Acme.BookStore.HttpApi.Host/node_modules/object-copy/index.js

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'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.