/dev/chat

You could use anything in $IFS though. And you don't even have to -squeeze because $IFS will do that anyway, but tr is faster at it than the shell is.

terdon

@mikeserv Heh, that's a clever use of printf. Won't print the longest though, only the last one:

echo 0000000000000000000000000012341234askdlfm0000000000012 | printf "\r%s" $(tr -sc 0\\n-9 \ )

That returns 0000000000012

Also, the actual string being printed includes both numbers, they're just not shown cause of the \r so that might break scripts downstream.

mikeserv

There's something wrong with that...

The byte string includes the \\r's too - but he asked how to print them.

Anyway, read takes care of that if you want to save it.

terdon

@mikeserv True but they are being printed, just not shown.

mikeserv

They're being printed over.

terdon

The more important issue is that you're not printing the longest number, you're simply printing all of them and displaying the last one.

mikeserv

11:24 AM

With the right terminal setting they completely disappear.

I know theres something wrong with your output - that shouldn't happen. I have to test that.

terdon

@mikeserv You're not testing for the longest string

mikeserv

I don't have to.

You had a \tab in yours somehow.

terdon

@mikeserv Yes you do, that's what the Q is asking for,

@mikeserv:

echo 0000abc00 | printf "\r%s" $(tr -sc 0\\n-9 \ )

returns 00 not 0000

Well, it actually returns \r0000\r00 but that's the second problem.

mikeserv

That's what happens when you save it - I have to just the \\033 home escape instead.

It'll just take a second to remember whatt that is.

terdon

Save it? No, that's what's actually printed, run it through od -c to check.

Anyway, the most important issue is that you;re not doing what the question asks for. It's a shame cause that's a damn fine trick, just not an answer to the problem.

mikeserv

11:46 AM

You have some crazy character in there - was it a control m?

That's why it was broken. I can fix that too - just need one more tr.

terdon

@mikeserv No I don't. It's just that your solution does not look for the longest number it prints all of them, and the \r makes only the last one visible. That's not what the OP was asking for.

slm

12:10 PM

@terdon thanks, what number isn't the the largest and also longest? I cannot find an example that sort -n doesn't deal with.

terdon

@slm 0000000000001 and 2

slm

@terdon - there's one

terdon

Or 0.0000000000001 and 2

slm

when he said strings I took it to mean literal strings of numbers

no decimals

terdon

@slm Fair enough, but he also said:

> Note: I am looking for the longest continuous sequence of numbers, not for the numerically higher value

slm

12:13 PM

yeah I read that 50 times trying to make sure I was working right 8-)

hadn't thought of 00000's

terdon

Heh, great Q&A on backticks by the way, going for your 100?

slm

trying

my wait A is "waiting" at 84. Maybe this one. Starting to feel like ahab

@terdon - got any other strings?

seems like I might be able to do it without the for loop

terdon

1:35 PM

@slm awwww :)

@slm That should work perfectly, it also catches 00000100000000 and the like.

Ramesh

2:23 PM

@slm, Thanks :)

terdon

2:45 PM

@Ramesh Hey, yes, well done!

TAFKA 'goldilocks'

I threw a race into the close queue again because I think the older dupe should be closed instead. Here's the old one, get it closed first:

7

Q: How can you determine which process scheduler is being used?

I.e. is it the O(1) scheduler, the CFS scheduler, or an older one?

terdon

@TAFKA'goldilocks' Huh? Why? The old one looks better and already has answers.

TAFKA 'goldilocks'

@terdon No, the newer has a better answer because it actually explains the issue (there is not more than one scheduler), whereas the old one does not, although the old one could be read as presuming you understand this already.

terdon

3:13 PM

@TAFKA'goldilocks' Ah, I see, sorry, I had not really read it.

voted

Ramesh

@terdon, Thanks a lot :)

derobert

5:15 PM

17

Q: Is programming, in a game, on topic here?

Sometimes, within a game you find programmable entities. A great example are the Turtles of Computer Craft, a minecraft mod. If I had a question about programming Turtles, or anything else that's programmable, WITHIN a game, is that on topic or off topic?

discussion allowed-questions

Interesting, and related to our "is C on topic" question

derobert

8:48 PM

-1

Q: How to set up a cron entry that runs at 00 and 30 after the hour?

I have a cron entry that runs every 30 minutes - */30 * * * * /home/myuser/myscripts.sh How to set this up such that it runs exactly at 30 minute intervals but also exactly at (for example) 3:00 PM, 3:30 PM, 4:00 PM, 4:30 PM and so on. So I'm not only interested in the 30 minute interval ...

cron

... does */30 really mean something different than 0,30 ?

man 5 crontab isn't fully clear

/n syntax is non-standard but common extension, so I can't just check the spec

but it appears to work that way on my system

Braiam

@derobert debian?

derobert

Yeah, I tested on Debian

Braiam

> For example, ``0-23/2'' can be used in the hours field to spec‐
ify command execution every other hour

don't say anything about *

> so if you want to say every two hours'', just use */2''.

ok apparently it does

derobert

A field may be an asterisk (*), which always stands for ``first-last''.

so actually, it does say that */30 means at 00 and 30

Braiam

@slm want this? askubuntu.com/q/457934/169736

derobert

9:01 PM

on Debian at least. No idea about the weird versions of crond that may exists on, say, Ubuntu. Or Arch.

Braiam

@derobert apparently

let me check ubuntu patches, but I doubt they changed anythin

derobert

I doubt Ubuntu is different

slm

@Braiam Too little info to do anything with it. If he fills in more info I'll take it

derobert

@slm Probably OP failed to fix the network config. At least on Debian, you'd have to change the MAC address that corresponds to eth0 in the udev config

slm

@derobert - yeah

Braiam

9:05 PM

is so good being free of university!

now only 2 exams left (finals, but I can be exonerated of 1) and one presentation I have to listen

@slm if you write [unix.se] the thing is automagically converted to Unix & Linux in the comments ;)

slm

muhaaahhhh

thanks

Braiam

10:50 PM

makes @derobert cry

derobert

@Braiam oh dear...

terdon

@derobert Braiam really does have an evil streak... :)

That's pure geek baiting that is.

strugee

@terdon no it's not. this is real:

I first saw this problem on the Google Labs Aptitude Test. A professor and I filled a blackboard without getting anywhere. Have fun.

terdon

@strugee Yeah, exactly. I love that one, you should have seen the face of my Physicist housemate when I showed him :)

derobert

Hah

strugee

10:59 PM

<3 xkcd

derobert

It's OK. It's a 1-rep, brand-new AU user, who has probably already destroyed his system. Won't be back to answer followups.

Braiam

VTC'ing!

on the xkcd topic... apparently there's an spanish translation of the thing!

I didn't knew!

terdon

@Braiam, is there a meta post on meta.se explaining the new orange thingie? Is that all review items?

strugee

@Braiam really. that's awesome.

terdon

@Braiam Really? Where?

Braiam

11:06 PM

BEHOLD! THE XKCD IN SPANISH! es.xkcd.com

@terdon I presume since they removed the 10k flag queue, and now replaced it with the LQ review queue... I have to presume too many things but was expected... I think

terdon

@Braiam Yeah, that's what I thought but it's not mentioned in the close 10k Q.

Braiam

12

A: Notify users of possible reviews on toolbar

As of a few minutes ago, we are replacing the pending suggested edit count in the top bar with the number of pending reviews for diamond moderators and folks with the "moderation tools" privilege (i.e. 10k users on graduated sites and whatever that level's at on betas): We are excluding the Cl...