Re: The best way to copy a list?

Is using `lmap` the best way to copy a list? For example:
      package require struct::list 1
     set a {a bc def ghij klmno}
     # is the following the best way to copy a list?
     set b [lmap x $a {expr {$x}}]
     puts "a={$a} b={$b} a==b=[struct::list equal $a $b]"
 Output:
      a={a bc def ghij klmno} b={a bc def ghij klmno} a==b=1