Develop Reference

im a new learner and cant figure out why my code is not working

I have just recently got into coding and have chosen to learn JavaScript as my first language. I have written up code for a Rock, Paper, Scissors game but the wrong outputs come out when I run it? for example I would put my answer as scissors and the computer would choose rock and the game will come out as a tie.
const getUserChoice = userInput => {
if (userInput === 'rock' || userInput === 'paper' || userInput === 'scissors') {
return userInput
} else {
return 'Error!'
}
}
var getComputerChoice = () => {
const randomNumber = Math.floor(Math.random() * 3);
switch (randomNumber) {
case 0:
return 'rock'
break;
case 1:
return 'paper'
break;
case 2:
return 'scissors'
break;
}
};
const determineWinner = (userChoice, computerChoice) => {
if (userChoice === computerChoice) {
return 'its a tie!';
};
if (userChoice === 'rock') {
if (computerChoice === 'paper') {
return 'computer won';
} else {
return 'user won';
}
}
if (userChoice === 'paper') {
if (computerChoice === 'scissors') {
return 'computer won';
} else {
return 'user won'
}
}
if (userChoice === 'scissors') {
if (computerChoice === 'rock') {
return 'computer won';
} else {
return 'user won'
}
}
};
const playGame = () => {
console.log(`player chose ${getUserChoice('scissors')}`);
console.log(`computer chose ${getComputerChoice()}`);
console.log(determineWinner(getUserChoice("scissors"), getComputerChoice()));
}
playGame();

Maybe there are more issues, but here are some of them:
Each time you execute getComputerChoice you get a different value because a random value is picked inside:
console.log(`player chose ${getUserChoice('scissors')}`);
console.log(`computer chose ${getComputerChoice()}`);
console.log(determineWinner(getUserChoice("scissors"), getComputerChoice()));
So you must instead call and store in variables:
let playerChose = getUserChoice('scissors');
let computerChose = getComputerChoice();
let winner = determineWinner(playerChose, computerChose);
console.log(`player chose ${playerChose}`);
console.log(`computer chose ${computerChose}`);
console.log(winner);
You can do it without variables, but be sure not invoking getComputerChoice several times.
Also userInput should be between parenthesis at:
const getUserChoice = (userInput) => {

Every time you call getComputerChoice you'll get a different value, you could save the values in a variable with the const keyword.
const playGame = () => {
// It would be nice if you request this to the user, with prompt
const userChoice = getUserChoice('scissors');
// Save the random value
const computerChoice = getComputerChoice();
console.log(`player chose ${userChoice}`);
console.log(`computer chose ${computerChoice}`);
// This will work
console.log(determineWinner(userChoice, computerChoice));
}
playGame();
More on prompt here

Beginners first try at coding rock, paper.. game. Keeps returning 'paper wins'

I keep getting 'paper wins' when I enter 'rock' as my choice.
function game() {
pChoice = prompt('What is your play?');
cChoice = ['rock','paper','scissor'];
let compChoice = [Math.floor(Math.random() * cChoice.length)];
console.log(compChoice);
function compare(pChoice, compChoice) {
if (pChoice === compChoice) {
alert( "It's a tie" );
}
if (pChoice === 'rock') {
if (compChoice === 'scissor') {
return 'rock wins';
} else {
return 'paper wins';
}
}
else if (pChoice === 'paper') {
if (compChoice === 'rock') {
return 'paper wins';
} else {
return 'scissor wins';
}
}
else if (pChoice === 'scissor') {
if (compChoice === 'paper') {
return 'scissor wins';
} else {
return 'rock wins';
}
}
}
var result = compare(pChoice, compChoice);
console.log(compare(pChoice, compChoice));
}
game();

You never assign cChoice to a value, instead you are assigning it to an array with a number in it.
For example:
// Assigning to [number]
let compChoice = [Math.floor(Math.random() * cChoice.length)];
// Assigning to string inside of array cChoice
let compChoice = cChoice[Math.floor(Math.random() * cChoice.length)];

Ties are still running win messages?

