Idris Brhane

Idris Brhane


 Using ES Modules Instead of CommonJS

It’s been a while since I wrote an article again, so much stuff happen to me back then. It’s doesn’t matter now, I’m back, and ready to write some more!

I’m gonna tell you about NodeJS again, for now, we focus on the NodeJS code and we basically gonna implement ES Modules to our code. For what? Here’s the thing, if you come from the Frontend side and you join to the Backend side, you mostly dealing with ES module in there, if you come from ReactJSAngularJS, or VueJS. You always code using ES Module. But, when you got to the Backend side using NodeJS, you cannot use that kind of code such as importexport default, and export.

In this article, I’m gonna explain to you, how to implement the ES Module in NodeJS version 14. In the previous version of NodeJS below 14, you must set up something or installing a third-party package to use this ES Module and that’s kind of a waste of time, I think.

#api #javascript #expressjs #backend #nodejs

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 Using ES Modules Instead of CommonJS

Why Use WordPress? What Can You Do With WordPress?

Can you use WordPress for anything other than blogging? To your surprise, yes. WordPress is more than just a blogging tool, and it has helped thousands of websites and web applications to thrive. The use of WordPress powers around 40% of online projects, and today in our blog, we would visit some amazing uses of WordPress other than blogging.
What Is The Use Of WordPress?

WordPress is the most popular website platform in the world. It is the first choice of businesses that want to set a feature-rich and dynamic Content Management System. So, if you ask what WordPress is used for, the answer is – everything. It is a super-flexible, feature-rich and secure platform that offers everything to build unique websites and applications. Let’s start knowing them:

1. Multiple Websites Under A Single Installation
WordPress Multisite allows you to develop multiple sites from a single WordPress installation. You can download WordPress and start building websites you want to launch under a single server. Literally speaking, you can handle hundreds of sites from one single dashboard, which now needs applause.
It is a highly efficient platform that allows you to easily run several websites under the same login credentials. One of the best things about WordPress is the themes it has to offer. You can simply download them and plugin for various sites and save space on sites without losing their speed.

2. WordPress Social Network
WordPress can be used for high-end projects such as Social Media Network. If you don’t have the money and patience to hire a coder and invest months in building a feature-rich social media site, go for WordPress. It is one of the most amazing uses of WordPress. Its stunning CMS is unbeatable. And you can build sites as good as Facebook or Reddit etc. It can just make the process a lot easier.
To set up a social media network, you would have to download a WordPress Plugin called BuddyPress. It would allow you to connect a community page with ease and would provide all the necessary features of a community or social media. It has direct messaging, activity stream, user groups, extended profiles, and so much more. You just have to download and configure it.
If BuddyPress doesn’t meet all your needs, don’t give up on your dreams. You can try out WP Symposium or PeepSo. There are also several themes you can use to build a social network.

3. Create A Forum For Your Brand’s Community
Communities are very important for your business. They help you stay in constant connection with your users and consumers. And allow you to turn them into a loyal customer base. Meanwhile, there are many good technologies that can be used for building a community page – the good old WordPress is still the best.
It is the best community development technology. If you want to build your online community, you need to consider all the amazing features you get with WordPress. Plugins such as BB Press is an open-source, template-driven PHP/ MySQL forum software. It is very simple and doesn’t hamper the experience of the website.
Other tools such as wpFoRo and Asgaros Forum are equally good for creating a community blog. They are lightweight tools that are easy to manage and integrate with your WordPress site easily. However, there is only one tiny problem; you need to have some technical knowledge to build a WordPress Community blog page.

4. Shortcodes
Since we gave you a problem in the previous section, we would also give you a perfect solution for it. You might not know to code, but you have shortcodes. Shortcodes help you execute functions without having to code. It is an easy way to build an amazing website, add new features, customize plugins easily. They are short lines of code, and rather than memorizing multiple lines; you can have zero technical knowledge and start building a feature-rich website or application.
There are also plugins like Shortcoder, Shortcodes Ultimate, and the Basics available on WordPress that can be used, and you would not even have to remember the shortcodes.

