Cell 7

process.env.HOME

What the code could have been:

typescript
/**
 * Module: Environment Variables
 * Description: Provides methods to access and manipulate environment variables.
 */

// Import required modules
import * as os from 'os';

/**
 * Function: getHomeDirectory
 * Description: Returns the home directory of the current user.
 * Returns: string
 */
function getHomeDirectory(): string {
    // Use the os module to retrieve the home directory
    return os.homedir() || process.env.HOME || '';
}

// Example usage:
console.log(getHomeDirectory());

/**
 * Function: getEnvironmentVariable
 * Description: Returns the value of a specific environment variable.
 * Parameters:
 *  - variable (string): The name of the environment variable to retrieve.
 * Returns: string
 */
function getEnvironmentVariable(variable: string): string {
    // Check if the variable is set in the environment
    return process.env[variable] || '';
}

// Example usage:
console.log(getEnvironmentVariable('HOME'));

// Refactored main function
function getHomeDirectoryUsingEnvironmentVariable(): string {
    // Check if the HOME environment variable is set
    return getEnvironmentVariable('HOME') || '';
}

// Run the main function to test the code
console.log(getHomeDirectoryUsingEnvironmentVariable());

process.env.HOME

const homeDir = process.env.HOME;
console.log(homeDir);