This means that you can't call toInt () directly on value because it doesn't know that it contains a String at compile time, even though it does at runtime. For better interoperability, Kotlin extends its static type function with moderate and flow elements. The reason you must cast to a String first is because toInt () is an extension method on String, and value is of type Any. Moreover, it grants compile time among nullable and non-nullable types obtaining null safety. Thus, the class Any can also be referred to as the superclass. In Kotlin, the default return type of a function is Unit meaning that if you do not specify the return type of a function explicitly then the Kotlin compiler uses Unit as the return type.Kotlin also aids compilation platforms like JavaScript, Java Virtual Machine (JVM), and Native. It means that all classes in Kotlin inherit from a single class called Any which is at the root. When the return type of a function is Unit it means that the function does not return anything. Unit is the same thing as void in Java or C. Based on the above paragraph and the following definition, every class in Kotlin has methods equals, hashCode and toString. It’s the exact equivalent of Object in Java. This means if you follow the chain of parents of a class you will finally end up at Any. The Kotlin List.any() function checks if there is at least one element in the list, and returns a boolean value. This means Any is the parent class of any class you define in Kotlin. Gut 20 neue Features bringt die kommende Version der auf IntelliJ IDEA aufbauenden IDE für Android. The idea is to convert the array into a list and transform each element into a corresponding int value using the map() function. The negated counterpart of in Kotlin is which is used to compare if both the values are not equal to each other. It will only be true if both the objects or variables pointing to the same object. Every Kotlin class has Any as a superclass. operator is used to compare the reference of two variable or object. The official documentation of Any states:
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