teleren/devto huggingface dataset:
How can you build a Multi-Vendor e-Commerce site in Laravel ?
Tags: laravel
Published: 2021-05-12 09:31:48

Building a multi-vendor marketplace allows you to attract sellers to sell on your online store and provide your customers with multiple options to purchase products from different vendors. By using the Laravel multi-vendor marketplace, you can easily set up your own eCommerce marketplace like Amazon, Souq, IKEA, etc.
How to build the multi-vendor marketplace in Laravel?
•	Separate Seller/Vendor Profile with a dedicated Shop URL.
•	Manage Seller Branding by providing the banner, social links and SEO friendly URLs for their shop.
•	Product Search by Seller/Vendor on Vendor Panel.
•	Separate view for seller's product collection.
The Laravel marketplace extension offers the following features:
•	Separate Seller/Vendor Profile with a dedicated Shop URL.
•	Manage Seller Branding by providing the banner, social links and SEO friendly URLs for their shop.
•	Product Search by Seller/Vendor on Vendor Panel.
•	Separate view for seller's product collection.
•	Seller's feedback and interactive review system with the star rating.
•	Dedicated seller dashboard to view income, pay-outs, order details, latest comments, and reviews.
•	Proper check on Stock availability.
•	Admin can set global commission for the seller.
Highlights of the Laravel multi-vendor marketplace platform
•	Dedicated URL shop is assigned to the seller and vendor profile separately
•	Managing social links, search engine optimization friendly URLs, banner provisions for brand and service promotions
•	Easy product search both by the seller and the vendor with respect to the vendor panel.
•	Seller's product collection will have a separate view where an interactive review system can be seen.
•	Stock availability reports
•	Product assignment by the administrator to the seller’s account
•	seller dashboard to analyse the income, order details, pay-outs, comments and reviews
•	Global commissions establishment for the administrator
•	Product and services approved by the administrator
•	Product Comparison
•	Multi-level categories
•	Categorized, deals and offers
•	Shipping and return management
For more development you can ask expert Laravel developers who will help to increase your business globally.

https://www.laravellions.com/
User-defined functions

Published: 2021-05-12 09:29:37

A function is a block of code that performs a specific task. C allows you to define functions according to your need. These functions are known as user-defined functions.
There can be 4 different types of user-defined functions, they are:

1.Function with no arguments and no return value
2.Function with no arguments and a return value
3.Function with arguments and no return value
4.Function with arguments and a return value

Function prototype

A function prototype is simply the declaration of a function that specifies function's name, parameters and return type. It doesn't contain function body.
A function prototype gives information to the compiler that the function may later be used in the program.
Syntax of function prototype
returnType functionName(type1 argument1, type2 argument2, ...);

Calling a function

Control of the program is transferred to the user-defined function by calling it.
Syntax of function call
functionName(argument1, argument2, ...);

Return Statement

The return statement terminates the execution of a function and returns a value to the calling function. The program control is transferred to the calling function after the return statement.
Syntax of return statement
return (expression); 
The type of value returned from the function and the return type specified in the function prototype and function definition must match.
Spring Security JWT Authentication example – RestAPIs SpringBoot + Spring MVC + Spring JPA + MySQL
Tags: springsecurity, jwt, mysql, springjpa
Published: 2021-05-12 09:20:24

https://grokonez.com/spring-framework/spring-security/spring-security-jwt-authentication-restapis-springboot-spring-mvc-spring-security-spring-jpa-mysql

Spring Security JWT Authentication example – RestAPIs SpringBoot + Spring MVC + Spring JPA + MySQL

JSON Web Token defines a compact and self-contained way for securely transmitting information as a JSON object.
In the tutorial, we show how to build a SpringBoot Security RestAPIs with JSON Web Token (JWT).

