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你能幫我編寫一個計算LINQ的字符串嗎?喜歡這個?每個符號重複多少次
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);
}
你能幫我編寫一個計算LINQ的字符串嗎?喜歡這個?每個符號重複多少次
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);
}
你可以使用一個小的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);
}
或者更簡單地說
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);
}
String text = "aaabbcccdde";
foreach (var t in text.GroupBy(c => c))
{
Console.WriteLine("Symbol {0} is met {1} times", t.Key, t.Count());
}
哪裏Key
是被分組和Count()
是次數炭出現Key
。