wasm rust snake
Rust Wasm performance on snake game example
Lets measure performance of Rust in WASM snake game. We checking limits of performance and compare it with JS version.
Daniel Gustaw
• 15 min read
machine-learning python numpy
Activation Functions in Machine Learning
We study various activation functions, their characteristics, and their impact on the performance of machine learning models.
Daniel Gustaw
• 14 min read
machine-learning python numpy
Machine Learning XOR from Scratch
Introduction to machine learning using the XOR problem as an example. In this article, we present how to create a model from scratch using Python and NumPy.
Daniel Gustaw
• 16 min read
langchain openai rag
LangChain Exemplary Use Cases
Extracting structured data from PDF invoices and building a flexible document search system with LangChain and FAISS.
Daniel Gustaw
• 7 min read
typescript fastify prisma
Fastify Prisma REST backend
Typescript template for Fastify REST API with Prisma and JWT authentication.
Daniel Gustaw
• 7 min read
web push notifications
Web Push Notifications
Web push notification written in raw JavaScript without any libraries.
Daniel Gustaw
• 2 min read
svelte snake deno
Svelte snake deployed on deno
Svelte Snake is a simple game written in Svelte. It's deployed on Deno, a secure runtime for JavaScript and TypeScript.
Daniel Gustaw
• 9 min read
json rfc rust
Rust implementation of RFC 7396 - JSON Merge Patch
Rust's speed and reliability make it ideal for implementing JSON Merge Patch, as defined in RFC 7396. This specification enables efficient and safe partial updates to JSON documents.
Daniel Gustaw
• 10 min read
esm cjs typescript
Tutorial for ESM + CommonJS package creators
There is intense debate in the JS community on dropping CommonJS or using dual packages. I've curated key links and written a tutorial for dual package publishing.
Daniel Gustaw
• 7 min read
linux arch docker
How to Install Yay on a Pure Arch Linux Docker Image
Yay installation require few steps like user creation, base-devel and git installation, change in /etc/sudousers, cloning yay repo and makepkg on it. This posts covering this process steps by steps.
Daniel Gustaw
• 3 min read
gpt rust cli
Simplifying Linux Command Line with GPT-CLI (rust, open source)
Run linux commands with natural language. Eg.: 'show my graphic card' instead 'lspci | grep VGA', open source project written in rust
Daniel Gustaw
• 4 min read
trpc websocket authorization
tRPC - super fast development cycle for fullstack typescript apps
We building tRPC client and server with query, mutation, authentication and subscriptions. Authentication for websocket can be tricky and it is in this case so there are presented three approaches to solve this problem.
Daniel Gustaw
• 15 min read
mongodb fedora linux
How to install MongoDB 6 on Fedora 37
Mongodb 6 installation on Fedora Linux 37. Article shows lacking fragment of official docs and two steps after installation that are presented in extremely simple way in comparison to other sources.
Daniel Gustaw
• 2 min read
quicksort rust google
QuickSort implementation in Rust, Typescript and Go
Master QuickSort with our in-depth guide and implementation examples in three popular programming languages, and sort large datasets quickly and efficiently.
Daniel Gustaw
• 5 min read
queue nodejs
ZeroMQ pull-push pattern for Node JS
The article emphasizes ZeroMQ's flexibility for messaging in Node.js, highlighting the pull-push pattern ideal for high-volume distributed systems.
Daniel Gustaw
• 3 min read
google
New Google Identity in Nuxt 3
New Google Identity installation for Nuxt 3 with credentials verification in fastify.
Daniel Gustaw
• 6 min read
javascript es6
Selected syntax in JavaScript ES2020, ES2021 and ES2022
Nullish coalescing, Optional chaining, Proxies, Private fields, allSettled, BigInt, Dynamic Import, replaceAll, Numeric Separators, matchAll, Logical Assignment, Top level await
Daniel Gustaw
• 19 min read
regression rust mathematics
CodinGame: Best fit to data - Rust - Regression Analysis
Linear and logarithmic regressions were derived here. Models were fitted in rust language. This article shows that sometimes it's worth improving the theoretical model before starting implementation.
Daniel Gustaw
• 6 min read
recursion typescript codingame
CodinGame: Derivative Time - Part 1, Recursion (Typescript)
Solution of CodinGame exercise. Simple recursion example with typescript. Formula representation inspired by lisp.
Daniel Gustaw
• 16 min read
quaternion rust nodejs
CodinGame: Quaternion Multiplication - Rust, NodeJS - Parsing, Algebra
In this article, we will see how to implement the multiplication of quaternions in Rust and NodeJS. You will learn about parsing and algebra.
Daniel Gustaw
• 17 min read
asci rust nodejs
CodinGame: ASCI Art - Rust, NodeJs - Strings, Arrays, Loops
Solving this puzzle teaches how to manage strings and array arithmetics. You'll know how to split a string into separate parts and concatenate them into a new one. You can use indexes of arrays
Daniel Gustaw
• 9 min read
typescript signatures javascript
Overload Signatures in Typescript
In TypeScript, we can specify a function that can be called in different ways by writing overload signatures. You can use this to define functions with returned type dependent from arguments values.
