'use strict';
  
  var toInteger    = require('../../../number/to-integer')
    , toPosInt     = require('../../../number/to-pos-integer')
    , isPlainArray = require('../../is-plain-array')
  
    , isArray = Array.isArray, slice = Array.prototype.slice
    , hasOwnProperty = Object.prototype.hasOwnProperty, max = Math.max;
  
  module.exports = function (start, end) {
  	var length, result, i;
  	if (!this || !isArray(this) || isPlainArray(this)) {
  		return slice.apply(this, arguments);
  	}
  	length = toPosInt(this.length);
  	start = toInteger(start);
  	if (start < 0) start = max(length + start, 0);
  	else if (start > length) start = length;
  	if (end === undefined) {
  		end = length;
  	} else {
  		end = toInteger(end);
  		if (end < 0) end = max(length + end, 0);
  		else if (end > length) end = length;
  	}
  	if (start > end) start = end;
  	result = new this.constructor(end - start);
  	i = 0;
  	while (start !== end) {
  		if (hasOwnProperty.call(this, start)) result[i] = this[start];
  		++i;
  		++start;
  	}
  	return result;
  };