Memoize

factor_concat_join

 
IN: scratchpad auto-use { "hello" "my" "name" "is" "SAL" } concat .
"hellomynameisSAL"
 
IN: scratchpad auto-use { "hello" "my" "name" "is" "SAL" } " " join .
"hello my name is SAL"
 

http://docs.factorcode.org/content/word-concat,sequences.html

http://docs.factorcode.org/content/word-join,sequences.html