grammar

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

    I was going thru some old stuff and I came
      across something like this:
      
      % if [[ $path ]] echo $path
      
      ... it works, which makes me uncomfortable because it ain't good
      grammar.  Or is it?  Without the usual:
      
      if [[ ]]; then
      
      fi
      
      ... I'm surprised that it works.  Perhaps it ends up being exactly
      like:
      
      [[ $path ]] && echo $path     ?
      
       Should I view the 'then ... fi' grammar  as just optional code
      block controllers?
      
      And:
      
      (( length > max )) && length=max
      
      ... is there a shorter syntax for that?  I'll bet there is.