node js foreach loop

inability to play a performance advantage. Despite the failure, Ryan Dahl generally felt that the key to solving the problem was to achieve the goal through event-driven and asynchronous I/O.As soon as he was desperate, the V8 engine came. V8 meets his imagination about high-performance Web servers: No historical baggage, no synchronous I/O. There is no situation where a synchronous I/O causes a dramatic decrease in event loop performance.

Detailed description of Node. js Streams file read and write operations, node. jsstreams Node. js is inherently asynchronous and event-driven, and is very suitable for processing I/O-related tasks. If you are dealing with I/O-related operations in the application, you can us

1 DivID= "Div">2 TableID= "tab">3 TR>4 th>Numberth>5 th>Nameth>6 th>Genderth>7 th>Ageth>8 TR>9 Table>Ten Div>The HTML content table adds rows and cells to JS and has a delete keyWindow.onload =function(){ vardata = [ [1, "Wang Paoli", "Male", "10"], [2, "Shang", "Male", "11"], [3, "Li Qingkun", "Male", "12"], [4, "Chen Peng", "Male", "33"] ]; //in

of Node is the construction of high-performance, highly scalable Internet applications-because it can handle massive and high-throughput concurrent connections. Its working principle is quite interesting. The traditional network service technology generates a new thread for each new connection request. This new thread will occupy the system memory and eventually occupy all available memory. Node.

building high-performance, highly scalable Internet applications-because it handles massive and high-throughput concurrent connections.How it works is quite interesting. The traditional Network Service technology, is each new connection (request) will generate a new thread, this new thread will occupy the system memory, will eventually take up all the available memory. While node. JS is only running in one

Node. js blog instance (10) pv statistics and message statistics, node. jspv Original tutorial. In post. js, modify var post = {...} To (after each change, clear e:/mongodb/blog ): // Document var post = {name: this. name, time: time, title: this. title, post: this. post, tags: this. tags, comments: [], pv: 0 };The pv

scalable Internet applications-because it handles massive and high-throughput concurrent connections.How it works is quite interesting. The traditional Network Service technology, is each new connection (request) will generate a new thread, this new thread will occupy the system memory, will eventually take up all the available memory. While node. JS is only running in one single thread, using non-blocking

Use Javascript Generators in Node. js for details, node. jsgenerators Generators is a collaborative program (coroutine for short: coroutine) style in Javascript. It refers to the functions that can be paused and restored during execution, this function is configured with a star symbol in functi, such as function *. Some feature keywords in the function, such as y

JS node, are aware of 3 major categories:ELEMENT nodeAttribute nodeText nodeThe common element node, the attribute node. There are two ways, SetAttribute () getattribute (), setting and getting property valuesIn the actual work, long we get a bunch of data from backstage, to show on the front page.After we have written

event queue during execution, the program enters the event loop at execution time, waits for the next event to arrive, and each asynchronous I/O request is pushed to the event queue for processing by the program process."Figure" node. JS Schema2nd. Installing and configuring node. jsnode.

Based on the WebSocket communication Implementation of Node. js, node. jswebsocket Node dependency package There are many dependency packages for implementing Websocket in node. Both websocket and ws can be used. This article selects ws for implementation. First install the

the array is called (value).3.key and value are in pairs, called (key-value pairs)Two. Strong type language three characteristics (weak type language "JS" can not be followed, high flexibility):1. The array storage must be continuous;2. The array must specify the length;3. The type of storage must be specifiedThree. Array length1. Strongly typed language: var arr =new Array (5); /* indicates that the array length is 5, understand the content */2. Wea

;Console. log ('B done'); main. js: [javascript] view plaincopyprint?Console. log ('main starting ');Var a = require ('./a. js ');Var B = require ('./B. js ');Console. log ('in main, a. done = % j, B. done = % J', a. done, B. done ); Console. log ('main starting ');Var a = require ('./a. js ');Var B = require ('./B.