5. Build Online Stores
If you still think about why to use WordPress, use it to build an online store. You can start selling your goods online and start selling. It is an affordable technology that helps you build a feature-rich eCommerce store with WordPress.
WooCommerce is an extension of WordPress and is one of the most used eCommerce solutions. WooCommerce holds a 28% share of the global market and is one of the best ways to set up an online store. It allows you to build user-friendly and professional online stores and has thousands of free and paid extensions. Moreover as an open-source platform, and you don’t have to pay for the license.
Apart from WooCommerce, there are Easy Digital Downloads, iThemes Exchange, Shopify eCommerce plugin, and so much more available.

6. Security Features
WordPress takes security very seriously. It offers tons of external solutions that help you in safeguarding your WordPress site. While there is no way to ensure 100% security, it provides regular updates with security patches and provides several plugins to help with backups, two-factor authorization, and more.
By choosing hosting providers like WP Engine, you can improve the security of the website. It helps in threat detection, manage patching and updates, and internal security audits for the customers, and so much more.

Read More

#use of wordpress #use wordpress for business website #use wordpress for website #what is use of wordpress #why use wordpress #why use wordpress to build a website

Josefa  Corwin

Josefa Corwin


Mailboxer: A Rails Gem to Send Messages inside A Web Application


This project is based on the need for a private message system for ging / social_stream. Instead of creating our core message system heavily dependent on our development, we are trying to implement a generic and potent messaging gem.

After looking for a good gem to use we noticed the lack of messaging gems and functionality in them. Mailboxer tries to fill this void delivering a powerful and flexible message system. It supports the use of conversations with two or more participants, sending notifications to recipients (intended to be used as system notifications “Your picture has new comments”, “John Doe has updated his document”, etc.), and emailing the messageable model (if configured to do so). It has a complete implementation of a Mailbox object for each messageable with inbox, sentbox and trash.

The gem is constantly growing and improving its functionality. As it is used with our parallel development ging / social_stream we are finding and fixing bugs continously. If you want some functionality not supported yet or marked as TODO, you can create an issue to ask for it. It will be great feedback for us, and we will know what you may find useful in the gem.

Mailboxer was born from the great, but outdated, code from lpsergi / acts_as_messageable.

We are now working to make exhaustive documentation and some wiki pages in order to make it even easier to use the gem to its full potential. Please, give us some time if you find something missing or ask for it. You can also find us on the Gitter room for this repo. Join us there to talk.


Add to your Gemfile:

gem 'mailboxer'

Then run:

$ bundle install

Run install script:

$ rails g mailboxer:install

And don't forget to migrate your database:

$ rake db:migrate

You can also generate email views:

$ rails g mailboxer:views


If upgrading from 0.11.0 to 0.12.0, run the following generators:

$ rails generate mailboxer:namespacing_compatibility
$ rails generate mailboxer:install -s

Then, migrate your database:

$ rake db:migrate

Requirements & Settings


We are now adding support for sending emails when a Notification or a Message is sent to one or more recipients. You should modify the mailboxer initializer (/config/initializer/mailboxer.rb) to edit these settings:

Mailboxer.setup do |config|
  #Enables or disables email sending for Notifications and Messages
  config.uses_emails = true
  #Configures the default `from` address for the email sent for Messages and Notifications of Mailboxer
  config.default_from = ""

You can change the way in which emails are delivered by specifying a custom implementation of notification and message mailers:

Mailboxer.setup do |config|
  config.notification_mailer = CustomNotificationMailer
  config.message_mailer = CustomMessageMailer

If you have subclassed the Mailboxer::Notification class, you can specify the mailers using a member method:

class NewDocumentNotification < Mailboxer::Notification
  def mailer_class

class NewCommentNotification < Mailboxer::Notification
  def mailer_class

Otherwise, the mailer class will be determined by appending 'Mailer' to the mailable class name.

User identities

Users must have an identity defined by a name and an email. We must ensure that Messageable models have some specific methods. These methods are:

#Returning any kind of identification you want for the model
def name
  return "You should add method :name in your Messageable model"
#Returning the email address of the model if an email should be sent for this object (Message or Notification).
#If no mail has to be sent, return nil.
def mailboxer_email(object)
  #Check if an email should be sent for that object
  #if true
  return "define_email@on_your.model"
  #if false
  #return nil

These names are explicit enough to avoid colliding with other methods, but as long as you need to change them you can do it by using mailboxer initializer (/config/initializer/mailboxer.rb). Just add or uncomment the following lines:

Mailboxer.setup do |config|
  # ...
  #Configures the methods needed by mailboxer
  config.email_method = :mailboxer_email
  config.name_method = :name
  config.notify_method = :notify
  # ...

