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6.1.0430 2SWAP two-swap CORE
( x1 x2 x3 x4 -- x3 x4 x1 x2 )
Exchange the top two cell pairs.
Testing:
T{ 1 2 3 4 2SWAP -> 3 4 1 2 }T
ContributeContributions
NieDzejkob
[40] Suggested reference implementationSuggested reference implementation2018-01-06 18:12:03
: 2SWAP >R -ROT R> -ROT ;
alextangent
-ROT is not in the standard. A reference implementation should (must?) use standard words.
DavidJones
[218] Implement with ROTSuggested reference implementation2022-01-28 10:17:58
: 2SWAP ROT >R ROT R> ;
I have a soft spot for the symmetry in this one.
AntonErtl
As decided at the 2022i meeting : This is the version we want to put in the document.
Closed