Complete Note.js Developer Course Workflow

Along with basic node.js practice

-node engine can create much faster machine code ( v8 engine )

-node is a js runtime that uses the v8 engine, v8 is written in c++

-v8 converts the code to machine code

-learned about using arguments/user inputs as process.argv and yargs

-const argv = yargs.argv is one of the best way for user input argument parsing

-var command = process.argv[2] or alternative way is: var command = argv._[0];

-using filesystem to read and write json file along with converting json/string

-using simple array, notes as json data added to a file and also checked if the file has duplicate notes or not

-modified previous version of code with re-usable functions and in a proper way to handle error messages

-basically creating and saving notes has been done properly

-remove a single note funtion - understanding this function, here (note) is not any variable or anything else, it defines individual items in the array:

var filteredNotes = notes.filter((note) => note.title != title);

-also they are alternatives between them:

	var filteredNotes = notes.filter((note) => note.title != title);

is same as: var filteredNotes = notes.filter((note) => { return note.title != title; });

-need to get used to this: the first variable returns a boolean(true or false), the next is taking some decisions depending on that boolean.

	var noteRemoved = notes.removeNote(argv.title);
	var message = noteRemoved ? 'Note was Removed' : 'Note not found';

-if the boolean is true first value is set, otherwise it will be the another one

-read a single note from a title arguments works fine

filter method always returns an array