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If you are doing any form of programming in Javascript then understanding its eventloop is very important. Any javascript engine has three kinds of memory models: Stack, which has the current function pointer an gets executed sequentially. Heap, this stores all the objects, functions basically anything that is initiated is stored here. Queue, all things to be executed is stored here and stack picks up tasks to do from the queue. So, to understand this further, when a function is getting executed its loaded in the stack and if it encounters any setTimeouts then it would be added in the queue and when the current stack gets empty then the new function to be executed from the queue. This code run will explain the process: console.log("Add this code to queue"); setTimeout(function() {                                                //This goes and si...

Sometimes while working on Linux, mysql.sock may get deleted by mistake due to some softwares.. in such cases any access to mysql wont be possible as the sock file defines the socket connection for mysql. It will give an error of the following type: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) In such cases follow these steps to reconfigure mysql: Delete the log files with the names: ib_logfile0, ib_logfile1 and ibdata1 in the /var/lib/mysql directory Then type: "mysqld_safe --user=mysql &" This will automatically create mysql.sock file and even the new logs files. This is a very simple solution which I used recently and decided to share with you people.