In the next chapters, we get to know the multi-paradigm nature of Kotlin which allows us to create powerful abstractions by combining various aspects of functional and object-oriented programming. The book starts with an introduction to the language and its ecosystem, which will give you an understanding of the key ideas behind the Kotlin design, introduce you to the Kotlin tooling and present you the basic language syntax and constructs. Although our primary focus is on JVM and Android, the knowledge we’re sharing here, to various extents, applies to other Kotlin-supported platforms such as JavaScript, native and even multi-platform applications. When this option is enabled, you can write and execute code line by line, and only the new code will be executed with each new run.The purpose of this book is to guide a reader through the capabilities of Kotlin language and give examples of how to use it for the development of various applications, be it desktop, mobile or Web. Use REPL: executes the script incrementally. Interactive mode: runs the code each time you stop typing. Use classpath of module (only applicable for scratches): specifies the module with your custom classes if you want to use them in a scratch. The following options are available for running Kotlin scratches and worksheets:
In the top-left corner of the editor, click or press Ctrl+Alt+W. Give the worksheet a name and press Enter.
In the Project tool window, right-click the directory in which you want to create a worksheet and select New | Kotlin worksheet. This lets you use project-specific classes without any configuration, but ties a worksheet to a project.įrom the main menu, select File | New | Scratch File or press Ctrl+Alt+Shift+Insert, then select Kotlin. They can be accessed from any project, but you have to specify where to look for the classes in case you are using project-specific classes. The difference between scratches and worksheets is that: This is useful for testing and prototyping purposes. Scratches and worksheets allow you to create a temporary file and execute it straight away.
Users/me.user/Users/me.user/IdeaProjects Res3: ! = /Users/me.userįiles.walk(res3, 1).forEach
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