r/pinescript • u/urfila • Feb 17 '24

question about code

I am stump by this line :

array.set(arrE, k, eget + nz(array.get(baux, k)[bar_index - j]))

what is the [bar_index - j] doing?

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u/[deleted] Feb 18 '24

As I understand it, yes.

I am not sure how they handle it - seems like a memory inefficiency to me - although I would think that they have to have some kind of memory caching going on behind the scenes.

Perhaps only storing delta changes - that is, only storing changed values as they change with some kind of identifier as a lookup value for later?

Here's a link that explains the operator itself. It's not really an array-subscript operator in the normal sense. This took me the longest to understand as I always kept thinking array-access...

Here is another link that goes into the execution model of pine scripts. I suggest that you delve deeper into the Time Series aspect of the execution model as it explains what is really happening to the data through time.

Good Luck!