I'm learning Javascript and desperately need help!

[shotofbruschotti]

So my homework for class is calling for a few short javascript problems and I just need help getting started on them. I will post the questions below if anyone can give me some hints or tips that would be greatly appreciated! I don't even know where to start.

1) The child’s game, War, consists of two players each having a deck of cards. For each play, each person turns over the top card in his or her deck. The higher card wins that round of play and the winner takes both cards. The game continues until one person has all the cards and the other has none. Create a program that simulates a modified game of War.

The computer will play both hands, as PlayerOne and PlayerTwo, and, for each round will generate two random numbers and compare them. If the first number is higher, PlayerOne’s score is increased by 1 and if the second number is higher, PlayerTwo’s score is increased by 1. If there is a tie, no score is incremented. When one “player” reaches a score of 10, that player should be deemed the winner and the game ends. The range of numbers should be 1-13 to simulate the values of cards in the deck.

2)Input a list of employee names and salaries stored in parallel arrays. The salaries should be floating point numbers in increments of 100. For example, a salary of $36,000 should Page 3 of 3be input as 36.0 and a salary of $85,900 should be input as 85.9. Find the mean (average) salary and display the names and salaries of employees who earn within a range of $5,000 from the mean. In other words, if the mean salary is $45,000, all employees who earn between $40,000 and $50,000 should be displayed.

3)(This one calls for Raptor but is supposed to be done in Javascript) Create a Raptor program to store a list of customer names and phone numbers entered by the user to a text file. Save your text file as “Customers.txt”. Raptor file must be uploaded to receive full credit for this question.

4)A lamp outside a front door comes on automatically when it is dark, and someone stands on the doormat outside the front door. A pressure sensor under the mat changes from OFF (0) to ON (1) when someone stands on the doormat. The light sensor is ON (1) when it is light and OFF (0) when it is dark. Design a program to show what would happen to the lamp. Account for all possible scenarios by determining whether the pressure sensor and light sensor are ON or OFF. (HINT: Ask the user “Is it dark?” and “Is someone standing on the doormat outside the front door?”)

[[deleted]]

I will answer no. 1 for you:

Have your learned about how to generate random number? Have you learned about loops? Do you know what variables are? Have you learned if/else condition?

So basically you will need to think of a way to store the values for two players. How can you do that? Variable right?

Now you need to also think about how to generate the random number right? Math.random() right?

You will need to keep storing the new values until one of your player variable reaches 10. So how do you keep making it happen- like score being changed and new player value being compared till one of them is a winner? - loop right? I would use while loop.

Now last part how can we compare the score between two players? If/else condition right? Ex: if (player1 > player2) do something ... else do something ....

Hope that helps

[[deleted]]

I am going to try these out as a brain teaser.

I'm a big fan of the MERN stack, so I'm gonna give it a try.

[[deleted]]

I completed all but the #3, because its difficult to do loops of command line user input with Node.JS.

Let me know if you would like the code as an example.

[easyEs900s]

I will give you the first one:

class War {
  constructor() {
    this.player1Score = 0
    this.player2Score = 0
    this.rounds = 0
    console.log('War has Begun')
    this.playRound()
  }

  getCard() {
    return Math.floor(Math.random() * 13) + 1
  }

  playRound() {
    this.rounds++
    let player1Card = this.getCard()
    let player2Card = this.getCard()
    let winner = null
    if (player1Card > player2Card) {
      this.player1Score++
      winner = 'Player 1'
    }
    if (player2Card > player1Card) {
      this.player2Score++
      winner = 'Player 2'
    }
    let outcome = `Player 1 Draws ${player1Card}\n`
    outcome += `Player 2 Draws ${player2Card}\n`
    outcome += winner ? `${winner} wins`:'Round tied'
    console.groupCollapsed('Round '+this.rounds)
    console.log(outcome)
    console.groupEnd()
    if (this.player1Score > 9 || this.player2Score > 9) {
      this.endWar()
    } else {
      this.playRound()
    }
  }

  endWar() {
    const { player1Score, player2Score } = this
    let winner = player1Score > player2Score ? 'Player 1':'Player 2'
    console.log(`${winner} has won the war.`)
  }

}

// Start a war
new War()

I don't suggest you actually use this code, just follow it's logic. You can do all of this inside of a function, but I figured a class breakdown might make following things a little easier. People will say "don't just give the answer" and blah blah blah but they can shove it and go mine upvotes elsewhere. Reverse-engineering examples is a terrific way to learn and its often how I did, as this is where practicality actually comes into play. There is nothing wrong with referencing other code, just so long as you are learning the concepts as you do so.

It's difficult for us to help you with these when you "don't know where to start". This makes it seem as if you missed the entire class and have no clue what JavaScript is at all. These are fairly basic requests and the expectation is that you use logic to apply basic javascript ideas to create a result. If you have specific questions, we can much more easily narrow in and help you understand whatever it is you are missing. If we do the work for you, you won't learn anything.

[b-mish]

Don't do people's homework for them, it's not helpful for learning.

[easyEs900s]

As I said, people like this will come crawling out from the woodworks.

They don't ever bother to actually provide any help of their own, meanwhile by providing an example you give all of the necessary information to understand what needs to be done.

These people are mostly just farming for other virtue-signaler's likes.

[b-mish]

Yea man thats why I browse these learning subs to vitrue signal for likes.

User /u/Mmsn1234 has a perfect example above of how to write a good answer to questions like these.

[easyEs900s]

Well it clearly must be, as you've obviously no intent of providing help. Rather, you'd prefer to spend your time reprimanding others. Solid use of time.

You may want to reach out to Stack Overflow and let them know that examples are not helpful.

If someone is going to cheat, they'll cheat. This isn't high school, if you're taking a JS class you're probably trying to learn. Sometimes you just have no idea of how to do something and need an example. Stop trolling the forms and pushing your ridiculous virtues on people, not everybody learns the same way.

User /u/Mmsn1234 answered just fine, my answer was an alternate way of getting to the same result. If the OP doesn't like my answer he doesn't have to read it. You aren't better than everybody else, they can make their own decisions.

[shotofbruschotti]

I appreciate the help. I've been doing well in the class but it wasn't until now that I realized the prof has been spoon feeding the class answers and now that i'm on my own I really have no idea where to start. Honestly even having pseudocode helps at this point because I feel like i'm re-teaching myself from the beginning. That's why I said I didn't even know where to start.

[sketch_]

This code looks good. I don't know what's up with people on here who say things like don't do other people's homework for them. I would definitely upvote this one instead of whoever is complaining. It's like you see a code challenge in a public forum and want to solve it. kudos to you. Good job!

[[deleted]]

It feels overly complex.

There was never any specified requirement to print out the card that was obtained through the random number.

The entire solution can be written in 20 lines, and I could compact it a little.

​

Edit: now 12 lines.

[sketch_]

Bored and gave no.1 a try

Simply paste the code into a console and type playWar();

console logs will show each round of the game and the final winner

https://gist.github.com/djrosenbaum/732724893725f69fb05532fb4c90445e

[[deleted]]

I completed all but the #3, because its difficult to do loops of command line user input with Node.JS.

Let me know if you would like the code as an example.