simple-squiggle

object.js (10188B)

---

 "use strict";
 
 var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.canDefineProperty = canDefineProperty;
 exports.clone = clone;
 exports.deepExtend = deepExtend;
 exports.deepFlatten = deepFlatten;
 exports.deepStrictEqual = deepStrictEqual;
 exports.extend = extend;
 exports.get = get;
 exports.hasOwnProperty = hasOwnProperty;
 exports.isLegacyFactory = isLegacyFactory;
 exports.lazy = lazy;
 exports.mapObject = mapObject;
 exports.pick = pick;
 exports.pickShallow = pickShallow;
 exports.set = set;
 exports.traverse = traverse;
 exports.values = values;
 
 var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
 
 var _is = require("./is.js");
 
 /**
  * Clone an object
  *
  *     clone(x)
  *
  * Can clone any primitive type, array, and object.
  * If x has a function clone, this function will be invoked to clone the object.
  *
  * @param {*} x
  * @return {*} clone
  */
 function clone(x) {
   var type = (0, _typeof2.default)(x); // immutable primitive types
 
   if (type === 'number' || type === 'string' || type === 'boolean' || x === null || x === undefined) {
     return x;
   } // use clone function of the object when available
 
 
   if (typeof x.clone === 'function') {
     return x.clone();
   } // array
 
 
   if (Array.isArray(x)) {
     return x.map(function (value) {
       return clone(value);
     });
   }
 
   if (x instanceof Date) return new Date(x.valueOf());
   if ((0, _is.isBigNumber)(x)) return x; // bignumbers are immutable
 
   if (x instanceof RegExp) throw new TypeError('Cannot clone ' + x); // TODO: clone a RegExp
   // object
 
   return mapObject(x, clone);
 }
 /**
  * Apply map to all properties of an object
  * @param {Object} object
  * @param {function} callback
  * @return {Object} Returns a copy of the object with mapped properties
  */
 
 
 function mapObject(object, callback) {
   var clone = {};
 
   for (var key in object) {
     if (hasOwnProperty(object, key)) {
       clone[key] = callback(object[key]);
     }
   }
 
   return clone;
 }
 /**
  * Extend object a with the properties of object b
  * @param {Object} a
  * @param {Object} b
  * @return {Object} a
  */
 
 
 function extend(a, b) {
   for (var prop in b) {
     if (hasOwnProperty(b, prop)) {
       a[prop] = b[prop];
     }
   }
 
   return a;
 }
 /**
  * Deep extend an object a with the properties of object b
  * @param {Object} a
  * @param {Object} b
  * @returns {Object}
  */
 
 
 function deepExtend(a, b) {
   // TODO: add support for Arrays to deepExtend
   if (Array.isArray(b)) {
     throw new TypeError('Arrays are not supported by deepExtend');
   }
 
   for (var prop in b) {
     // We check against prop not being in Object.prototype or Function.prototype
     // to prevent polluting for example Object.__proto__.
     if (hasOwnProperty(b, prop) && !(prop in Object.prototype) && !(prop in Function.prototype)) {
       if (b[prop] && b[prop].constructor === Object) {
         if (a[prop] === undefined) {
           a[prop] = {};
         }
 
         if (a[prop] && a[prop].constructor === Object) {
           deepExtend(a[prop], b[prop]);
         } else {
           a[prop] = b[prop];
         }
       } else if (Array.isArray(b[prop])) {
         throw new TypeError('Arrays are not supported by deepExtend');
       } else {
         a[prop] = b[prop];
       }
     }
   }
 
   return a;
 }
 /**
  * Deep test equality of all fields in two pairs of arrays or objects.
  * Compares values and functions strictly (ie. 2 is not the same as '2').
  * @param {Array | Object} a
  * @param {Array | Object} b
  * @returns {boolean}
  */
 
 
 function deepStrictEqual(a, b) {
   var prop, i, len;
 
   if (Array.isArray(a)) {
     if (!Array.isArray(b)) {
       return false;
     }
 
     if (a.length !== b.length) {
       return false;
     }
 
     for (i = 0, len = a.length; i < len; i++) {
       if (!deepStrictEqual(a[i], b[i])) {
         return false;
       }
     }
 
     return true;
   } else if (typeof a === 'function') {
     return a === b;
   } else if (a instanceof Object) {
     if (Array.isArray(b) || !(b instanceof Object)) {
       return false;
     }
 
     for (prop in a) {
       // noinspection JSUnfilteredForInLoop
       if (!(prop in b) || !deepStrictEqual(a[prop], b[prop])) {
         return false;
       }
     }
 
     for (prop in b) {
       // noinspection JSUnfilteredForInLoop
       if (!(prop in a)) {
         return false;
       }
     }
 
     return true;
   } else {
     return a === b;
   }
 }
 /**
  * Recursively flatten a nested object.
  * @param {Object} nestedObject
  * @return {Object} Returns the flattened object
  */
 
 
 function deepFlatten(nestedObject) {
   var flattenedObject = {};
 
