frenchRoast, decaf];varcoffeeSizes = [small, medium, large];// build new objects that are combinations of the above// and put them into a new arrayvarcoffees = coffeeTypes.reduce(function(previous, current) {varnewCoffee = coffeeSizes.map(function(mixin) {// `plusmix` function for funct...
通过关键字new和构造函数调用创建的对象的原型就是构造函数prototype属性的值。因此,同使用{}创建对象一样,通过new Object()创建的对象也继承Object.prototype.同样,通过new arrary创建的对象原型就是Arrary.prototype,通过new Array()对象创建的对象的原型就是Date.prototype. 没有原型的对象为数不多,object.prototype就...
//#Source https://bit.ly/2neWfJ2// Define a function 'initialize_2D_Array' to create a 2D array with a specified width, height, and default value.constinitialize_2D_Array=(w,h,val=null)=>// Create an array with the specified height and map each element to an array with the specif...
const layer = new GeoJSONLayer({ portalItem: new PortalItem({ id: "81e769cd7031482797e1b0768f23c7e1", // optionally define the portal, of the item. // if not specified, the default portal defined is used. // see https://developers.arcgis.com/javascript/latest/api-reference/esri-config...
For example, Arcade allows you to define data values driving a visualization. If your layer has 100,000 features and has a renderer defined with an Arcade expression, that expression must execute 100,000 times to properly render the data. Because of this, the visualization profile prevents you...
} else if (typeof win.define === "function" && (win.define.amd || win.define.cmd)) { win.define("ComposeCanvas", [], function() { return ComposeCanvas; }); } else { win.ComposeCanvas = ComposeCanvas; } })(window); 1. ...
//Initialise Graph var g = new canvasGraph('graph'); //define some data gData=new Array(); gData[0]={x:500,y:500,z:500}; gData[1]={x:500,y:400,z:600}; gData[2]={x:500,y:300,z:700}; gData[3]={x:500,y:200,z:800}; gData[4]={x:500,y:100,z:900}; // sort ...
操作方法:运行ArcGIS9中的ArcMap,打开ArcToolBox,打开 Data Management Tools ->Projections and Transformations->Define Projection 项 打开坐标定义对话框。介下来在Input DataSet or Feature Class栏中输入或点击旁边的按钮选择相应的DataSet或Feature Class;在Coordinate System栏中输入或点击旁边的按钮选择需要为上述Data...
script.js - Asynchronous JavaScript loader and dependency manager. systemjs - AMD, CJS & ES6 spec-compliant module loader. LodJS - Module loader based on AMD. ESL - Module loader browser first, support lazy define and AMD. modulejs - Lightweight JavaScript module system.Transpile...
使用Object.defineProperties 可以一次定义多个属性 Object.defineProperties(object,description) object:对其添加或修改属性的对象,可以是本地对象或DOM对象 description:包含一个或多个描述符对象,每个描述符对象描述一个数据属性或访问器属性 var obj9 = { like:"miantiao" } Object.defineProperties(obj9,{ color:...