| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174 | 
							- 'use strict';
 
- var typeOf = require('kind-of');
 
- var copyDescriptor = require('copy-descriptor');
 
- var define = require('define-property');
 
- /**
 
-  * Copy static properties, prototype properties, and descriptors from one object to another.
 
-  *
 
-  * ```js
 
-  * function App() {}
 
-  * var proto = App.prototype;
 
-  * App.prototype.set = function() {};
 
-  * App.prototype.get = function() {};
 
-  *
 
-  * var obj = {};
 
-  * copy(obj, proto);
 
-  * ```
 
-  * @param {Object} `receiver`
 
-  * @param {Object} `provider`
 
-  * @param {String|Array} `omit` One or more properties to omit
 
-  * @return {Object}
 
-  * @api public
 
-  */
 
- function copy(receiver, provider, omit) {
 
-   if (!isObject(receiver)) {
 
-     throw new TypeError('expected receiving object to be an object.');
 
-   }
 
-   if (!isObject(provider)) {
 
-     throw new TypeError('expected providing object to be an object.');
 
-   }
 
-   var props = nativeKeys(provider);
 
-   var keys = Object.keys(provider);
 
-   var len = props.length;
 
-   omit = arrayify(omit);
 
-   while (len--) {
 
-     var key = props[len];
 
-     if (has(keys, key)) {
 
-       define(receiver, key, provider[key]);
 
-     } else if (!(key in receiver) && !has(omit, key)) {
 
-       copyDescriptor(receiver, provider, key);
 
-     }
 
-   }
 
- };
 
- /**
 
-  * Return true if the given value is an object or function
 
-  */
 
- function isObject(val) {
 
-   return typeOf(val) === 'object' || typeof val === 'function';
 
- }
 
- /**
 
-  * Returns true if an array has any of the given elements, or an
 
-  * object has any of the give keys.
 
-  *
 
-  * ```js
 
-  * has(['a', 'b', 'c'], 'c');
 
-  * //=> true
 
-  *
 
-  * has(['a', 'b', 'c'], ['c', 'z']);
 
-  * //=> true
 
-  *
 
-  * has({a: 'b', c: 'd'}, ['c', 'z']);
 
-  * //=> true
 
-  * ```
 
-  * @param {Object} `obj`
 
-  * @param {String|Array} `val`
 
-  * @return {Boolean}
 
-  */
 
- function has(obj, val) {
 
-   val = arrayify(val);
 
-   var len = val.length;
 
-   if (isObject(obj)) {
 
-     for (var key in obj) {
 
-       if (val.indexOf(key) > -1) {
 
-         return true;
 
-       }
 
-     }
 
-     var keys = nativeKeys(obj);
 
-     return has(keys, val);
 
-   }
 
-   if (Array.isArray(obj)) {
 
-     var arr = obj;
 
-     while (len--) {
 
-       if (arr.indexOf(val[len]) > -1) {
 
-         return true;
 
-       }
 
-     }
 
-     return false;
 
-   }
 
-   throw new TypeError('expected an array or object.');
 
- }
 
- /**
 
-  * Cast the given value to an array.
 
-  *
 
-  * ```js
 
-  * arrayify('foo');
 
-  * //=> ['foo']
 
-  *
 
-  * arrayify(['foo']);
 
-  * //=> ['foo']
 
-  * ```
 
-  *
 
-  * @param {String|Array} `val`
 
-  * @return {Array}
 
-  */
 
- function arrayify(val) {
 
-   return val ? (Array.isArray(val) ? val : [val]) : [];
 
- }
 
- /**
 
-  * Returns true if a value has a `contructor`
 
-  *
 
-  * ```js
 
-  * hasConstructor({});
 
-  * //=> true
 
-  *
 
-  * hasConstructor(Object.create(null));
 
-  * //=> false
 
-  * ```
 
-  * @param  {Object} `value`
 
-  * @return {Boolean}
 
-  */
 
- function hasConstructor(val) {
 
-   return isObject(val) && typeof val.constructor !== 'undefined';
 
- }
 
- /**
 
-  * Get the native `ownPropertyNames` from the constructor of the
 
-  * given `object`. An empty array is returned if the object does
 
-  * not have a constructor.
 
-  *
 
-  * ```js
 
-  * nativeKeys({a: 'b', b: 'c', c: 'd'})
 
-  * //=> ['a', 'b', 'c']
 
-  *
 
-  * nativeKeys(function(){})
 
-  * //=> ['length', 'caller']
 
-  * ```
 
-  *
 
-  * @param  {Object} `obj` Object that has a `constructor`.
 
-  * @return {Array} Array of keys.
 
-  */
 
- function nativeKeys(val) {
 
-   if (!hasConstructor(val)) return [];
 
-   return Object.getOwnPropertyNames(val);
 
- }
 
- /**
 
-  * Expose `copy`
 
-  */
 
- module.exports = copy;
 
- /**
 
-  * Expose `copy.has` for tests
 
-  */
 
- module.exports.has = has;
 
 
  |