splice

splice v -- yields a new list v where any members of v which are sequences are replaced by their elements.

Works also for sequences, and leaves other expressions unchanged. Copying the list v is always done when v is mutable. Certain functions always splice their arguments or their argument lists for the sake of convenience.

     i1 = splice ((a,b),c,(d,(e,f)))
     
     o1 = a,b,c,d,(e,f)
     
     o1 : Sequence

     i2 = splice [(a,b),c,(d,(e,f))]
     
     o2 = [a,b,c,d,(e,f)]
     
     o2 : Array