Fs.blog

#code-hygiene

On Abstractions

If you find yourself adding more parameters and if-statements to an existing abstraction, is the abstraction still apt? Why not remove the old abstraction and re-extract a new [more apt] abstraction? Devs frequently succumb to the sunken cost fallacy thinking that there must have been a reason that the code was written in a certain way.

Mental Attitude While Learning

Distinguish Mere Facts From Conclusions or Opinions

Discriminate between mere statements of facts, necessary conclusions which follow therefrom, and mere opinions which they seem to render reasonable. There’s no need to perform an experiment to verify that the atomic weight of oxygen is 16. That the sum of the angles of a plane triangle equals two right angles is not a mere fact, but an inevitable truth.

Behavioralists believe that:

• Investors are not rational in present and future valuations of securities.
• There are substantial barriers to efficient arbitrage.

The Irrational Behavior of Individual Investors

Overconfidence

People tend to be overconfident, e.g. in a survey, 94% of male respondents believed that their athleticism was above average.

Hindsight bias makes the world seem predictable. Investors might think they can beat the market.

The tendency of “growth” stocks to underperform “value” stocks shows how overoptimistic growth forecasts are.