DEV Community: Virendra Khorwal

Learn Solidity with me

Virendra Khorwal — Fri, 30 Sep 2022 07:35:33 +0000

Let's start

I am learning Solidity from freeCodeCamp and Solidity Official Documentation. As I learn some new concept I will try to explain to you. This will help me to understand it easily and also maybe you. If you feel something missing comment below. And feel free to ask any queries. All help each other and learn together.

Basics

I will first begin with the different types or data types in Solidity. There are different types in solidity.

Integer

int8 to int256 (8 steps) like int16, int24 etc.
uint8 to uint256 (8 steps) like uint16, uint24 etc.

int are signed integers and uint are unsigned integers. int256 and int are same. Similarly, uint256 and uint are also same. Or int is alias for int256 and uint is alias for uint256.

Address

There are two address types. One is address and another is address payable. The size of address is 20bytes same as the size of Ethereum Address. address payable is same as address but it have some additional information like transaction and send. We can implicitly convert address payable to address. But conversion from address to address payable done explicitly using payable(<address>)

Fixed Point Number

! Not fully support yet

We can declare fixed point number using fixed and ufixed. But can't assign to or from.

We will discuss how to perfrom operation on these types and other types in another blog.
Let's discuss the structure of a contract.

Structure of Contract

If you are familiar with object oriented programming like C++, Java then you can find contract is similar like classes in these object oriented programming.

contract SimpleStorage {
    // Code
}

A contract can contain -

State Variables
Functions
Function Modifiers
Events
Errors
Struct Types
Enum Types

State Variables are variables which permanently stored in contract. They store the state of that variable like

contract SimpleStorage {
    uint storeValue; // state variable
}

Struct Types are user defined or custom defined types which includes several types.

contract SimpleStorage {
    stuct Store {
        uint height;
        bool adult;
        address delegate;
        int number;
    }
}

Similar is Enum types but have finit set of constant values

contract SimpleStorage {
    enum Store {Created, Seated, Locked}
}

We will discuss Function, Function Modifies, Events Errors in another blog.

Basic Intro to Markdown or .md

Virendra Khorwal — Tue, 12 Oct 2021 18:07:23 +0000

Hey there 👋, I am back with another interesting topic. Markdown.

I will show you how to write markdown and where to write markdown.

What is Markdown?

According to www.markdownguide.org, it is a light weighted markup.
No need to remember this. It is basically a language or more precisely a markup language which use to document your code on github or sometimes people use it for their mathematical work.

The work we do with some word editor like ms-word or google docs, we can do with it.
And remember different editor preview markdown differently.

Where to write?

If you are fan of vs-code like me then, there is an extension for it so, there whatever you write you can preview it. Markdown Preview Enhanced
If you don't use vs-code, no worry that's not end of world. You can use StackEdit for online mode or Typora for offline use.

Basic Syntax of Markdown

For Heading

# Heading 1
## Heading 2
### Heading 3
#### Heading 4
##### Heading 5
###### Heading 6

Paragraph

This is Paragraph

Text Style

This is **Bold** text.
This is *italic* text.
This is ***italic bold*** text.

Line

***
---
___

Blockquotes

> Block Quotes
> > Nested Block Quote
> >> Another Nested Block Quote

For Images

![Alt Text](Place image link here)

For code

How to create awesome Github profile

Virendra Khorwal — Tue, 05 Oct 2021 05:03:41 +0000

In this blog post I'm gonna show you how to create a amazing github profile. This feature is a secret feature provided by github.

I will show you two methods to create github profile readme

By writing markdown self
By using profile readme generator

First, create a new repository whose name is same as your username. As you can see in below image.

Make this repository public and click on add readme.md and then finally click on create repository.

Method 1

Now, you can see your profile readme is generated.
Click on that highlighted button in image to edit this readme.
Use markdown to edit this.

Method 2

Visit the link Here.
Enter the information as asked. If you don't have some information like twitter account left it blank.
At bottom click on generate Readme and you get your profile readme. Download it and paste the in the readme you have generated in first method.

In next post I will show you how to write makrdown step by step.
Stay tuned with me. If you have doubt ask me on comment section.