如何检查列表是否包含符合C#中指定条件的元素？
要检查列表是否包含符合C#中指定条件的元素，代码如下-
示例
using System;
using System.Collections.Generic;
public class Demo {
private static bool demo(int i) {
return ((i % 3) == 0);
}
public static void Main(String[] args) {
List<int> list = new List<int>();
list.Add(255);
list.Add(315);
list.Add(410);
list.Add(500);
list.Add(600);
list.Add(710);
list.Add(800);
list.Add(1000);
Console.WriteLine("List elements...");
foreach (int i in list) {
Console.WriteLine(i);
}
Console.WriteLine("Does some elements match the predicate = "+list.Exists(demo));
}
}输出结果
这将产生以下输出-
List elements... 255 315 410 500 600 710 800 1000 Does some elements match the predicate = True
现在让我们来看另一个示例-
示例
using System;
using System.Collections.Generic;
public class Demo {
private static bool demo(int i) {
return ((i % 7) == 0);
}
public static void Main(String[] args) {
List<int> list = new List<int>();
list.Add(255);
list.Add(310);
list.Add(410);
list.Add(500);
list.Add(600);
Console.WriteLine("List elements...");
foreach (int i in list) {
Console.WriteLine(i);
}
Console.WriteLine("Does some elements match the predicate = "+list.Exists(demo));
}
}输出结果
这将产生以下输出-
List elements... 255 310 410 500 600 Does some elements match the predicate = False