Joining the world of blockchain

So, this blog post is simply a public “diary entry” announcing to the world that I’ve officially entered the world of blockchain. Now, this is late 2021 when I’m writing these lines. Blockchain itself started as early as 2009 (at least publicly – but definitely the idea was incepted from an even earlier point in […]

TypeScript Node.js testing tips

Situation 1 Use mocha in server-side TypeScript projects with compilerOptions.paths in tsconfig.json ? Then we need: mocha tsconfig-paths ts-node { “ts-node”: { “files”: true } } in the tsconfig.json file (see more here) Depending on how we import our modules around in the codebase, point (4) above may not always be needed. In one of […]

checkout another branch from a git repo that was cloned with –single-branch before

So you had a super large git repo, and you only wanted to checkout a single branch (e.g. to potentially save some disk space). You probably have gone with: Now that you’re done with that branch, you want to checkout another branch for your next task. Not having “the entire history”, git will yell sth […]

Start-Up (the Netflix show)

HEAVY SPOILER ALERT. PLEASE STOP READING IF YOU HAVEN’T WATCHED THE ENTIRE SERIES

k8s service externalIPs vs NodePort in GKE

I’ve seen discussions on this topic scattered around the internet, so the idea of this post is to gather them all (at least, the most useful of them – imho) into 1 single chart, so they can be easily understood from a bird eyes’ view. The illustration below shows how 2 types of service can […]

GIT_SSH_COMMAND

I have a number of git repos on remote systems (e.g. GitLab) where my laptop’s pub key is already registered for a certain other account not associated with the aforementioned git repos. Thus, I usually have to GIT_SSH_COMMAND=’ssh -i <path/to/some/private/key>’ git <command> so as to communicate with these repos under the correct identity. I might […]

adding deno completions on Mac Catalina

So, on Deno going 1.0, I decided to give it a try today. The getting-started doc explains clearly that we can use deno completions <shell> to generate completions definition for deno. But being new to zsh (the default shell on Mac Catalina), I didn’t know where best to install this completions definition to. So I […]

nginx proxying to unix sockets: lessons learned

I might classify this article under “rage post”, as it’s 4:30am and tomorrow’s early work prevents me from explaining things properly. Considering you have an nginx app proxying to /your/app.socket ; then the combination of the user and group and chmod value on the app.socket file itself & the directory containing it (in this example, […]

make a string url-safe

When running devops scripts (among other things), we often need to get a url-safe representation of an arbitrary string. This is commonly known as “url slug” by the average netizens. As my JavaScript is better than my bash, and npx is more universally available than my capability to master both Windows and Linux shell scripts, […]

Explain SPF like I’m 12

Say, you have just registered your own domain name: “myawesomedomain.com”, and a geek friend of yours says “hey pal, you’ll need to pay someone, or set up your own server, to send emails out from that awesome domain. Lemme do it for you!”