teleren/devto huggingface dataset:
Trial periods... Are they worth it? - part 3
Tags: webdev, podcast, discuss
Published: 2021-12-24 13:35:03

Hello everyone, it's me again with an update on my free trial experience for my [entrepreneurs virtual co-working space](https://wannabe-entrepreneur.com/coworking). Make sure to check [part 1](https://dev.to/wbepodcast/trial-periods-are-they-really-worth-it-en6) and [part 2](https://dev.to/wbepodcast/trial-periods-are-they-worth-it-part-2-5078) for a bit more context.

It's been three days since I started this experience, which I realize now might be too short of a period to actually make relevant conclusions... But I will make them anyway XD

**In these three days six people have joined the trial period for the community**

To put things in perspective, since I started the WBE space, between one and two new paying members have joined us every week. This means that implementing the trial period **increased the conversion by 300%**.

Even though these are non-paying members at first glance it seems like a promising result. However, it is not working out...

**My intuition was right!**

As you probably remember, I was always a little bit against giving access for free to the community because it is a safe place where entrepreneurs can speak about their vulnerabilities and support each other. **We have members that have even already met in person!**

Removing the paywall means that people can join without any prior commitment and actually damage this trust that we have built.

**From the six people that joined only one has actually been active.** The others have completely ghosted us and because of that, it feels we can not trust them and be authentic in the groups.

**No more free trial!**

I have decided to stop this free trial experiment and implement a *Money Back Guarantee Policy* for the first thirty days. I know that this offers a bit more resistance for people to join but in this case, this is actually my method to keep the community a safe and cozy place for bootstrappers!

I hope you found this post valuable and if you are more of a podcast kind of person I have talked about it in [episode 175](https://wannabe-entrepreneur.com/episodes/175/).

Cheers
Node js

Published: 2021-12-24 14:50:43


MySQL
Relational database my SQL is a structured or organize based database. there are tables, columns, rows. In there, objects are represented by tables and fields are represented by columns, and records are represented by rows.it is an open-source database management system and it is available for free to anyone. It stores and provides data that related to one another 
 Ex:
  
Table Name: Bijoy(Fall) 
ID ( Primary key)
Description
Section
 Dept


Table Name: Student 

ID(Primary Key)
Name
Email
Phone no



Express:
Express is a node.js  framework or a library. Express was released in November 2010 and the recent version is 4.17.1of the API. express.js is called connect because it is based on the node.js middleware module which uses the http module.it makes web applications fast and easy. We can easily configure and customize it. We can define an error handling middleware. we can easily connect it with MongoDB or my SQL.

Ex:
const express = require('express');
const app = express();
const port = 3000;

app.get('/', function(req, res) {
  res.send('express code')
});

app.listen(port, function() {
  console.log(`example of express in node.js`)
});

JWT

Jwt token ( JSON web token) provides a Secure authentication system based on JSON data. Those JSON data are encrypted and when it goes into work it contains user information to recognize users if requests are from valid users or not.

Example : NTNv7j0TuYARvmNMmWXo6fKvM4o6nv/aUi9ryX38ZH+L1bkrnD1ObOQ8JAUmHCBq7Iy7otZcyAagBLHVKvvYaIpmMuxmARQ97jUVG16Jkpkp1wXOPsrF9zwew6TpczyHkHgX5EuLg2MeBuiT/qJACs1J0apruOOJCg/gOtkjB4c= {

  "sub": "1234567890",
  "name": "John Doe",
  "admin": true,
  "iat": 1640355114,
  "exp": 1640358714
}
Artículos — Dic.
Published: 2021-12-24 13:34:11

