johnwahba

johnwahba / worker.mjs

Created December 23, 2023 02:27

worker pattern nodejs

	const CONCURRENCY = 5;
	function sleep(ms) {
	return new Promise(resolve => setTimeout(resolve, ms));
	}

	const doWork = async (work) => {
	const duration = Math.random() > 0.5 ? 1000 : 10000
	await sleep(duration)
	return console.log("doing work", work)
	}

johnwahba / leetcode_etl.rb

Last active October 6, 2023 01:22

Create an sqlite db of your leetcode visits and submissions to track progress

	# Script runs on mac. Would need to be adapted to run on windows.

	require 'sqlite3'
	require 'json'
	require 'zip'
	require 'tmpdir'
	require 'find'

	# Function to unzip the file
	def unzip_file(file, destination)

johnwahba / gist:12411559d01cff59168a

Created December 7, 2014 01:19

	<:Title>
	New Poll

	<:Body>
	<h1>New Poll</h1>
	<form>
	<h3>Question</h3>
	<input type="text" value="{{ page._todo._question }}">
	{{ page._todo._answers.each do \|answer\| }}
	<div><input type="text" value="{{ answer._text }}"></div>

johnwahba / gist:32b6d0599bbefa92d5d6

Last active August 29, 2015 14:08

	Alternating 2 opposite walls and 2 adjacent walls 4 times guarantees freedom for the subset of problems where half of the buttons are in each position.

	Then flip a random switch and the problem has been reduced to one that has already been solved.

johnwahba / frontend.html

Last active December 27, 2015 19:29

Everlane files

	<html>
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
	<body></body>
	<script src="frontend.js"></script>
	<script src="frontendDev.js"></script>
	</html>

johnwahba / ruby_cipher.rb

Created October 30, 2013 19:35

Cipher implementation ruby

	def rotx(x, string, encrypt=true)
	offset = encrypt ? x : -x
	uppers = Hash[("A".."Z").zip(("A".."Z").to_a.rotate(offset))]
	lowers = Hash[("a".."z").zip(("a".."z").to_a.rotate(offset))]
	dictionary = uppers.merge(lowers)
	output = ""
	string.length.times do \|idx\|
	char = string[idx]
	if dictionary[char]
	output += dictionary[char]

johnwahba / promise.js

Last active December 27, 2015 00:29

Basic promise implementation

	Promise = function(){
	this.result = undefined;
	this.complete = false
	this.failure = false;
	this.onFailure = [];
	this.onSuccess = [];
	};

	Promise.prototype.resolve = function(fnResult){
	if (this.complete){