Android Question Map class

[vinnythepooh71]

Hello , i have a problem, i need to know if an object returned by a map class is valid , for example :

Dim myClient as Client = Clients,Get("Ciccio")

if "Ciccio" is not in the map, what kind of result do i get ? how can perform an action based on this value ?

i come from c++ and using an stl class that would be trivial , but i couldn't find a good tutorial on the map class

 

[thedesolatesoul]

Its either null or "null"

 

[LucaMs]

Hello , i have a problem, i need to know if an object returned by a map class is valid , for example :

Dim myClient as Client = Clients,Get("Ciccio")

if "Ciccio" is not in the map, what kind of result do i get ? how can perform an action based on this value ?

i come from c++ and using an stl class that would be trivial , but i couldn't find a good tutorial on the map class

You could also use GetDefault:

 

[vinnythepooh71]

the syntax

if myClient!=null then
.
.
end if

doesn't work, the compiler signals me an error , can anyone post me a code fragmetn to see where i am worng in this example ?

 

[thedesolatesoul]

!= == <>

 

[vinnythepooh71]

The syntax

if ( myClient <> NUll )
..
..
end if

doesn't work, becasue myClient is an invalid reference and cannot be compared
i am trying GetDefault to see if i can manage to get it working

 

[LucaMs]

if "Ciccio" is not in the map

If Clients.ContainsKey("Ciccio") then

 

[vinnythepooh71]

Thanks Luca , it works, are you italian as well ?

 

[LucaMs]

Tu che dici?

 

[vinnythepooh71]

Penso di si