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# This command will list all your environments which are setup in Elastic Beanstalk (EB)
$ eb list
EnvironmentName1 # Name of the first environment
EnvironmentName2 # Name of the second environment
EnvironmentName3 # Name of the third environment

# This command is used to display the status of the specified environment (EnvironmentName1)
$ eb status EnvironmentName1

# The following command will set an environment variable (ENV_VAR_NAME) to a specific value (value)

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-- The below query is used to fetch all the role names from the 'pg_roles' system catalog table.
-- It will return a list of all user (role) names in the current PostgreSQL database.
SELECT rolname FROM pg_roles;

-- This command is used to create a new PostgreSQL user with the specified username and password.
-- In this case, the newly created username is 'username' and the password is 'P@55w0rd'.
CREATE USER username WITH PASSWORD 'P@55w0rd';

-- This command grants all privileges to the user 'username' on the database 'dbname'.
-- These privileges include SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER, CREATE, CONNECT, TEMPORARY, EXECUTE, and USAGE

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# python -m pip install requests
import requests

url = "https://api-us.cometchat.io/v2"

headers = {
    "accept": "application/json",
    "Content-Type": "application/json",
    "Accept": "application/json",
    "appId": "---",

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# frozen_string_literal: true

mailer = ActionMailer::Base.new
mailer.delivery_method
mailer.smtp_settings
mailer.mail(from: 'sender@example.com', to: 'recipient@example.com', subject: 'Testing email', body: "Hello, you've got mail!").deliver!

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Calculate Pi to a precision p.

Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant figures of π. It was founded in 1988 by Larry Shaw, an employee of the San Francisco, California science museum, the Exploratorium.

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from numpy import matrix


def fib(n):
    return (matrix(
        '0 1; 1 1' if n >= 0 else '-1 1; 1 0', object
    ) ** abs(n))[0, 1]
    

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namespace Fibonacci;

/// <summary>
/// The Fibonacci sequence is a sequence of numbers where a number is the sum of the two preceding numbers.
/// The first 10 numbers in the Fibonacci sequence are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34.
/// </summary>
public static class Fibonacci
{
    /// <summary>
    /// Fibonacci in a recursive version

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import os

EXTENSIONS = ['py', 'rb', 'cs', 'ex', 'js', 'go', 'rs', 'dart', 'php', 'sql']


def create_files_by_extension_given_a_filename(name, directory):
    for extension in EXTENSIONS:
        file = f"{name}.{extension}"
        if os.path.exists(os.path.join(directory, file)):
            print('{0}: already exists!'.format(file))

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import os


def create_dirs_by_filenames(filenames, parent_dir):
    mode = 0o777
    for directory in filenames:
        os.mkdir(os.path.join(parent_dir, directory), mode)


def get_filenames(path):