Te compartimos los artículos a nivel mundial sobre los temas de Inteligencia Artificial y Big Data 👨‍💻👩‍💻.
✅[Big Data Marketing: Una aproximación]
(http://www.scielo.org.bo/scielo.php?script=sci_arttext&pid=S1994-37332015000100007)
✅[P'Open Banking,un servicio que apalanca la democratización del sistema financiero]
(https://www.larepublica.co/finanzas/open-banking-es-un-servicio-que-apalanca-democratizacion-del-sistema-financiero-3269125)
✅[Usamos big data para ver los productos más buscados en la plataforma de Frubana]
(https://www.larepublica.co/internet-economy/usamos-el-big-data-para-ver-los-productos-mas-buscados-en-la-plataforma-de-frubana-3230770)
✅[Usamos big data para ver los productos más buscados en la plataforma de Frubana]
(https://www.larepublica.co/internet-economy/usamos-el-big-data-para-ver-los-productos-mas-buscados-en-la-plataforma-de-frubana-3230770)
✅[Machine learning reveals brain networks involved in child aggression]
(https://www.technology.org/2021/10/27/machine-learning-reveals-brain-networks-involved-in-child-aggression/)

Aprende, aplica y crece en proyectos de Data y Analytics en Cloud.

Visita nuestra página:
👉🌐 www.datapath.ai

Visitanos en nuestras redes:
✅https://go.datapath.ai/Facebook
✅https://go.datapath.ai/YouTube
✅https://go.datapath.ai/LinkedIn
✅https://go.datapath.ai/Instagram

Únete a nuestra comunidad: 

Telegram
https://t.me/joinchat/vy1BQ9eFt543MWJh

WhatsApp
https://chat.whatsapp.com/GsH3GzEWOSY4gI7is8KiDZ

👉 https://go.datapath.ai/Info

Aprende, Aplica y Crece en áreas de Data, Analytics y Cloud
datapath.ai

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/watub8lnnletfkqyibfy.png)
Cyber Security Online Training in Hyderabad 
Published: 2021-12-24 10:22:07




"India's Cyber Security market is projected to develop to $35.5 billion by 2025. Network safety specialists are attracting pay rates the scope of 7-24 lakhs." - (Source). The term Cyber Security has turned into a question of worldwide interest and significance. As, organizations and associations, particularly the individuals who are given the obligation to protect data identifying with public safety, monetary records, licensed innovation, or wellbeing, need to find critical ways to shield this data from the volume and complexity of digital assaults. Associations today need to accomplish advanced change without thinking twice about security. They are focusing on to ensure delicate information by employing Cyber Security staff to shield their association from security provisos and future assaults. [cyber security training in Hyderabad](https://hkrtrainings.com/cyber-security-training-hyderabad) includes different instruments, hazard the board approaches, and best practices intended to shield networks from assaults or precluded admittance.
What is about Imgupscaler?
Tags: software
Published: 2021-12-24 14:43:00


**Imgupscaler **is a free web-based photo upscaling application, specializing in upscaling bulk images without sacrificing the original quality. It use Super-resolution technology to upscale any image to 4k automatically. It is possible to upscale face portraits, animal photos, as well as anime and cartoon screens. 
 
Key Features of **Imgupscaler**:
•	Enlarge photos to 4K without losing quality.
•	Support multiple types of photos, face portrait, animal photo, anime, cartoon, old photo...
•	Finish the upscaling process automatically. It usually takes 5-10 seconds to do the work.
•	No photo editing skills required. You get 4K photo in simple clicks. (upload, start, download)
•	Integrated photo upscaling and enhancing technology.
•	Batch upscaling and Batch downloading.
•	Brief layout and clear navigation: friendly for all users.
•	Support upscaling max 10 images for a free account per week.

Website url: https://imgupscaler.com/
[]
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/6yig3rrppu1hcqbvstn1.png)url)https://drive.google.com/file/d/1gAe9pPA3fLKgdRyvvSQ1wSxsp860LdkB/view?usp=sharing
Computer Generated Geometrics in less than 30 lines of code!
Tags: showdev, javascript
Published: 2021-12-24 14:33:34

**A combination of variety of geometrics can be cool and fun.
While generating it may seem like a tough task, one can actually experience the geometrics combo with less than 30 lines of code!**

## Set Up
The program uses [p5.js](https://p5js.org) for rendering.

## How Does The Program Work?

* The program generates a random number from 0 to 100 and assign it to a variable n.

