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Hey guys i need a quick help here I have a model and i want to access the items outside a for loop ...
# android
k
Hey guys i need a quick help here I have a model and i want to access the items outside a for loop
Copy code
var model:User()
forEachIndexed { index, users ->{
println("my $users ")
}
println("I want to access my result outside for loop")
e
What kind of result do you want?
k
i want to get back the model result which match with like 
println("Result $model")
... Not an arraylist
e
Then what object does you actually looping?
k
Am looping into this arraylist 
val arraylist = ArrayList<User>()
Example
Copy code
val arraylist = ArrayList<User>()
var model:User()
forEachIndexed { index, users ->{
println("my $users ")
}
println("Result $model")
e
I think you should be calling 
arraylist.forEachIndexed
?
k
but i want the model
e
And if you are looping the 
ArrayList<User>
, then you can use 
filter{}
to get the matches, or even 
first {}
if you just need one result
k
i actually calling 
arraylist.forEachIndexed
Copy code
val arraylist = ArrayList<User>()
var model:User()
arraylist.forEachIndexed { index, users ->{
println("my $users ")
} 
println("Result $model")
where i need help is to access that model ... which is not an arraylist model just a model like above
e
If I didn't get it wrong, you want to set 
var model
to the first one that matches some condition inside the 
val arraylist
?
k
i want to access all the result after looping the array as 
var model
which i declare up ...
to give u more clarity i have a `fun which i need to pass that 
model
it cannot be an 
array
e
Can't you just call that 
fun
inside the loop?
k
no it will keep looping all the values
e
If you don't want to call that 
fun
for every 
User
in the list, then use 
filter
to get rid of the unwanted 
User
first, then 
map
each 
User
to the result of that 
fun
k
i will just pass my 
fun
inside a 
for
cz filtering is not helping
Am i doing it right like this
Copy code
var getuser:List<User> = arralist.filter { user -> User ==User() }

            println("FILTER 909 $getuser")
            getuser.map { dataModel ->
                log("DADADADADDAAD $dataModel")
            }
e
Copy code
fun action(user: User): T = ...
val arraylist: ArrayList<User>
arraylist.filter { user -> user == ... }.map { action(it) }
If 
action()
does not return a value, replace the 
.map
with 
.forEach
k
when filtering can i replace all the model ? like 
arraylist.filter { user -> user == User() }.map
e
Oh then you should do 
.map { User() }
k
``` arraylist.filter { user -> user == User()}.map {User() println("DDDD ----------- $it") }``that line ain't executed
e
Cause nothing matches 
user == User()
filter
is not meant for manipulating data
k
how tp get something which matches ?
e
Don't understand what you want to ask
To clarify the problem, you have a 
ArrayList<User>
, and you want to pass some of them into a function 
fun action(user: User): Result
, and gather all the results. Am I getting it wrong, or you want to actually manipulate the 
ArrayList<User>
?
k
u are getting it right
it like that .. from my 
ArrayList<User>
i want to access the model by looping
e
Then its simple as just 
users.filter { boolean condition }.map { user -> getResult(user) }
This will gives you back 
List<Result>
which you can then operate on
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