istvano

What is new in the ES2021 edition of “JavaScript for impatient programmers”?

Free to read online: exploringjs.com/impatient-js/

The exercises now run as native ESM modules on Node.js. Previously, they were run via the esm package.
Material on new ES2021 features:
- String.prototype.replaceAll()
- Promise.any()
- Logical assignment operators
Underscores (_) as separators in number literals and bigint literals

Ingress MetalLB

Out of the box, the MicroK8s distribution of ingress-nginx installed as the MicroK8s addon ingress binds to ports 80+443 on the node's IP address using a hostPort, as we can see here:

microk8s kubectl -n ingress describe daemonset.apps/nginx-ingress-microk8s-controller
Name:           nginx-ingress-microk8s-controller
Selector:       name=nginx-ingress-microk8s

Installing a Debian VM with virt-install on KVM (libvirtd)

This turned out to be easier than I thought it would, especially after struggling with Ubuntu.

Both procedures use a common debian.env file to hold environment variables applied in the script.

When installing Debian always be sure to select an apt mirror when prompted, if you don't you'll regret it.

Environment variables

In a file, debian.env:

Moved to Shopify/graphql-design-tutorial

GNU Make Cheatsheet

Based on https://www.gnu.org/software/make/manual/html_node/Quick-Reference.html

Directives

Directive	Description
`define variable` `define variable =` `define variable :=` `define variable ::=` `define variable +=` `define variable ?=` `endef`	Define multi-line variables.
`undefine variable`	Undefining variables.

	FROM tiangolo/uvicorn-gunicorn-machine-learning:cuda9.1-python3.7
	ENV PORT 40003
	ENV APP_MODULE app.api:app
	ENV LOG_LEVEL debug
	ENV WEB_CONCURRENCY 2

	COPY ./requirements.txt ./requirements.txt
	RUN pip install --no-cache-dir --upgrade pip
	RUN pip install --no-cache-dir --upgrade torch transformers
	RUN pip install --no-cache-dir fastapi

	#!/bin/bash
	# by joevt Feb 6, 2024

	# Jan 22, 2023 - Updated to work in Mac OS X 10.4.
	# Jan 30, 2023 - Fixed the method options.
	# Apr 7, 2023 - Fixed parse of unknown prog-if and move temp files to separate tmp directory.
	# Feb 6, 2024 - Fix column alignment.

	#===================
	if [[ $EUID -ne 0 ]]; then

	Add the following in .zshrc:

	...
	plugins=(osx git zsh-autosuggestions zsh-syntax-highlighting zsh-nvm docker kubectl)
	...

	### Fix slowness of pastes with zsh-syntax-highlighting.zsh
	pasteinit() {
	OLD_SELF_INSERT=${${(s.:.)widgets[self-insert]}[2,3]}
	zle -N self-insert url-quote-magic # I wonder if you'd need `.url-quote-magic`?

	const publicPath = 'public';
	// Node os module
	// The os module provides a number of operating system-related utility methods.
	// It can be accessed using:
	const os = require('os');
	// Using a single monolithic configuration file impacts comprehension and
	// removes any potential for reusability.
	// As the needs of your project grow, you have to figure out the means to manage
	// webpack configuration more effectively.

	FROM node:8.1.2-onbuild as builder
	ARG TARGET=production
	RUN npm install @angular/cli
	RUN node_modules/.bin/ng build -aot --target ${TARGET}

	FROM nginx:1.13-alpine
	COPY nginx.conf /etc/nginx/conf.d/
	COPY --from=builder /usr/src/app/dist /usr/src/app