![]() ![]() While I might personally prefer sticking with null-safe calls and elvis operators, it sounds like you'd prefer cleaner code at the call site (especially considering you know these keys exist and have associated non-null values). For instance, the Int type can hold non-null 32-bit integers. In this article, we’ll discuss each of these ways. These include Kotlin Reflection, Jackson, Gson, and Kotlin Serialization. There are several built-in or 3rd party libraries that can help us with this. As always, you do not need any imports to use lists and other collections in Kotlin.MapOf() is providing a Map with no guarantees for the presence of a key- something which is kind of expected especially considering the Java implementation of Map. Each type in Kotlin has one nullable form and another non-nullable form. When working with data classes in Kotlin, there’s sometimes a need to convert a data class object to a Map. You can explicitly specify a type as nullable using the symbol: var nullableString: String 'Hello' nullableString. Consider the case where you have a LiveData containing a user id. Kotlin’s type system is designed to eliminate null reference exceptions. ![]() The given function func will be executed on the main thread. As a hint, you will need to use an indexed for loop to solve this problem. If the given function returns null, then swLiveData is not 'backed' by any other LiveData. ![]() For example, given the first list, you would return true. Supports named parameters, object mocks, coroutines and extension function mocking. List All Larger Write a method listAllLarger that, given two non-null lists of Int values, returns true if all the values in the first list are strictly greater than values in the second list at the same position. As always, you do not need any imports to use maps and other collections in Kotlin. Return true if map has mappings for both passed Ints, and if they map to equal values. Map Same Value (Integer to String) Write a method named mapSameValue that accepts three arguments: a non-null map from Integers to Strings, and two Int values. ![]()
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