Related posts:
- <a href="https://grokonez.com/spring-framework/spring-security/use-spring-security-jdbc-authentication-mysql-spring-boot">Spring Security – JDBC Authentication – SpringBoot + MySQL + Bootstrap</a>
- <a href="https://grokonez.com/sql/sql-tutorial-mysql-many-to-many-relationship">SQL Tutorial – MySQL Many-to-Many Relationship</a>
- <a href="https://grokonez.com/spring-framework/spring-data/spring-jpa-many-to-many">Spring JPA Hibernate Many to Many – SpringBoot + PostgreSQL</a>

Series:
- <a href="https://grokonez.com/spring-framework/spring-boot/angular-spring-boot-jwt-authentication-example-angular-6-spring-security-mysql-full-stack-part-1-overview-and-architecture">Angular Spring Boot JWT Authentication example | Angular 6 + Spring Security + MySQL Full Stack</a>

<div class="jsa-attract-box">
<a href="https://grokonez.com/spring-framework/spring-boot/spring-boot-spring-security-jwt-authentication-architecture-tutorial">Spring Security – JWT Authentication Architecture | Spring Boot</a>
</div>

<!--more-->
<h2>Technologies</h2>
- Spring Boot
- jjwt - 0.9.0
- Spring Security
- Spring JPA
- MySQL
<h2>JSON Web Token</h2>
JSON Web Token (JWT) defines a compact and self-contained way for securely transmitting information between parties as a JSON object. 

Scenarios where JSON Web Tokens are useful:
<ul>
<li><strong>Authorization</strong>: the most common scenario for using JWT. Single Sign On is a feature that widely uses JWT</li>
<li><strong>Information Exchange</strong>: Because JWTs can be signed, JSON Web Tokens are a good way of securely transmitting information between parties.</li>
</ul>

JSON Web Tokens consist of 3 parts:
<ul>
<li>Header</li>
<li>Payload</li>
<li>Signature</li>
</ul>

-> <code>JWT</code> looks like <code>Header-Base64-String.Payload-Base64-String.Signature-Base64-String</code>

<strong>Header</strong>	consists of two parts: 
<ul>
<li>token type.</li>
<li>hashing algorithm.</li>
</ul>

-> Example: 

More at:

https://grokonez.com/spring-framework/spring-security/spring-security-jwt-authentication-restapis-springboot-spring-mvc-spring-security-spring-jpa-mysql

Spring Security JWT Authentication example – RestAPIs SpringBoot + Spring MVC + Spring JPA + MySQL
How to make Reverse Shell using Python [2021]
Tags: python, reverse, shell, hacking
Published: 2021-05-12 09:10:34

##What is a Reverse Shell
The reverse shell is a shell session formed on a connection initiated by a remote machine. Attackers who successfully exploit the risk of executing remote commands can use an inverse armor to obtain an interactive shell session on the target machine and continue their attack. Remote shell access (also known as a connector-back shell) may be the only way to remote shell access via NAT or a firewall. Let's see how the reverse shell works in practice.

##How to Create Reverse Shell in Python
[Reverse Shell Python Tutorial](https://ilabacademy.blogspot.com/2021/05/python-reverse-shell.html)
File Management in java

Published: 2021-05-12 09:07:36

C Programming - File management in C
In this tutorial you will learn about java Programming - File management in java, File operation functions in java, Defining and opening a file, Closing a file, The getw and putw functions, The fprintf & fscanf functions, Random access to files and fseek function.C supports a number of functions that have the ability to perform basic file operations, which include:1. Naming a file2. Opening a file3. Reading from a file4. Writing data into a file5. Closing a file
•Real life situations involve large volume of data and in such cases, the console oriented I/O operations pose two major problems
•It becomes cumbersome and time consuming to handle large volumes of data through terminals.
•The entire data is lost when either the program is terminated or computer is turned off therefore it is necessary to have more flexible approach where data can be stored on thedisks and read whenever necessary, without destroying the data. This method employs the concept of files to store data.