Daniel Gustaw
• 2 min read
metamask fastify nodejs
Login by Metamask - Rest Backend in Fastify (Node, Typescript, Prisma)
We building from scratch rest api in fastify using mongodb connected by prisma as database, jest as test framework and etherjs to verify signatures signed by metamask.
Daniel Gustaw
• 21 min read
nuxt strapi login
Login Component in Nuxt (Rest Strapi)
Simple example of login page in nuxt3 written as base to copy and paste in many similar projects.
Daniel Gustaw
• 4 min read
![Maximum Inequality [Linear Search] rust and typescript](/_astro/3e9e4456-ce05-4bd0-b136-7bbd4c952edd_BaUE6.avif)
linear-search rust nodejs
Maximum Inequality [Linear Search] rust and typescript
Simple hackeartch task solved in node js and rust. You con compare these two languages on example of this problem. I recommend to solve it independently before reading solutions.
Daniel Gustaw
• 6 min read
![Pulumi - Infrastructure as a Code [ Digital Ocean ]](/_astro/f370e14e-6fd0-48ef-b689-02d89d85bfb7_1QNSSS.avif)
pulumi iac deployment
Pulumi - Infrastructure as a Code [ Digital Ocean ]
With Pulumi you can define your it infrastructure in your file described by your favourite programming language. This article shows how to do it.
Daniel Gustaw
• 9 min read
![Last Occurrence [Linear Search] easy](/_astro/f0cf18ae-5174-47c0-81af-cb479a0c36b3_ITPYK.avif)
rust linear search easy
Last Occurrence [Linear Search] easy
Find and print the index of the last occurrence of element in the array.
Daniel Gustaw
• 2 min read
nodejs zipf typescript
Analysis of Zipf's Law in Node.js
Learn how to read large files in Node.js, count word occurrences using the Map object, and handle memory limits.
Daniel Gustaw
• 6 min read
typescript nodejs error
Retry Policy - How to Handle Random, Unpredictable Errors
Learn how to make random, unreproducible errors no longer a threat to your program.
Daniel Gustaw
• 6 min read
arch aur linux
Publishing an update of the package in the AUR repository
Learn how to publish package updates in the Arch Linux user repository.
Daniel Gustaw
• 3 min read
javascript numbers-therory mathematica
Least Common Multiple - Number Theory
Solution to the "Archery" problem from the "Number Theory" section of "Hacker Earth". The task is to determine the least common multiple of a sequence of numbers.
Daniel Gustaw
• 4 min read
ssl https security
How to configure SSL in local development
Setting up an https connection on the localhost domain can be challenging if you're doing it for the first time. This post is a very detailed tutorial with all the commands and screenshots.
Daniel Gustaw
• 12 min read
arch linux
Another installation guide for Arch Linux (i3)
Installing Arch Linux teaches me something new every time about disks, networks, and operating systems. I recommend it to you if you want a system tailored to your needs.
Daniel Gustaw
• 15 min read
attack hacking bolt
Bolt (always) Lite - MITM, Proxy, Insomnia and Vue
hack allowing to order bolt lite using man in the middle attack on app
Daniel Gustaw
• 5 min read
rust java nodejs
Benford's Law for the Fibonacci Sequence in Java, Rust, and Node JS
Programs written in Java, Rust, and Node JS compete in checking the distribution of the first digits of the Fibonacci sequence. See how they are similar, how they differ, and how their performance depends on the length of the sequence.
Daniel Gustaw
• 19 min read
nodejs cpu
Process Control in Node JS
Learn how to create and kill child processes in Node JS, dynamically manage their quantity, and conduct bidirectional communication with them.
Daniel Gustaw
• 16 min read
xss hacking attack
Xss attack using script style and image
Learn how to infect a page using an XSS attack with the script, style, or image tags. You can see how to replace the content of the page with your own even without javascript.
Daniel Gustaw
• 4 min read
web-api broadcast channel
Broadcast Channel API
This post shows how to use the Broadcast Channel API to send data between browser tabs or windows without using a server and sockets.
Daniel Gustaw
• 11 min read
maxdata typescript
Analysis of the frequency of altcoin names in the English language corpus
The aim of the article is to show how to filter out from all cryptocurrency names those that do not appear in natural language.
Daniel Gustaw
• 12 min read
mathematica mysql profiling
The impact of indexing on search performance in MySQL database
Using indexes speeds up searches and increases table size while slowing down modifications. The article shows how to profile queries and measure the impact of indexes on search performance.
Daniel Gustaw
• 15 min read
twitter cheerio scraping
Scraping the most popular Twitter accounts
Thanks to observing Twitter posts, we can track various trends. In this entry, I will show how to download data about accounts on this service and select those that have the highest influence ratio.
Daniel Gustaw
• 7 min read
mail yandex email
How to create a free email account with custom domain?