* The program loops n times, and with every iteration it
initializes 7 variables:
The first two are width and height, the second two are x and y, and the last three are random RGB (Red, Green and Blue) values.

* Lastly, it draws a rectangle with the specified arguments.


## Full Code
```
function setup() {
    const CANAVS_WIDTH = 400;
    const CANVAS_HEIGHT = 600;

    createCanvas(CANAVS_WIDTH, CANVAS_HEIGHT);

    background(random(255), random(255), random(255));

    const n = random(100);

    for (i = 0; i < n; i++) {
        const w = random(CANAVS_WIDTH);
        const h = random(CANVAS_HEIGHT);

        const x = random(CANAVS_WIDTH);
        const y = random(CANVAS_HEIGHT);

        const r = random(255);
        const g = random(255);
        const b = random(255);

        fill(r, g, b);
        rect(x, y, w, h);
    } 
}
```
Backend
Published: 2021-12-24 14:09:25

 CRUD Operations?
	
	CRUD Meaning: CRUD is an acronym that comes from the world of computer programming and refers to the four functions that are considered necessary to implement a persistent storage application: create, read, update and delete.


JWT?

	JWT, or JSON Web Token, is an open standard used to share security information between two parties — a client and a server. Each JWT contains encoded JSON objects, including a set of claims. JWTs are signed using a cryptographic algorithm to ensure that the claims cannot be altered after the token is issued.


Mongoose?

	To save the data into the database, we need to create a new instance of our model that we created early. We will pass into this instance the user's input. Once we have it then we just need to enter the command “save”. Mongoose will return a promise on a save to the database.


 Relational database (MySql)?

	MySQL is an open-source relational database management system (RDBMS). A relational database organizes data into one or more data tables in which data types may be related to each other; these relations help structure the data.


Aggregation?

	In database management, an aggregate function or aggregation function is a function where the values of multiple rows are grouped together to form a single summary value. Common aggregate functions include: Average (i.e., arithmetic mean) Count. Maximum.
What is Content Marketing?
Published: 2021-12-24 10:20:37

Content marketing is a different method for offering information to customers as well as audience members, and it can serve many purposes within the world of marketing via digital. It is a simple concept: it is the process of creating collateral or other materials for information and distribution of them via various internet-based networks. Above all content marketing must trigger something of a specific decision. A CTA or calls to action is typically found at the bottom of every article. If the content is effective and your reader was satisfied, then it’s likely that they will respond to your request whether it’s to click the link and send an email, or go back and read the article.

The concept of content marketing, or at the very least good content marketing, has to do numerous things. The first is that it must be useful and relevant to the audience you’re providing it to. It is important for them to engage with it, be enthused with it, and ultimately be able to use it. Perhaps it can solve issues for them. Whatever the reason it has to be meaningful to the person reading it.

It must also be used to achieve a specific goal. Perhaps businesses make use of content to promote their brand. Some use it to establish themselves as thought-leaders within their industry through sharing knowledge they’ve learned from their work. You may be trying to get first on the search results when your ideal clients are seeking assistance. It’s your responsibility to determine the goal you want to accomplish with the content you create. It’s not easy to make mistakes however content marketing can propel you in the right direction.

Thirdly, it’s really helpful to ensure that the content you produce is enjoyable, at least on a certain degree. People are expected to interact with the content you’re creating and we all love being entertained. If we’re learning and having fun then that’s even better. Make sure your content is something that viewers are eager to read or watch and you’ll notice it typically does better.
Essential cmd commands for windows users
Tags: cmd, powershell, windows, cli
Published: 2021-12-24 13:54:15