File operation functions in C:
Function    :Name Operation
fopen()     :Creates a new file for useOpens a new existing file for use
fclose()    : Closes a file which has been opened for 
usegetc()   :Reads a character from a file
putc()      :Writes a character to a file
fprintf()   :Writes a set of data values to a file
fscanf()    :Reads a set of data values from a file
getw()      :Reads a integer from a file
putw()      :Writes an integer to the file
fseek()     :Sets the position to a desired point in the fileftell() :Gives the current position in the file
Wednesday Links - Edition 2021-05-12 
Tags: kotlin, java, jvm, cleancode
Published: 2021-05-12 08:57:07

Justifying of removal of SecurityManager (14m read) 💩
https://inside.java/2021/04/23/security-and-sandboxing-post-securitymanager/

Bits matters, int overflow (30s read) 🤯
https://twitter.com/sweis/status/1390374132265537548

Feed your Junit5 Parameterized Tests with YAML (3m read) 🤮
https://github.com/verhas/yamaledt

Awaitility with version 4.1.0 comes with fail fast feature (2m read) 🎉
https://github.com/awaitility/awaitility/wiki/Usage#fail-fast-conditions

Remember to set exact versions of dependencies (30s read) 🥸
https://twitter.com/nicolas_frankel/status/1391026192371888130

SOLID replacement proposal (30s read) 😱
https://twitter.com/petikoch/status/1392216931378384897

I'm looking at you, Loom (11min read) 🧐
https://inside.java/2021/05/10/networking-io-with-virtual-threads/

Teeing, hidden gem in Collectors API (3min read) 💎
https://blog.frankel.ch/teeing-java-api/

Size of JFR event (6min read) 🏋️‍♀️
https://richardstartin.github.io/posts/jfr-event-sizes

Kotlin supports JVM 15 features (3m read) 😈
https://www.infoq.com/news/2021/05/kotlin-1-5-released

Basics of basics DNS (256s listen) 🎙
https://256.nurkiewicz.com/39
Self Service — The Key to Unlock DevOps
Tags: devops, devsecops, kubernetes, selfservicedevops
Published: 2021-05-12 08:56:24

Enterprises today are dedicating a lot of time and resources to ensure that the apps they build are the best version of themselves in all ways. Meanwhile, developers and IT Ops, together are trying to establish a continuous app delivery pipeline that enables effortless app deployment on demand. Yet, not all teams are able to achieve continuous delivery.

In the present day scenario, there is more pressure than ever for apps to move faster and be more agile without compromising on security or reliability which makes enterprises look for alternative approaches to software development. Apart from adopting modern app architectures, it is essential to change the workflow as well because the old methods of app development cannot be relied upon to speed up app delivery. That is why enterprises all around the world are trying to adopt the DevOps approach. DevOps is defined as the blending of the development and IT operations teams in order to enhance the app delivery process and have a continuous delivery pipeline in place. read more
Il n'y a pas que le développement web dans la vie.
Tags: french, changemymind, webdev
Published: 2021-05-12 08:56:04

Il n'y a pas que le web dans la vie.

J'ai l'impression d'être un extra-terrestre quand je dis à mes interlocuteurs :

- "Oui, tu peux entrainer un réseau de neurones en local dans une app mobile pour améliorer l'UX"

- "Oui, on peut faire un serveur web en Kotlin, Swift ou en Go pour du microservice"

- "Non, on ne traite pas des données (big data) avec du PHP ou du JS, c'est pas fait pour, c'est moins efficient qu'en Python ou qu'en Go"

- "Oui il y a autre chose que WAMP dans la vie, Docker par exemple et ca permet d'avoir des environnements riches et stimulants (l'inverse du classique Apache, Mysql, PHP 5.6 par exemple 🤢)"

- "Il n'y a pas que le SQL/NoSQL dans la vie, tu peux aussi faire des bases graph, des bases par document, par clé/valeur, etc."
 
Je trouve cela incroyable de constater que 90% des développeurs et décideurs que je rencontre ne voient que 20% du spectre des solutions disponibles pour leur projet.
 
Comment innover sans connaissances diversifiées ?
 
Et je ne parle pas des technos de développement mobile.

Je suis fou ou le monde est à 90% sur le web mais ce qui fait tourner les gros projets ce n'est pas du web ? (Données, Machine Learning, Application à succès, etc.)
Platform9 combine to accelerate Kubernetes adoption
Tags: kubernetes, platform9, k8s
Published: 2021-05-12 08:53:38

Migration to K8s (Kubernetes) involves multiple aspects like setting up a K8s cluster, managing & operational aspects, deployment considerations as well as moving applications to that cluster with continuous delivery so as to derive the intended benefits of cost-efficiency, scalability, and portability. The whole project typically involves diverse pieces of effort requiring different skill-sets and a lot of time.

