When programming, using modules and libraries within our code is a must. As the libraries are written by others, beginners will be confused on what each function and the arguments mean. Throughout this post, we will go through renaming files with Node.js. First, we must grasp the concept of opening a file, so the program knows what file to search for. The following is a simple set of code that will open a file. Open() const fs = require ( 'fs' ); fs . open ( '/open/some/file.txt' , 'r' , ( err , fd ) => { if ( err ) { throw err ; } fs . close ( fd , ( err ) => { i f ( err ) { throw err ; } } ); } ); Let's go through what each part of the code represents. fs is a module that allows access to a physical file system. The fs.open function is called when you want to open a file. The first argument should be the path to the file. The second argument refers t...
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