Am I Missing Something? Getting Length of Array

So, I have a list of arrays, and I want to loop through the list of arrays, and send a array into the method, and sleep for the amount of notes in the array I’m sending in.

I have been looking for documentation on it, and I can’t find it. The RubyDocs page I found on the array doesn’t have size or length or count that I can find.

I found a workaround where I loop through and count on a variable, then use that, but there has to be a better way. I’m doing this to refactor code, and though I made it modular, I didn’t exactly shrink my code line count at all, so I want a more elegant solution if possible.

Can someone point me in the direction of some documentation?

Edit: Since most of them in the sequence are 2, 3, or 4, I’m going to hardcode them for now, but I would like to figure out how to get the count dynamically still if possible.

Hi Skelly…

I’m no array-mechanic but something like?


flute = [ 76, 74, 80, 76, 76, 80, 74, 78]
puts flute.length
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I must just be having a bad morning. :rofl:

I haven’t really done much with arrays since most of my stuff has just been samples so far, or long single notes.

For the life of me, I could not find a reference to that method anywhere when I was looking for it…

Oh well. Now I know.


If I had a penny for every silly question I’ve ask on this
forum… Sam wouldn’t need a patreon, I’d be funding him
outright. :slight_smile:

Glad to help.


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Thanks again.

I’ll post the thing I’m refactoring when It’s done.

It was in a state where a normie would look at it and go “OH WOW COOL!!! :D” but you guys would notice how much line space I’m wasting. :joy:

That’s what you get for trying to build and compose at the same time.

No shame in using a lot of lines to do a thing. It’s better to use a few more lines and make something comprehensible, that to refactor all the meaning out of your code in an effort to save space.


Hi there,

I’m always using more lines of code than really needed, because it is easier that way to change and reuse stuff than with compact forms.
So, no problem in there.


If you haven’t found the answer yet, I just came across the same issues. It’s rather simple…

myArray = [ 1, 2, 3, 4, 5, 6]

myArray.count returns 6 as the number of items inside the array

Does it work for rings, too?

If you create an array first…

notes = [36 , 42 , 36 , 30]

then use .ring to play through the list…


you have your ring of notes. You can now get the count with…


which will return 4 as the count

You can now get the count with…


@tvolikas/@Loopiloop - unless I’m missing something, unfortunately not.
Running the following:

puts [36 , 42 , 36 , 30].ring.count

Produces the following error:

Runtime Error: [buffer 9, line 1] - NoMethodError
Thread death!
 undefined method `count' for (ring 36, 42, 36, 30):SonicPi::Core::RingVector

Technically speaking, .length and .size both work, for rings and arrays, so you may use those with either instead.

It’s worth keeping in mind however that functions such as .length, .size, .count etc are not part of the officially supported Sonic Pi language, and are not guaranteed to continue working into the future.

I am planning to update the documentation some time in the not too distant future to hopefully make the difference between Sonic Pi language and that of Ruby (that the Sonic Pi language is based on) clearer, to try to avoid any confusion.

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Ooof… I hope Sonic Pi doesn’t lose the ability to get the count of an array.

Is there any reason why .count wouldn’t remain in Sonic Pi?

There is a possibility, however delayed, that one day the Sonic Pi language may be rewritten in another base language altogether.
A key point to keep in mind is that we would give plenty of notice about such a thing.

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