The complexities around K8s can be resolved by bringing together two critical pieces of the puzzle - 1) Simplification of K8s cluster setup & management, and 2) Simplification of app migration/delivery to K8s. This is exactly what the powerful combination of Platform9 and HyScale brings to the table.
PAGING IN OPERATING SYSTEM
Tags: operatingsystems, paging, pagereplacement, fifo
Published: 2021-05-12 08:52:58

PAGE REPLACEMENT:
->Prevent over-allocation of memory by modifying page-fault service routine to include page replacement
->Use modify (dirty) bit to reduce overhead of page transfers – only modified pages are written to disk
->Page replacement completes separation between logical memory and physical memory – large virtual memory can be provided on a smaller physical memory
===================================================================================
Basic Page Replacement:
1.Find the location of the desired page on disk
2.Find a free frame:
-If there is a free frame, use it 
-If there is no free frame, use a page replacement algorithm to select a victim frame
-Write victim frame to disk if dirty
3.Bring  the desired page into the (newly) free frame; update the page and frame tables
4.Continue the process by restarting the instruction that caused the trap
=>Note now potentially 2 page transfers for page fault – increasing EAT
===================================================================================
Page and Frame Replacement Algorithms:
=>Frame-allocation algorithm determines 
-How many frames to give each process
-Which frames to replace
=>Page-replacement algorithm
-Want lowest page-fault rate on both first access and re-access
=>Evaluate algorithm by running it on a particular string of memory references (reference string) and computing the number of page faults on that string
-String is just page numbers, not full addresses
-Repeated access to the same page does not cause a page fault
-Results depend on number of frames available
===================================================================================
Page Replacement Algorithms:
-FIFO
-OPTIMAL REPLACEMENT
-LRU REPLACEMENT
-SECOND CHANCE PAGE REPLACEMENT
===================================================================================
-FIFO:First In First Out (FIFO) –
This is the simplest page replacement algorithm. In this algorithm, the operating system keeps track of all pages in the memory in a queue, the oldest page is in the front of the queue. When a page needs to be replaced page in the front of the queue is selected for removal.
-OPTIMAL REPLACEMENT:
In this algorithm, pages are replaced which would not be used for the longest duration of time in the future.
-LRU REPLACEMENT:
Least Recently Used –In this algorithm page will be replaced which is least recently used.
-SECOND CHANCE PAGE REPLACEMENT:
the Second Chance replacement policy is called the Clock replacement policy.
In the Second Chance page replacement policy, the candidate pages for removal are consider in a round robin matter, and a page that has been accessed between consecutive considerations will not be replaced.The page replaced is the one that - considered in a round robin matter - has not been accessed since its last consideration.
Top Tips to Start Project and Execute Tasks Efficiently
Published: 2021-05-12 08:25:40



Project Tracker Tool

There is no one size fits all approach for executing the tasks. The project tracker tool can assist you to meet multiple tasks effectively at the workplace. But, as a project manager, at times, it is necessary for you to use multiple procedures to resolve some issues and execute tasks efficiently. All you need to follow the best set of methodologies that suit the project requirements.

Here are a few important steps to initiate a project and execute the tasks systematically. 
Top Techniques for Effective Task Execution and Project Completion
Whether your project is large or small, complex or simple, proper planning and scheduling is crucial along with integration of all necessary operations. You can take assistance of a project tracker tool to ensure a timely completion of the project, but before executing any task, it is imperative to blend the Ying with the Yang of the project, i.e. planning and scheduling. 

Let’s dig deep into the necessary steps to address this objective effectively. 
1. Make a Roadmap
First things first. The scope of the project or a roadmap can assist you to go through goals, methodologies, and other important aspects at once. Every project needs a careful planning, and therefore, a clear roadmap is essential. You can arrange a meeting with teammates and discuss all the points of your planning with them. Based on the meeting’s outcome, you can make informed decisions before initiating the project. 

