Published in Dev Genius·PinnedAndroid 104 : Do we really need Kotlin Coroutines?TLDR, Short answer, yes we do! What is not a kotlin coroutine? Coroutines are not threads or in any way lightweight threads, I have seen hazy analogies in various articles but it confuses more often than it helps. What are kotlin coroutines? Strictly speaking, coroutines are instances of suspendable computation, i.e…Kotlin Coroutines5 min readKotlin Coroutines5 min read
Published in Dev Genius·PinnedDesign 101 : What is the Simple Factory Pattern?The factory design pattern is based on the simple design principle that we must identify the portions of the code which are likely to change and encapsulate them so that changing the mutable portion of the code doesn’t require changes in other portions of the codebase. Wait! what does encapsulation…Design Patterns3 min readDesign Patterns3 min read
PinnedAndroid 101 : What does Dagger really generate behind the scenes 👀Why do we need to know what dagger generates, why can't we just use annotations and be happy with it? It looks magical to me and that's why I wanted to understand what really happens in the annotation processing step aka the code generation. For understanding this I will go…Dagger 23 min readDagger 23 min read
May 29, 2022Java-105: Java definitions which I often confuse!straightaway to the questions ! Is Java compiled vs Interpreted? JDK compiles java source code (*.java files) into bytecode (*.class files) and then finally interprets by JVM to machine code. Can't really put it in one category? What is JRE? JRE provides a Java class loader, class libraries, Java Virtual Machine (JVM), and GC . …Java2 min readJava2 min read
May 10, 2022Databases 101 : What are UUIDs? should we care?UUIDs/GUIDs are formally defined in RFC 4122. They’re Universally Unique IDentifiers, that can be generated without the use of a centralized authority. All UUIDs are 128 bits in length but are commonly represented with 32 hexadecimal characters. Some facts 1. Hex character can be represented in binary system using 4 bits…Uuid3 min readUuid3 min read
Apr 3, 2022Java 103 : Why do we need wildcards in java ?? is an unbounded wildcard in java. i.e it can hold anything that comes in its place, representing an unknown type. e.g let's take an example where there is a simple utility function that is only responsible for checking if the size of the given container is ≤ a given…Java5 min readJava5 min read
Published in Dev Genius·Mar 26, 2022Android 103 : How is constructor injection different from provides method in Dagger?In the first article, we explored how dagger generates factories for injected constructor dependencies, in this article we will explore more about the dagger-generated code when we use @Provides method instead of constructor injection for defining dependencies or bindings. As mentioned in the previous article, Dagger generates a factory for…Dagger 24 min readDagger 24 min read
Published in Geek Culture·Mar 13, 2022Android 102 : Why does dagger generate MembersInjector for us?We ended the previous article with a simple dependency injection example. now I want to make that a tad more complex by adding MembersInjector into the mix 😈! We introduced MembersInjector as something which helps us inject all dependencies in a class at once, instead of doing it separately for…Dagger3 min readDagger3 min read
Mar 12, 2022Java 102 : Do we really need Executor Service Abstraction ? Spoiler alert, Yes we do!In the previous article, we ran into the shortcomings of the simple runnable thread abstraction for implementing multithreaded code in java. We will explore the executor service abstraction from the concurrent package and see if it really solves our problems. Just for a reminder! The problem at hand was computing…Java4 min readJava4 min read
Feb 12, 2022Java 101 : What was Multithreading in old-school java like 👀?Why do we need to read about how multithreading was handled in old-java ? So that we might know what are the pain points that the Concurrent package solves! Let's take up a simple problem to understand this better, computing the sum of each row of a given 2D list…Java3 min readJava3 min read
