Maps, different means, ES6

// ES6 Maps

const question = new Map();
// Key value pair is here.
question.set('question', 'What is the name of the latest JS version?')
question.set(1, 'ES5');
question.set(2, 'ES6');
question.set(3, 'ES62015');
question.set(4, 'ES7');
question.set('correct', 3);
question.set(true, 'Correct answer');
question.set(false, 'Please try again');
// Get is different than set.  It's "gets" the value from the const
question.get('question');



if (question.has(4)) {
    question.delete(4);
    console.log('Answer 4 is here.');
}
//clears the entire question.
//question.clear();

console.log(question.get('question'));
console.log(question.size);

// This uses a ForEach loop to print the value/key pair to the console.
question.forEach((value, key) => console.log(`This is ${key} and it's set to ${value}.`));

// This is another way to do the same thing.
for(let [key, value] of question.entries()) {
    console.log(`This is ${key} and it's set to ${value}.`);
}

for(let [key, value] of question.entries()) {
    if(typeof(key) === 'number') {
        console.log(`Answer ${key}: ${value}`);
    }
}

const ans = parseInt(prompt('Write the correct answer:'));

console.log(question.get (ans === question.get('correct')));