2. Find Resources
Traditionally, the project manager allocates tasks to team members based on their own thinking and beliefs. There is no role of data in it. But, this method may fail to achieve the desired goals for your organization. Thanks to evolving technology, you can check the previous records of your team members on the project management software and define roles based on their skills. This strategy can help you attain desired productivity while executing the project. 

Original Source: https://www.taskopad.com/blog/execute-tasks-systematically-for-projects/
Laravel 8 Image Upload Example Tutorial

Tags: laravel, php, programming, tutorial
Published: 2021-05-12 08:23:19

Today, I will give you example of laravel 8 image upload example. I’m going to show you about image upload in laravel 8. this example will avail you laravel 8 upload image to database. This article goes in detailed on how to upload and exhibit image in laravel 8. Here, Engendering a rudimentary example of laravel 8 image upload with preview.

full example follow below link..

https://codingtracker.blogspot.com/2021/05/laravel-8-image-upload-example-tutorial.html
Why you MUST participate in Hackathons?
Tags: mlhgrad, localhackday
Published: 2021-05-12 08:22:37

When I joined university, I had just heard of the term from my friends, whose siblings participated in "hackathons" and I was really unaware but then came MLH's Local Hack Day: Build, for which I attended events at 4 in the morning but I found them super fun and it was a really new experience for me.

For you, the word "Hackathon" might feel daunting at first. But let me simplify it for you, these are some of the easiest platforms to compete and win prizes from your current level of coding knowledge, yes, you read that right! Whether you are an experienced programmer or know absolutely nothing about coding, hackathons are for YOU. From workshops to mini-events to project submissions, you end up learning a lot more things than you normally would. You can participate with your friends or work single-handedly. 

Along with technical proficiency, you also get a chance to improve your soft skills by interacting with people from all over the world and also, if you don't have teammates, you can find them through these platforms, and who knows, you can meet some of your greatest friends for life.
I would also personally recommend any beginner to start with the hackathons listed on mlh.io or ones on Devpost. These are perfect for anyone, who has either just started to code or is a pro.

Hackathons are beginner-friendly environments where you can make new friends, turn some awesome innovative ideas into reality, win prizes, and get free swag! In the end, all that matters is your will to learn and how much you want to improvise and want to achieve. Dream bug, oops, big. 

Keep Innovating. Keep Learning. Keep Coding.
How to find inspiration for your website?
Tags: html, css, tutorial, productivity
Published: 2021-05-12 08:12:37

Hey! That is the last introduction article to solve some mental problems before starting the real work! Hopefully, it will be useful for a good start.

###Inspiration is in the air
It can sound dumb, but your mental health have a big influence on your work:
- Be in a good mood to start thinking
- Be in a quiet place with no people around. It is your time to have confidence.
- Forget all problems. Remember, the hardest thing - is the start. 
- Do it today. Tomorrow you will easier deny this idea.
- Never stop. If you stop, you have to make everything once again from the very beginning.
- Don't be afraid. Although you aren't a popular programmer that earns a lot, remember, every person is individual. Some people will find your ideas fresh and interesting.

###Real inspiration, real experience
Of course, people who start their way, don't make any explosions of ideas. Everyone needs real experience to understand, what is needed today.

- Keep abreast of the latest events, news in the world of web development.
- Visit popular communities to check opinion of developers. ([Webdevelopper](https://www.webdeveloper.com), [Designerhangout](https://www.designerhangout.co), [Digitalpoint](https://forums.digitalpoint.com))
- Check the websites-stores with templates ([Creativemarket](https://creativemarket.com/templates/websites), [Templatemonster](https://www.templatemonster.com), [Dribbble](https://dribbble.com/tags/buy))
- Google for colour picker and make some interesting matches

Your goal to make something that is not used by others, something yours. Even if you find your design of website bad, some people will find it creative. Things that become popular are new.

Once you start and make something yours, your future projects will be getting better and better, as you are a child that learns _how to draw_ - the more you draw, the better you do.

The next article will be dedicated to some project. I will share my point of view on _how to make a website the most effective way_ and we will move to the real things.

Follow me for updates!