util

util.js

_.type = function (obj) {
  return Object.prototype.toString.call(obj).replace(/\[object\s|\]/g, '')
}

_.isArray = function isArray (list) {
  return _.type(list) === 'Array'
}

_.slice = function slice (arrayLike, index) {
  return Array.prototype.slice.call(arrayLike, index)
}

_.truthy = function truthy (value) {
  return !!value
}

_.isString = function isString (list) {
  return _.type(list) === 'String'
}

_.each = function each (array, fn) {
  for (var i = 0, len = array.length; i < len; i++) {
    fn(array[i], i)
  }
}

_.toArray = function toArray (listLike) {
  if (!listLike) {
    return []
  }

  var list = []

  for (var i = 0, len = listLike.length; i < len; i++) {
    list.push(listLike[i])
  }

  return list
}