每个符号重复多少次

Question

你能帮我编写一个计算LINQ的字符串吗？喜欢这个？

String text="aaabbcccdde"; 
Dictionary<int,char> result=....//LINQ 
foreach (var t in result) 
{ 
    Console.WriteLine("Symbol {0} is met {1} times",t.symbol,t.times); 
} 

Answer 1

你可以使用一个小的Linq：

var result = text.GroupBy(c => c) 
       .Select(g => new { symbol = g.Key, times = g.Count() }); 
foreach (var t in result) 
{ 
    Console.WriteLine("Symbol {0} is met {1} times",t.symbol,t.times); 
} 

或者更简单地说

var result = text.GroupBy(c => c, (c, g) => new { symbol = c, times = g.Count() }); 
foreach (var t in result) 
{ 
    Console.WriteLine("Symbol {0} is met {1} times",t.symbol,t.times); 
} 

Answer 2

String text = "aaabbcccdde"; 
foreach (var t in text.GroupBy(c => c)) 
{ 
    Console.WriteLine("Symbol {0} is met {1} times", t.Key, t.Count()); 
} 

哪里Key是被分组和Count()是次数炭出现Key。