node-revert-keys

take a key - value list object and invert it to be easily searchable

usage

var revert = require("revert-keys");
var obj = {
  "action1":["key1","key2"],
  "action2":["key3","key4"]
}

var rev = revert(obj);

/*
  { key1: 'action1',
  key2: 'action1',
  key3: 'action2',
  key4: 'action2' }
 */