file tree for nodejs project

 find . \( -path "*/node_modules" -o -path "*/.git" \) -prune -o -print | tree -a -I 'node_modules|.git'

How to Build a Solana dApp: Creating a React TypeScript App with Wallet Adapter

To get started, make sure you have Node.js and npm installed on your computer. Then open your terminal or command prompt and navigate to the directory where you want to create the app.

Once there, run the following command to create a new React app named my-app using the TypeScript template:

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npx create-react-app my-app --template typescript

This will create a new React app with TypeScript support.

Next, navigate into the new app's directory by running:

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cd my-app

Now, you can install the Solana wallet adapter packages by running the following command:

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npm install --save \
    @solana/wallet-adapter-base \
    @solana/wallet-adapter-react \
    @solana/wallet-adapter-react-ui \
    @solana/wallet-adapter-wallets \
    @solana/web3.js \
    react

This will install the necessary packages for the Solana wallet adapter as well as React itself.

You can start the development server by running:

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npm start

This will start the app and you can view it in your browser at http://localhost:3000/.

To integrate the Solana wallet adapter into your app, refer to the official Solana documentation for more information on how to set it up and use it.

Websockets and asyncio with web server and client

 server side=>

import asyncio
	import websockets
	async def response(websocket, path):
	message = await websocket.recv()
	print(f"We got the message from the client: {message}")
	await websocket.send("I can confirm I got your message!")
	start_server = websockets.serve(response, 'localhost', 1234)
	asyncio.get_event_loop().run_until_complete(start_server)
	asyncio.get_event_loop().run_forever()

client side=>

import asyncio
	import websockets
	async def message():
	async with websockets.connect("ws://localhost:1234") as socket:
	msg = input("What do you want to send: ")
	await socket.send(msg)
	print(await socket.recv())
	asyncio.get_event_loop().run_until_complete(message())

Type checking with mypy and Type hints

 Hi,

Today I'm gonna show you type hints in python. 

Firstly you should install mypy

pip install mypy

Here is the example:

Basically we are defining to data types.

 For more information link is below:

http://mypy-lang.org/

Writing a PEP8 Standart of Python Code

Hi, 

I use flake8 in my code you should install :

pip install flake8

After that you can use like:

 flake8 example.py

In the Visual Studio Code you can use cornflakes-linter

If you want to ignore some error create a 

.flake8

file and write:

[flake8]

ignore=E501 

Example ss for flake8 and cornflakes-linter in VS Code

This is the website of flake8 you can check for more details.

https://flake8.pycqa.org/en/latest/

This is the website of pep8 you can check for more details.
 https://pep8.org/

PHP datetime common

 <?php

 

  // Declare and define two dates

  $date1 = strtotime("2016-06-01 22:45:00");

  $date2 = strtotime("2018-09-21 10:44:01");

 

  // Formulate the Difference between two dates

  $diff = abs($date2 - $date1);

 

  // To get the year divide the resultant date into

  // total seconds in a year (365*60*60*24)

  $years = floor($diff / (365*60*60*24));

 

  // To get the month, subtract it with years and

  // divide the resultant date into

  // total seconds in a month (30*60*60*24)

  $months = floor(($diff - $years * 365*60*60*24)

                                 / (30*60*60*24));

 

  // To get the day, subtract it with years and

  // months and divide the resultant date into

  // total seconds in a days (60*60*24)

  $days = floor(($diff - $years * 365*60*60*24 -

               $months*30*60*60*24)/ (60*60*24));

 

  // To get the hour, subtract it with years,

  // months & seconds and divide the resultant

  // date into total seconds in a hours (60*60)

  $hours = floor(($diff - $years * 365*60*60*24

         - $months*30*60*60*24 - $days*60*60*24)

                                     / (60*60));

 

  // To get the minutes, subtract it with years,

  // months, seconds and hours and divide the

  // resultant date into total seconds i.e. 60

  $minutes = floor(($diff - $years * 365*60*60*24

           - $months*30*60*60*24 - $days*60*60*24

                            - $hours*60*60)/ 60);

 

  // To get the minutes, subtract it with years,

  // months, seconds, hours and minutes

  $seconds = floor(($diff - $years * 365*60*60*24

           - $months*30*60*60*24 - $days*60*60*24

                  - $hours*60*60 - $minutes*60));

 

  // Print the result

  printf("%d years, %d months, %d days, %d hours, "

       . "%d minutes, %d seconds", $years, $months,

               $days, $hours, $minutes, $seconds);

?>