Android Question Solution regarding comparison of objects in list

[maddy]

hey b4a community
'Type area(Areaname As String,Areanumber As Int)
dim l1 as list
Dim a As area
a.Initialize
l1.Initialize
l1.Add(a=add_area("Dnkl",90))
l1.Add(add_area("NMJ",89))
l1.Add(add_area("ASSS",900))


Log( l1.IndexOf(a))
I had created a function above and when i find indexof the area(custom type) i got index of -1
but when i find index using areaname only i got the proper index.So what the solution of finding proper index through the reference of object.

 

[Erel]

Please use [code]code here...[/code] tags when posting code.

 

[maddy]

hey b4a community

   Dim a As area
   a.Initialize
    l1.Initialize
    l1.Add(a=add_area("Dnkl",90))
    l1.Add(add_area("NMJ",89))
    l1.Add(add_area("ASSS",900))
     

    Log( l1.IndexOf(a))

I had created a function above and when i find indexof the area(custom type) i got index of -1
but when i find index using areaname only i got the proper index.So what the solution of finding proper index through the reference of object.

 

[Erel]

l1.Add(a=add_area("Dnkl",90))

This syntax is invalid.

This code will not work as the types are compared for reference equality. This means that two different type instances with the same values are considered different items.

You can use a Map that maps between the area id to the actual area item.

 

[maddy]

This syntax is invalid.

This code will not work as the types are compared for reference equality. This means that two different type instances with the same values are considered different items.

You can use a Map that maps between the area id to the actual area item.

Thanks for helping me out

 

[emexes]

Thanks for helping me out

Just in case it got lost in translation, but the answer is:

You can use a Map that maps between the area id to the actual area item.