Unexpected outcomes in linq.js

Question

Unexpected outcomes in linq.js

Hey there, I have a JSON object named "Faults" that looks like this:

"Faults":[{"RoomId":1,"ElementId":173,"FaultTypeId":1,"Count":1,"Remark":""},{"RoomId":3,"ElementId":211,"FaultTypeId":7,"Count":1,"Remark":""},{"RoomId":4,"ElementId":173,"FaultTypeId":1,"Count":1,"Remark":""}]

When I check the Faults object in the debugger, it shows up like this:

Now, my task is to determine if a room contains a Fault by using its RoomId. The code I'm currently using for this purpose is as follows:

    Enumerable.From(audit.Rooms).ForEach(function(room, index) {//&radic;
    var containsFaults = '';

    //room.Id always has a value and cannot be null
    var test1 = faults.Select("$.RoomId==" + room.Id).Count();
    var test2 = faults.Select("$.RoomId==" + room.Id);

    if (faults.Select("$.RoomId==" + room.Id).Count() > 0) {
        containsFaults = '√';
    }

However, when I run this code, the results are not as expected...

I'm puzzled why it's not returning the faults from my object with matching RoomId. The Id's definitely match. Can anyone point out what mistake I might be making here? I'm really stuck on this issue...

Appreciate any help you can provide!

javascript json linq.js

Answer 1

Answer №1

To respond to the inquiry

Why is it not displaying the faults from my object with the corresponding RoomId? I'm certain the Id's match. What am I missing here, I'm really struggling with this...

You must include .ToArray() to showcase the result.

var test2 = faults.Select("$.RoomId==" + room.Id).ToArray();
//                                               ^^^^^^^^^^

var audit = { Faults: [{ RoomId: 42, ElementId: 4711, FaultTypeId: 0, Count: 0, Remark: "no fault" }, { RoomId: 1, ElementId: 173, FaultTypeId: 1, Count: 1, Remark: "" }, { RoomId: 3, ElementId: 211, FaultTypeId: 7, Count: 1, Remark: "" }, { RoomId: 4, ElementId: 173, FaultTypeId: 1, Count: 1, Remark: "" }] },
    roomId = 4,
    dataset = Enumerable.From(audit.Faults),
    test1 = dataset.Where("$.Count > 0 && $.RoomId==" + roomId).Count();
    test2 = dataset.Where("$.Count > 0 && $.RoomId==" + roomId).ToArray();

console.log(test1);
console.log(test2);

<script src="https://cdnjs.cloudflare.com/ajax/libs/linq.js/2.2.0.2/linq.js"></script>

Answer 2

To respond to the inquiry

Why is it not displaying the faults from my object with the corresponding RoomId? I'm certain the Id's match. What am I missing here, I'm really struggling with this...

You must include .ToArray() to showcase the result.

var test2 = faults.Select("$.RoomId==" + room.Id).ToArray();
//                                               ^^^^^^^^^^

var audit = { Faults: [{ RoomId: 42, ElementId: 4711, FaultTypeId: 0, Count: 0, Remark: "no fault" }, { RoomId: 1, ElementId: 173, FaultTypeId: 1, Count: 1, Remark: "" }, { RoomId: 3, ElementId: 211, FaultTypeId: 7, Count: 1, Remark: "" }, { RoomId: 4, ElementId: 173, FaultTypeId: 1, Count: 1, Remark: "" }] },
    roomId = 4,
    dataset = Enumerable.From(audit.Faults),
    test1 = dataset.Where("$.Count > 0 && $.RoomId==" + roomId).Count();
    test2 = dataset.Where("$.Count > 0 && $.RoomId==" + roomId).ToArray();

console.log(test1);
console.log(test2);

<script src="https://cdnjs.cloudflare.com/ajax/libs/linq.js/2.2.0.2/linq.js"></script>

Unexpected outcomes in linq.js

Answer №1

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