Blog

Lockhart's lament gone wrong

I just read Lockhart's lament... or should I say, rant? The essay is about how...

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Distributed chat

I've been doing Martin Kleppmann's distributed systems course, and though I am liking it...

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Distributed ping pong

I've been doing Martin Kleppmann's distributed systems course, and though I am liking it...

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Distributed systems part 1

I started the course by Martin Kleppmann on distributed systems and I already know it's...

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How to lie with statistics

This is a book written by Darrell Huff in 1954. It's like an introduction to...

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API app with a frontend

What does setting up a Ruby fullstack app looks like in 2022? Whenever I had...

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Wordle clone

I guess we are all sad from the news that the NYT has bought Wordle......

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The art of not giving...

I got this book in 2015 and it has taken me this long to read...

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How to work with Python...

Four years ago I had to use Python at work, so I had to figure...

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Hyperparameters and normalization

Hyperparameters There are many hyperparameters that we can fine-tune when training a model. In previous...

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Weight initialization

Vanishing and exploding gradients The gradient of the loss with respect to any weight is...

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Backpropagation and the maths behind...

The process of moving the data forward through the network is called forward propagation. Backpropagation...

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Convolutional networks

A convolutional neural network / CNN / ConvNet is an artificial neural network that detects...

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Overfitting / underfitting and supervised...

Overfitting and Underfitting Overfitting Overfitting occurs when our model becomes really good at being able...

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Datasets and predictions

Dataset types The the training dataset is separate from both the validation dataset and the...

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Loss function and learning rate

Loss function The loss function is what SGD is attempting to minimize by iteratively...

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Training and learning

Training When we train a neural network, we are trying to optimize the weights associated...

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Artificial neural networks

An artificial neural network is a computing system that is comprised of a collection of...

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I am learning to play...

Something that always caught my attention is percussion. In particular the more tribal sounds like...

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What I did after upgrading...

In Ubuntu 18 some functionality has changed. Also, the Xorg system has been replaced by...

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Legacy-code retreat - Rainsberger's Trivial

8:30 AM, Saturday right after a three-day work retreat. My phone alarm reminds me that...

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Her

Her tells the story of a lonely and shy guy who is dumped three times...

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What happens when you request...

This is a question that I ask my students often as it can come up...

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Custom Google search

For a long time I had a disfunctional search in my site. It is a...

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Progressive webapps

Native applications have the ability to start up fast and reliably. They can work offline,...

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The shape of water

I went to see The Shape of Water! I love everything that Guillermo del Toro...

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Property-based testing

2019 update: It's still difficult to find information about property-based testing, but I found

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Cybersecurity workshop

I attended a cybersecurity workshop recently, so I wanted to share my notes. There are...

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Travis integration for Slack

I recently wanted to post notifications from Travis builds in a Slack channel. There is...

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How to install Ubuntu in...

Recently I tried to install Ubuntu 16.04 in a new Lenovo Yoga 3 which came...

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I am Diana of Themyscira

...daughter of Hippolyta, queen of the Amazons, and your wrath upon this world is...

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Porting a site: from Django...

I recently worked on a project to port Pombola, a Django site to a...

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Google calendar integration with Thunderbird...

These days almost every company I have worked with uses gmail to manage the company...

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How to install nvm outside...

A bit of context You can install node in Ubuntu with the apt-get manager...

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How to install Ubuntu in...

I have been using dual-booted systems with Windows and Ubuntu since I bought my first...

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Hidden Figures

This post has spoilers, so if you haven't seen the movie, stop reading! Today I...

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Ruby decorators, inheritance, mixins, Forwardable...

This is the story of an exploration of options I did recently. Explorations are fun...

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Error handling in Sinatra

I try to put none or very few logic in the routes of a Sinatra...

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Installing CMake

I'll be honest: I haven't used Make or CMake in ages. But sometimes you need...

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Django pagination

You may know that Django comes with a paginator out of the box. It's...

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Django cheatsheet

These are my notes from the Try Django and Digging into Django, courses....

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Virtual environments in Python

While working in your Python app, you may need to install packages to add extra...

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Python cheatsheet

From today on, I have new tasks and responsibilites at work, for which I need...

