hi there Im trying to understand why this `var externalId St

Question

hi there Im trying to understand why this `var externalId String = ` code provide to me this kind of object wrapping but when I`m trying to set this value in `data class Id var externalId String ` it actually tooks 16332 And I miss my reference I can t understand why this ref$ObjectRef appears Advice pls some documentation page about this

tateisu · Answer

is that propertie local variable that modified by lambda

arve · Answer

< mp> Did you mean `val` instead of `var`

mp · Answer

< tateisu> yeap wanna implement postponed update from lambda and yes its variable defined in other lambda as local var

mp · Answer

< arve> as I can see there is no big difference in val or var

arve · Answer

Could you share some more code context I don t quite understand exactly what you re trying to do slightly smiling face

tateisu · Answer

that lambda have to access reference of string to modifiy it then kotlin make its local var to object reference

tateisu · Answer

debugger shows its representation on JVM it may not equals to as defined by you

tateisu · Answer

simple local var that is used only in its scope it s representation on JVM is register it can t be accessed from outside of the method if access is required by such as lambda inner function etc kotlin make reference representation of local var and pass it to lambda inner function etc those have representation as another jvm method

mp · Answer

< arve> < tateisu> probably this will give a bit more understanding what I`m trying to do but still code is not very representable

mp · Answer

but as I understand < tateisu> gave related explanation already

mp · Answer

< tateisu> but its only read access because when I`m trying to store that reference it comes unwrapped and I can t modify it from lambda that I`ve showed before

mp · Answer

seems that I`m trying to implement very bad practice thing

tateisu · Answer

subUrl is property caller pass the class object instance to lambda no need to create reference variable

tateisu · Answer

simple local var that is used only in its scope it s representation on JVM is register it can t be accessed from outside of the method but object property has different situation

mp · Answer

I have cases when I will resolve suburl later inside lambda

tateisu · Answer

subUrl is property caller pass the class object instance to lambda no need to create reference variable

tateisu · Answer

Tools gt Kotlin gt Show Kotlin Bytecode to check what bytecode is generated

mp · Answer

< tateisu> I`m trying to change this subUrl later in lambda much later when specific instance of TestCases created

mp · Answer

here will be created 2 test cases and I though that I ll have ability to change suburl of second one with editing of externalId that I`ve allocate above

tateisu · Answer

I do not know what you want to avoid I think that it should be used as it is

tateisu · Answer

ObjectReference is jvm representation still it is string in kotlin syntax

mp · Answer

its ok I don t now also smiley smiley smiley still tnx