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Inheritance & Code Modules

Ayesha
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Clean architecture relies on classes inheriting core functionality and organizing related components into distinct files using modular export paths.

1. Class Inheritance Mechanics​

Classes reuse or override parent logic using the extends keyword. Subclasses must invoke the parent constructor using super() before accessing this

Video Explanation​

class BasicPeripheral {
    constructor(public connectionType: string) {}

    public powerOn(): void {
        console.log("Peripheral initializing power sequences.");
    }
}

class OpticalScanner extends BasicPeripheral {
    constructor(connectionType: string, public maxResolutionDPI: number) {
        super(connectionType); // Invokes the parent constructor layout
    }

    // Overriding parent method definitions
    public override powerOn(): void {
        super.powerOn(); // Optional: Triggers parent baseline operations
        console.log(`Calibrating optical array at ${this.maxResolutionDPI} DPI.`);
    }
}

2. Code Organization Modules (export & import)​

TypeScript uses standard ES Module semantics to manage file boundaries and share code components between separate modules

Video Explanation​

// Inside file path context: dataUtility.ts
export interface SecurePayload {
    hashAlgorithm: string;
    signatureBlock: string;
}

export function dispatchPayload(payload: SecurePayload): void {
    console.log("Transmitting secure validation payload structures.");
}

You can import these components into your main application file using relative path mappings:

// Inside file path context: mainApp.ts
import { SecurePayload, dispatchPayload } from "./dataUtility";

const verificationTask: SecurePayload = {
    hashAlgorithm: "SHA-256",
    signatureBlock: "0x8F3C9E"
};

dispatchPayload(verificationTask);
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