Kostas Minaidis kostasx

Assorted collection of engineering articles / blogs

that I bookmarked but never had enough time to read

Cheat sheet: JavaScript Array methods

Deriving a new Array from an existing Array:

['■','●','▲'].slice(1, 3)          ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
    ['▲','●'].map(x => x+x)        ⟼ ['▲▲','●●']
    ['▲','●'].flatMap(x => [x,x])  ⟼ ['▲','▲','●','●']

ZSH CheatSheet

This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.

Strings

Description	Syntax
Get the length of a string	`${#VARNAME}`
Get a single character	`${VARNAME[index]}`

Here is how to add Cypress E2E tests to a Create React App bootstrapped application. Assumes the *nix command line, you may need to adapt this for a Windows command line (or use WSL or Git Bash).

Install Cypress and the Testing Library utilities for it (to match the helpers CRA installs):
```
$ npm i {,@testing-library/}cypress
```
i is short for install, and the braces {} are expanded by brace expansion to cypress @testing-library/cypress.

repo -> repository
clone -> bring a repo down from the internet (remote repository like Github) to your local machine
add -> track your files and changes with Git
commit -> save your changes into Git
push -> push your changes to your remote repo on Github (or another website)
pull -> pull changes down from the remote repo to your local machine
status -> check to see which files are being tracked or need to be commited
init -> use this command inside of your project to turn it into a Git repository and start using Git with that codebase

Name	Latitude	Longitude	Cluster	Day
Athens International Airport	37.9356467	23.9484156	2	1
Acropolis of Athens	37.9715323	23.7257492	2	1
Pl. Agias Irinis 2	37.977418	23.7280221	2	1
Diporto - Secret underground restaurant	37.9806622	23.7257688	2	1
Temple of Zeus	37.9692838	23.7331012	2	1
Plaka	37.9725529	23.7303363999999	2	1
Temple of Olympian Zeus	37.9693	23.7331	2	1
Lake Vouliagmeni	37.8078002	23.7855018	2	1

	All programmers are API designers:
	Good programs are modular, and intermodular boundaries define APIs. Good modules get reused.

	APIs can be among your greatest assets or liabilities:
	Good APIs create long-term customers; bad ones create long-term support nightmares.

	Public APIs, like diamonds, are forever:
	You have one chance to get it right so give it your best.

	APIs should be easy to use and hard to misuse:

	name: hello-world
	on: push
	jobs:
	my-job:
	runs-on: ubuntu-latest
	steps:
	- name: my-step
	run: echo "Hello World!"

	rom tensorflow.keras.preprocessing.sequence import pad_sequences

	sentences = ['I love my dog',
	'I love my cat',
	'you love my dog!',
	'Do you think my dog is amazing?',
	]

	tokenizer = Tokenizer(num_words = 100,oov_token="<OOV>")
	tokenizer.fit_on_texts(sentences)

	/*
	Copy this into the console of any web page that is interactive and doesn't
	do hard reloads. You will hear your DOM changes as different pitches of
	audio.

	I have found this interesting for debugging, but also fun to hear web pages
	render like UIs do in movies.
	*/

	const audioCtx = new (window.AudioContext \|\| window.webkitAudioContext)()