/dev/chat

Jeff Schaller

01:34

@user2476549 filter, maybe?

Kusalananda

07:01

@user2476549 As @JeffSchaller said, it's a "filter". POSIX actually formally defines a filter as "A command whose operation consists of reading data from standard input or a list of input files and writing data to standard output. Typically, its function is to perform some transformation on the data stream."

When you read piped data, you read from standard input. The pipe itself is just a way of providing the data. It might just as well come from a redirection.

Kiwy

09:51

Hello Chat !

small question, why from a ; separated csv this code :

awk -F";" ' BEGIN { OFS=";"} { print $1 $3 }' filename.csv

doesn't print :
Field1;field3
But :
Field1field3

Kusalananda

@Kiwy Because the values are concatenated with no delimiter ($1 $3). You would have to use either print $1, $3 (preferably), or print $1 OFS $3 (ugly and unnecessary).

Kiwy

@Kusalananda I feel like awk is so good but I can't understand it

thank you

it's working indeed

Kusalananda

awk concatenates adjacent strings. Whitespace between the components that are concatenated does not matter.

@Kiwy With print field1, field2, field3, you're printing a complete record with three fields. awk will insert OFS between the fields and ORS at the end.

Kiwy

11:52

unix.stackexchange.com/q/445728/53092 Who from Stephen or Kusa will get the points on this awk(ward) question

Kiwy

12:17

@StephenKitt I have a problem I can't upvote your answer more than once despite its quality

Stephen Kitt

@Kiwy heh

Kiwy

Thank you I was sure you or Kusa would explain this easilly

Kusalananda

@Kiwy The double output comes from the assignment to JOBID in your code. Any true value would prompt awk to print the current line. awk '1;1 would print every input line twice, for example.

Kiwy

@Kusalananda I though about something like that but couldn't figure where to place the assignement

Kusalananda

@Kiwy @StephenKitt's suggestion is good.

Kiwy

12:41

which one @Kusalananda the one to split filename ?

Kusalananda

@Kiwy To only get the numbers from the filename once per input file.

Kiwy

Indeed it's a great idea

Stephen Kitt

@Kiwy I expanded a bit on the reasoning there

Jeff Schaller

13:10

whew! Glad I typed as quickly as I could ref

Stephen Kitt

Jeff Schaller, USA

28k 8 42 99

Kiwy

@JeffSchaller is a super hero he saves lifes !

Stephen Kitt

needs to be extended with a “Lives saved” counter (alongside the “People reached” counter)

2

Jeff Schaller

@StephenKitt now there's a cool idea for a Winterbash badge

Kiwy

@StephenKitt Thanks I'm starting to like what I understand from awk

Jeff Schaller

13:13

"receives a comment on an accepted(?) answer containing saved .* life"

Kiwy

Or for an aprilfool badges

Stephen Kitt

@JeffSchaller with a medic’s hat

Jeff Schaller

@StephenKitt indeed; an ambulance, or the physician's snake & stick thing

Rod of Asclepius

In Greek mythology, the Rod of Asclepius (Greek: Ράβδος του Ασκληπιού Rávdos tou Asklipioú; Unicode symbol: ⚕), also known as the Staff of Asclepius (sometimes also spelled Asklepios or Aesculapius) and as the asklepian, is a serpent-entwined rod wielded by the Greek god Asclepius, a deity associated with healing and medicine. The symbol has continued to be used in modern times, where it is associated with medicine and health care, yet frequently confused with the staff of the god Hermes, the caduceus. Theories have been proposed about the Greek origin of the symbol and its implications. ��2�...

Kiwy

How those badges are invented on event ? are they solely the fact of the Stckexchange devs or can we submit them ?

Stephen Kitt

Jeff Schaller

13:16

@StephenKitt is that Santa-turned-doctor?

Stephen Kitt

@JeffSchaller ha ha it could be indeed

Jeff Schaller

Ho ho ho! Now what seems to be the life-threatening UNIX emergency, young man?

Kusalananda

@JeffSchaller That would be the response to the "I need help quick!" question we're getting sometimes.

Jeff Schaller

@Kiwy my understanding is that it's some secret meeting of devs, but that's Yet Another Thing I'll Never Keep Track of on Stack Exchange

If we could combine that image with a "fastest gun in the west" gunslinger, we'd have a winner

Nurse Annie Oakley?

Jeff Schaller

15:33

@Kiwy not an answer, but:

15

Q: What is the origin and thought process behind the tradition of hats?

