show and tell for hackers in DC.

Round 57: Avocado Prime

14 Jun 2018

Thank you WeWork for hosting and Data Society for sponsoring!

notes are copied from the hackpad

Nathan Epstein @Aeium

Convolution Toy. Presented on Tuesday on the art and code collective. Coloring in cellular automations. Using Wolframs rules or other fractals. Take a cellular automation and instead of setting the cell to one, set it to the sum of previous cells. Interpolate colors by using mods of the sums.

Color Scheme finder

Convolution Toy

Dan Cardy

Google Home lacked a feature I wanted. So I made it myself. Wanted to fix the sound API from Google Home vs the chromecast. Looked for something online, but nothing did. But google provides and API so I can do it myself! Convert speech to text to interface with Google Home and integrated it with a physical button.

See more

Clifford Patterson

A generative art project, presenting a summary of the process and then stepping through the code. Described what generative art is – the artist is the curator. Showed some examples of his generative art. Used Perlin noise.

Travis Hoppe - @metasemantic

Twitter Squares - Arranges profile images from a twitter search in a square t-sne using the Jonker-Volgenan algorithm. Features are generated from VGG16 (without fc layers on top).

Brian Collins

Helping out a friend who is a tour Guide in DC. He needed some information gathered from the web. Learned that tour guides get $10 every time their name is mentioned. Used beautifulsoup to scrape info for a friend that is a tour guide.

Aditya Jain - @whaleandpetunia

Visualizing the SF Muni system in realtime. The bus system (but worse). The map itself is built using a 9MB geo-json file which is too heavy to load. Can reduce the number of coordinates, but Aditya is a map purist – didn’t want to do that. Can use JS new fetch/async API to create a stream from an ndjson.

Resource on what is/how to work with async/await: Getting started with NDJsonStreams

Live demo for viz

Code for viz

Andrew Dunkman - @adunkman

DC’s 311 service doesn’t allow looking up service requests without knowing the original requester’s email address. This is problematic for service requests filed via Twitter, since they do not have email addresses — and therefore it’s difficult to lookup their statuses. Not anymore — this side project @dc311rn will now reply to your tweets with a link to check the status.

Twitter bot. 311 is for non-emergency services. Can use it lots of different ways, but Andrew likes to use Twitter. Turns out they give a service request number. There isn’t a good way to look up service request numbers via Twitter requests. Reverse engineered API to get data that was open but hidden.



Nick Soggin - @codebuddah

Made a Node.js module with the new N-API (non-experimental version). N-API has a bit of a learning curve, so I thought I’d share my findings :)



Harsha L Goonewardana - @Goonewardana

Sentiment analysis of r/democratic r/republican and r/The_Donald.