[9fans] Non-parallel loop in Sam

["Hongzheng Wang" <wanghz@gmail.com>]

Hi all,

I'm new to Plan9 and also this mailing list.

After some experience with Sam's structral regexp, I become quite
interested in this editor command.  And I also noticed that the loop
and condition commands of Sam, say x, y, g, v etc, are somewhat
different from the commands of ed.  For example, all changes in a x
command execution occure simultaneously, rather than the model used by
ed where each change would  be made at once even in a g command
execution.  As a result, some tips in ed, such as ',g/^/m0' to invert
all lines of a file, would be invalid.  My question is, how to
impliment non-parallel loop/condition commands in Sam?  In another
word, how to do things, such as inverse all lines, in Sam?

Thanks.

--
HZ