JSshortcuts.md

Nesting:

when you want to make an object into a nested dictionary (1 key multiple values) http://learnjsdata.com/group_data.html

var nest  = d3.nest()
  .key(function(d) { return d.name; })
  .entries(expenses);

Mapping

var map = new Map(data.nodes.map(d=> [d.id,d]))
map.get(261)

App packaging

# for use in npm scripts
npm install electron-packager --save-dev

# for use from cli
npm install electron-packager -g

npm install --save-dev electron
electron-packager . --overwrite --platform=darwin --arch=x64 --icon=assets/icons/mac/icon.icns --prune=true --out=release-builds