Code challenge from 9th May 2022 email from Cassidoo

cassidoo_code_question_meal_payment.js

let receipts = [
    { name: "Ximena", paid: 45 },
    { name: "Clara", paid: 130 },
    { name: "Ximena", paid: 100 },
    { name: "Cassidy", paid: 140 },
    { name: "Cassidy", paid: 76 },
    { name: "Clara", paid: 29 },
    { name: "Ximena", paid: 20 }
];
function whoOwes(array) {
    const meal_count = array.length;
    let unique_people = new Set();
    let culmulative_meal_cost = 0;
    let paid_per_person = {
        "Cassidy": 0,
        "Clara": 0,
        "Ximena": 0
    };
    let meal_details = [];
    for (i = 0; i < meal_count; i += 1) {
        let meal_cost = array[i].paid;
        let payer = array[i].name;
        unique_people.add(payer);
        paid_per_person[`${payer}`] += meal_cost;
        culmulative_meal_cost += meal_cost;
    }
    meal_details.push(paid_per_person,culmulative_meal_cost,unique_people);
    const person_total = meal_details[0];
    const meals_total = meal_details[1];
    const people_count = meal_details[2].size;
    const fair_amount_per_person = (meals_total / people_count);
    let overpayer = "";
    let differential = {};
    for (const [key, value] of Object.entries(person_total)) {
        if (value < fair_amount_per_person) {
            differential[`${key}`] = (fair_amount_per_person - value);
        } else {
            overpayer = key;
        }
    }
    let underpayers = Object.keys(differential);
    let underpaid = Object.values(differential);
    let message = "";
    for (i = 0; i < underpayers.length; i++) {
        message +=`${underpayers[i]} owes ${overpayer} \$${underpaid[i]}. `
    }
    return message;
};
console.log(whoOwes(receipts));

Not completely happy with this. Feels like I am missing a trick. I’ve had to manually add ‘starter’ values at line 15–17 which feels like I should be able to set programmatically after line 23. Couldn’t get this to work though. Struggling with adding items to objects based on what was, or would be, in the set.

Originally write as multiple smaller functions, then collapsed down into one where the only argument passed was receipts.

Good fun and thought-provoking.