   _deepFlatten(nestedObject, flattenedObject);
 
   return flattenedObject;
 } // helper function used by deepFlatten
 
 
 function _deepFlatten(nestedObject, flattenedObject) {
   for (var prop in nestedObject) {
     if (hasOwnProperty(nestedObject, prop)) {
       var value = nestedObject[prop];
 
       if ((0, _typeof2.default)(value) === 'object' && value !== null) {
         _deepFlatten(value, flattenedObject);
       } else {
         flattenedObject[prop] = value;
       }
     }
   }
 }
 /**
  * Test whether the current JavaScript engine supports Object.defineProperty
  * @returns {boolean} returns true if supported
  */
 
 
 function canDefineProperty() {
   // test needed for broken IE8 implementation
   try {
     if (Object.defineProperty) {
       Object.defineProperty({}, 'x', {
         get: function get() {}
       });
       return true;
     }
   } catch (e) {}
 
   return false;
 }
 /**
  * Attach a lazy loading property to a constant.
  * The given function `fn` is called once when the property is first requested.
  *
  * @param {Object} object         Object where to add the property
  * @param {string} prop           Property name
  * @param {Function} valueResolver Function returning the property value. Called
  *                                without arguments.
  */
 
 
 function lazy(object, prop, valueResolver) {
   var _uninitialized = true;
 
   var _value;
 
   Object.defineProperty(object, prop, {
     get: function get() {
       if (_uninitialized) {
         _value = valueResolver();
         _uninitialized = false;
       }
 
       return _value;
     },
     set: function set(value) {
       _value = value;
       _uninitialized = false;
     },
     configurable: true,
     enumerable: true
   });
 }
 /**
  * Traverse a path into an object.
  * When a namespace is missing, it will be created
  * @param {Object} object
  * @param {string | string[]} path   A dot separated string like 'name.space'
  * @return {Object} Returns the object at the end of the path
  */
 
 
 function traverse(object, path) {
   if (path && typeof path === 'string') {
     return traverse(object, path.split('.'));
   }
 
   var obj = object;
 
   if (path) {
     for (var i = 0; i < path.length; i++) {
       var key = path[i];
 
       if (!(key in obj)) {
         obj[key] = {};
       }
 
       obj = obj[key];
     }
   }
 
   return obj;
 }
 /**
  * A safe hasOwnProperty
  * @param {Object} object
  * @param {string} property
  */
 
 
 function hasOwnProperty(object, property) {
   return object && Object.hasOwnProperty.call(object, property);
 }
 /**
  * Test whether an object is a factory. a factory has fields:
  *
  * - factory: function (type: Object, config: Object, load: function, typed: function [, math: Object])   (required)
  * - name: string (optional)
  * - path: string    A dot separated path (optional)
  * - math: boolean   If true (false by default), the math namespace is passed
  *                   as fifth argument of the factory function
  *
  * @param {*} object
  * @returns {boolean}
  */
 
 
 function isLegacyFactory(object) {
   return object && typeof object.factory === 'function';
 }
 /**
  * Get a nested property from an object
  * @param {Object} object
  * @param {string | string[]} path
  * @returns {Object}
  */
 
 
 function get(object, path) {
   if (typeof path === 'string') {
     if (isPath(path)) {
       return get(object, path.split('.'));
     } else {
       return object[path];
     }
   }
 
   var child = object;
 
   for (var i = 0; i < path.length; i++) {
     var key = path[i];
     child = child ? child[key] : undefined;
   }
 
   return child;
 }
 /**
  * Set a nested property in an object
  * Mutates the object itself
  * If the path doesn't exist, it will be created
  * @param {Object} object
  * @param {string | string[]} path
  * @param {*} value
  * @returns {Object}
  */
 
 
 function set(object, path, value) {
   if (typeof path === 'string') {
     if (isPath(path)) {
       return set(object, path.split('.'), value);
     } else {
       object[path] = value;
       return object;
     }
   }
 
   var child = object;
 
   for (var i = 0; i < path.length - 1; i++) {
     var key = path[i];
 
     if (child[key] === undefined) {
       child[key] = {};
     }
 
     child = child[key];
   }
 
   if (path.length > 0) {
     var lastKey = path[path.length - 1];
     child[lastKey] = value;
   }
 
   return object;
 }
 /**
  * Create an object composed of the picked object properties
  * @param {Object} object
  * @param {string[]} properties
  * @param {function} [transform] Optional value to transform a value when picking it
  * @return {Object}
  */
 
 
 function pick(object, properties, transform) {
   var copy = {};
 
   for (var i = 0; i < properties.length; i++) {
     var key = properties[i];
     var value = get(object, key);
 
     if (value !== undefined) {
       set(copy, key, transform ? transform(value, key) : value);
     }
   }
 
   return copy;
 }
 /**
  * Shallow version of pick, creating an object composed of the picked object properties
  * but not for nested properties
  * @param {Object} object
  * @param {string[]} properties
  * @return {Object}
  */
 
 
 function pickShallow(object, properties) {
   var copy = {};
 
   for (var i = 0; i < properties.length; i++) {
     var key = properties[i];
     var value = object[key];
 
     if (value !== undefined) {
       copy[key] = value;
     }
   }
 
   return copy;
 }
 
 function values(object) {
   return Object.keys(object).map(function (key) {
     return object[key];
   });
 } // helper function to test whether a string contains a path like 'user.name'
 
 
 function isPath(str) {
   return str.indexOf('.') !== -1;
 }