Narcis

I am interested in the Machine Learning Tutorial of W3Schools: https://www.w3schools.com/python/python_ml_getting_started.asp

Do I need to do the Python tutorial first?

Thank you

I wrote in Terminal:

- npm install create-react-app

I missed -g by error. I wanted to write

-  npm install -g create-react-app

If I want to make the installation global, at this point, what should I do?

I try to learn Node.js and the MsQL connection. I follow this tutorial:

https://www.w3schools.com/nodejs/nodejs_mysql.asp

But when I put that in the Mac Terminal:

node demo_db_connection.js

I get that error:

sqlMessage: 'Client does not support authentication protocol requested by server; consider upgrading MySQL client',

sqlState: '08004',

I tried many things. Please help.

I try to do the Node.js MySQL tutorial. https://www.w3schools.com/nodejs/nodejs_mysql.asp

- I have downloaded MySQL from here: https://dev.mysql.com/downloads/mysql/

- I clicked on the file and installed it.

- Now I have it in my Mac System Preferences > MySQL

- I put that in Terminal: npm install mysql

- In demo_db_connection.js I put

var mysql = require('/Users/myName/node_modules/mysql');

var con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "myPassword"
});

con.connect(function(err) {
  if (err) throw err;
  console.log("Connected!");
});

- Then in Termimal: cd (folder where I have the file)

- node demo_db_connection.js

- It gives me a long error. At the end: 

  code: 'ER_NOT_SUPPORTED_AUTH_MODE',
  errno: 1251,
  sqlMessage: 'Client does not support authentication protocol requested by server; consider upgrading MySQL client',
  sqlState: '08004',
  fatal: true

I remember the password but I am not sure if I get the user right. I tried: localhost, myName, root. Could that be the cause of the error? How to solve it?

In require I put the address where I have the node modules. I am not sure if that is right?

MySQL Community (GPL) downloads goes to more options. I have a Mac. If I want what is the right one to follow the w3Schools Node.js tutorial?

Great. This really helps!

I try to learn Node.js. I have used Mamp and PHP till now. With Mamp I can access to MySql. Is that useful for Node? Probably I am confusing concepts and Mamp does not work with Node. Right? .

In the tutorial of Node.js MySql, it says:

You can download a free MySQL database at https://www.mysql.com/downloads/

This goes to a page with different options. I am an absolute beginner. Should I go to the Trial Download? W3Schools tutorial, says "free" MySQL database. If free why do they talk about trial, if that is the option?

I still do not understand very well that concept of server and "Node running as a process inside the terminal". But thank you, now I can continue and perhaps I will have a more clear idea when I finish the tutorial?

I try to learn Node.js. I followed that tutorial: https://www.w3schools.com/nodejs/nodejs_get_started.asp

As the tutorial says, I created a file: myfirst.js with that content: 

var http = require('http');

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end('Hello World!');
}).listen(8080);

I have a Mac. I open the Terminal and reach that file: Your Name>node myfirst.js

I open a browser and type the address: http://localhost:8080 And I see nothing. Safari says: Safari can't connect to the Server. Similar with other browsers. 

What is wrong?

This means that we should not learn php in W3c? What is a good place for an absolute beginner? (I think php.net is not a good place to learn for a beginner)

In the lasts months I have try to learn php. I really like w3 because explains the things in a very clear an direct way. But now I discover that I should not use mysql, that this is deprecated. More experienced people tell me that I should use mysqli I'm confused, is it true? why W3Schools does not talk about that? When will w3c update that information? Thank you Narcís