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switch(ZZ,ZZ,VisibleList) -- copy a list, switching two elements

Synopsis

Description

i1 : switch(3,9,0..10)

o1 = (0, 1, 2, 9, 4, 5, 6, 7, 8, 3, 10)

o1 : Sequence
i2 : switch(0,-1,0..10)

o2 = (10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0)

o2 : Sequence