我需要將列表拆分成根據字符串屬性的第一個字符分組的多個列表。這是一個例子。將列表拆分成字母範圍
class Program
{
static void Main(string[] args)
{
var makes = new List<VehicleMake>
{
new VehicleMake {Name = "Acura"},
new VehicleMake {Name = "AMG"},
new VehicleMake {Name = "Audi"},
new VehicleMake {Name = "BMW"},
new VehicleMake {Name = "Chevrolet"},
new VehicleMake {Name = "Datsun"},
new VehicleMake {Name = "Eagle"},
new VehicleMake {Name = "Fiat"},
new VehicleMake {Name = "Honda"},
new VehicleMake {Name = "Infiniti"},
new VehicleMake {Name = "Jaguar"}
};
var balancedLists = makes.Balance(new List<BalancedListGroup>
{
new BalancedListGroup { RangeStart = 'A', RangeEnd = 'C'},
new BalancedListGroup { RangeStart = 'D', RangeEnd = 'F'},
new BalancedListGroup { RangeStart = 'G', RangeEnd = 'J'},
});
foreach (var balancedList in balancedLists)
{
foreach (var vehicleMake in balancedList)
{
Console.WriteLine(vehicleMake.Name);
}
Console.WriteLine("---");
}
Console.ReadLine();
}
}
public class VehicleMake
{
public string Name { get; set; }
}
public static class VehicleMakeListBalancer
{
public static List<List<VehicleMake>> Balance(this List<VehicleMake> list, List<BalancedListGroup> groups)
{
var letters =
new List<string> { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "y", "z" };
var balancedLists = new List<List<VehicleMake>>();
foreach (var group in groups)
{
var groupList = new List<VehicleMake>();
for (var i = letters.IndexOf(group.RangeStart.ToString().ToLower()); i <= letters.IndexOf(group.RangeEnd.ToString().ToLower()); i++)
{
groupList.AddRange(list.Where(l => l.Name.ToLower().StartsWith(letters[i].ToString())).ToList());
}
balancedLists.Add(groupList);
}
return balancedLists;
}
}
public class BalancedListGroup
{
public char RangeStart { get; set; }
public char RangeEnd { get; set; }
}
,輸出:
Acura
AMG
Audi
BMW
Chevrolet
---
Datsun
Eagle
Fiat
---
Honda
Infiniti
Jaguar
---
該算法的工作,但感覺很笨拙。有沒有更優雅的方式來做到這一點?
呃,當我開始寫這個算法時,我非常接近這個,除了我試圖在整個字符串上做這個,而不是第一個字符。儘管這是完美的。謝謝! – 2011-04-08 17:35:43