05-Functions

05Functions.js

//simple sum
function simpleSum (a, b) {
    return a + b;
}

console.log(simpleSum(3,4));

//Default Greet
//`` lets you add the implicit stuff from the parameter with te ${} this is clean
const defaultGreet = (firstName, lastName = "Doe") => {
    return `Hi ${firstName} ${lastName}!`;
}

console.log(defaultGreet("Jason", "Friedlander"));

//alt version 1
function defaultGreetAlt1 (firstName, lastName = "Doe") {
    return `Hi ${firstName} ${lastName}!`;
}

console.log(defaultGreetAlt1("Ian", "Friedlander"));

//alt version 2
function defaultGreetAlt (firstName, lastName) {
    if (lastName === undefined) {
        lastName = 'Doe';
    }
    return firstName + ' ' + lastName;
}

console.log(defaultGreet("Nicole"));

//tax calculator
 const taxCalulator = (amount, state) => {
     switch (state) {
         case "NY":
            return amount * 1.04;
         case "NJ":
            return amount * 1.0625;
        default:
            return amount;
     }
 };
 console.log(taxCalulator(100, "NJ"));

//Making a word from first letter of each word submitted
const myMnemonic = (firstWord = "", secondWord = "", thirdWord = "", fourthWord = "") => {
    let mnemonic ='';

    if (firstWord !== undefined) mnemonic += firstWord[0];
    if (secondWord !== undefined) mnemonic += secondWord[0];
    if (thirdWord !== undefined) mnemonic += thirdWord[0];
    if (fourthWord !== undefined) mnemonic += fourthWord[0];

    return mnemonic;
}

// for loop version
// Rest Operator - we're turning all the arguements coming into this function into an array.
const myMnemonic = (...words) => {
    let mnemonic = '';
    
   for (let i = 0; i < words.length; ++i) {
       const currentWord = words[i];
       const currentCharacter = currentWord[0];

       mnemonic += currentCharacter;
   }
    return mnemonic;
}