jquery - javascript从数组中查找元素并从中删除一些元素

Question

我有一个如下所示的 JavaScript 数组:

var arr = [ {RoomId:1, RoomName: 'ABC'},
            {RoomId:1, RoomName: 'ABC'},
            {RoomId:1, RoomName: 'ABC'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
           ];

我的要求是这样的

1. 查找 RoomId 为 RoomId = 1 的特定房间。
2. 从中删除最后几个元素，就像删除 RoomId = 1 的最后 2 个元素一样。

所以我的最终数组将是这样的:

var arr = [ {RoomId:1, RoomName: 'ABC'},                
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
            {RoomId:2, RoomName: 'XYZ'},
          ];

Answer 1

您可以使用linq.js维持这种任务

像这样

Find particular room with RoomId say RoomId = 1.

代码

var data =Enumerable.From(arr).Where(function(x){return x.RoomId===1;}).ToArray();

Remove last few elements from it like remove last 2 elements with RoomId = 1.

var data =Enumerable.From(arr).Where(function(x){return x.RoomId===1;}).OrderByDescending(function(x){return x.RoomId;}).Skip(2);

arr=data.OrderBy(function(x){return x.RoomId;}).ToArray();