计算百分比法

Question

我有一个List<string>,随机从AF中的字符串.("A","D","B","A"等)

对于AF,我想知道总数的百分比.

我在视觉工作室C#,WinForms工作,谢谢.

Answer 1

var groups = strings.ToLookup(str => str); 
var percentages = groups.Select(group => 
  new { Str = group.Key, Pct = (group.Count() * 100 / strings.Count)});