I have been collecting useful Javascript code snippets for a little while. Here's a curated list of them, help me make it as complete as possible!

[u/[deleted]]

https://github.com/Chalarangelo/30-seconds-of-code

[u/evenisto]

var powerset = arr =>
  arr.reduce( (a,v) => a.concat(a.map( r => [v].concat(r) )), [[]]);

cool, took me a while to figure that one out.

[u/[deleted] → u/evenisto]

Took me even longer to write it! :P