Harsh Deep harsh183

title
Testing 101

So far you've been writing your programs amd running them time and time again doing that. A constant cycle of change-run-repeat until it works.

Which works fine until

you have hundreds of scenarios and inputs
the program takes quite long to run and it starts eating up too much time
you accidently break your program and don't even realize (billions lost, rockets dailing, people dying)

theme	marp
uncover	true

Find the only $x$, $y$, and $z$ positive integers

$$ x^3 = (z - y)^3 + 3yz(z - y)

	require 'pry'
	require 'rqrcode'

	qrcode = RQRCode::QRCode.new('https://cs125.cs.illinois.edu')

	png = qrcode.as_png(
	bit_depth: 1,
	border_modules: 4,
	color_mode: ChunkyPNG::COLOR_GRAYSCALE,
	color: 'black',

	# Simple script I put together showing mypy in action

	# standard type annotations - we can give arguments a type and expect a return type
	def add(x: int, y: int) -> int:
	return x + y

	print(add(1, 2))

	# we can let it pick within a list of types
	from typing import Union

	#!bin/bash

	# This script is for me creating my brain dumps that I usually do jumping right into it in vim.
	# I have a template file also defined that I can setup if I want.
	# This script also brings me back to the same context that I was in earlier

	set -ex

	cd ~/brain-dumps/

	// ==UserScript==
	// @name Download all RHTML links
	// @version 1
	// @grant none
	// ==/UserScript==

	// @for any page with annoying .rhtml links

	const all_links = Array.from(document.getElementsByTagName('a'));
	const rhtml_links = all_links.filter( link => link.href.endsWith("rhtml") )

	require 'sinatra'

	# Ex. http://localhost:4567/calc/add?x=1&y=2
	get '/calc/:operation' do
	operations = { 'add' => ->(x, y) {x + y},
	'sub' => ->(x, y) {x - y},
	'mul' => ->(x, y) {x * y},
	'div' => ->(x, y) {x / y},
	'mod' => ->(x, y) {x % y} }
	# Yes I could DRY that further but I don't trust user input

	class FibArray
	attr_accessor :array, :cache

	def initialize(array = [])
	@array = array
	@cache = [1, 2] # put precomputed results as needed
	generate_next_fib(array.size - cache.size)
	end

	def get(i)

	# This script goes into my Pictures/ folder and uploads it to ffsend.
	# Requires: jq

	set -e

	cd ~/Pictures # configure to other source of pictures if you want

	API_KEY="[YOUR KEY IT'S FREE TO GET]"
	FILE_NAME=$(ls -rt \| tail -n 1)
	IMAGE=$( base64 "$FILE_NAME" )