f, B b)
  {
    return a => f(a, b);
  }
}
...
Func<int, int, bool> isGreater = (x, y) => x > y;
Func<int, bool> isGreaterThanTwo = isGreater.PartiallyEvaluateRight(2);

现在您可以创建一个工厂：

Func<int, int, bool> greaterThan = (x, y) => x > y;
Func<int, Func<int, bool>> factory = greaterThan.Curry();
Func<int, bool> withTwo = factory(2); // makes y => 2 > y

Func greaterThan=（x，y）=>x>y；
Func factory=greaterThan.Curry（）；
Func with two=工厂（2）；//使y=>2>y

---

清楚了吗？

这是一种方法。但是我期待C++中的BID2。将二元谓词转换为一元谓词

static class Extensions
{
  static Func<A, Func<B, R>> Curry<A, B, R>(this Func<A, B, R> f)
  {
    return a => b => f(a, b);
  }
}

Func<int, int, bool> greaterThan = (x, y) => x > y;
Func<int, Func<int, bool>> factory = greaterThan.Curry();
Func<int, bool> withTwo = factory(2); // makes y => 2 > y