munarsharma/timers_assignment

Rock, Paper, Scissors

You tried in the JavaScript workshop, but you were missing one crucial element: callbacks.

Take a look at this:

const readline = require('readline');

const reader = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

reader.question(`sup? \n`, (res) => {
  console.log(`you replied: ${res}`)
});

readline is what's known as a library. Don't worry about what that is, precisely, yet - just know that, like class methods, it's something that Node makes available to us to use how we'd like.

You can see here that we're using callbacks to await a user's response. The first argument of question prints to the console to ask a question, and the second is a callback which handles what our user might say. Once we have that response, our callback fires and we tell them what they wrote.

Using this library, we are going to make a rock, paper, scissors game against the computer. Our finished product should converse something like this:

Console: `Welcome to rock, paper, scissors. Please type 'r', 'p', or 's' to make a choice.`
User: `rock`
Console: `You chose 'rock'. Hmm...` (setTimeout for 5 seconds here to imagine the computer thinking)
Console: `The computer chose 'scissors'.`
Console: `Congratulations! You win!`

...And then the program exits.

A few notes here:

• Use the full extent of the readline library to flesh out your program's functionality.
• The computer should make a random choice (Math.random might be useful here) to come up with their play.
• You should handle wins, losses, and ties.

Bonus

Eliza is one of the world's first chatbots. She uses the user's response to come up with a question, mimicking a not-so-insightful therapist. She never says anything herself - she simply picks a detail the user wrote and asks a new question. Play around with her in the link above and see how this works.

Your task is to use readline to write a simple version of Eliza - a chatbot that can handle any input and return an at-least-sort-of-relevant question.

Hint: When the user says "I" or "I'm" or any word referring to themselves, that's a dead giveaway that the next thing they write will be useful to your response.