You may change whatever you want or need. For example:

config.email_method = :notification_email
config.name_method = :display_name
config.notify_method = :notify_mailboxer

Will use the method notification_email(object) instead of mailboxer_email(object), display_name for name and notify_mailboxer for notify.

Using default or custom method names, if your model doesn't implement them, Mailboxer will use dummy methods so as to notify you of missing methods rather than crashing.

Preparing your models

In your model:

class User < ActiveRecord::Base

You are not limited to the User model. You can use Mailboxer in any other model and use it in several different models. If you have ducks and cylons in your application and you want to exchange messages as if they were the same, just add acts_as_messageable to each one and you will be able to send duck-duck, duck-cylon, cylon-duck and cylon-cylon messages. Of course, you can extend it for as many classes as you need.


class Duck < ActiveRecord::Base
class Cylon < ActiveRecord::Base

Mailboxer API

Warning for version 0.8.0

Version 0.8.0 sees Messageable#read and Messageable#unread renamed to mark_as_(un)read, and Receipt#read and Receipt#unread to is_(un)read. This may break existing applications, but read is a reserved name for Active Record, and the best pratice in this case is simply avoid using it.

How can I send a message?

#alfa wants to send a message to beta
alfa.send_message(beta, "Body", "subject")

How can I read the messages of a conversation?

As a messageable, what you receive are receipts, which are associated with the message itself. You should retrieve your receipts for the conversation and get the message associated with them.

This is done this way because receipts save the information about the relation between messageable and the messages: is it read?, is it trashed?, etc.

#alfa gets the last conversation (chronologically, the first in the inbox)
conversation = alfa.mailbox.inbox.first

#alfa gets it receipts chronologically ordered.
receipts = conversation.receipts_for alfa

#using the receipts (i.e. in the view)
receipts.each do |receipt|
  message = receipt.message
  read = receipt.is_unread? #or message.is_unread?(alfa)

How can I reply to a message?

#alfa wants to reply to all in a conversation
#using a receipt
alfa.reply_to_all(receipt, "Reply body")

#using a conversation
alfa.reply_to_conversation(conversation, "Reply body")
#alfa wants to reply to the sender of a message (and ONLY the sender)
#using a receipt
alfa.reply_to_sender(receipt, "Reply body")

How can I delete a message from trash?

#delete conversations forever for one receipt (still in database)

#you can mark conversation as deleted for one participant
conversation.mark_as_deleted participant

#Mark the object as deleted for messageable
#Object can be:
  #* A Receipt
  #* A Conversation
  #* A Notification
  #* A Message
  #* An array with any of them
alfa.mark_as_deleted conversation

# get available message for specific user

How can I retrieve my conversations?

#alfa wants to retrieve all his conversations

#A wants to retrieve his inbox

#A wants to retrieve his sent conversations

#alfa wants to retrieve his trashed conversations

How can I paginate conversations?

You can use Kaminari to paginate the conversations as normal. Please, make sure you use the last version as mailboxer uses select('DISTINCT conversations.*') which was not respected before Kaminari 0.12.4 according to its changelog. Working correctly on Kaminari 0.13.0.

#Paginating all conversations using :page parameter and 9 per page
conversations =[:page]).per(9)

#Paginating received conversations using :page parameter and 9 per page
conversations =[:page]).per(9)

#Paginating sent conversations using :page parameter and 9 per page
conversations =[:page]).per(9)

#Paginating trashed conversations using :page parameter and 9 per page
conversations =[:page]).per(9)

You can take a look at the full documentation for Mailboxer in

Do you want to test Mailboxer?

Thanks to Roman Kushnir (@RKushnir) you can test Mailboxer with this sample app.

I need a GUI!

If you need a GUI you should take a look at these links:


Author: mailboxer
Source code:
License: MIT license

#ruby  #ruby-on-rails 

Nat  Grady

Nat Grady


Wordcloud2: R interface to Wordcloud for Data Visualization


R interface to wordcloud for data visualization. Timdream's wordcloud2.js is used in this package.

