Text 67924, 137 rader
Skriven 2012-02-07 22:12:00 av Ed Vance (8943.windowsa)
  Kommentar till text 67900 av PAUL QUINN (3:640/384)
Ärende: Re: 2012
================
PQ>Hi! Ed,

Hi Paul,

PQ>On Sat, 04 Feb 12, you wrote to me:

PQ> EV> Redirection, Yep! I played with it a little bit.
PQ> EV> But I learned NOT to use the < sign, I tried using it with a File
PQ> EV> Name and the Find command (or maybe it was the Sort command) and the
PQ> EV> results wasn't what I expected because I had the wrong 'sign' in the
PQ> EV> 'wrong' place.

PQ>That's half the fun of pottering around at the command-line.  A lot of what
PQ>been uncovered in DOS operations has been by the good old trusty 'trial &
PQ>error' method, particularly when using other tools besides those provided by
PQ>MS-DOS (or whatever).

Part of how I learned DOS was from a disk called DOS Help! 4.0 by
Flambeaux Software, Inc.

I got their DOS Help! 5.0 and 6.2 versions also.

I also bought a book from Radio Shack about DOS, can't remember it name.

PQ> EV> I still use the > sign and >> sign sometimes.

PQ>I cheated.  A lot of my BATch files use scripting similar to this...

PQ>--8<--------C-U-T--H-E-R-E------------
PQ>:: [3.09] Test for job's LOG file,
PQ>  IF EXIST %UTILSLOG% GOTO ISTHERE
PQ>    :: Else...
PQ>    GOTO NOT_HERE
PQ>  :ISTHERE
PQ>    Echo ##========TOSSER====TASK==== >>%UTILSLOG%
PQ>    GOTO TOTOSS
PQ>  :NOT_HERE
PQ>    Echo ##========TOSSER=====TASK==== >%UTILSLOG%
PQ>    GOTO TOTOSS
PQ>------------C-U-T--H-E-R-E-------->8--

PQ>That way, it doesn't matter whether the file (%UTILSLOG%) is there yet, one
PQ>or t'other, it will get used.  Doing 'input' with the other angle-doover, "<
PQ>can be enlightening too.  =:)

Two > marks will Append to a existing file or make a new file.

One > mark will begin a new file, IIRC also erasing the existing one.

PQ> EV> I will use the Pipe | sometimes with MORE.
PQ> EV> That's as much as I am comfortable doing with the Redirection
PQ> EV> command.

PQ>Piping is a bit more weird and, like you, I have not got a good grip on its
PQ>notion.  Sometimes when things work or not, the act of using a pipe seems ti
PQ>to the phase of the moon, or, the prevalence of sunspots.  (I had such an
PQ>occurence recently with a doo-hickey that worked during testing on the Satur
PQ>& Sunday, but, when it came time to run on the following Friday, the bloody
PQ>thing wouldn't!  And, wouldn't work on any day thereafter since.)

Ouch!, that hurts.

All I've mostly used the Pipe command for is TYPE filename | MORE when
what I could see on the screen was the bottom of the file that I TYPE'd.

PQ>I've only been at it, on & off, for just under 20 years, so, there's still
PQ>plenty of time yet to keep learning.  :)

March 1984 I started with a C=64, but I was learning DOS before I got
the IBM Compatiable in Feb 1994. because I found a GT POWER BBS phone
number and started reading echos about MS-DOS and later MS Windows.

Later on, a ITT-DOS 2.11 XT computer, hand me down from the boss's
office because they got a Zenith 286 3.x box, came to my work area along
WITH THE BOOKS!, so I read the books and tried out the Examples in the
books on the 2.11 box.

Later on the Zenith replaced the ITT, by the time I retired in 1996 a
386 PC with MS-DOS 5.0 (? may have been 3.3?) and Windows 3.1 had
replaced the Zenith PC.

I can't remember which of the boxes I started using my DOS Help! 4.0
5-1/4" floppy disk on, but that disk and the Radio Shack book helped me
greatly to understand Microsofts version of DOS.

I said that, because the 5-1/4" Commodore 1541 Floppy Disk Drive had a
DOS (Disk Operating System) in it.   ;-)

It took me a while to understand the commands in the 1541 book back in
1984 because on the pages for the different DOS commands it would
begin with PRINT# 15 at the top of each page, and when I tried it,
nothing happened until after I read the 'First Page' of the book that
said to first type OPEN 15,8,15 to wake the disk drive up.

After I learned 'that' the Disk drive would do what I was expecting it
to do.

PQ> EV> When I got started using MS-DOS 5.0 there was a command called
PQ> EV> Recover that would really mess up any disk it was used on if a Path
PQ> EV> Name was given when using it.

PQ>I don't recall that one.  I was just starting to use Windows 3.xx and any GU

DOS Help! 6.2 says RECOVER is a OBSOLETE command and DANGEROUS to use
and wasn't included anymore, "it was dropped from DOS altogether".

PQ>tool I could lay my hands on at about that time.  Didn't MS-DOS 4.xx and 5.x
PQ>-not- last very long?  It's just that MS-DOS 6.xx seemed to come along sudde
PQ>and the others were kind of a blur.  Mind you, I wasn't doing a lot of DOS
PQ>batching stuff till version 6.  That's probably why I don't remember much of
PQ>versions 2-through-to-6.

Version 4 seemed to me like it was around for a spell.
Same for Version 5.
Version 6 had a few quick .xx number changes, one of them because of a
lawsuit.

TTBOMK 6.0 and maybe another increment in the 6. series was out when I
got my own MS-DOS box in 02/1994. but I had read so much in the computer
magazines of folks having problems with 6.x I didn't want it, I wanted
5.0 on a 5-1/4" floppy for my A:\ drive.

PQ> EV> I put it on a Floppy disk for safe keeping and Deleted it from the
PQ> EV> C:\DOS directory so I wouldn't use by mistake.

PQ>Ah, yes.  I can remember doing that with Fdisk & Format just in case the kid
PQ>or wife may have ever strolled into the DOS directory.

The DIRCMD enviromental variable is one setting I have had on all my
NON-CBM computers.

DIRCMD=/O:GNE/A/P  is the settings I like when I'm on a command line.


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