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Start your free trialTrevor Maltbie
Full Stack JavaScript Techdegree Graduate 17,021 PointsCorrect/Wrong Arrays Print As Undefined
Previewing this code gets everything right except the correct and incorrect arrays print as ":undefined" and "undefined" respectively.
I tried using template literals around buildList but that didn't fix anything. I also tried removing the initial declaration of the html variable as Dave did but again that did not fix anything. I'm at a loss. There must be a typo somewhere.
const quiz = [
['How many moons does Earth have?', 1],
['How many eyes does a spider have?', 8],
['How many states in USA?', 50]
];
let correct = 0;
let question;
let answer;
let response;
let correctArray = [];
let wrongArray = [];
let html;
function print(message) {
const outputDiv = document.getElementById('output');
outputDiv.innerHTML = message;
}
function buildList(arr) {
let listHTML = '<ol>';
for (let i=0; i < arr.length; i++) {
listHTML += `<li> ${arr[i]} </li>`;
}
listHTML += '</ol>';
}
for(i=0; i<quiz.length; i++) {
question = quiz[i][0];
answer = quiz[i][1];
response = parseInt(prompt(question));
if (response === answer) {
correct++;
correctArray.push(question);
} else {
wrongArray.push(question);
}
};
html = `You got ${correct} answers right.`;
html += '<h2>You got these questions correct:</h2>:';
html += buildList(correctArray);
html += '<h2>You got these questions incorrect:</h2>';
html += buildList(wrongArray);
console.log(correctArray); // this test was successful, console shows the correct questions.
// still get undefined in the DOM though.
print(html);
Steven Parker
231,269 PointsSteven Parker
231,269 PointsI think you meant to post this in the "JavaScript" category. You can change it using "Edit Question", which is revealed by clicking on the small grey rectangle with the 3 dots in it.