util.js

var deepEqual = require('deep-equal')

exports.has = function has (key, obj) {
  if (typeof key === 'string') { return Object.hasOwnProperty.call(obj, key) }
  for (var i in key) {
    if (Object.hasOwnProperty.call(obj, key[i])) { obj = obj[key[i]] } else { return false }
  }
  return true
}

exports.get = function get (key, obj) {
  if (typeof key === 'string') return obj[key]
  for (var i in key) {
    obj = obj[key[i]]
    if (!obj) return obj
  }
  return obj
}

exports.set = function set (key, value, obj) {
  if (typeof key === 'string') { obj[key] = value } else {
    for (var i = 0; i < key.length - 1; i++) {
      obj = (obj[key[i]] = obj[key[i]] || {})
    }
    obj[key[key.length - 1]] = value
  }
}

exports.findByPath = function (indexes, path) {
  return indexes.find(function (index) {
    return deepEqual(index.value, path)
  })
}