Original description



knitr and shiny is support in wordcloud2 package.


wordcloud2(demoFreq, size = 1,shape = 'star')


wordcloud2(demoFreq, size = 2, minRotation = -pi/2, maxRotation = -pi/2)


wordcloud2(demoFreq, size = 2, minRotation = -pi/6, maxRotation = -pi/6,
  rotateRatio = 1)


Chinese version

## Sys.setlocale("LC_CTYPE","eng")
wordcloud2(demoFreqC, size = 2, fontFamily = "微软雅黑",
           color = "random-light", backgroundColor = "grey")


Example of successfully deploying interactivate clickable wordcloud with special shape on R-shiny

Thanks JacobXPX's contribution to this feature:

Thanks AdamSpannbauer for pointing out the issues.

Additional features are added or modified:

hover information display are fixed, refering AdeelK93's previous work, thanks!

multiple wordclouds which seperatedly click are supported.

clickedWordInputId is changed to be automatically generated by: paste0(outputId, "_clicked_word")).

See sample below for more details:

    #using default clicked word input id
    wordcloud2Output("my_wc", width = "50%", height = "400px"),
    #using custom clicked word input id
    wordcloud2Output("my_wc2", width = "50%", height = "400px"),
    figPath = system.file("examples/a.png",package = "wordcloud2")
    output$my_wc  = renderWordcloud2(wordcloud2(data = demoFreq, figPath = figPath, size = 0.4,color = "blue"))
    output$my_wc2 = renderWordcloud2(wordcloud2(demoFreq))
    #using default clicked word input id
    output$print  = renderPrint(input$my_wc_clicked_word)
    #using custom clicked word input id
    output$print2 = renderPrint(input$my_wc2_clicked_word)

run the above code and click refresh, it will work.



Download Details:

Author: Lchiffon
Source Code: 

#r #datavisualization 

Ray  Patel

Ray Patel


Top 20 Most Useful Python Modules or Packages

 March 25, 2021  Deepak@321  0 Comments

Welcome to my blog, In this article, we will learn the top 20 most useful python modules or packages and these modules every Python developer should know.

Hello everybody and welcome back so in this article I’m going to be sharing with you 20 Python modules you need to know. Now I’ve split these python modules into four different categories to make little bit easier for us and the categories are:

  1. Web Development
  2. Data Science
  3. Machine Learning
  4. AI and graphical user interfaces.

Near the end of the article, I also share my personal favorite Python module so make sure you stay tuned to see what that is also make sure to share with me in the comments down below your favorite Python module.

#python #packages or libraries #python 20 modules #python 20 most usefull modules #python intersting modules #top 20 python libraries #top 20 python modules #top 20 python packages

¿Qué Es Ansible? Una Herramienta Para Automatizar Partes De Su Trabajo

Hola a todos, hoy hablaremos de Ansible, una fantástica herramienta de software que permite automatizar el soporte informático multiplataforma de una forma sencilla pero eficaz.

¿Qué es Ansible?

Ansible es una herramienta que genera instrucciones escritas para automatizar el trabajo de los profesionales de TI en toda la infraestructura del sistema.

Está diseñado especialmente para los profesionales de TI que lo utilizan para la implementación de aplicaciones, la gestión de la configuración, la orquestación dentro del servicio y prácticamente cualquier otra cosa que un administrador de sistemas haga de forma semanal o diaria.

Ansible es fácil de instalar porque no requiere ningún software de agente u otra infraestructura de seguridad.

Si bien Ansible está a la vanguardia de la automatización, la administración de sistemas y DevOps, también es valiosa como herramienta para que los desarrolladores la utilicen en su trabajo diario.

Ansible le permite configurar no solo una máquina, sino una red completa de todas a la vez, y no requiere ningún conocimiento de programación.

¿Cómo funciona Ansible?

Ansible se conecta a nodos en una red (clientes, servidores, etc.) y luego envía un pequeño programa llamado módulo Ansible a cada nodo.

Luego ejecuta estos módulos a través de SSH y los elimina una vez que están listos.

