join — Create a string by joining together list elements
join list ?joinString?
The list argument must be a valid Tcl list. This command
returns the string formed by joining all of the elements of
list together with joinString separating each
adjacent pair of elements. The joinString argument defaults
to a space character.
Making a comma-separated list:
set data {1 2 3 4 5}
join $data ", "
→ 1, 2, 3, 4, 5
Using join to flatten a list by a single level:
set data {1 {2 3} 4 {5 {6 7} 8}}
join $data
→ 1 2 3 4 5 {6 7} 8
list, lappend, split
element, join, list, separator
Copyright © 1993 The Regents of the University of
California.
Copyright © 1994-1996 Sun Microsystems, Inc.