# FAQ: Methods, Blocks, & Sorting - Call It!

This community-built FAQ covers the “Call It!” exercise from the lesson “Methods, Blocks, & Sorting”.

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## FAQs on the exercise Call It!

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Can i get some examples of “call it” please?

ex.

def array_of_10
puts (1…10).to_a
end

Call to method…

``````array_of_10()
``````

Output

``````[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
``````

I can never remember which range operator is inclusive and which is exclusive. Above the assumption is `...` is inclusive.

Edit

Gets me every time. I had a hunch that `...` is exclusive, and `..` is inclusive. The output above should read,

``````[1, 2, 3, 4, 5, 6, 7, 8, 9]
``````

To include the `10`, use

``puts (1..10).to_a``
1 Like

THANK YOU SOOO MUCH!!! You are a code savior!! I have tried both ways with “`...`” and “`..`”!

2 Likes

You’re welcome!

Another gotcha that made me go back and check…

``````def array_of_10
``````

The above signature line has no parameter. That means we can call it without an argument list…

``````array_of_10
``````

This Ruby stuff may be fine for children, but us grown-ups are always on the hook where those binary decisions have to be made. (LOL)

``````def array_of_10
(1..10).to_a
end

puts array_of_10
``````
``````[1, 2, 3, 4, 5, 6, 7, 8, 9]
``````

And getting into more fun stuff…

``````puts array_of_10.map {|x| x * 2}
``````

Output

``````[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
``````

The array_of_10 method is truly a reusable object in every regard. And nary an assignment.

1 Like