基本数据类型(值类型):String 字符串、Number 数值、Boolean 布尔值、Null 空值、Undefined 未定义。 引用数据类型(引用类型):Object 对象。 注意:内置对象 Function、Array、Date、RegExp、Error等都是属于 Object 类型。也就是说,除了那五种基本数据类型之外,其他的,都称之为 Object类型。 面试问:引用数据类型...
new LineString(ordinates, srid, (int)) This class defines a 2-d simple string. Parameters: NameTypeDescription ordinates Array A float number array that specifies the coordinates of the vertices. srid int An integer that specifies the spatial reference identifier (coordinate system), such ...
AI代码解释 asyncfunctionopen(path,flags,mode){mode=modeNum(mode,0o666);path=getPathFromURL(path);validatePath(path);validateUint32(mode,'mode');returnnewFileHandle(awaitbinding.openFileHandle(pathModule.toNamespacedPath(path),stringToFlags(flags),mode,kUsePromises));} src/node_file.cc 代码语...
constuserSchema =newSchema({firstName:String,lastName:String,email:String,password:String,permissionLevel:Number}); Once we define the schema, we can easily attach the schema to the user model. constuserModel = mongoose.model('Users', userSchema); ...
Command.command(nameAndArgs: string, opts?: CommandOptions | undefined): Command 其详细的接口描述如下: command(nameAndArgs: string, opts?: CommandOptions): ReturnType<this['createCommand']>;/*** 定义一个命令,在单独的可执行文件中实现。** @remarks* 命令描述作为第二个参数提供给 `.command`.*...
JS的一些扩展:String、StringBuilder、Uri 在最近一个小屁项目中,没有服务端(其实服务端是人家早已经写好的服务),留给我的就只有一大堆的Html和JS,写的好烦躁,所以就写了几个扩展。 多个不说的,这里只是记录,code附上,便以后查询: 代码 测试代码: 代码...
String对象提供charCodeAt()、fromCharCode()两个方法可以实现ascii与字符间的转换 // 字符转ascii'a'.charCodeAt();// ascii转字符String.fromCharCode('97') 可以搭配eval()函数实现混淆,将字符串转换成代码执行 // 变化前varaaa='hello';console.log(aaa);// 变化后vartest=[10,32,32,32,32,32,32,32,...
Pass the constructor a string. You will get back a JSDOM object, which has a number of useful properties, notably window: const dom = new JSDOM(`<!DOCTYPE html>Hello world`); console.log(dom.window.document.querySelector("p").textContent); // "Hello world" (Note that jsdom will pa...
// append new coordinates to the lineString geojson.features[0].geometry.coordinates.push([x,y]); // then update the map map.getSource('line').setData(geojson); } // Request the next frame of the animation. animation=requestAnimationFrame(animateLine); ...
Fit to the bounds of a LineString body{margin:0;padding:0;} #map{position:absolute;top:0;bottom:0;width:100%;} .btn-control{ font: bold12px/20px'Helvetica Neue', Arial, Helvetica, sans-serif; background-color:#3386c0; color:#fff; position:absolute...