如何檢查是否有在數組

Question

說多個相同的價值觀我有具有以下值

ABAABC

數組如何運行，這將增加該整數變量代碼， b和c根據它們發生在陣列

Answer 1

看一下例子在https://msdn.microsoft.com/en-us/library/vstudio/bb535181%28v=vs.100%29.aspx

，它基本上是你所需要的底部的時間量。

var array = new string[] {"A", "B", "A", "A", "B", "C" }; 
int a = array.Count(p => p == "A"); 

Answer 2

您可以使用GroupBy：

var array = new string[] {"A", "B", "A", "A", "B", "C" }; 

var counts = array 
    .GroupBy(letter => letter) 
    .Select(g => new { Letter = g.Key, Count = g.Count() }); 

如果你想獲得單獨計數，你可以把一切都變成字典

var countsDictionary = array 
    .GroupBy(letter => letter) 
    .ToDictionary(g => g.Key, g => g.Count()); 

var aCount = countsDictionary["A"]; 
var bCount = countsDictionary["B"]; 
//etc...