#!/bin/bash
## by Eugene Reimer  2008-11:
## USAGE EXAMPLE:
##	for DIR in $(find-dirs)   ;do ... done		##for each subdir...
##	for DIR in $(find-dirs) . ;do ... done		##for each dir including this one...
## Typically used in scripts, where you'll sometimes want CURDIR to be included in the result, sometimes not.
## This script does NOT include it.  Rationale: adding a "." is very easily done for when it's wanted, whereas other-way-round would be considerably more hassle.

find -type d  |sort		|	##create the list of dirs, ordered
  sed '/^\.$/d; s|^\./||g'	|	##eliminate line containing just dot, remove leading dot+slash, to simplify output
  tr '\n' ' '  |sed 's| $|\n|'		##newline->space, then revise ending space back to newline  (together exactly what nl2sp does)


exit
Note: the newline-to-space translation isn't needed for such list-of-filenames to work in a bash for-statement, it does however make the result more people-readable;  
it may also make the result useful in a wider variety of contexts, although I'm far from sure about that;  one counter-example involves using such a list as input
to my SetIntersection, SetUnion, etc, scripts, as those require one-name-per-line format.

When working with set-like lists or list-representation sets the need to convert between one-per-line and space-separated forms comes up so often that it begs for a 
pair of one-liner scripts to do those conversions.  I have created those little scripts:  nl2sp  sp2nl;

2010-11-07:  instead of adding a newline, now revises the ending space to newline, to produce a canonic space-separated list, as in nl2sp;