FsiBot is a cloud hosted bot that evaluates F# expressions in mentions, built by Mathias Brandewinder. Underneath it uses the Twitter API, F# Compiler Services all hosted on Azure.
In the beginning the F# community put a lot of effort into
bringing it down testing it’s security. Nowadays it’s become more of a creative outlet for code golf enthusiasts showcasing all sorts from ASCII Art to math.
Tomas’s tree first appeared before @fsibot was cool or for that matter even existed:
An early attempt at ASCII art, the trick in Twitter is to use characters that are roughly the same width:
Along similar lines this expression uses a bitmap to produce an ASCII invader:
Here Mathias uses the same technique to generate a logo:
This expression charts Yes vs No in the recent vote on Scottish Independence:
The hailstone sequence:
Interesting Pi approximation using dates:
Evaluating an F# expression inside an F# expression:
The thing about a rick roll is that no-one should expect it:
Based on magic 8-ball here's a somewhat abridged version: