Add Python Slicing documentation entry

[ikappaki]

Hi,

Could you please consider a patch to add documentation for Python slicing? This has come up a few times in Discussions, and without guidance, it might take users a while to understand how slicing is achieved in Basilisp.

Thanks

[chrisrink10]

Seems like a good addition.

I don't see any obviously good macro solution for generic slicing. The fact that all 3 attributes can be omitted makes figuring out a generic solution.

[ikappaki]

Seems like a good addition.

I don't see any obviously good macro solution for generic slicing. The fact that all 3 attributes can be omitted makes figuring out a generic solution.

Thinking about it, it might be a good idea to add a simple aslice (array slice) macro that translates to (aget coll (pyton/slice args...)). This would eliminate the need to call aget directly. Would you be open to supporting this? If so, I can raise a ticket/PR.

e.g., (aslice coll 1 5 2)

thanks

[chrisrink10]

@ikappaki I would accept a ticket/patch adding this function to basilisp.core. I do think the interface of such a method is somewhat messier than the corresponding Python construct.

For example, if you want to take a slice of every 2 elements in a list, the leading nils would be required:

(aslice coll nil nil 2)