codewars之C#0004

你可能知道Facebook和其他网页上的“喜欢”系统。人们可以“喜欢”博客文章，图片或其他项目。我们想要创建应该在这样的项目旁边显示的文本。

实现一个函数likes :: [String] -> String，它必须包含输入数组，包含喜欢项目的人的名字。它必须返回显示文本，如示例所示：

Kata.Likes(new string[0]) => "no one likes this" Kata.Likes(new string[] {"Peter"}) => "Peter likes this" Kata.Likes(new string[] {"Jacob", "Alex"}) => "Jacob and Alex like this" Kata.Likes(new string[] {"Max", "John", "Mark"}) => "Max, John and Mark like this" Kata.Likes(new string[] {"Alex", "Jacob", "Mark", "Max"}) => "Alex, Jacob and 2 others like this"

 

我的

using System; using System.Text; public static class Kata { public static string Likes(string[] name) { if (name.Length == 0) { return "no one likes this"; } StringBuilder MyStringBuilder = new StringBuilder(name[0], name.Length + 50); if (name.Length==0) { return "no one likes this"; } else if (name.Length == 1) { return MyStringBuilder.Append(" likes this").ToString(); } else if (name.Length == 2) { return MyStringBuilder.Append(" and ").Append(name[1]).Append(" like this").ToString(); //return name[0] + " and " + name[1] + like; } else if (name.Length == 3) { return MyStringBuilder.Append(", ").Append(name[1]).Append(" and ").Append(name[2]).Append(" like this").ToString(); // return name[0] +", "+name[1]+" and " + name[2] + like; } else { return MyStringBuilder.Append(", ").Append(name[1]).Append(" and ").Append((name.Length - 2).ToString()).Append(" others like this").ToString(); //return name[0] + ", " + name[1] + " and " + (name.Length-2)+" others " + like; } } }

其他方法1：

public static class Kata { public static string Likes(string[] names) { switch (names.Length) { case 0: return "no one likes this"; // :( case 1: return $"{names[0]} likes this"; case 2: return $"{names[0]} and {names[1]} like this"; case 3: return $"{names[0]}, {names[1]} and {names[2]} like this"; default: return $"{names[0]}, {names[1]} and {names.Length - 2} others like this"; } } }

其他方法二：

using System; public static class Kata { public static string Likes(string[] name) { switch (name.Length) { case 0: return "no one likes this"; case 1: return string.Format("{0} likes this",name[0]); case 2: return string.Format("{0} and {1} like this", name[0], name[1]); case 3: return string.Format("{0}, {1} and {2} like this", name[0], name[1], name[2]); default: return string.Format("{0}, {1} and {2} others like this", name[0], name[1], name.Length - 2); } } }

其他方法四：  

using System; public static class Kata { public static string Likes(string[] name) { return name.Length==0 ?"no one likes this":name.Length==1?$"{name[0]} likes this" :name.Length==2?$"{name[0]} and {name[1]} like this" :name.Length==3?$"{name[0]}, {name[1]} and {name[2]} like this" :$"{ name[0]}, {name[1]} and {name.Length-2} others like this"; } }