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Created: 2022-09-10

I’m 100% with John Ousterhout on the value of good APIs (interfaces).

In my own words, an API should:

  1. Provide good defaults and make base cases easy

  2. Not hide what cannot be hidden

  3. Hide everything else and do the nasty work behind the scenes

A good API is a layer.

A good layer lets you think about just one thing at a time.

I think the "network "stack" is a great example: HTTP doesn’t know anything about TCP/IP, which doesn’t know anything about Ethernet, etc.

Layers are rarely perfect, but without them, we would drown in complexity.

Related: MVC Sucks.