Su nodo de control de Ansible debe tener acceso de inicio de sesión a los nodos administrados para que esta interacción funcione.

El método de autenticación más frecuente son las claves SSH, pero también se permiten métodos alternativos.

Si desea ver cómo instalar y comenzar a usar Ansible, lo cubriremos a continuación.

Arquitectura de Ansible

Ahora echemos un vistazo a la arquitectura de Ansible y cómo administra las operaciones.

Complementos de Ansible

Los complementos son piezas de código complementarias que mejoran la funcionalidad, y probablemente los haya utilizado en muchas otras herramientas y plataformas. Puede utilizar los complementos integrados de Ansible o crear los suyos propios.

Ejemplos son:

  • Complementos de acción
  • Conviértete en complementos
  • Complementos de caché
  • Complementos de devolución de llamada
  • Complementos Cliconf
  • Complementos de conexión
  • Complementos de API HTTP
  • Complementos de inventario
  • Complementos de búsqueda
  • Complementos de Netconf
  • Pruebas

Módulos Ansible

Los módulos son programas cortos que Ansible distribuye a todos los nodos o hosts remotos desde una estación de trabajo de control central. Los módulos controlan cosas como servicios y paquetes y se pueden ejecutar a través de libros de jugadas.

Ansible ejecuta todos los módulos necesarios para instalar actualizaciones o completar cualquier operación que sea necesaria y luego los elimina una vez que han terminado.

Inventarios Ansible

Ansible usa un archivo de inventario para rastrear qué hosts son parte de su infraestructura y luego accede a ellos para ejecutar comandos y guías.

Ansible trabaja en paralelo con varios sistemas en su infraestructura. Para ello, selecciona los métodos mencionados en el archivo de inventario de Ansible, que se guarda en la ubicación del host de forma predeterminada.

Una vez que el inventario está registrado, puede usar un archivo de texto simple para asignar variables a cualquiera de los hosts y puede recuperar el inventario de una variedad de fuentes.

Libro de jugadas de Ansible

Los profesionales de TI pueden utilizar los manuales de Ansible para programar aplicaciones, servicios, nodos de servidor y otros dispositivos sin tener que empezar de cero. Los libros de jugadas de Ansible, junto con las condiciones, variables y tareas incluidas en ellos, se pueden almacenar, compartir y reutilizar para siempre.

Los libros de jugadas de Ansible funcionan de manera similar a los manuales de tareas. Son archivos YAML simples , un lenguaje de serialización de datos legible por humanos.

Los libros de jugadas son la esencia de lo que hace que Ansible sea tan popular. Especifican actividades que se pueden completar rápidamente sin requerir que el usuario conozca o recuerde ninguna sintaxis específica.

Beneficios de usar Ansible

  • Ansible es rápido y fácil de usar, ya que ejecuta todas sus operaciones a través de SSH y no requiere la instalación de ningún agente.
  • Ansible es una herramienta gratuita de código abierto y fácil de configurar y usar: los libros de jugadas de Ansible no requieren ningún conocimiento especial de codificación.
  • Ansible se puede utilizar para realizar tareas sencillas, como asegurarse de que un servicio esté funcionando o reiniciarse desde la línea de comandos sin la necesidad de archivos de configuración.

En un sistema más extenso o más uniforme, Ansible puede encajar mejor. También proporciona un conjunto de módulos para administrar varios métodos e infraestructura en la nube.

¿Por qué es tan importante Ansible?

La modernización y la transformación digital requieren una automatización que sea necesaria y decidida. Necesitamos una nueva solución de gestión en los contextos dinámicos actuales para aumentar la velocidad, la escala y la estabilidad en toda la infraestructura de TI.

La tecnología es nuestro instrumento más potente para la mejora de productos. Anteriormente, lograr esto requería una cantidad significativa de trabajo manual y una coordinación compleja. Pero hoy, Ansible, un motor de automatización de TI simple pero poderoso utilizado por miles de empresas para simplificar sus configuraciones y acelerar las operaciones de DevOps, está disponible.