In this article, you will learn how to create a free email with a custom domain. I've shown how to configure Yandex with your DNS.
Daniel Gustaw
• 1 min read
telegram bot typescript
Telegram Bot in Typescript
Learn how to create a bot on Telegram, add command listening to it, and configure notification sending.
Daniel Gustaw
• 3 min read
symfony fosuserbundle google maps
Application with FOSUserBundle and Google Maps API
A simple app integrating the fos user bundle with Google Maps. The service allows for logging in, registration, and saving your list of locations validated by the Google API.
Daniel Gustaw
• 45 min read
https ssl certbot
Installation of a renewable TLS certificate (certbot + apache on Ubuntu)
There are many methods to obtain a certificate that allows encrypting HTTP traffic. One of them is installing Certbot and using it in conjunction with the Apache server.
Daniel Gustaw
• 2 min read
perl scraping
Data scraping in Perl
The article presents a simple scraper written in Perl 5. Despite handling three data records, its code is remarkably short.
Daniel Gustaw
• 11 min read
php compilation bunsenlabs
Compilation of PHP 7 interpreter in BunsenLabs
Compilation is a process that sometimes requires installing packages or linking dependencies. In this case, the task was to deliver php7 to a system that did not have it in the available repositories.
Daniel Gustaw
• 8 min read
spa mustache log
Analysis of Apache logs with GoAccess
In this post, I show a tool that allows you to extract interesting information from files automatically generated during server operation.
Daniel Gustaw
• 20 min read
mysql behat perl
Tesseract-OCR and testing selects.
We will read the content of the database table from the photo and write a few tests for database queries in Behat.
Daniel Gustaw
• 25 min read
python stock visualisation
Visualization of a dynamic correlation network.
Python script for visualizing the dynamics of the relationship between financial instruments measured by correlation.
Daniel Gustaw
• 16 min read
ajax mysql selenium
Data logging in MySql, Ajax, and Behat
We will write a simple web application - a calculator. Using it as an example, we will show how to configure selenium with behat and perform automated tests on it.
Daniel Gustaw
• 14 min read
facebook
Scraping Facebook in 2021
The article aims to familiarize the reader with the method for scraping the Facebook portal after the layout update.
Daniel Gustaw
• 18 min read
js es6 html
Fetch, Promise and Template String on example of To Do List in JavaScript
This simple project is great as an introduction to JavaScript programming. The emphasis is on ES6 elements and the frontend.
Daniel Gustaw
• 13 min read
pdf
We squeeze data from PDF like juice from a lemon
In this post, we will show how to conveniently extract data from PDF files by writing really minimal amounts of code.
Daniel Gustaw
• 7 min read
vue meteor
Communication between Vue components in Meteor
There is few methods of sending data between unrelated vue components. Some of these are universal, other typical for vue, another for Meteor. We compare all of them.
Daniel Gustaw
• 10 min read
algorithm
How many families can fit on the plane - an algorithmics problem
We compare two solutions to the problem of counting free sets of adjacent seats. You will learn how to use Profiling and how much difference the use of pop and shift makes on arrays in js.
Daniel Gustaw
• 12 min read
wordpress scraping
Scraping WordPress - 4300 court rulings in exchange rate lawsuits without a line of code
It is not often that the execution of a service takes longer than its pricing, but with scraping, this can happen. See how easy it can be to retrieve data, especially from WordPress.
Daniel Gustaw
• 2 min read
compatibility
How the war for compatibility shaped the frontend?
We describe how deprecation and maintaining backward compatibility have influenced the direction of web technology development.
Daniel Gustaw
• 5 min read
rails ruby
Ruby on Rails - quick introduction
Introduction to Ruby on Rails presenting CRUD, database relations, mailer, and web sockets communication.
Daniel Gustaw
• 12 min read
git
Git styled calendar with custom dates
git styled calendar created from list of dates saved as csv file
Daniel Gustaw
• 2 min read
iac
Infrastructure as Code (Terraform + Digital Ocean)
In this post, I show how to set up servers using the terraform command line.
Daniel Gustaw
• 3 min read
diff i18next
Calculating the Difference Between JSON Files
Learn how to find missing translations in JSON files with dictionaries.
Daniel Gustaw
• 3 min read
medical
Scraping of the Pharmacy Register
Data administrators hate it. See how by entering two commands in the console he downloaded the register of all pharmacies in Poland.
Daniel Gustaw
• 7 min read
contact
How to download contact data for 20k lawyers in an hour
Discover the parallel scraping technique that can significantly speed up data retrieval.
Daniel Gustaw
• 16 min read
libor mongo scraping
Scraping from money.pl in 30 lines of code.
See a simple case study of downloading and processing data from a paginated table.
Daniel Gustaw
• 8 min read
csv typescript parcel
Data Structuring on the Example of CHF NBP Course
Learn how to write code that normalizes and structures data based on a case study in the field of finance.
Daniel Gustaw
• 27 min read