20. Tü.λ – On Closures and Objects

# Schedule

18:45 Doors open & Welcome

I. On Closures and Objects (Beat)

The venerable master Qc Na was walking with his student, Anton. Hoping to prompt the master into a discussion, Anton said "Master, I have heard that objects are a very good thing - is this true?" Qc Na looked pityingly at his student and replied, "Foolish pupil - objects are merely a poor man's closures." ...

There's many things that enable a functional style in a program, but only one that's really needed: Closures.
It's a shame that still not all languages have them—but lucklily, we can just write our own using Objects.
Same for Objects: When you really want to have a thing you can send messages to and that closes over some local state, Objects are actually a good abstraction and tool to be had in your toolkit. Not all languages have them, some decidedly on purpose—but you make your own, too.

Food, Talking Coding

II. NixOS Install Party (Michael, Beat)

Bring your laptop, and we will install NixOS (dual-boot is fine, too :)) on it together.
After this session, you should:

• Have a working NixOS install
• Know how to install new packages
• Know how to update your packages
• Know how rebuild your OS
• Know where to look when things go awry

22:00 End

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