### Check System Information
```
systeminfo
```
### Check Date
```
date
date /t
```
### Check Time
```
time
time /t
```
### Change Drive
```
c:
d:
e:
f:
```
### Check Current Directory
```
dir
```
### Clear Command Screen
```
cls
```
### Change Directory
```
cd [directory/folder name]
cd ../ --> One step back 
cd ../../ --> 2 step back
```
### Create Directory
```
mkdir [diretory name]
```
### Delete Directory
```
rmdir [directory name]
```
### Create an Empty File
```
type nul > [file name]
```
### Rename a File
```
re [file name] [new file name]
rename [file name] [new file name]
```
### Edit File Using Notepad
```
notepad [file name]
```
### Copy Text from a File to Another File
```
copy [first file name] [second file name]
```
### Delete a File
```
del [file name]
erase file name
```
### Move a File
```
move [file name] [new path name]
```
### Display Contents of a File
```
type [file name]
```
JavaScript is a single threaded "Synchronous", What does that mean?!
Tags: javascript, react, angular, vue
Published: 2021-12-24 13:48:00

Hello everyone, in this article I will give you the mean of **single threaded javascript**.

First, let's talk about the **JavaScript engine** in brief way.

A `JavaScript engine` is a software component that executes JavaScript code, Its consists of many steps and components to allow it perform it's tasks.

The two main important things in this step are: 

**1-** We need to store and write information/data for our application (variables, objects, etc..).

**2-** We need to keep track of what's happening to our code line by line.

This is where a `Call stack` and `Memory heap` comes in.

This image explain this two component in graphical way :

![Memory heap and call stack](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/766bridbz6pyjqjwr4u4.jpg)

**1.** Call stack: 

Help to know where we are in the code and to keep track of its place in a script that calls multiple functions — what function is currently being run and what functions are called from within that function, etc.
To know more about call stack and how it is work exactly, I recommend <a href="https://developer.mozilla.org/en-US/docs/Glossary/Call_stack">this tutorial</a>  for you.

**2.** Memory heap:

The memory heap, also called the ‘heap’, is a section of unstructured memory that is used for the allocation of objects and variables, so it is where our variables and functions stores Briefly.
To deep in heap from <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Memory_Management">here</a>

After that, back to our main subject, **"Javascript is a single threaded programming language"** which means it has only one call stack that is used to execute the program, so one set of instructions is executed at a time, it's not doing multiple things.
And because of that JavaScript is **Synchronous**.

So if you understand what is single threaded means, it's the same concept with Synchronous JavaScript **"one thing at a time"**.

This approach of programming lead to make many problems, so the direction now to use another way of JavaScript called **"Asynchronous"** programming.
I will make to it another article in the come in days.

Hope you clearly understand this important concepts as a JavaScript developer! 🙌🌹 

- Ahmad Mukahal
What is JSX?

Published: 2021-12-24 13:41:14


JSX can best be thought of as a markup syntax that very closely resembles HTML.
React is a library which uses JavaScript functions to generate strings of HTML it inserts into a web page document’s body.
JSX makes writing React components, the building blocks of React UI, easier by making the syntax developers use for generating these strings of HTML almost identical to the HTML they will inject into the web page.
Babel parses JSX syntax, which browsers cannot understand, and transpiles your source code into JavaScript that is less human friendly but will run in browsers.
In react, app JSX babel preset will transform these expressions into actual Javascript code. Babel is typically used and recommended for transforming JSX expression.
//JSX 
return <div className="title">    
		 <h1>Hello World!</h1> 
	   </div> 
This is a simple JSX code inside the React component return method.
//Transform into Javascript code return React.createElement(  "div",  null,  React.createElement("h1", { class: "title" }, "Hello World!") ); 
In this way react babel preset transform JSX code into javascript code. After import, React create an element like JSX code using the createElement method The createElement accepts three-parameter first one for tag name as like HTML tag and second one attribute and last one for children.

_
Trial periods... Are they worth it? - part 2
Tags: devjournal, podcast, webdev
Published: 2021-12-24 13:33:34

**Quick Recap**

So a few days back I told you about my initial experience with trial periods in my [entrepreneurs community](https://wannabe-entrepreneur.com/coworking). 