I've been messing around with a rock, paper scissors project that codecademy gets you to try, I'm pretty happy with it but I have one problem! When the result is a tie, it logs the tie message (perfect!) but also logs the win message linked with the result!
How do I get it to ONLY log the tie message?
Here's the code:
const getUserChoice = userInput => {
userInput = userInput.toLowerCase();
if (userInput === "rock" || userInput === "paper" || userInput === "scissors" || userInput === "gun") {
return userInput;
} else {
console.log(`Sorry! But ${userInput} is an illegal weapon in the bloodythirsty sport of Rock, Paper, Scissors!`)
}
}
const getComputerChoice = () => {
const ranNum = Math.floor(Math.random() * 3);
switch (ranNum) {
case 0:
return "rock";
case 1:
return "paper";
case 2:
return "scissors";
}
};
const determineWinner = (getUserChoice, getComputerChoice) => {
if (getComputerChoice === getUserChoice) {
console.log("It seems it's a tie! You've matched wits!");
}
if (getUserChoice === "rock") {
if (getComputerChoice === "paper") {
return "The computer wins! It has gift wrapped your weapon.";
} else {
return "You beat the computer! They immediately begin crafting bigger scissors.";
}
}
if (getUserChoice === "paper") {
if (getComputerChoice === "scissors") {
return "The computer wins! They claim arts and crafts time as a reward."
} else {
return "You beat the computer! Their puny stone was no match for your paper aeroplane to the eye!"
}
}
if (getUserChoice === "scissors") {
if (getComputerChoice === "rock") {
return "The computer wins! You won't be cutting straight lines any time soon..."
} else {
return "You beat the computer! You cause emotional damage by destroying their robot child's drawing. You're a monster."
}
}
if (getUserChoice === "gun") {
if (getComputerChoice === "rock" || getComputerChoice === "paper" || getComputerChoice === "scissors") {
return "You win. But at what cost?"
}
}
if (getUserChoice === undefined) {
return "Come back when you're ready to take this game seriously."
}
}
//Enter your choice below in getUserChoice brackets
const playGame = () => {
let userChoice = getUserChoice("rock");
let computerChoice = getComputerChoice();
if (userChoice !== undefined) {
console.log(`You have chosen ${userChoice} as your weapon.`);
}
if (userChoice !== undefined) {
console.log(`The computer has brought ${computerChoice} to a ${userChoice} fight.`);
}
console.log(determineWinner(userChoice, computerChoice))
}
playGame();

Instead of logging the tie message, you should return it, leaving the logging to the caller:
if (getComputerChoice === getUserChoice) {
return "It seems it's a tie! You've matched wits!";
}

Tie result cannot be outputted

While creating the rock, paper, scissors application, I am tasked to output specific results in the console, such as outputting paper-paper and receive 'It's a tie' result. Well, I have tried to do that but for some reason, I cannot do so. The code is as below:
const user = userInput => {
userInput = userInput.toLowerCase();
if(userInput === 'rock' || userInput === 'paper' || userInput === 'scissors'){
return userInput;
} else {
console.log('error');
}
}
function computer() {
random = Math.floor(Math.random() * 3);
switch(random){
case 0 : return 'rock';
break;
case 1 : return 'paper';
break;
default : return 'scissors';
}
};
const winner = () => {
const choice1 = user('rock');
const choice2 = computer();
if(choice1 === choice2) {
return 'It\'s a tie!';
}
if(choice1 === 'rock') {
if(choice2 === 'paper') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
if(choice1 === 'paper') {
if(choice2 === 'scissors') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
if(choice1 === 'scissors') {
if(choice2 === 'rock') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
}
console.log(winner('paper', 'paper'));
When I try to type console.log(winner('paper', 'paper')) for example, the result is random meaning that it can be either win, lost or tie due to the fact (or what I suppose is the reason) that the computer's choice is random but this is how I am asked to create the computer's choice. If I type console.log(('paper', 1)) I get the same result but somehow, the task is asking me to use console.log(winner('paper', 'paper')) and is telling me that the result should be a tie. I have also tried to let the user with no parameter in choice1 but I get an error due to the fact that there is no input in the user's choice.
The tasks are as below:
console.log(determineWinner('paper', 'scissors')); // prints something like 'The computer won!'
console.log(determineWinner('paper', 'paper')); // prints something like 'The game is a tie!'
console.log(determineWinner('paper', 'rock')); // prints something like 'The user won!'
Any help or idea would be appreciated. Thanks!

