多条件排序（C# and Lua）

C#

升序排序	OrderBy	按升序对序列的元素进行排序
	ThenBy	按升序对序列中的元素执行后续排序
降序排序	OrderByDescending	按降序对序列的元素排序
	ThenByDescending	按降序对序列中的元素执行后续排序

public class Fruit
{public int id;public string name;public float price;public float weight;
}List<Fruit> list = new List<Fruit>();
list.Add(new Fruit { id = 2, name = "苹果", price = 9.9f ,weight = 500});
list.Add(new Fruit { id = 5, name = "西瓜", price = 1.2f, weight = 5000 });
list.Add(new Fruit { id = 1, name = "草莓", price = 29.9f, weight = 80 });
list.Add(new Fruit { id = 3, name = "香蕉", price = 6f, weight = 800 });
list.Add(new Fruit { id = 4, name = "哈密瓜", price = 2.5f, weight = 3000 });

升序排序

IOrderedEnumerable<Fruit> result = list.OrderBy(x => x.id).ThenBy(x=>x.price).ThenBy(x=>x.weight);

降序排序

IOrderedEnumerable<Fruit> result = list.OrderByDescending(x => x.id).ThenByDescending(x=>x.price).ThenByDescending(x=>x.weight);

Lua

local list = {[1] = {id = 101,name = "小明",age = 16,score = 88};[2] = {id = 103,name = "小红",age = 15,score = 91};[3] = {id = 107,name = "小刚",age = 16,score = 81};[4] = {id = 105,name = "小丽",age = 15,score = 91};[5] = {id = 104,name = "小龙",age = 14,score = 88};
}table.sort(list,function(a,b)if a.score == b.score thenif a.age == b.age thenreturn a.id > b.idelsereturn a.age > b.ageend  elsereturn a.score > b.scoreend  end)