Cómo instalar Ansible en Ubuntu

Ejecute los siguientes comandos para configurar el PPA en su máquina e instalar Ansible:

Actualiza el repositorio:

sudo apt-get update

Instale las propiedades del software:

sudo apt-get install software-properties-common

Y luego instale Ansible así:

sudo apt-add-repository --yes --update ppa:ansible/ansible

Entonces ejecuta esto:

sudo apt-get install ansible

Debería tener algo similar a lo que se muestra a continuación:


Ahora que ha instalado Ansible con éxito, probemos si está funcionando usando el siguiente comando:

ansible --version


Usaremos el comando a continuación para indicarle a Ansible que apunte a todos los sistemas para el host de inventario localhost, y ejecutaremos el ping del módulo desde su consola local (en lugar de ssh).

ansible all -i localhost, --connection=local -m ping

Debería obtener una respuesta similar a la que puede ver a continuación:


Cómo modificar los hosts a los que se dirige Ansible

Realizaremos cambios en el archivo del host en formato /etc/ansible/hosts. Este es el archivo predeterminado donde Ansible busca cualquier host (y grupo) definido donde los comandos dados deben ejecutarse de forma remota.

sudo nano /etc/ansible/hosts

Agregue las líneas siguientes al archivo y guarde las modificaciones:


Ejecute este comando con su archivo de inventario ajustado:

ansible all --connection=local -m ping

La respuesta debería ser similar a la que tenemos a continuación:


Cómo configurar un servidor remoto

Implementamos nuestro programa de prueba Ansible en nuestro servidor remoto usando una gota de Digital Ocean.

Utilice el siguiente comando para ingresar al servidor mediante SSH:

ssh username@IP_Address

Nota: ya hemos configurado una clave ssh en nuestro perfil, que se seleccionó al crear el droplet.


Cómo configurar Ansible para un servidor remoto

Editaremos nuestro archivo de hosts en / etc / ansible / hosts usando el siguiente comando:

sudo nano /etc/ansible/hosts

Agregue las líneas siguientes al archivo y guarde las modificaciones:



Para ver si Ansible puede conectarse a su instancia de computación remota a través de SSH, escriba el siguiente comando:

ansible remote -m ping


Crearemos un libro de jugadas de Ansible usando el comando a continuación, que es la forma típica de decirle a Ansible qué comandos ejecutar en el servidor remoto y en qué orden. El libro de jugadas está escrito en .yml y sigue un formato estricto.

En la documentación oficial de Ansible , puede obtener más información sobre los libros de jugadas.

nano my-playbook.yml

Agregue el siguiente código, que le dice a Ansible que instale Docker en varios pasos:

- name: install docker
hosts: remote
become_method: sudo
become_user: root
vars: #local variables
- apt-transport-https
- ca-certificates
- curl
- software-properties-common

- name: Update apt packages
become: true #make sure you execute the task with sudo privileges
apt: #use apt module
update_cache: yes #equivalent of apt-get update

- name: Install packages needed for Docker
become: true
name: "{{ docker_packages }}" #uses our declared variable docker_packages
state: present #indicates the desired package state
force_apt_get: yes #forces to use apt-get

- name: Add official GPG key of Docker
shell: curl -fsSL | sudo apt-key add -

- name: Save the current Ubuntu release version into a variable
shell: lsb_release -cs
register: ubuntu_version #Output gets stored in this variable

- name: Set right Docker directory
become: true
shell: add-apt-repository "deb [arch=amd64] {{ ubuntu_version.stdout }} stable"

- name: Update apt packages
become: true
update_cache: yes

- name: Install Docker
become: true
name: docker-ce
state: present
force_apt_get: yes

- name: Test Docker with hello world example
become: true
shell: docker run hello-world
register: hello_world_output

- name: Show output of hello word example
debug: #use debug module
msg: "Container Output: {{hello_world_output.stdout}}"

Ahora podemos ejecutarlo con el siguiente comando:

ansible-playbook my-playbook.yml -l remote

Después de eso, veremos que ocurre algo de magia (puede llevar un tiempo), y en algún lugar del último mensaje de depuración en nuestra terminal, deberíamos ver "¡Hola desde Docker!"


En este artículo, analizamos en detalle Ansible, sus beneficios, cómo funciona y qué puede hacer, su arquitectura, complementos, manual de estrategias, inventario y cómo configurar e implementar Docker con Ansible en un servidor remoto.

¡Gracias por leer!