Something like this would work. If It is what you need.
const user = userInput => {
userInput = userInput.toLowerCase();
if(userInput === 'rock' || userInput === 'paper' || userInput === 'scissors'){
return userInput;
} else {
console.log('error');
}
}
function computer() {
const random = Math.floor(Math.random() * 3);
switch(random){
case 0 : return 'rock';
break;
case 1 : return 'paper';
break;
default : return 'scissors';
}
};
// Here is where you need to change something
const determineWinner = (userChoice, computerChoice) => {
// And use the parameters here:
const choice1 = userChoice;
const choice2 = computerChoice;
if (choice1 === choice2) {
return 'It\'s a tie!';
}
if (choice1 === 'rock') {
if (choice2 === 'paper') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
if (choice1 === 'paper') {
if (choice2 === 'scissors') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
if (choice1 === 'scissors') {
if (choice2 === 'rock') {
return 'Computer wins!';
} else {
return 'You win!';
}
}
};
const userInput = 'rock';
console.log(determineWinner(user(userInput), computer()));
console.log(determineWinner('rock', 'paper'));
console.log(determineWinner('paper', 'paper'));
// For you requirement:
console.log(determineWinner('paper', 'scissors'));
console.log(determineWinner('paper', 'paper'));
console.log(determineWinner('paper', 'rock'));
But if you hardcode the parameters as you requirement suggests then your functions user and computer are not used.

Javascript throws undefined

So i've been trying to learn to code and have been using codeAcademy as as resource. I'm currently doing a Rock, Paper, Scissors exercise and my code runs fine but my last console.log(determineWinner(userChoice, computerChoice));" throws an undefined into the console. Any help would be appreciated.
const getUserChoice = (userInput) => {
userInput = userInput.toLowerCase();
if (userInput === 'rock' || userInput === 'paper' || userInput === 'scissors') {
return userInput;
} else {
console.log('Error!');
}
}
const getComputerChoice = () => {
switch (Math.floor(Math.random() * 3)) {
case 0:
return 'rock';
case 1:
return 'paper';
case 2:
return 'scissors';
}
}
const determineWinner = (userChoice, computerChoice) => {
if (getUserChoice === getComputerChoice) {
return 'the game was a tie';
}
}
if (getUserChoice === 'rock') {
if (getComputerChoice === 'paper') {
return 'computer won!';
} else {
return 'you won!';
}
}
if (getUserChoice === 'paper') {
if (getComputerChoice === 'scissors') {
return 'computer won!';
} else {
return 'you won!';
}
}
if (getUserChoice === 'scissors') {
if (getComputerChoice === 'rock') {
return 'computer won!';
} else {
return 'you won!';
}
}
const playGame = () => {
const userChoice = getUserChoice('rock');
const computerChoice = getComputerChoice();
console.log(`You threw: ${userChoice}`);
console.log(`The computer threw: ${computerChoice}`);
console.log(determineWinner(userChoice, computerChoice));
};
playGame();

Ignoring a small syntax mistake in the code you posted here, the problem with the non-working code is that in the function determineWinner, you've two variables named userChoice and computerChoice. But, wrongly, you are using getUserChoice and getComputerChoice.
const getUserChoice = (userInput) => {
userInput = userInput.toLowerCase();
if (userInput === 'rock' || userInput === 'paper' || userInput === 'scissors') {
return userInput;
} else {
console.log('Error!');
}
}
const getComputerChoice = () => {
switch (Math.floor(Math.random() * 3)) {
case 0:
return 'rock';
case 1:
return 'paper';
case 2:
return 'scissors';
}
}
const determineWinner = (userChoice, computerChoice) => {
if (userChoice === computerChoice) {
return 'the game was a tie';
}
if (userChoice === 'rock') {
if (computerChoice === 'paper') {
return 'computer won!';
} else {
return 'you won!';
}
}
if (userChoice === 'paper') {
if (computerChoice === 'scissors') {
return 'computer won!';
} else {
return 'you won!';
}
}
if (userChoice === 'scissors') {
if (computerChoice === 'rock') {
return 'computer won!';
} else {
return 'you won!';
}
}
}
const playGame = () => {
const userChoice = getUserChoice('rock');
const computerChoice = getComputerChoice();
console.log(`You threw: ${userChoice}`);
console.log(`The computer threw: ${computerChoice}`);
console.log(determineWinner(userChoice, computerChoice));
};
playGame();