DEV Community: Memel Meless

React doc, what's new ?

Memel Meless — Sun, 19 Mar 2023 11:30:29 +0000

Hello javascript fans mainly react users.
I want to share with you what I think is new on React doc now, I mean for React 18.

what you can observe before was, like you have to learn two concepts of react everytime.

In fact React teams in the past promoted class based components, then the new way to build component now recomand fonctional approach. Classes was cool for old users of react, but for new users it was like you are learning thing twice, it was confusing.

Now when you start, you can jump directly into functional component and you'll learn with funny examples.

Another thing is the references to frameworks, today you can find popular frameworks described and included directly in react doc, we can list :

Next.js

Remix

Gatsby

Theres is also a reference to

React native

You can enjoy also with the new design.
Enjoy with react !!!

Use a npm package from your private registry

Memel Meless — Mon, 13 Mar 2023 01:00:27 +0000

Daily as javascript developer, I use npm. most of the time I use packages from public npm registry. It looks like that in my terminal :
npm install my-public-package
and everything is ok.
What happen to me that week, was simple, another department develop a package and push it on our private internal registry.

the first solution was just doing an install from git with a certain ssh .
like this:
npm install -S "git+ssh://<your project git ssh url>"
we will skip this method

another one is to simply setup your npm config, just the followings steps:
update or create an npm config file :
create an .npmrc file in the root of your home : ~/.npmrc

What do you need :

access to the registry : username, password
the registry url
a base64 encoder tool

Now what will be the content of our recently created .npmrc file ?
We add two things : the private registry url and the authentification token, like this :

//my-private-registry-url/:_auth=<token> @scope:registry=<http//:my-private-registry-url>

The scope is the package or the first part of the package, if your package is @john/doe the scope will be @john, we can just say that the scope is the namespace of the package.

Note that is base64 of 'username:password', username and password of your registry.

after this config you can now install your private npm package as usual doing :
npm install @john/doe

That's all, easy and simple, enjoy with your private registry packages.

Test your MongoDB connectivity with mongoose

Memel Meless — Wed, 28 Jul 2021 14:36:46 +0000

I was building an app in which I need to switch database from the UI. In that situation we need to update the parameters of connexion and validate them, we need to test if the connexion can be etablished.

using mongoose

$ npm install mongoose

In your testing code file

const mongoose = require("mongoose");
const server = "127.0.0.1";
const authDb = "admin";
const database = "purgenie";
const user = "memel";
const password = "yourP@ssword";
const port = "127017";

let options  = {};
password = encodeURIComponent(password);
const uri = "mongodb://"+user+":"+password+"@"+server+ ":" +port+"/"+database+"?authSource="+authDb;

mongoose.createConnection(uri, options).then(()=>{
    console.log("Connexion succeed");
}).catch((err) =>{
    console.error(err);
});

Migrate phone number to 10 digits Côte d'Ivoire in JavaScript

Memel Meless — Sun, 28 Mar 2021 22:25:19 +0000

Something very interesting on sunday coding,
I solved my personal problem by translating ARTCI project PNN into javascript.
https://github.com/aurellemeless/cipnn/tree/main
I can now by the web migrate my Côte d'Ivoire contacts.
You can check the repo and add you contributions. comments and commits are welcome.

How to run a MongoDB instance on a specific port and activate authentification?

Memel Meless — Wed, 24 Feb 2021 19:05:29 +0000

Sometimes you need to work on different projects that need MongoDB in differents ports /instances, We have a lot of situations for which that happens but I will not list them here. I faced that situation and I diced to share my experience on it with you.

In this tutorial you will learn how to run a specific instance of MongoDB :

Store the database files in a specific directory
Specify a custom port
Activate authentification by username and password
How to connect from mongo client directly from the terminal

Requirement

Have MongoDB 3.4 or higher installed

Create the directories to persist your data

mkdir /home/memel/data
mkdir /home/memel/data/log

Create a Configuration file

Everything can be done in the config file.
create a file anywhere you want and keep in mind the full path of that file.

Name it externaldb.conf :

touch /home/memel/externaldb.conf

Put content below and adapt it to your need :

systemLog:
   destination: file
# you can put the corresponding path for the log
   path: /home/memel/data/external/log/mongod.log
   logAppend: true
storage:
   journal:
      enabled: true
# you can put the corresponding path to store the DB
   dbPath: /home/memel/data/external
net:
   bindIp: 127.0.0.1
# put the port that you want
   port: 27020
setParameter:
   enableLocalhostAuthBypass: false

From your terminal run the following to lunch your instance :

mongod --config "/home/memel/externaldb.conf"

To check if everything is ok, from you terminal run :

mongo --port 27020

Create a secured account

Select the admin database

use admin

Create a server admin user

db.createUser(
{
user: "sa",
pwd: "your password",
roles: [ { role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ]
})

That user account will manage all the server, I mean all the databases.
you can create a user only for a specific database.

Create a database admin user

Creating a specific account myAppUser that will acceed only your app database myAppDB.

db.createUser(
{
user: "myAppUser",
pwd: "your password",
roles: [ { role: "readWrite", db: "myAppDB" }]
})

You should see a success message, close your terminal.

Connect from mongo client

Now open a new terminal and test if the sa account works, run the next command line

mongo --port 27020  -u sa -p --authenticationDatabase admin

Activate full authentification

Activate the security allow only access by password
you just need to set enableLocalhostAuthBypass to true
your config file should look like this

systemLog:
   destination: file
# you can put the corresponding path for the log
   path: /home/memel/data/external/log/mongod.log
   logAppend: true
storage:
   journal:
      enabled: true
# you can put the corresponding path to store the DB
   dbPath: /home/memel/data/external
net:
   bindIp: 127.0.0.1
# put the port that you want
   port: 27020
setParameter:
   enableLocalhostAuthBypass: true

Enjoy !!!