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network-visualization/node_modules/object-copy/index.js

@@ -0,0 +1,174 @@
+'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;