Android Question change the values of list

[Mehrzad238]

I already know that with this line we can change the values of list:

List.Set(Index, item)

let's say I have a few data that I have added by using Type, one of this type is a list of 0 that one of them is 1, which means that 1 is the chosen one, so I have made a changed one of this zeros to 1 and now I have two 1 in this type which it must be one of them, my question is how can I have only 1 on this type and not two or more?

for changing values I am using a series of checkbox/ radio button by using this link:

https://www.b4x.com/android/forum/threads/check-only-one-checkbox.106342/post-665665

 

[Erel]

List.Set is very rarely used.

I'm not sure that I understand the question. Post more code.

 

[Mehrzad238]

Sure I'm gonna send it tonight

 

[Mehrzad238]

I have a few issues with this. help me to fix that
and if there is a better way please show me and I will follow your lead

 

[Mehrzad238]

List.Set is very rarely used.

@Erel you said very rarely, can you show me an example of how you change the value of a LIST?

 

[Brian Dean]

I have downloaded your project and I have run it. It looks to me that it is working well. If you check a checkbox then it becomes checked and any previously checked box becomes unchecked. I imagine that this is what you want to do.

I would make a couple of comments, but they are not very important. Firstly, you probably know that if you use radio buttons then checking one will automatically uncheck all the others (in the same panel/view) without you needing to do anything. But if you want to allow all items to be unchecked (as your example does allow) then you need checkboxes. Secondly, I would use a List rather than a Map; in your example the map functionality is not used.

I think the Erel was just commenting that List.Set is not a common usage, not that there was anything wrong with it. You are not using List.Set in your example anyway, so why worry.

 

[Mehrzad238]

You are not using List. Set in your example anyway

@Brian Dean Are you sure that I'm not using List. Set in my example?
let me show you where:

itemlist.Set(Position,item)

this line code updates Type humans for this change item.boss=1

And most important things the subject of this thread is

change the values of list

not this:

It looks to me that it is working well. If you check a checkbox then it becomes checked and any previously checked box becomes unchecked. I imagine that this is what you want to do

you probably know that if you use radio buttons then checking one will automatically uncheck all the others (in the same panel/view) without you needing to do anything

I know this but I just want it to use checkbox

I would use a List rather than a Map; in your example the map functionality is not used

the boxes map is was for this example:
https://www.b4x.com/android/forum/threads/check-only-one-checkbox.106342/post-665665

and because of that only one check box will check and you have only one choice to make

if look take look at the log I put in my example is very clear what is happening and where is going wrong and needed to be fixed.

now if you have understood what I need to do, help me.
if you didn't don't change the subject of this thread

 

[Brian Dean]

There has been a mix-up somewhere, @Mehrzad238 . The project that you attached in post #4 (checkboxes.zip) is the example that you mention from the forum, with an additional Log statement that I assume you have added. It does not contain the line "itemlist.Set(Position,item)".

I cannot find your own project in any of the posts, but I will be happy to look at it if you wish.

 

[LucaMs]

    Dim lst As List
    lst.Initialize
    For i = 0 To 9
        lst.Add(i)
    Next
    logList(lst)
  
    lst.Set(2, 123)
    logList(lst)
  
  
  
Private Sub logList(lst As List)
    For Each v As Object In lst
        Log(v)
    Next
    Log("---------")
End Sub

0
1
2
3
4
5
6
7
8
9
---------
0
1
123
3
4
5
6
7
8
9
---------

 

[DonManfred]

And most important things the subject of this thread is

change the values of list

Please UPLOAD a small project which SHOWS the problem.

We can not help you if you hide all relevant code from us. Help us helping you.

Even if rarely used i expect the command mylist.Set to work.

 

[Mehrzad238]

thanks' @LucaMs but it wasn't what I was looking for.
For you @Brian Dean and @DonManfred I'm gonna give you an example to show you how this List.Set workes.
before you download and open the attached file you need to have Amir recycler view:

https://www.b4x.com/android/forum/threads/lib-chargeable-amir_recyclerview.97274/

I put a counting part on the example to just see how this List.Set workes it's not for this project

 

[Mehrzad238]

Well I found the solution:

Sub def_CheckedChange(Checked As Boolean)
    Dim c As CheckBox= Sender
    If c.Tag <> Null Then
        Dim arrayeh() = c.Tag As Object
        Dim Position = arrayeh(0) As Int
'        Dim boss = arrayeh(1) As Int
        Dim item = List.Get(Position) As office
        If Checked Then
            For Each box As CheckBox In boxes.Values
                If box <> c Then
                    box.Checked = False
                End If
            Next
            item.boss=1                    ' here we make new boss
            List.Set(Position,item)  'Here updates office type for new changes
        Else if Checked = False Then  'Here is the solution 
            item.boss=0                ' here we make new boss
            List.Set(Position,item)  'Here updates office type for new changes
        End If
    End If
End Sub

 

[Mahares]

now if you have understood what I need to do, help me.

Dude, the project you posted in post #4 has nothing to do with list. It is about map and checkboxes. Brian is correct. Instead of getting upset and blowing your top, you should apologize. Check it for yourself.

 

[Mehrzad238]

Hi, I just wanted to apologize to everyone that has been trying to help me with my problem and be grateful for all thing you have been done to me specifically @Brian Dean, you are was the first one who responds to me

 

[Brian Dean]

Thank you, @Mehrzad238 .

Don't worry - nobody makes much progress in life without making a few mistakes. But not everyone has the courage to appologise.

Its good to see you back.