Paul Chiusano

Functional programming, UX, tech, econ


Consulting services

I offer Scala and FP consulting services. If you're interested in working together, please contact me.

About my book

My book, Functional Programming in Scala, uses Scala as a vehicle for teaching FP. Read what people are saying about it.

Popular links

Unison: a next-gen programming platform the worldwide elastic computer (coming soon)
Type systems and UX: an example
CSS is unnecessary

Good teaching makes long-term investments in the learner

In my post on “Worse is Better”, I stated that software development could be viewed as a form of investment management:


The problematic culture of "Worse is Better"

Our industry has been infected by a dangerous meme, and it’s one that hasn’t been given its proper scrutiny. Like many memes that explode in popularity, “Worse is Better” gave a name to an underlying fragment of culture or philosophy that had been incubating for some time. I point to C++ as one of the first instances of what would later become “Worse is Better” culture. There had been plenty of programming languages with hacks and warts before C++, but C++ was the first popular language deliberately crippled for pragmatic reasons by a language designer who likely knew better. That is, Stroustrup had the skills and knowledge to create a better language, but he chose to accept as a design requirement retaining full compatibility with C, including all its warts.


In praise of universal warmth and kindness toward others in online discussions

A little over a month ago, I started an experiment in being “exceedingly polite” to everyone I interacted with online:


The internet has made defensive writers of us all

I was struck by this passage in Steven Pinker’s article about why academics’ writing stinks:


Making overly conservative language evolution a nonproblem

There was a recent thread on the Haskell reddit, sparked by a Neil Mitchell post arguing that various functions in the Haskell Prelude should not be generalized.