From Extension Lambdas to expressive Kotlin DSLs

Extension functions, and Lambdas and even Extension Lambdas have both been discussed already (and are assumed knowledge for this page).  But the uses of lambdas goes beyond just functionality, and into the realm of expressive code.  Expressive code is about having the code represent the ideas behind the code more clearly, allowing better reading of the… Continue reading From Extension Lambdas to expressive Kotlin DSLs

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Closures, callbacks, Lambdas and Lambda parameters

Introduction. Previous pages have introduced the concept of lambdas and closures, and explained how the concept of the closure relates to methods, static and class methods in both python and kotlin.  This page builds on the concept of lambdas and closures, and provides more details on the workings in kotlin, and how this differs from… Continue reading Closures, callbacks, Lambdas and Lambda parameters

Gradle Kotlin DSL 1.0: Basic App Build

Contents: Kotlin DSL list of other pagesBuild Basics in Gradle Plugins Dependencies and Artifact Repositories A Simple Practical ExampleVarying the Source Locations: SourceSetsApplicationTesting - JUnitlocal jars as dependencies Build Basics with Gradle. The build file prepares a configuration for gradle and for any optional extra build tools.  The basic configuration for a build requires: what… Continue reading Gradle Kotlin DSL 1.0: Basic App Build

Interfaces, Delegation & Composition vs Multiple Inheritance & Duck Typing

Kotlin has Interface, Abstract Classes and Delegation, while Python has multiple inheritance. Different tools, same problems.  The different tools reflect an evolution of what Object Oriented best summed up by: Composition over inheritance. The rethink, the new concepts and how to use them are explained here. Abstract Classes Interfaces:  Duck Typing with Safety Multiple Interfaces… Continue reading Interfaces, Delegation & Composition vs Multiple Inheritance & Duck Typing

Language Popularity?

Support for a language is dependant on the popularity of that language.  But how do you measure popularity? Is it the most liked, must used simply most discussed?  If  Hitler may be the most discussed person from world war II, then consider that by some measures, that would make Hitler the most popular? What is… Continue reading Language Popularity?

Closures, methods, static methods, class methods

Everything you ever wondered about closures, and a few things more: Closures: just what are closures? Closures as code, packaged with parameters Methods as closures: Python Methods as closures: Kotlin Static Methods class level methods/companion object methods Closures: just what are closures? Lets start with an example, and then discuss how it works. The function… Continue reading Closures, methods, static methods, class methods

OOP: Using Kotlin to improve OOP Skills

Ok, Object Oriented Programming (OOP)is not exactly new, and there are lots of pages on OOP on the web.  This page comes from a background of both Python and Kotlin, and how improved programming styles offered by Kotlin can change how you program.  Although Kotlin automates newer techniques and provides assistance coding, you can 'backport'… Continue reading OOP: Using Kotlin to improve OOP Skills