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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects Mixing and Matching Arrays and Objects

Posted by Tracy Reith
Tracy Reith
1,894 Points

How does using the identical names for variables and object properties not cause problems?

I noticed in the example that the objects within the array have keys 'question' and 'answer': 

var questions = [
    { 
        question: 'How many states are in the United States?', 
        answer: 50 
    }
];

and also variables are declared using those same names

var question;
var answer;

Eventually these are used together in the for loop

for ( var i = 0; i < questions.length; i += 1) {
    question = questions[i].question;
    answer = questions[i].answer;
    etc. rest of code

Everything works, but why is it not a problem for variables and object keys to have identical names? Is it good practice, bad practice, or personal preference?

1 Answer

Ari Misha
Ari Misha
19,323 Points
Ari Misha
Ari Misha
19,323 Points

Hiya Tracy! You've asked an interesting question which you'll cover in later courses. Its called "variable scopes". I wont spoil it for you but i'd suggest you to stick with it and later you'll get to the topic of "variable scope". As far as best practice goes, at this point of learning , i'd recommend you to not worry about best practices , just focus on the learning part. You can always clean up your code later, right? If you still wanna know about "variable scopes" , just post back and lemme know. (: