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Scott Zhu
Scott Zhu
12:03 AM
Hello
anyone here?
 
enderland
enderland
waves
 
PreferenceBean
PreferenceBean
12:44 AM
no
 
user55340
@ScottZhu Its in the evening... I just got back from my commute and getting some food.
 
user55340
 
user55340
That shows the activity across the course of a day... you're on the tail end of people chatting.
 
user55340
(and I'm enjoying some nice burnt ends... in addition to the huge basket of BBQ)
 
user55340
And relevant question:
 
user55340
12:56 AM
0
Q: Array data structure with too many elements

Scott ZhuHow would you design a data structure that is an array, but with so many elements such that the array almost fills up the entire RAM?

algorithms data-structures interview
 
user55340
The very first question I'd ask back is "describe the data" - I'm interested in its density.
 
user55340
So you've got... say... 1M possible spots for the data.. But if only 10% of them are in use, I'd store it in another data structure instead.
 
user55340
It might be better to store it in a tree (index by 'location') - especially if the data is going to be walked in sorted order.
 
user55340
Or it might be better to store it in a hash if we're more interested about fast insert and delete.
 
enderland
enderland
depends on what you want to do with it, too
 
user55340
1:02 AM
Or maybe we're working on a spelling checker on an old machine... the 64k memory systems and you want to do a spelling checker with 75,000 words (at 8 bytes/word, this is 600 kb... 10x more memory than ram if you are to try that approach)
 
enderland
enderland
which seems obvious, but it's not, because it changes how you approach it
 
user55340
Incidentally, that's one of the stories in Programming Pearls.
 
user55340
It was done by implementing a bloom filter.
 
user55340
Bloom filter
A Bloom filter is a space-efficient probabilistic data structure, conceived by Burton Howard Bloom in 1970, that is used to test whether an element is a member of a set. False positive matches are possible, but false negatives are not, thus a Bloom filter has a 100% recall rate. In other words, a query returns either "possibly in set" or "definitely not in set". Elements can be added to the set, but not removed (though this can be addressed with a "counting" filter). The more elements that are added to the set, the larger the probability of false positives. Bloom proposed the technique for ...
 
user55340
 
user55340
1:05 AM
> Representing the hash table by a string of n = 2^27 bits would consume over 16 million bytes. The program therefore represents just one bits; in the above example it stores these hash values:
5 10 13 18 22
The word w is declared in the table of h(w) is present. The obvious presentation of those values uses 30,000 27 bit words, but Mallory's machine had only 32,000 16 bit words in its address space. He therefore sorted the list and used a variable length code to represent the *differences* between successive hash values. Assuming a fictitious starting value of zero, the above list is c…
 
user55340
> Mallory's spell represents the differences in an average of 13.6 bits each. That left a few hundred extra words to point at useful starting points in the compressed list and thereby speed up the sequential search. The result is a 64 kilobyte dictionary that has fast access time and rarely makes mistakes.
 
user55340
So, that's another way to store the data.
 
user55340
But once again, the point is that the solution depends on the problem its data, and the constraints that are presented.
 
user55340
I just gave tree, hash, bloom filter as different answers... and I haven't even touched on things like "store it on disk" set of solutions.
 
user55340
(and burnt ends rock)
 
user55340
1:13 AM
(went to Dickies... chatted with the guy doing the cut... explained a bit about burnt ends (while the people working are professionals, they are retail professionals - not pit masters) - and explained about the burnt end on the brisket and that its the toughest, hardest part of the cut... and that's what I'd love to have... so got that as extra and free)
 
user55340
Burnt ends
Burnt ends are flavorful pieces of meat cut from the point half of a smoked brisket. A traditional part of Kansas City barbecue, burnt ends are considered a delicacy in barbecue cooking. Either the entire brisket is cooked whole, then the point end removed and cooked further, or the point and flat are separated prior to cooking. Due to the higher fat content of the brisket point, it takes longer to fully cook to tender and render out fat and collagen. This longer cooking gave rise to the name "burnt ends". Sometimes when the flat is done, the point is returned to the smoker for further cooking...
 
user55340
btw, with all the Deadpool - he was once part of the Great Lakes Avengers.
 
user55340
Great Lakes Avengers
The Great Lakes Avengers (also known as The Lightning Rods, The Great Lakes X-Men, The Great Lakes Champions, and The Great Lakes Initiative) is a fictional superhero team that appears in comic books published by Marvel Comics. The characters were first introduced in West Coast Avengers vol. 2, #46 (July 1989), and were created by John Byrne. == Publication historyEdit == The team first appeared in The West Coast Avengers vol. 2, #46, and then made appearances in issues #48–49 and #64, and a cameo appearance in Avengers West Coast Annual #6. The GLA also make an appearance in issue #309 of Avengers...
 
user55340
Go Midwest and Canada!
 
user55340
> Following the events of Avengers: Civil War, the team operated as the Great Lakes Initiative in the state of Wisconsin.
 
user55340
1:39 AM
 
user55340
> A previous version of this article said it was "not clear why WhatsApp settled on the oddly specific number." A number of readers have since noted that 256 is one of the most important numbers in computing, since it refers to the number of variations that can be represented by eight switches that have two positions - eight bits, or a byte. This has now been changed. Thanks for the tweets.
 
user55340
 
user15026
@MichaelT Oddly specific, hmmm?
 
