calculateDiscount Function Documentation

Introduction

The calculateDiscount function is a utility function that calculates the discounted amount for a given baseAmount. It allows you to apply discounts based on different discount rates and conditions. The function returns a promise that resolves to the discounted amount.

Function Signature

const calculateDiscount = (baseAmount, initialDiscount, mutatedDiscount, prop) => {
    // Function body
}

Parameters

• baseAmount: The initial amount for which the discount is to be applied.
• initialDiscount: An object representing the initial discount rate.
• mutatedDiscount: An object representing a mutated discount rate.
• prop: A boolean value indicating whether the initial discount should be considered.

Function Logic

1. The discountRate is determined based on different conditions:

   • If the prop parameter is true, the initial discount is considered. It checks if the initialDiscount.discount exists and is of length 2. If so, it sets the discount rate to '0'; otherwise, it uses the provided discount value (parsed as a float). If the initialDiscount does not exist, the discount rate is set to 0.

   • If the prop parameter is false or not provided, it uses the mutatedDiscount.discount value as the discount rate (parsed as a float). If mutatedDiscount.discount does not exist, the discount rate is set to 0.

2. The discountedAmount is calculated by subtracting the discount rate from the baseAmount.

3. The function returns a promise that resolves to the discountedAmount.

Usage Example

import calculateDiscount from './calculateDiscount';

// Sample usage with different discount scenarios
const baseAmount = 100; // Initial amount
const initialDiscount = { discount: '10' }; // Initial discount rate
const mutatedDiscount = { discount: '5' }; // Mutated discount rate
const prop = true; // Consider initial discount

// Calculate the discounted amount using the calculateDiscount function
calculateDiscount(baseAmount, initialDiscount, mutatedDiscount, prop)
    .then(discountedAmount => {
        console.log(`Discounted Amount: $${discountedAmount.toFixed(2)}`);
    });

GitHub Repository

• The source code for this function is available in the calculateDiscount GitHub repository.

Notes

• This function provides flexibility in applying discounts based on different conditions and sources.

• It can be used to calculate discounted prices in various scenarios, making it a versatile utility for discount calculations.

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This Markdown documentation provides a detailed explanation of the calculateDiscount function, its parameters, and how it performs the discount calculation. It also includes a usage example and a link to the GitHub repository for reference.