Kafka Landing a message As I've been working more with Kafka, I've realized that a large amount of the pain is related to the deserialization of data. So increasing our understanding of this piece of Kafka programming is a good use of time.
Git Git home One of the tools I use to stay out of git messes regularly is a git alias I call git home. It's nothing innovative, but I found myself typing the following four commands together a lot. It does save me some time.
Kotlin Choosing the right scope function For newcomers to Kotlin, the scope functions can be hard to wrap your head around. With similar sounding names (let, run, apply, also, with), choosing the right one can be difficult. What are the differences between them? When should we use them?
Kotlin Inline Functions Do you remember when you first started programming, and instead of breaking repeated code into a function, you copied and pasted it anywhere you needed? That's what the compiler does with an inline function.
Kafka The Role of Change Data Capture and Kafka Connect in Event Driven Architectures In normal architectures, data is trapped in the database. It is only accessible through API's. Normally that's best, because we only want people accessing data in the way we define. Except sometimes it's not.
Kotlin What do data classes give you? Data classes are a well-known feature in Kotlin. They're appropriately named, since it’s designed for classes that hold data—that’s where the main value of this feature come into play.
Kafka Kafka Hello World Apache Kafka is one of the most groundbreaking technologies we software developers get to work with these days. It’s used for streaming applications, as well as for piping data all throughout a system.
Kotlin Kotlin Algorithm Challenge #2 Given a string, find the length of the longest substring without repeating characters.
Kotlin Kotlin's Lambda Syntax Lambda functions are little chunks of code that can be passed around in functions [1]. They’re usually concise, single-minded, and anonymous. The main benefit is that they can be executed by the function we pass them into. This gives the language space for a lot of declarative, functional APIs.
Kotlin Kotlin Algorithm Challenge #1 You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.
Kafka Exactly Once In most messaging systems (RabbitMQ, for example) they deal in at-least once delivery. We (should) handle with this by making our systems process messages idempotently, or by de-duplicating.
Python Introduction To Celery Celery is a distributed task queue, which means it spreads work across a bunch of threads and machines. If you go through the work of defining tasks, you have a scalable entity (the workers) that you can use as a knob to scale with volume.
Node.js How the Node.js Event Loop Polls With Node.js, we can build lightning fast API's, just by using the built-in asynchronous API's. But how does it get that kind of performance? Or, more particularly, how does it manage the event queue?
Node.js Asynchronous I/O The fundamental insight of Node.js is two-fold. The first part is that I/O is the usually the slowest thing a server does. The second part is that threads corresponding to requests are wasteful, because they spend most of their life waiting.
Javascript Generators in JavaScript A code-driven explanation of generators—function that can pause execution.
Node.js Classes in JavaScript Classes in JavaScript are a construction from ES6. There are subtleties in them that you don't find in other languages, because JavaScript isn't like other languages—it does prototypal inheritance.
Node.js Modules in Node.js When programming in Node.js, it's important to understand the basics of the module system, such as scope, exports, and how that allows you to do some caching.
Data Structures Data Structures and Database Indexes A database index is an extra data structure in a storage engine w/ the goal of faster retrieval. It’s not the primary storing entity for the data, and it has to be maintained on writes.
Networking HTTP Persistent Connections This was always a point of confusion for me, so I imagine there are others out there who could use some clarification on this too.
Data Structures Git's DAG Git is my personal favorite application of a directed acyclic graph. Git, while incredibly powerful, can be confusing because it is abstract. You do need, to a certain extent, understand its internals.
Data Structures Gradle is a DAG Gradle is a build tool, and at its heart is a data structure we've been talking a lot about called a DAG. Why? What does it use it for?
Data Structures What is a topological ordering? Now that we're experts with directed acyclic graphs, we're going to dive into a related data structure that you can derive from a DAG.
Data Structures What is a DAG? A directed acyclic graph is one of the most important data structures we deal with in software engineering. You can't understand Git without grasping the main concepts of this data structure.
Kotlin Dijkstra’s Algorithm in Kotlin Dijkstra's algorithm is used to find the shortest path from one vertex to any other in a graph. It has ramifications to routing messages through a phone network or finding the best route for your daily commute.
