justinhartman

How to create self-signed SSL certificates for localhost

Option 1

Create a directory in your user root directory where we will store the necessary generated files.

$ cd ~/
$ mkdir .localhost
$ cd .localhost

Now run this single command and you will have both a certificate and private key which was used to sign the certificate.

monkeym4ster

#for not running docker, use save:
docker save <dockernameortag> | gzip > mycontainer.tgz

#for running or paused docker, use export:
docker export <dockernameortag> | gzip > mycontainer.tgz

#load
gunzip -c mycontainer.tgz | docker load

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

ebouchut

launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist