ondrej-kvasnovsky’s gists

ondrej-kvasnovsky / QuizGameMain.java

Created November 2, 2025 20:31

QuizGameMain.java

	void main() {
	IO.println("=== Java Knowledge Quiz ===\n");

	// FIVE parallel arrays
	String[] questions = {
	"What type stores decimal numbers?",
	"How do you get text from the user?",
	"What does ++ do to a variable?",
	"Which loop should be used if we don't how many times it would be executed?",
	"What method gets string length?",

ondrej-kvasnovsky / Mocker.java

Created January 10, 2024 04:25

Mocker

	package com.example;

	import java.lang.reflect.InvocationHandler;
	import java.lang.reflect.InvocationTargetException;
	import java.lang.reflect.Method;
	import java.lang.reflect.Proxy;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

ondrej-kvasnovsky / currencies.swift

Last active March 11, 2023 04:12

	import SwiftUI

	let identifiers = NSLocale.availableLocaleIdentifiers
	let locale = NSLocale(localeIdentifier: "en_US")

	let currencyFormatter = NumberFormatter()
	currencyFormatter.numberStyle = .currency
	currencyFormatter.usesGroupingSeparator = true
	currencyFormatter.maximumFractionDigits = 2

ondrej-kvasnovsky / HttpError.ts

Last active October 23, 2020 16:56

NodeJS proxy/gateway using routing-controllers & axios, checking role permissions using Secured annotation

	import { HttpError as HE } from 'routing-controllers';

	export class HttpError extends HE {

	constructor(httpCode: number, message?: string, readonly data?: any) {
	super(httpCode, message);
	Object.setPrototypeOf(this, HttpError.prototype);
	}

	toJSON() {

ondrej-kvasnovsky / cosineSimilarity.ts

Created September 14, 2020 21:40

Cosine Similarity

	function cosineSimilarity(a: number[], b: number[]) {
	let dotProduct = 0;
	let magnitudeA = 0;
	let magnitudeB = 0;
	for (let i = 0; i < a.length; i++) {
	dotProduct += (a[i] * b[i]);
	magnitudeA += (a[i] * a[i]);
	magnitudeB += (b[i] * b[i]);
	}
	magnitudeA = Math.sqrt(magnitudeA);

ondrej-kvasnovsky / groups.js

Created July 7, 2020 20:14

JavaScript get Regex groups

	const input = 'hi:ha:ho';
	const matches = input.match(/(.):(.):(.*)/);

	const firstGroup = matches[1];
	const secondGroup = matches[2];
	const thirdGroup = matches[3];

	console.log(firstGroup, secondGroup, thirdGroup);

	// prints out: hi ha ho

ondrej-kvasnovsky / encrypt.py

Created February 18, 2020 00:03

Encrypt string using NaCl in Python

	import base64

	payload = 'VKlNGb4mCR/5BBunW4d7jpwp/KI1pRcsW/DeuMzXThh+nz8HRMI54bmWLKjC3haJuBGZQmX/SfNIACU='
	payloadEncoded = payload.encode("UTF-8")
	payloadArray = base64.b64decode(payload)

	nonceArray = payloadArray[0:24]
	msgArray = payloadArray[24:len(payloadArray)]

	from nacl.secret import SecretBox

ondrej-kvasnovsky / gist:10213c32a50c2bcf8d6a3612adc0524e

Created November 26, 2019 02:47

How to test successful promise and rejected when a promis fails (async await)


	async function doSomething() {
	return 'some result'
	}

	async function doSomethingAndFail() {
	throw new Error()
	}

	describe('promise testing', () => {

ondrej-kvasnovsky / structjson.js

Created January 24, 2019 12:11

Struct to JSON in JavaScript

	/**
	* Copyright 2017, Google, Inc.
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,

ondrej-kvasnovsky / update.sh

Created December 28, 2018 17:23

Pull latest changes from all git repositories in a directory and call npm install for each project

	#!/bin/bash

	CUR_DIR=$(pwd)

	echo "\n\033[1mPulling in latest changes for all repositories in $CUR_DIR directory\033[0m\n"

	for i in $(find . -name ".git" \| cut -c 3-); do
	echo "";
	echo "\033[33m"+$i+"\033[0m";
	cd "$i";

Ondrej Kvasnovsky ondrej-kvasnovsky