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HTML validation in minitest with...

You would think that automatic HTML validation or malformed markup detection is a well solved...

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Running processes in the background...

The other day I had a surprise in Travis. I wrote my first scraper...

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Dev summer, Cambridge 2016

Last week, on the 25 of June, one of the best events of the year...

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Client-side zipping on the fly

Recently I needed to find a solution to Zip some files on the fly (client-side)...

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Checkbox hack alternatives

The checkbox hack is when you use an <input> element of type "checkbox" to...

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Atom Editor Keyboard Shortcut Cheat-Sheet

I'm trying out Atom after hearing so much about it. Before I have used...

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My notes from the Rails...

These are some notes I took some time ago while I was going through the...

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First steps with Rails

Rails is hard! At least harder than I thought. If you are a control freak...

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Responsive / responsible development

Introduction What do you understand by responsive? Responsive development is about adapting to the unknown....

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Lovelace and Babbage comic book...

I finally could make some time to read The Thrilling Adventures of Lovelace and...

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First steps with Erlang

Everyone is excited about Elixir, the programming language built on top of Erlang that shares...

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How I installed Vagrant in...

You will need to install two things: Vagrant A virtual machine To install...

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Purge old kernel modules

The other day for the first time I received a message of "disk out of...

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Tachyons explained with Frisbees

If you ever heard the joke: The barman says: “We don’t serve faster-than-light particles here.”

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A look at promises in...

Everybody is talking about promises in JavaScript as a replacement for callback hell. So I...

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Perform SQL queries in CSV

Today I discovered a command-line tool that allows you to do SQL queries in a...

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How to install Phantom in...

I recently wanted to try out Phantom as a headless browser for JavaScript tests. Up...

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Telling git to track an...

I'm working on a new personal project, were I'll share my C# snippets. As all...

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GitHub as CDN?

I have all my projects' sites hosted at GitHub pages, but I also have some...

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Stack Overflow has a new...

As every other developer and their dog, I crash from time to time in SO...

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How to force push to...

This post should start with a big red warning: Never force push to master, evah!...

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Remember websites back in the...

The other day I was doing some cleaning on my hard disk and I found...

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Freeing space in Windows

Oh, heya! This is a post about "Things I learned trying to gain some space...

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Playing with MongoDB

This is meant to be a small collection of notes that I wrote here and...

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Working with SVG from JavaScript

For a while I've been trying to do a web based tic-tac-toe game just so...

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Database types comparison table

There are so many different kinds of databases available today, to the point that sometimes...

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Different display names in your...

You probably have used Disqus to manage the comments of some of your sites....

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Git etiquette

"The biggest why for git's existence is telling the story of your project"...

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Similarities between a researcher and...

This post will not be interesting for many people unless they are or have been...

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What I learned making a...

For some time I worked in a collaborative podcast with people from all around the...

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Categories sorted in custom order...

Yet another site, this time for my project about Numerical Recipes applied to thermodynamics problems,...

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Highlight current menu item in...

I decided to share my lab course from back in 2005, when I was teaching...

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Custom WordPress plugins

Some of the WordPress official themes are certainly beautiful to the eye and have nice...

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Designing a book's layout with...

I just re-designed and old PDF lab guide I made long time ago for a...

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Find and replace in several...

I often find myself having to find a set of characters in several files and...

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Custom menu in Jekyll for...

I just launched https://javasnippets.tk, a site for a repo where I plan to collect...

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My first Jekyll site

Update (2014-08-05): There is a new post on Smashing Magazine about how to create...

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Where to place the gh-pages...

It's 2012 and I officially switched to git (finally!) and it seemed natural to...

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ls colors in Windows git...

I started using git recently, and I installed it in my Ubuntu partition, as well...

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Making a widget region from...

If you start off with a blank theme and you don't have any widget areas...

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How to read data from...

This post is part of a series of three posts. Check them out!:

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How to read data from...

This post is part of a series of three posts. Check them out!:

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How to read data from...

This post is part of a series of three posts. Check them out!:

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The cool octopus

Some facts about the coolest animal: the octopus They are royalty! they have blue...

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