kotlin constructors

Kotlin is integrated with the Android SDK (KAD 05) and kotlinandroid By Antonio Leiva Time: Dec 19,201 6 Link: https://antonioleiva.com/kotlin-integrations-android-sdk/ Using the Kotlin language not only simplifies your code, but also simplifies calling Java code from Kotlin. How does this work? Using some common st

Use Kotlin to perform function operations on ViewGroup views. Original article title: Functional operations over Views in ViewGroup using Kotlin Link: http://antonioleiva.com/functional-operations-viewgroup-kotlin/ Antonio Leiva (http://antonioleiva.com/about) Original article published: Set, iteration, array, sequence... all these share a set of usefulFunctio

The Reified type of Kotlin: how to use this type (KAD 14) in the function, kotlinreified By Antonio Leiva Time: Mar 2 and 2017 Link: https://antonioleiva.com/reified-types-kotlin/ One of the most annoying restrictions for Java developers is that they cannot directly use types when using generics. The common solution is to pass classes in the form of function parameters, which makes the code more complex

optional when the return type can be inferred by the compiler.fun double(x:Int)=x*2Explicitly specifying the return typeWhen a function has a block of code, it must explicitly indicate the return type, which is not explicitly specified if it is returned to the unit. Kotlin cannot infer the return type when the function has a block of code, because there is a complex flow of control in the code, and the return type is not intuitive to the reader.Non-q

Kotlin is a new JVM-based language that can be seen as the extended language of Java, developed by JetBrains, who first saw him in the company's Android team when they saw them using the Kotlin to develop Android, suddenly feeling curious, and then slowly studied the prophecy.Why to develop and use the Kotlin language, the official saying is:Concise safeversatile

For Loop The For loop can traverse any object that provides an iterator (iterator), with the following syntax: Fun Main (args:array The loop body can be a block of code: Fun Main (args:array } As mentioned above, for can iterate through any object that provides an iterator.If you want to traverse an array or a list through an index , you can do this:Indices Fun Main (args:array Note that this "traverse over Interval" is compiled into an optimized implementation without creating additio

Article DirectoryScene"For" loopIteration MapSummary Scenario What is the difference between the "for" loop and the iteration map in Kotlin and the one we know in Java, and what are the better representations? "for" Loop Kotlin "for" Loop structure: for (I in a.. bA represents the starting value, and B represents the end value ... Represents the interval. For example (i in 1..100)Note: The interval is inclu

Kotlin Native, kotlinnative Kotlin Native is not a concept of Jni. It does not only need to interact with underlying Code such as C and C ++, but also needs to bypass the Jvm to directly compile the machine code for the system to run. That is to say, Kotlin is about to discard the Java crutches! In fact, when I first saw the Native name, I naturally thought of

Who said the interface cannot have code? -- Kotlin interface introduction (KAD 26), kotlinkad By Antonio Leiva Time: Jun 6, 2017 Link: https://antonioleiva.com/interfaces-kotlin/ Compared with Java, the Kotlin interface allows you to reuse more code. The reason is very simple:You can add code to your interface. If you have tried Java 8, this is very similar.

Google announced at this year's I/O developers conference that the Kotlin language should be used as the first-level programming language of Android development. Kotlin is developed by JetBrains, interoperable with Java 100%, and has many new features that Java does not yet support. So you know what Kotlin is? If you do not know that then hurriedly own Baidu. ab

We add an explicit constructor for the parent class and subclass, respectively, with the following code:Class Person{private int nAge;protected string StrName;Double douheight;public string Streatetype;The constructor of the parent classPublic person (){Console.WriteLine ("I am the constructor of the parent class");}public void Hello (){Console.WriteLine ("I can say hello! ");}public void Run (){Console.WriteLine ("I can run!" ");}}Class Student:person{private string strclass;private string stra

C + + generally create objects, copy or assign values in the form of constructors, copy constructors, assignment functions of these three methods. The following is a detailed comparison of the differences between the three and their specific implementation1. Constructor function A constructor is a special class member function that is called to initialize and allocate memory to the data members of a class w