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- 'use strict';
-
- var util = require('util');
- var union = require('arr-union');
- var define = require('define-property');
- var staticExtend = require('static-extend');
- var isObj = require('isobject');
-
-
-
- var cu = module.exports;
-
-
-
- cu.isObject = function isObject(val) {
- return isObj(val) || typeof val === 'function';
- };
-
-
-
- cu.has = function has(obj, val) {
- val = cu.arrayify(val);
- var len = val.length;
-
- if (cu.isObject(obj)) {
- for (var key in obj) {
- if (val.indexOf(key) > -1) {
- return true;
- }
- }
-
- var keys = cu.nativeKeys(obj);
- return cu.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.');
- };
-
-
-
- cu.hasAll = function hasAll(val, values) {
- values = cu.arrayify(values);
- var len = values.length;
- while (len--) {
- if (!cu.has(val, values[len])) {
- return false;
- }
- }
- return true;
- };
-
-
-
- cu.arrayify = function arrayify(val) {
- return val ? (Array.isArray(val) ? val : [val]) : [];
- };
-
-
-
- cu.noop = function noop() {
- return;
- };
-
-
-
- cu.identity = function identity(val) {
- return val;
- };
-
-
-
- cu.hasConstructor = function hasConstructor(val) {
- return cu.isObject(val) && typeof val.constructor !== 'undefined';
- };
-
-
-
- cu.nativeKeys = function nativeKeys(val) {
- if (!cu.hasConstructor(val)) return [];
- var keys = Object.getOwnPropertyNames(val);
- if ('caller' in val) keys.push('caller');
- return keys;
- };
-
-
-
- cu.getDescriptor = function getDescriptor(obj, key) {
- if (!cu.isObject(obj)) {
- throw new TypeError('expected an object.');
- }
- if (typeof key !== 'string') {
- throw new TypeError('expected key to be a string.');
- }
- return Object.getOwnPropertyDescriptor(obj, key);
- };
-
-
-
- cu.copyDescriptor = function copyDescriptor(receiver, provider, name) {
- if (!cu.isObject(receiver)) {
- throw new TypeError('expected receiving object to be an object.');
- }
- if (!cu.isObject(provider)) {
- throw new TypeError('expected providing object to be an object.');
- }
- if (typeof name !== 'string') {
- throw new TypeError('expected name to be a string.');
- }
-
- var val = cu.getDescriptor(provider, name);
- if (val) Object.defineProperty(receiver, name, val);
- };
-
-
-
- cu.copy = function copy(receiver, provider, omit) {
- if (!cu.isObject(receiver)) {
- throw new TypeError('expected receiving object to be an object.');
- }
- if (!cu.isObject(provider)) {
- throw new TypeError('expected providing object to be an object.');
- }
- var props = Object.getOwnPropertyNames(provider);
- var keys = Object.keys(provider);
- var len = props.length,
- key;
- omit = cu.arrayify(omit);
-
- while (len--) {
- key = props[len];
-
- if (cu.has(keys, key)) {
- define(receiver, key, provider[key]);
- } else if (!(key in receiver) && !cu.has(omit, key)) {
- cu.copyDescriptor(receiver, provider, key);
- }
- }
- };
-
-
-
- cu.inherit = function inherit(receiver, provider, omit) {
- if (!cu.isObject(receiver)) {
- throw new TypeError('expected receiving object to be an object.');
- }
- if (!cu.isObject(provider)) {
- throw new TypeError('expected providing object to be an object.');
- }
-
- var keys = [];
- for (var key in provider) {
- keys.push(key);
- receiver[key] = provider[key];
- }
-
- keys = keys.concat(cu.arrayify(omit));
-
- var a = provider.prototype || provider;
- var b = receiver.prototype || receiver;
- cu.copy(b, a, keys);
- };
-
-
-
- cu.extend = function() {
-
- return staticExtend.apply(null, arguments);
- };
-
-
-
- cu.bubble = function(Parent, events) {
- events = events || [];
- Parent.bubble = function(Child, arr) {
- if (Array.isArray(arr)) {
- events = union([], events, arr);
- }
- var len = events.length;
- var idx = -1;
- while (++idx < len) {
- var name = events[idx];
- Parent.on(name, Child.emit.bind(Child, name));
- }
- cu.bubble(Child, events);
- };
- };
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