startit/eloquentjavascript/functions.js

const square = function (x) {
    return x * x;
}

const hummus = function (factor) {
    const ingredient = function (amount, unit, name) {
        let ingredientAmount = amount * factor;
        if (ingredientAmount > 1) {
            unit += "s";
        }
        console.log(`${ingredientAmount} ${unit} ${name}`);

    };
    ingredient(1, "can", "chickpeas");
    ingredient(0.25, "cup", "tahini");
    ingredient(0.25, "cup", "lemon juice");
    ingredient(1, "clove", "garlic");
    ingredient(2, "tablespoon", "olive oil");
    ingredient(0.5, "teaspoon", "cumin");
};
hummus(10);

function power(base, exponent){
    if (exponent === 0) {
        return 1;
    } else {
        return base * power(base, exponent -1);
    }
    
}
console.log(power(2, 3));

function findSolution(target){
    function find(current, history){
        if (current == target){
            return history;
        } else if (current > target){
            return null;
        } else {
            return find(current + 5, `(${history} + 5)`) ??
            find (current * 3, `(${history} * 3)`);
        }
    }
    return find(1, "1");
}
console.log(findSolution(24));

function printFarmInventory(cows, chickens) {
    let cowString = String(cows);
    while (cowString.length < 3) {
        cowString = "0" + cowString;
    }
    console.log(`${cowString} Cows`);
    let chickenString = String(chickens);
    while (chickenString.length < 3){
        chickenString = "0" + chickenString;
    }
    console.log(`${chickenString} Chickens`);
}
printFarmInventory(7, 11);

function printZeroPaddedWithLabel(number, label) {
    let numString = String(number);
    while (numString.length < 3) {
        numString = "0" + numString;
    }
    console.log(`${numString} ${label}`);
};

function printFarmInventory_2(cows, chickens, pigs) {
    printZeroPaddedWithLabel(cows, "Cows");
    printZeroPaddedWithLabel(chickens, "Chickens");
    printZeroPaddedWithLabel(pigs, "Pigs");
}
printFarmInventory_2(7, 11, 3);

function zeroPad(number, width){
    let string = String(number);
    while (string.length < width) {
        string = "0" + string;
    }
    return string;
}
function printFarmInventory_3(cows, chickens, pigs) {
    console.log(`${zeroPad(cows, 3)} Cows`);
    console.log(`${zeroPad(chickens, 3)} Chickens`);
    console.log(`${zeroPad(pigs, 3)} Pigs`);
}
printFarmInventory_3(7, 16, 3);