FAQ: The Refactor Factory - What You'll Be Fixing

Frequently Asked Questions Ruby FAQ
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This community-built FAQ covers the “What You’ll Be Fixing” exercise from the lesson “The Refactor Factory”.

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This exercise can be found in the following Codecademy content:

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2

In step 1, the commented out code says that this will be explained in the last step:

$VERBOSE = nil # We’ll explain this at the end of the lesson.

But it wasn’t explained in the last step. Can someone here give an explanation?

Thanks :slight_smile:

1 Like
3

I had a lot of trouble with this which I finally narrowed down to the following rewrite:

 n <= 0 ? "n must be greater than 0." : Prime.first n

I kept getting “Unexpected tIDENTIFIER”.

The problem is at the end. Prime.first n is a function call, but in this ternary syntax it doesn’t get parsed right. My solution was to use parentheses; both of these work:

 n <= 0 ? "n must be greater than 0." : (Prime.first n)

or

 n <= 0 ? "n must be greater than 0." : Prime.first(n)

I hope this helps someone. I’m a little crabby that the tutorial sprung this unusual function call syntax on me without warning.

4

Thanks. I was having the same problem. I added an expression to make sure that it was also an integer…

(n.is_a? Integer) && n > 0 ? (Prime.first n) : "n must be an integer greater than 0."