Winter Bash is always a lot of fun and makes people trek across sites and participate in communities they are not usually a part of, but how did they originate? What was the thought process behind introducing this tradition?

discussion winter-bash

15

Q: Is there a simple page, "What is Winter Bash, and what's all this about hats"? Can we have one?

I tried to write a meta post about winter bash and hats, but I couldn't find any simple explanation page to link to. I ended up garbling a home-spun description of my own with a not-terribly-helpful image from 2012. This comment on a separate Meta.math.se thread puts it better than I can: As...

support winter-bash

Stéphane Chazelas

@terdon, about unix.stackexchange.com/a/210166 note -e is the same as --long-iso in ast-open ls, which probably is what that answer was refering to. GNU ls had a -e but that was for --quote-shell. Now removed

Jeff Schaller

15:50

what the?!?! That has to be the fastest 5 upvotes I've ever received.

every (active) U&L user must have refreshed the page and seen that question

5 votes in 2 minutes (boggled)

terdon

16:29

@StéphaneChazelas Interesting, but I deleted that (presumably, I don't really remember now) because it had no explanation, no details, no nothing. So it didn't really read like a useful answer. Now, if you want to provide one with that option and an explanation, I can promise at least one upvote!

Faheem Mitha

16:42

Hi folks. Was having an argument with the LaTeX folks about documentation.

Basically everyone ganged up on me, but I still think I had a point.

I thought of calling them elitist, but thought that would probably not help matters.

Prabhjot Singh

What is 550 failed to change directory.

Faheem Mitha

But I suppose mentioning this without more context is a bit pointless.

Bottom line the xparse manual describes how to write macros in a more "modern" way.

Prabhjot Singh

I was trying to install own cloud. Then this happened

Faheem Mitha

But the manual leaves out bunches of details, implicitly referring people to the more "traditional" commands. I just thought that some basic usage examples would be good.

But apparently that would be too elementary, and a waste of time.

Kusalananda

@JeffSchaller The only thing missing in that answer is showing a comparison between the two time strings.

Prabhjot Singh

16:52

Echo {{a,b}, {c,d} returns a b c d

Jesse_b

@PrabhjotSingh what?

Prabhjot Singh

Echo {{a,b}, {c,d} returns {a, { b, c} d}

Jesse_b

should return error

Prabhjot Singh

@Jesse_b echo {{a,b}, {c,d} returns a b c d

Jesse_b

Are you sure you are writing that correctly?

$ echo {{a,b},{c,d}
{a,c {a,d {b,c {b,d

Prabhjot Singh

16:58

When accidentally I put space between command and {c then echo {{a,b}, {c,d} returns {a, {b, c} d}

Jesse_b

I really feel like you are either adding a { that doesn't exist in your command or forgetting a } that does

$ echo {{a,b}, {c,d}
{a, {b, c d
$ echo {{a,b}, {c,d}}
{a, {b, c} d}

Prabhjot Singh

No no I accidentally added space between command and {c

Jesse_b

(╯°□°）╯︵ ┻━┻

Prabhjot Singh

No @Jesse_b don't give space before {c

Jesse_b

This is not a valid anything either way:
`{{a,b}, {c,d}`
or
`{{a,b},{c,d}`

You need to remove the first {

Prabhjot Singh

17:03

Got it

QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000 instead of 0
Qt: Session management error: None of the authentication protocols specified are supported

Jeff Schaller

@Kusalananda I interpreted it differently from you and from DopeGhoti; I see it as asking to compare a variable with a string, not between variables. DG shows the variable comparison, though, just in case that’s what he OP meant.

Prabhjot Singh

17:21

@JeffSchaller what is 550 failed to change directory in Mozilla.

Stephen Kitt

@PrabhjotSingh it’s an FTP error code

it means the path that was requested doesn’t exist

sort of like a 404 in HTTP

Prabhjot Singh

What should be done now?

Jeff Schaller

17:40

@PrabhjotSingh sounds like an error code. or 9 year old bug. hard to tell.

bugzilla.mozilla.org/show_bug.cgi?id=481808

Prabhjot Singh

17:51

@StephenKitt when i open owncloud in terminal. this shows

QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000 instead of 0
Qt: Session management error: None of the authentication protocols specified are supported
gui.application: Already running, exiting...

Jesse_b

19:35

Thanks for the edit @Kusalananda.

Kusalananda

19:56

@Jesse_b No problems.

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