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|
| Author |
Message |
| 23 new of 37 responses total. |
papa
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|
response 15 of 37:
| 
Mar 1 04:47 UTC 2017 |
I don't think you can do it with one grep command. You
have to check each line of widgets for no match.
In bash or sh, something like this should work:
cat widgets |while read w; do grep -q $w widgetlist; if
test $? -eq 1; then echo $w; fi done
That runs grep for each line in widgets & detects no match
by checking for exit code ($?) of 1.
|
papa
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|
response 16 of 37:
|
Mar 1 04:52 UTC 2017 |
Same code "pretty-printed" instead of one-lined:
cat widgets | while read w
do
grep -q $w widgetlist
if [ $? -eq 1 ]
then
echo $w
fi
done
|
unicorn
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|
response 17 of 37:
|
Mar 1 05:39 UTC 2017 |
Actually, that's what the -f option is for, but if you're looking for
the widgets that aren't in the file instead of the ones that are, you
need to use -v with it:
grep -vf widgets widgetlist
If you use the -v and -f together, make sure the v comes before the f,
since widgets is an argument for the -f option. If you use -fv, you'll
be grepping for the letter v in both files, which isn't what you want.
You could also use:
grep -v -f widgets widgetlist
or
grep -f widgets -v widgetlist
|
unicorn
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|
response 18 of 37:
|
Mar 1 06:04 UTC 2017 |
I just reread resp:14, and I think you want the reverse of what I said.
It should be:
grep -vf widgetlist widgets
That will find which lines are in widgets that aren't in widgetlist.
|
kentn
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response 19 of 37:
|
Mar 1 16:49 UTC 2017 |
The unix comm command will also tell you whnt lines are in common or not
between two sorted lists (files). Lots of options (e.g. in one list and
not the other).
|
unicorn
|
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response 20 of 37:
|
Mar 2 03:17 UTC 2017 |
I also misstated what -fv would do, if mistakenly used instead of -vf.
I said it would grep for the letter v, but it would actually look for
a pattern file called v to find its patterns to match. Sorry for the
confusion.
|
tod
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|
response 21 of 37:
|
Mar 4 04:54 UTC 2017 |
re #16
super thanks
re #19
How would you script that?
Hadn't thought of comm
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kentn
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response 22 of 37:
|
Mar 5 02:00 UTC 2017 |
Here is an example:
widgets:
widget1
widget2
widget3
widget8
widgetlist:
widget1
widget2
widget3
widget4
widget5
widget6
widget7
#Print only lines present in both file1 and file2.
comm -12 widgets widgetlist
widget1
widget2
widget3
#Print lines in file1 not in file2, and vice versa
comm -3 widgets widgetlist
widget4
widget5
widget6
widget7
widget8
Scripting might include sorting the two lists, but the comm
command itself is pretty easy.
|
deejoe
|
|
response 23 of 37:
|
May 30 00:15 UTC 2017 |
The Debian package 'moreutils' has a command 'combine' that apparently can
be used for this sort of thing. It's probably available for other systems,
or from source (of course).
|
cross
|
|
response 24 of 37:
|
May 30 00:53 UTC 2017 |
`moreutils` is actually the GNU package name. I added it on grex.
|
ryan
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response 25 of 37:
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Nov 11 12:58 UTC 2018 |
often times `less` is `more`
|
walkman
|
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response 26 of 37:
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Sep 25 11:20 UTC 2019 |
We can be heroes. Just for fifteen minutes.
https://tinyurl.com/y3oscsgm
|
walkman
|
|
response 27 of 37:
|
Oct 5 23:06 UTC 2019 |
https://www.youtube.com/watch?v=WrHldIbkeZw
|
tod
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response 28 of 37:
|
Oct 12 05:03 UTC 2019 |
re #26
She Called Aspergers Her Superpower
Each Parent Organ Grinders
https://www.youtube.com/watch?v=5zLU_6nBc4E
|
walkman
|
|
response 29 of 37:
|
Oct 21 16:40 UTC 2019 |
The idea that we must prop up a mentally ill teenage girl as an
authority on climate science is so fundamentally absurd.
Then again, she is also being propped up like a climate messiah.
Does that work for all 16 year old girls?
Where does one apply to speak to the UN Assembly?
https://tinyurl.com/y2kw6rew
|
cross
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|
response 30 of 37:
|
Oct 21 17:42 UTC 2019 |
I found her annoying. Doesn't mean she's wrong, though. The
science really is settled; she's just pissed in a weird way
that people don't take that seriously.
|
tod
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|
response 31 of 37:
|
Oct 24 02:20 UTC 2019 |
It would have been more powerful if Axl Rose said it
|
walkman
|
|
response 32 of 37:
|
Oct 27 21:42 UTC 2019 |
"The science really is settled"
That's quite the contradiction.
At any rate, now that it's a closed case, it's time to end funding for
climate research.
|
papa
|
|
response 33 of 37:
|
Oct 28 21:31 UTC 2019 |
resp:30
--> item:environment:47
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papa
|
|
response 34 of 37:
|
Apr 22 22:19 UTC 2021 |
[Performs a ritual summoning the spirits of Backtalk to return.]
|
rak
|
|
response 35 of 37:
|
Apr 24 14:18 UTC 2021 |
[pop]
I guess this spirit can appear and make his first ever backtalk post.
I looked through many of the conferences and archives, and I really
wish backtalk were as active as it once was.
I am curious to see usage stats for grex and backtalk these days.
`last` reveals the same handful of users most times I check it,
while ps shows that about a dozen non-system accounts have jobs
running.
Also: someone should perhaps write a cron job that kills abandoned
pnewuser processes. There are 34 of them still running going back
to January.
[poof]
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papa
|
|
response 36 of 37:
|
Apr 27 00:44 UTC 2021 |
resp:35
I didn't think that would actually work!
;)
|
walkman
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|
response 37 of 37:
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Apr 29 15:24 UTC 2021 |
"So we go inside and we gravely read the stones
All those people, all those lives, where are they now?
With-a loves and hates and passions just like mine
They were born, and then they lived, and then they died
Seems so unfair, I want to cry" ~ Morrissey
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