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schemenested-listschicken-scheme

How to create a list of lists in scheme?

I may have missed this in the R5RS document but how do I create a list of lists in (Chicken) Scheme? I want to be able to take a list, a, invoke (list-ref a b), assign the result to c, and then invoke (list-ref c d), where b and d are index values.

Edit: For clarification, suppose I have these lists:

(define citrus (list "oranges" "limes"))
(define apples (list "macintosh" "rome" "delicious"))

And then I want to create a list called fruit with the citrus and apples as list entries.

Solution

  • If you want to make a list containing those lists, just call list with them as arguments:

    (define fruit (list citrus apples))

(list-ref (list-ref fruit 0) 1)
=> "lime"