Category:Initlib: Difference between revisions
transpose
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Line 92:
}.
/transpose {
[ exch {
{ {empty? exch pop} map all?} {pop exit} ift
[ exch {} {uncons {exch cons} dip exch} fold counttomark 1 roll] uncons
} loop ] {reverse} map
}.
% [[1 2 3 4 ] [5 6 7 8] [9 10 11 12]] transpose
/all? {
{
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