Rather efficient, if I do say so myself! Practice Makes Perfect! Print(message) Result of the second approach: the Kotlin compiler assigns a null value to the variable val anyObject: Any = "Hello, Kotlin students!" It will allow us to perform a safe cast thanks to the keyword as followed by a question mark ? in order to explicitly tell the Kotlin compiler that, if the conversion fails, it will have to assign a null value to our variable.
The second approach is more Kotlin-friendly. A Smart Conversion? private fun getDefaultSize(anyObject: Any): Int Result of the first approach: an error message is triggered I’m getting there! Let’s write the same method right away, but in Kotlin. The out Keyword – In Kotlin, we can use the out keyword on the generic type which means we can assign this reference to any of its supertypes.OK, I had figured that out all by myself! But what does this have to do with Kotlin and this chapter? Declaration-site variance(using in and out).Any is the supertype of all other datatypes. Invariance is the property by which a standard generic function/class already defined for a particular data type, cannot accept or return another datatype. This can be managed by the out and in keywords. By extension, generic types are invariant in Kotlin. Unlike Java, Kotlin makes arrays invariant by default. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.Python Backend Development with Django(Live).Android App Development with Kotlin(Live).Full Stack Development with React & Node JS(Live).Java Programming - Beginner to Advanced.Data Structure & Algorithm-Self Paced(C++/JAVA).Data Structures & Algorithms in JavaScript.Data Structure & Algorithm Classes (Live).
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