Coin Rush

Air quality is pretty bad today and schools are closed. We're staying inside, and my son used the time to make another video game:

My son programmed his first stack overflow

My son programmed his first stack overflow today using polyup.

NAND gate toy

A small interactive toy NAND gate:

A mantra for both the high times and the low

At any moment, this could be over

Toy game about parity

Resources for San Francisco Bay Area parents

Events and Activities


  • Citizen app has real-time alerts of police and fire department activity:
  • Megan's Law map:

Mailing lists

Living in San Francisco without a car

First, some assumptions from early 2018:

  • Two adults and one child (when paying for transit)
  • Car ownership cost of $540/month ($300/month parking +$120/month depreciation +$100/month maintenance +$20/month registration and fees)
  • $3.60/gallon gas price
  • 24 miles/gallon

Example round trip of 11 miles to San Bruno for 5.5 hours (early 2018)

Cutie Fish and Bear

We got two guppies as a gift. The kids named them "Cutie Fish" and "Bear".

Kappa Architecture

The actor model, functional programming (including both Map Reduce flavor and Haskell streaming flavor) and materialized views seem to be merging together and producing love children that the cool kids are calling reactive programming and the "kappa" architecture.

This talk about Apache Samza had an insight was new to me -- that you could conceptually think of your video memory in your graphics card as

Against Empathy

Paul Bloom gave an interview on EconTalk to promote his book Against Empathy: The Case for Rational Compassion and talk about why empathy (as opposed to compassion) is a leading motivator of inequality and immorality in society.

The quote about empathy in parenting decision making particularly struck me:


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