All InterstingJavaScript related Questions

i have some process to run in background when people is playing with Node JS Electron Application . so main thread remain untouched , and background process do their job without any leg to main screen. i want to download some server data to process so local application remain up to date . but json data should be downloaded in the background process so main application remain undisturbed so is it possible to run multi threading in Node JS programmed application it should be multi threading in Node JS or multi processing in node.js . so it can share the load of application to scale up the applications by splitting a single thread into multiple thread , is that possible in Node JS

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i found many script which use !function( , exclamation mark before the function , i dont understand why it used. twitter code to embed widget.js have used !function what is use of exclamation mark before the function ? what exclamation mark before the function really do ? is that means dont run function (if ! used for not operator ) or something else use of it ?

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