This post describes how to create a simple Django web app in Ubuntu as of December 2019. Setting up the virtual environment It is best practice to not only package all dependencies within a virtual environment, but to save them in a requirements.txt file. This makes it possible to clone the project easily from git….
Every time you navigate to a new URL, your browser checks to see if it is in a list of millions of malicious sites. Normally, searching through such a list would take minutes. Anything more than a few milliseconds would make it unusable. So how do they pull it off? Bloom filters! A bloom filter…
Non-Sequential Base Systems Bitcoin’s Base58 Base58 is a binary to text encoding developed for displaying the 20-byte integer representing a Bitcoin address. Base58 is the same as base 64, but without the +, /, 0, O, I, and l symbols. 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz The encoding prevents confusion between letters, especially when handwritten and across different fonts. The…
Text is my personal favorite medium for machine learning. Here is why: In computing, a picture is worth a (few hundred) thousand words. As a result, modeling text is more space and compute efficient than visual models. Text arrived first to the internet. This lead time has resulted in better algorithms, and bottomless data. Interpretability…
This article has been updated to reflect changes suggested by one of our readers. Thanks Andrew! New information, released in an instant, can synchronize the behavior of millions of people. This is magnified by the impact of the information, and the transience of its release. Wikipedia editors edit related pages during such events, reducing the…
Since the launch of its public beta in 2008, Glassdoor has become the gold standard for company satisfaction ratings. They also have a classifieds section comparable to LinkedIn, Indeed, and others. Glassdoor provides examples of job descriptions with company ratings in context. This makes it easy to compare what good and bad companies have in…
Matplotlib has become the standard plotting library in Python. This is thanks to its simple API and NumPy/SciPy integration, making it easy to add interactive plots to any code. In this post, I will walk through how to make animated 3D plots in Matplotlib, and how to export them as high quality GIFs. RGB Color…
1. The world is getting poorer In the early 1800s, the world population hit one billion for the first time. Four in five were in extreme poverty. Now, that number is under 10%. The United Nations has set a goal to eliminate extreme poverty by 2030. 2. There is a first-world and a third-world There…
Society has unlocked vast amounts of value by harnessing the power of the graphs. First, we used graphs as infrastructure for running water, electricity, and the internet. Then, we used graphs as platforms for further applications. The refrigerator and washing machine are second-layer graph technologies, as are Google and Facebook. The networks people are looking…
What is context-free grammar? A grammar is a set of production rules for a language. Context-free grammar is any grammar that is of the form , where is a finite set of nonterminal characters, is a finite set of terminal characters, is the relation from to , and is the start symbol. This is what…