TODO:

Java thing:
Write a blog post about something as weird as a mutable list of immutable entities (like List[=>X], in scalaspeak).

So, you think you have a list (get it from the depths of a database); you walk over its elements and set something inside (apply State monad inside List monad); so what? the list will return a new instance every time, because what it does is recalculate the instance. like in

  List<Date> dateRange(Date from, Date to) {
    // imagine the code that just adds n days to from to get to
  }

If you think we should not change things, things are more complicated, think monad.

now typeclasses in scala

Here

Noisebridge got tv

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Нойзбридж - это санфранцисский дом культуры; мы там одно время категорный семинар собирали. Прикольный народ там.