On 29.06.2022 23:24, David Crayford wrote:
On 30/06/2022 4:22 am, Bernd Oppolzer wrote:
This is an old OS/2 REXX program (from the 1990s, IIRC),
used to traverse a directory tree recursively and issue a command in every
subdirectory found:
/* rexx */
arg command
call RxFuncAdd "SysLoadFuncs", "REXXUTIL", "SysLoadFuncs"
call SysLoadFuncs
dir = directory()
if right(dir,1) = "\" then
dir = left(dir, length(dir) - 1)
call tree dir, command
x = directory(dir)
exit
tree: procedure
arg dir, command
say "*** Verzeichnis in Bearbeitung: "dir" ***"
x = directory(dir)
command
rc = SysFileTree("*.*", verz, "D")
do i = 1 to verz.0
dir = word(verz.i, 5)
call tree dir, command
end
return
you may notice the recursive call of the procedure "tree".
I don't see any justification for your REXX bashing;
it's just another flavor of scripting language, which allows to do great things,
once you manage to use it.
Sorry Brend, but I don't consider that snippet to be great! It's a perfect example of flabby,
verbose REXX code. The only justification for using REXX is that you personally favor the
language. Python is far more succinct.
|for| |root, dirs, files ||in| |os.walk(path_of_the_directory):|
|||for| |i ||in| |files:|
|||print||(os.path.join(root, i))|
Just having to use those vertical bars to explicate how the Python code has to be formatted
(indented) in order for it to work correctly is quite distorting.
Also the Python os module is quite extensive and hard to gain and keep an overview of the
functionality it offers. [1]
---
Here a version of sysFileTree (also available in Regina's regutil package if not mistaken) that
lists all files in all subdirectories:
call sysFileTree "*.rex", "files.", "FSO"
do i=1 to files.0
say files.i
end
Simple. REXX.
Here a version using ADDRESS...WITH and the operating system's dir command.
cmd = "dir *.rex /b /s"
ADDRESS SYSTEM cmd WITH OUTPUT STEM files.
do i=1 to files.0
say files.i
end
Simple. REXX.
---rony
[1] "os — Miscellaneous operating system interfaces":
<https://docs.python.org/3/library/os.html>
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