I think this is tongue in cheek. Just re-read: Compare these two examples: print "these people @{[get_names()]} get promoted" and print "these people ", joi

I think this is tongue in cheek. Just re-read: Compare these two examples: print "these people @{[get_names()]} get promoted" and print "these people ", join " ",get_names(), " get promoted" Clearly, the first example wins for code clarity.