Build a Quiz Game: getResults

JavaScript
1

The previous topic “Build a Quiz Game: getResults” has been locked. I am having an issue with the last two steps 13 and 14. The task does not agree with the comparison method.

let rand = Math.floor(Math.random() * 5 )
let randomized = Math.floor(Math.random() * 3 )

let questions = [
  {
category : "Japanese",
question : "What does 'Gokiburi' means?",
choices : ["Cockroach", "Fly","Ant"],
answer : "Cockroach"
  },
  {
category : "Science",
question : "What is the name of the name of the coolest star?",
choices : ["Red Dwarf","Pixie","Bat"],
answer : "Red Dwarf"
  },
  {
category : "Math",
question : "What is the square root of 100?",
choices :  ["10","0","2"],
answer : "10"
  },
  {
category : "History",
question : "When the second World War has ended?",
choices : ["1945","1949","1941"],
answer : "1945"
  },
  {
category : "Art",
question : "Who drew the Mona Lisa?",
choices : ["Leonardo DaVinci","Agatha Christie", "Salvador Dali"],
answer : "Leonardo DaVinci"
  }
]

//Random question
const getRandomQuestion = (arry) => {

return arry[rand]

}

//Random Choice based on asked question
const getRandomComputerChoice = (arry) => {

return arry[randomized]

}

//Comparing select answer vs. correct answer
const getResults = (quiz,select) => {

let correct = quiz.choices[0] // Tried direct assignment, but no luck

console.log(typeof(quiz.question))  //String
console.log(typeof(select)) // String

if(correct == select){ //Conditional works for both scenarios
  //The format is correct according to step 12
  return "The computer's choice is correct!" 
} else{
  // The format is correct (copy/paste for double check) but step 13 says it is not
  return `The computer's choice is wrong. The correct answer is: ${correct}`
  
}

}



let trivia = getRandomQuestion(questions)
let reply = getRandomComputerChoice(trivia.choices)
let result = getResults(trivia,reply)

//Checking function outputs
console.log(trivia)
console.log(reply)
console.log(result)
2

If you have a question about a specific challenge as it relates to your written code for that challenge and need some help, click the Get Help > Ask for Help button located on the challenge.

image
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The Ask for Help button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

3

Thanks for the tip. I will do that in the future, however, I do not want to create a duplicate thread.

The least I can provide is the link to the task

JavaScript Certification - Build a Quiz Game

4

Thanks. Can you describe the problem you’re having?

5

What if questions was replaced with a new set of trivia?

Would your program still work?

let questions = [
  {
category : "Japanese",
question : "What does 'Gokiburi' means?",
choices : ["Fly","Ant", "Cockroach"],
answer : "Cockroach"
  },

Replace questions with this and see if your program still works.

6

It didn’t work. After applying that code, steps 11,12 failed as well. It seems that comparison step should be interpreted differently. The values in the array of “choices” are string, the correct “answer” is also string. I tried typeof() to identify the type of variable, both correct answer value from “choices” array and the “answer” value are strings.

7

This wasn’t to fix your program, it was to show you what’s wrong.

Don’t run the tests, use the program and see what’s happening.

What if the first item in choices is not the answer? Your program still needs to work.

Is there a different way you can access the answer ?

8

I managed to complete the task. Thanks for the help. Here is the breakdown how I did it, I compared the index of the correct answer and the random answer

let correct = quiz.answer
let options = quiz.choices.indexOf(correct)


if(quiz.choices.indexOf(correct) == quiz.choices.indexOf(select)){
  return "The computer's choice is correct!"
} else{
  return `The computer's choice is wrong. The correct answer is: ${quiz.choices[options]}`
}
9

It’s interesting but why compare the indexes and not the strings quiz.answer and select?

Why use ${quiz.choices[options]} and not quiz.answer ?

10

Good point.
After fixing the conditional, I tested out the ${quiz.choices[options]} to confirm if the false conditional variable is accepted…I can reformatted the variable to $quiz.answer and it was accepted.
Besides, the task did not say that the failed message should contain the correct answer from the answer parameter, I only needed to supply the correct answer.
Anyhow, I fixed my code to quiz.answer and the task was finished with no issues. I will reinput my code again

"select" is the second parameter of the function getResult(quiz, select)

let correct = quiz.answer
let options = quiz.choices.indexOf(correct)


if(quiz.choices.indexOf(correct) == quiz.choices.indexOf(select)){
  return "The computer's choice is correct!"
} else{
  return `The computer's choice is wrong. The correct answer is: ${quiz.answer}`
}
11

You need to check if the computer’s choice is the same as the answer. Why compare the indexes and not the strings quiz.answer and select?

Similar to the way you used the string in the final return.

12

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