Mac OS X Panther in a Nutshell, 2nd Edition

Name

foreach

Synopsis

                     foreach 
                     name 
                     (
                     wordlist
                     ) 
                     commands
                     end
                  

Assign variable name to each value in wordlist and execute commands between foreach and end. You can use foreach as a multiline command issued at the shell prompt (first of the following examples), or you can use it in a shell script (second example).

Examples

Rename all files that begin with a capital letter:

% foreach i ([A-Z]*)
? mv $i $i.new
? end

Check whether each command-line argument is an option or not:

                     foreach arg ($argv)
                        # does it begin with - ?
                        if ("$arg" =~ -*) then
                           echo "Argument is an option"
                        else
                           echo "Argument is a filename"
                        endif
                     end