programming

A collection of 31 posts

debugging

git list previous branch

In git, how do I go back to the previous branch I was just on? I've got a memory of a fish and easily forget which branch I was on previously- how do I switch back? Also, is it true fish have short memories and what if they're drunk? An

programming

How can I create a minimal NodeJS script. mjs? What's that?

TIL .mjs is a thing, since when? When running my script (e.g. node myscript.js ) I see the error "SyntaxError: Cannot use import statement outside a module", why? I write a lot of Python, and I'm used to (like in bash) writing quick little scripts to perform a task,

thinking fast and slow

Engineering Principles & Values

A work in progress. (started ~2022 and sat in draft state for far to long) so I've decided to publish and intend to revisit. Empathy for learning Code is never the challenge. Well-rested comfortable people who feel emotionally safe have solved every problem I’ve put in front of them.

programming

FastHTML getting started & comparison with Flask

FastHTML is built on-top of the popular python libraries starlette, and uvicorn. FastHTML introduces Python types for common HTML elements integrated with HTMX which means you don't need to write html templates directly, and save a lot of time (in theory). It's like traditional HTML, meets stronger typing, meets niche

debugging

Deleting files "Cannot be removed because it is not empty" Error (Solved)

Struggling to delete a persistent file? We were facing the same problem! In our case, we encountered this issue while working with WSL (Windows Subsystem for Linux) and Python and we wanted to delete a folder. If you're here just for the solution, here's what you can do: Step 1:

open source

A practical, detailed guide to Git branching strategy, issue creation and merging

Question: I would like to ask for an explanation about git best practices. Like git branching, naming branches etc Sidenote- why does all this matter & why should I care about issues, git and branching? Have you ever.. * Not had enough information about an issue/bug? * Struggled to find a link

Sysadmin

How do I login ssh to an IPv6 server from an IPv4 internet connection?

Goals * Not everybody has an IPv6 address (see IPv6 adoption per country): * Given a valid account (ssh), allow a user on an IPv4 connection ssh to an IPv6 server running on an IPv6 host. Let's get tunnelling! * Critical goals: To the user, they should still be able to simply ssh

thinking fast and slow

The Evolution Of Website Builders

The header of this article is Lego.com from Nov 9th 1996. It gives some context for how far the web has come. It started with find & replace We literally used to have to hand write a html file for every page. There was no concept of 'templating'. Hunderds if

programming

What is concurrent code?

Concurrent computing - WikipediaWikimedia Foundation, Inc.Contributors to Wikimedia projects Concurrent computing is a form of computing in which several computations are executed concurrently—during overlapping time periods—instead of sequentially—with one completing before the next starts. - Wikipedia Related topics: * Dining philosophers problem

Sysadmin

How to set ulimit max number open files and other limits? Help!

> You can use this reference to learn how to update any of the kernel / userspace limits. Increase max number of open files nofile ubuntu (and other os's) > Fun fact: fs.file-max is probably not what you want to change, you probably want to change ulimit. But why? The deault fs.

programming

How to create your own pip package example python

Example code repo for post [https://github.com/KarmaComputing/create-your-own-python-pip-package] Being able to package your python project into a pip package is useful for distribution, and sharing with others especially if the code is generic enough to be useful in other projects). This repo is base on the tutorial: from

programming

Rust create ubuntu / debian package from cargo

Rust how to create a deb package with cargo deb

programming

How to get started with rust

How to I install rust? See https://www.rust-lang.org/tools/install Or run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh How do I compile a rust program? Use rustc E.g. rustc main.rs The output is a binary main. Where does rust/cargo

programming

What is an unhandled exception mean?

Generally an unhandled exception in your code means that your program is in a condition or state that you have not described to the computer how to handle that situation. What does "node --unhandled-rejections=strict" mean? E.g. node --unhandled-rejections=strict main.js Sure good question!   Focus on the word

programming

Playwright tutorial example configuration

Playwright provides a fast and reliable interface that can be used to automate browser navigation testing. In this Playwirght tutorial, we are going to use it to do some simple automated test and errors you might experience in the process.   See the following Github repository: GitHub - KarmaComputing/playwright-testingContribute to

open source

Does git rm delete the file?

tldr; Yes. Yes it does. (use git restore --staged to un-delete if you made that mistake*) Does git rm remove the file? How to find out yourself: See man git rm or read on. Sometimes you find git is tracking files (e.g. binary files like images) which you shouldn't

open source

Database migrations with multiple git branches and teams alembic sqlalchemy

> This article is suitable for understanding database migrations when there are database migrations on different git branches which need to be merged. The examples are python's alembic [https://alembic.sqlalchemy.org/en/latest/] project but the concept is useful for all When doing branch based development (e.g. issue branches)

programming

Getting started with Java and Scala projects using Maven, intellij

Coming from a Python/Php and/or systm administration bacground with no little to Java experience is daunting. * POM? What is that? (Is this like setuptools?) Not really, but sort of * Maven? What is it? * How do I even run this thing? * What's a war file? * Why can't I just

programming

How to build and publish a package on pypi.org

Notes for building and publising a python package to pypi.org These notes are for python 2.7, sorry, but they still may be useful for python 3.x. Build it python setup.py bdist_wheel Upload your package to pypi twine upload dist/* Upgrage your system to the latest

reality

Do Programmers Need Math?

Do Programmers Need Math? No. I'm writing this article after quite a few years of programming. No, I'm not an expert by any means nor do I profess to be however I do run a company which sells computing services and we do software development as part of that process.

programming

Angular 6 Dynamically Add Rows Reactive Forms How To

For this we'll create an example form which allows an admin user to add multiple selling points (rows) to a product to demonstrate dynamicaly adding multiple form inputs to a form. It starts simple, but once you've got the core concepts of it it's easyier to create more complex (such

programming

Magento 2 Enterprise Upgrade How To

This article is for both developers and business decision makers. Migrating and upgrading from Magento 1 to Magento 2 is a big task but planned well; it can go smoothly. Bare in mind that the upgrade from Magento 1 to Magento 2 is a completly new approach. It's not too

open source

How to make an Angular 6 material design cdk & pwa app

Step 1: Get excited about new shiny things By reading this: https://blog.angular.io/version-6-of-angular-now-available-cc56b0efa7a4 If you need help setting up an ssl certificate, read our guide How to set-up .app domains with ssl and apache. This guide goes over how to build & deploy an Angular 6 app using

programming

How to set-up .app domains with ssl and apache

Get a new shiny .app domain name Google sells .app domains, and many other registrars. The key thing with .app domains is they must be served over https for browsers to load it. This means you must set-up an ssl certificate. Add an A record pointing to your web server

programming

Flask get server host

How to get Flask server host address? The flask python app host can be accessed (during a request) by running: flask.request.host # Or the full url: flask.request.host_url For more info read about app_context on the official Flask docs. But wait, did you know you can