![]() ![]() Lets have a look at how to declare an ArrayList and then describe some important methods of the ArrayList class: We can initialize the collection like this: val array arrayListOf ( 1, 2, 3) Or we can use: val array mutableListOf ( 1, 2, 3) The ArrayList collection corresponds to. This also makes it more explicit from which layers the error came from. Array list is, in Kotlin, represented by the ArrayList class. ![]() ![]() Here we have defined a service function, that talks to the Persistence layer, and the Network layer.īoth layers have their own error hierarchy, and we would like to keep them separate, so we don’t have to create a single error hierarchy for all layers. val array arrayOf(1, 2, 3) val list listOf(1, 2, 3) val test1 listOf(array) // ok val test2 listOf(list) // error.
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