const { MongoClient } = require("mongodb"); let url="mongodb://127.0.0.1:27017"; let client=new MongoClient(url); async function run() { try{ await client.connect(); await client.db("gomall").command({ping:1}); console.log("连接服务器成功!"); }finally{ await client.close();...
AI代码解释 exportclassPaymentDto{@IsNotEmpty()@IsEnum(SERVICE_PROVIDER_SLUG,{message:`Invalid serviceProvider. Valid options are:${Object.values(SERVICE_PROVIDER_SLUG).join(', ')}`,})serviceProvider:string;@IsNotEmpty()@IsNumber()value:number;@IsNotEmpty()@IsString()validityPeriod:string;@Is...
server.on('connection',function(stream){console.log('someone connected!');}); 3once(event, listener) 为指定事件注册一个单次监听器,即 监听器最多只会触发一次,触发后立刻解除该监听器。 server.once('connection',function(stream){console.log('Ah, we have our first user!');}); 4removeListener...
}//往产品信息表插入数据asyncfunctioninsertTable() {try{varsql ="INSERT INTO production.product(name,author,publisher,publishtime,"+"product_subcategoryid,productno,satetystocklevel,originalprice,nowprice,discount,"+"description,photo,type,papertotal,wordtotal,sellstarttime,sellendtime) "+"VALUES(:1...
Commander.js是一个在NodeJS环境下便捷地用于构建搞质量命令行工具的库,vue-cli 等很多命令行工具都是由它构建。inquirer.js是一个实现交互式命令行界面的NodeJS库,通过使用该库能够帮我们实现命令界面的交互式。kolorist是一个 2. 命令的相关概念 3. 使用Commander.js搭建命令工行工具 ...
[46bee52d57] -doc: fix misaligned options in vm.compileFunction() (Jimmy Leung)#58145 [e732a8bfdd] -doc: fix typo in benchmark script path (Miguel Marcondes Filho)#58129 [d49ff34adb] -doc: add missing options.signal to readlinePromises.createInterface() (Jimmy Leung)#55456 ...
callback(Function):执行完 executeMany 后的回调函数。参数如下: 下面通过一个简单的例子来说明 executeMany 用法。 conn.executeMany( "insert into PERSON values(:1, :2, :3)", [ [101, '张三', '男'], [102, '李四', '女'] ], {
Possible values include: 'Invalid', 'Ok', 'Warning', 'Error', 'Unknown' is_seed_node Required bool Indicates if the node is a seed node or not. Returns true if the node is a seed node, otherwise false. A quorum of seed nodes are required for proper operation of Service Fabric ...
Values less than 0 are treated as 0, values greater than 1 are treated as 1. On some platforms ImageView might not support opacity variable. There is a known limitation of mixing opacity < 1.0 with a 3D Transform. Opacity/Blending is essentially a 2D image operation. The result of an...
This MATLAB function creates a tree node UI component inside a tree within a new figure window and returns the TreeNode object.