text: var low     = require('lowdb');
  var fs      = require('lowdb/adapters/FileSync');
  var adapter = new fs('db.json');
  var db      = low(adapter);
  
  // init the data store
  // ----------------------------
  db.defaults({ posts: []}).write();
  
  // add post
  // ----------------------------
  
  db.get('posts')
    .push({ id: 3, title: 'cool', published:'true'})
    .write()
  
  db.get('posts')
    .push({ id: 4, title: 'great', published:'true'})
    .write()  
  
  // count posts
  // ----------------------------
  // YOUR CODE
  
  // find all posts ids
  // ----------------------------
  // YOUR CODE
  
  // all matches of published false
  // ----------------------------
  // YOUR CODE
  
  // find post with published false
  // ----------------------------
  // YOUR CODE
  