CODEWITHSUNDEEP
netlogoagent-based-modeling
lomper
lomper

Reputation: 379

Netlogo: is ´map´ limited to two lists?

When I try the following command on NL 6.1.1:

(map + [1 2 3] [2 4 6] [7 8 9])

I get [3 6 9]as a result instead of [10 14 18], which means that only the first two lists are considered in the sum.

Anyone knows how to correct this and get all three lists to be considered ?

Upvotes: 1

Views: 199

Answers (1)

Jasper
Jasper

Reputation: 2780

Per the documentation in the NetLogo dictionary, the map reporter does support multiple lists, but map expects the provided anonymous reporter to take a number of arguments equal to the number of lists you provide. In your case you cannot use the + shortcut since + takes 2 arguments, and we have 3 lists.

So instead you can do this:

(map [ [a b c] -> a + b + c ] [1 2 3] [2 4 6] [7 8 9])

If you need to handle adding an arbitrary number of lists (as in a list variable that could have 2, 3, 4, or more lists inside of it depending on your program), you can try this out using the reduce reporter:

set vals [[1 2 3] [2 4 6] [7 8 9] [10 11 12]]
reduce [ [a b] -> (map + a b) ] vals

Upvotes: 4

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