iOS Question How can I modify a Value of a Map

[Israel Gallegos]

I try modify a value in my map with function map.put, I set the key and the new value but not Works

I tried too Remove first the Key and after insert again

help me please

 

[hatzisn]

You do not show your entire code but it should be the immutable "bug" of maps in B4i (maybe objective C feature) which the only way to face it is to recreate the map. Copy all keys with values to a new map and set this to the given map. You can do this with a function where you send as argument your map and what the function returns you set it to the same map. Of course you will create the function which will return a map. This happens when you recreate map or list of maps from a JSON.

 

[TILogistic]

this does not work?

Public Sub TestMap
    Dim map1 As Map
    map1.Initialize
    
    'Add
    map1.Put("vchUUID", "New")
    Log(map1.As(JSON).ToString)
    
    'Update
'    map1.Remove("vchUUID")
    map1.Put("vchUUID", "Update")
    Log(map1.As(JSON).ToString)
    
End Sub

see:

B4i v7.50 has been released

I'm happy to release a new version of B4i. This update brings the recent IDE performance improvements, new language features and more. IDE performance - several cases where the typing speed became slow were fixed. The speed difference in those cases is significant. IIf - Inline If, also called...

www.b4x.com

 

[Israel Gallegos]

You do not show your entire code but it should be the immutable "bug" of maps in B4i (maybe objective C feature) which the only way to face it is to recreate the map. Copy all keys with values to a new map and set this to the given map. You can do this with a function where you send as argument your map and what the function returns you set it to the same map. Of course you will create the function which will return a map. This happens when you recreate map or list of maps from a JSON.

Thank`s

 

[Israel Gallegos]

this does not work?

Public Sub TestMap
    Dim map1 As Map
    map1.Initialize
   
    'Add
    map1.Put("vchUUID", "New")
    Log(map1.As(JSON).ToString)
   
    'Update
'    map1.Remove("vchUUID")
    map1.Put("vchUUID", "Update")
    Log(map1.As(JSON).ToString)
   
End Sub

see:

B4i v7.50 has been released

I'm happy to release a new version of B4i. This update brings the recent IDE performance improvements, new language features and more. IDE performance - several cases where the typing speed became slow were fixed. The speed difference in those cases is significant. IIf - Inline If, also called...

www.b4x.com

No I want to modify a map set before and after update only one a value of this same map, but not refresh


I Tried this:


'Update
' map1.Remove("vchUUID")
map1.Put("vchUUID", "Update")
Log(map1.As(JSON).ToString)

I had to create a new one map as told hatzisn

 

[TILogistic]

No I want to modify a map set before and after update only one a value of this same map, but not refresh


I Tried this:


'Update
' map1.Remove("vchUUID")
map1.Put("vchUUID", "Update")
Log(map1.As(JSON).ToString)

I had to create a new one map as told hatzisn

Thank you.

I needed to know if it allowed to add and update map elements directly.

On B4A and B4J, if you allow it, I have tried it.

I ask this because I have not used the latest versions of B4i and hope to use it in the near future.

regards.