Mar 22, 2021Dockerfile good practices for Node and NPMThe goal is to produce minimal image to keep the size low and reduce attack surface. Also we want to make the docker build process fast by removing unnecessary steps and using practices outlined below to leverage internal build cache. Besides pure Docker I’ll present docker-compose tool, which is a…Dockerfiles6 min read
Nov 18, 2020Kubernetes: basic resources and conceptsBelow are my notes while learning Kubernetes, but I thought those might be useful to other people that are just starting or just need a quick dictionary for K8s concepts and resources. Enjoy! Master Server Components Those master components make so called control plane. etcd — config store accessible to all cluster nodes …Kubernetes4 min read
Published in Level Up Coding·May 4, 2020OOP best practices that are anti-patterns in (functional) JavaScriptWhat is considered a good practice in Object-Oriented Programming (OOP) and Design Patterns, but is considered an anti-pattern in JavaScript (the functional programming (FP) flavor of JS at least)? Here are the main points: The good: factory pattern The bad: constructor The ugly: class Foo extends Bar For classic OOP…Object Oriented4 min read
Sep 17, 2019Communication patterns for people of various knowledge and experienceDreyfus model of skill acquisition provides hints for building effective communication - no matter if you want to delegate a task, ask for help, or just convey an idea. — Imagine that you’re an experienced software developer calling ISP technical support, because router is broken. How would you feel when they ask you if it’s plugged-in, if lights are blinking, or if you tried turning it off and on again? …Learning7 min read
Jan 30, 2019Wasted 10 years with BashTry Fish or ZSH — modern Bash alternatives that make shell more productive and cool. Do not waste time with Bash as I did. — When you’re thinking of shell on any Linux system you probably think Bash (Bourne Again Shell). On Windows too actually, as Git Bash is quite popular (despite it has got an ugly terminal emulator) and WSL (Windows Subsystem for Linux) uses Bash as well (by default). At least those have…Terminal4 min read
Jun 29, 2018Singleton with async constructor in JavaScriptSingleton is really easy to write, but it’s not so simple, especially in multi-threading environments. Sure, JavaScript is single-threaded by design, but not all concurrency daemons are slayed. Note: this is one of those posts leveraging Cunningham’s Law: the best way to get an answer is not to ask questions…Java Script3 min read
Dec 21, 2017Use JS object spread operator instead of Object.assign() pattern in Node 8One of the best features of Node 8.6+ is the ability to use rest/spread operator for objects. It’s still an ESNEXT stage 3, but it’s so useful already. Take a look at the snippet: const foo = { a:1, b:2, c: 3} const bar = { d:4, b:9 } const…Java Script2 min read
Nov 30, 2016How to involve a domain expert into modeling — visual and linguistic DDD techniquesIt is a review of JDD 2014 talk by Sławomir Sobótka originally published at Future Processing technical blog along with other talks reviews. The video recording (in Polish) is available on youtube. This talk was presented in Polish, its original title is „Jak wciągnąć eksperta domenowego w wir modelowania —…Domain Driven Design3 min read
Aug 22, 2016More #OpsEmpathy In Software DevelopmentAfter years of doing DevOps now I’m in situation where there are several operation teams to work with. — System administrator job is hard. They have to make sure everything works smooth all the time. That includes the complex legacy system that nobody fully understands. Such work is often invisible and goes unappreciated. Do The Dirty Work Yourself First For the last few days I’ve put myself into shoes of such operation person trying to…Docker2 min read
Jun 24, 2016Domain Driven Design makes you think about the businessHow we discovered big shift an auction platform has made at the DDD training. — At Domain Driven Design training we’ve been given an exercise to model domains of Allegro (more on what’s that later) and try to mark which ones belong to Core Domain. The modeling phase went quite smooth, but we’ve faced a problem when it came to choose Core Domain of the…Software Architecture2 min read
