% set a {a b c d} a b c d % set b {1 2 3} 1 2 3 % llength "$a $b" 7 % llength [list $a $b] 2
% concat {a b} {c {d e} f} "g h" a b c {d e} f g h
The separator can also be empty:% join {a b c} a b c
% join "what does this string" "" whatdoesthisstring
% split /usr/local/include/X11/X.h / {} usr local include X11 X.h