要检查数组是否包含符合特定条件的元素,我们可以使用StartsWith()
C#中的方法-
using System; public class Demo { public static void Main(){ string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" }; Console.WriteLine("Products list..."); foreach(string s in products){ Console.WriteLine(s); } Console.WriteLine("\nOne or more products begin with the letter 'C'? = {0}", Array.Exists(products, ele => ele.StartsWith("C"))); Console.WriteLine("One or more planets begin with 'D'? = {0}", Array.Exists(products, ele => ele.StartsWith("D"))); Console.WriteLine("One or more products begin with the letter 'T'? = {0}", Array.Exists(products, ele => ele.StartsWith("T"))); Console.WriteLine("One or more planets begin with 'E'? = {0}", Array.Exists(products, ele => ele.StartsWith("E"))); } }
输出结果
这将产生以下输出-
Products list... Electronics Accessories Clothing Toys Clothing Furniture One or more products begin with the letter 'C'? = True One or more planets begin with 'D'? = False One or more products begin with the letter 'T'? = True One or more planets begin with 'E'? = True
让我们看另一个例子-
using System; public class Demo { public static void Main(){ string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" }; Console.WriteLine("Products list..."); foreach(string s in products){ Console.WriteLine(s); } Console.WriteLine("Is the products Accessories in the array? = {0}", Array.Exists(products, ele => ele == "Accessories")); Console.WriteLine("Is the products Stationery in the array? = {0}", Array.Exists(products, ele => ele == "Stationery")); Console.WriteLine("\nOne or more products begin with the letter 'C'? = {0}", Array.Exists(products, ele => ele.StartsWith("C"))); Console.WriteLine("One or more planets begin with 'D'? = {0}", Array.Exists(products, ele => ele.StartsWith("D"))); Console.WriteLine("One or more products begin with the letter 'T'? = {0}", Array.Exists(products, ele => ele.StartsWith("T"))); Console.WriteLine("One or more planets begin with 'E'? = {0}", Array.Exists(products, ele => ele.StartsWith("E"))); } }
输出结果
这将产生以下输出-
Products list... Electronics Accessories Clothing Toys Clothing Furniture Is the products Accessories in the array? = True Is the products Stationery in the array? = False One or more products begin with the letter 'C'? = True One or more planets begin with 'D'? = False One or more products begin with the letter 'T'? = True One or more planets begin with 'E'? = True