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legacyCoffeesScriptHelpers.js
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/* * Copyright (C) 2018 - present Instructure, Inc. * * This file is part of Canvas. * * Canvas is free software: you can redistribute it and/or modify it under * the terms of the GNU Affero General Public License as published by the Free * Software Foundation, version 3 of the License. * * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more * details. * * You should have received a copy of the GNU Affero General Public License along * with this program. If not, see <http://www.gnu.org/licenses/>. */ const hasProp = {}.hasOwnProperty export function extend(child, parent) { for (const key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key] } function Ctor() { this.constructor = child } Ctor.prototype = parent.prototype child.prototype = new Ctor() child.__super__ = parent.prototype return child } /** * since you can't use es6 Object initializer getter shorthand (eg: {get foo(){ return 'bar'}}) * in coffeescript, this is a helper to do it the manual way using Object.defineProperty * @param {Object} [hostObject] the object that you want to define the getters onto * @param {Object} getters key/value pairs of "propertyName" and getter functions. eg: {foo: () => "bar"} * @returns {Object} hostObject */ export function shimGetterShorthand(hostObject, getters) { Object.keys(getters).forEach(key => Object.defineProperty(hostObject, key, { get: getters[key], enumerable: true, configurable: true, }) ) return hostObject }