You can read the previous post [here](https://dev.to/wbepodcast/trial-periods-are-they-really-worth-it-en6)

I finish the previous post telling you that I did not know if the trial periods were actually going to work because it had been 8 hours since it was live and nothing had happened.  I know that 8 hours is not a lot but as a bootstrapper living from his savings every minute counts!!!

**Beautiful Morning**
I normally do this posts before bed because there is nothing better than waking up with 2 likes in a post! XD (gives you the motivation to get a job)

Anyway, I was surprised to notice that there were two new trial members! And not long after that one more joined us!
24 hours later and 4 new members have joined which proves that the conversion has definitely increased!!

**Will this people actually pay for it?**

In the end it does not matter much if more people are joining if in the end they don't become fulltime members...

So far from the 4 members that have joined only one has started to engage with the community. The others have joined the slack channel and are just in idle mode (which is a bit creepy tbh...)

**Am I worried?**

Ofc! I am always worried! I don't want to scare away the few paying members I have... I will give it a couple more days to see how things develop but I will probably start kicking out the people that have joined and did not say a word.

Do you think it is a good idea?

Will keep you posted...

PS: Listen to the podcast episode about this [here](https://wannabe-entrepreneur.com/episodes/175/)
Simple overview of MySQL (Relational Database)
Tags: sql, database, webdev, javascript
Published: 2021-12-24 13:26:09

**What is MySQL:**

MySQL is a Widely used relational database management system. It's free and open-source and ideal for both small and large applications. It's very fast,  reliable, scalable and easy to use. 

**Who uses MySQL?**

Most popular websites like Facebook, Twitter, Airbnb, Uber, YouTube, GitHub, etc. Content Management Systems like Wordpress, Joomla, Drupal, Contao, etc. A huge number of web developers around the world use MySQL as a database management system. 

**Show Data on your website:**

If you want to show data in your website from a database, you will need: 

- An RDBMS database program like MySQL.
- A server-side scripting language, like PHP.
- To use SQL to get the data you want.
- To use HTML/ CSS to style the page. 

**RDBMS:**  

RDBMS stands for Relational Database Management system. It's a program used to maintain a relational database. RDBMS is the basis for all modern database systems such as MySQL, Oracle, Microsoft SQL server and Microsoft Access. 

**Database Table:**  

A table is a collection of related data entries, and it consists of columns and rows. A column holds specific information about every record in the table. A Record or row is each individual entry that exists in a table. 
Look at this table: 

![Table image](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/znhfq8xe12fnu8ps0ucc.png) 
The columns in the table above are: CustomerID, CustomerName, ContactName, Address, City, PostalCode and Country. The table has 5 records.

**Explain Relational Database:**  

A Relational database defines database relationships in the form of tables. The tables are related to each other - based on data common to each. 

Look at the following three tables "Customers", "Orders" and "Shippers" database

Customers Table

![customer table](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7j8oxh5siadrbbzah4kt.png)

The relationship between the "Customers" table and the "Orders" table is the CustomerID column.

Orders Table

![users ordered table](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/kbr981fwx2zrh6oj2i9f.png)

The relationship between the "Orders" table and the "Shippers" table is the SipperID column. 

![shipprID](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/vjxzsgkizy1ji5macybw.png)

**Some Most important SQL Commands:**

- INSERT - Insert new data into a database
- SELECT - extract data from a database 
- UPDATE - updates data in a database
- DELETE - deletes data from database
- CREATE DATABASE - creates a new database
- AlTER DATABASE - modifies a database
- CREATE TABLE - creates a new table
- ALTER TABLE - modifies a table
- DROP TABLE - deletes a table
- DROP INDEX - deletes an index 
- CREATE INDEX - creates an index
Metaverse Token Development Company
Tags: metversetoken, token, tokendevelopment
Published: 2021-12-24 13:25:38

Want to create your Metaverse Token on Popular Blockchain Networks!

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