Ixrec
Ixrec
people need to learn their powers of two
 
user55340
I've been to parties where the default rounding of units was powers of 2.
 
user55340
1:41 AM
Much easier to deal with when you're drinking with imperial units.
 
user55340
8 oz = quart. 2 quart = 1 pint. 8 pint = 1 gallon.
 
user55340
See... powers of 2.
 
user55340
You metric people are messing it all up.
 
user55340
3:05 AM
 
user55340
Kindle edition $1.99?! Sure...
 
Ryan Shine
Ryan Shine
3:42 AM
hi all xcode and ios developer
may i know what is this view??
 
Aaron Hall
Aaron Hall
4:11 AM
Hey hey hey
 
 
2 hours later…
Ryan Shine
Ryan Shine
6:02 AM
may i know what u guys using for the ios or android backend database services?
parse is close
parse.com is not allow to sign up anymore
 
 
7 hours later…
PreferenceBean
PreferenceBean
12:45 PM
translating a bash script into batch. shoot me now.
 
user55340
@PreferenceBean !
 
PreferenceBean
PreferenceBean
wait why don't I just translate it into Python and use it on both OSes
duh
 
PreferenceBean
PreferenceBean
1:36 PM
 
Duga
Duga
2:13 PM
Welcome to Stack Overflow! Questions that ask "where do I start" are typically too broad and are not a good fit for this site. People have their own method for approaching the problem and because of this there cannot be a correct answer. Give a good read over Where to Start, then address your post. — Ferrybig 38 secs ago
 
Robert Harvey
Robert Harvey
2:32 PM
0
A: Keep the love of puns [burninating] in our hearts

Robert HarveyFor those of you who are so concerned about being "oh, so serious" here, do note that the word "burninate" originates from a Homestar Runner vintage video game spoof featuring a dragon called Trogdor. I can't possibly be the only one that appreciates the irony here.

 
user55340
@RobertHarvey MSO needs a popcorn machine.
 
Robert Harvey
Robert Harvey
Totally.
I was the one who edited the title. Imagine my surprise when I came in this morning and discovered I had precipitated a fully-baked meta post.
 
MetaFight
MetaFight
@RobertHarvey precipitiated
 
Robert Harvey
Robert Harvey
Could the crapload of flags Shog refers to be rejected with that picture as a reason? It would be even funnier that way. — Frédéric Hamidi 1 min ago
Heh.
 
user41796
2:50 PM
@MichaelT - I find it pretty funny that your local BBQ shops will give away the burnt ends for free. Shops down this way charge a premium for them.
 
enderland
enderland
@GlenH7 burnt ends are the best bbq too
 
user41796
I'm not as big of a fan of them, tbh
 
enderland
enderland
I mean, ribs are better. but compared to all the other smoked/sliced meat?
 
user41796
My preference is a mix of brisket and sausage
 
Robert Harvey
Robert Harvey
Mmm.... Brisket.
 
user55340
2:52 PM
@GlenH7 I'm a regular there. But yea.
 
user55340
You do need to take into account the upper Midwest preference for "wet" rather than dry BBQ.
 
user41796
There are too many in town for me to chose from to be a regular at any of then. Good problem to have.
 
user55340
It's also more part of the Kansas tradition rather than Texas tradition.
 
user55340
Some day I want to do a BBQ tour of the Carolinas.
 
user41796
@MichaelT smoked brisket came about simply because it was considered an off-cut and therefore was available on the super cheap
 
user55340
2:55 PM
 
user41796
With the stockyards in KC and local processing, they had too much supply. Not anymore though.
 
user41796
I wouldn't mind a BBQ tour of the Carolinas either. Coordinating logistics at this point may be a challenge
 
enderland
enderland
people here like much longer methods than I do...
 
Robert Harvey
Robert Harvey
6
A: Keep the love of puns [burninating] in our hearts

Shog9Just a general observation: jokes aren't usually funny when you try too hard. Unless the joke is that you're trying too hard to make something funny. Right now I'm getting a lot more amusement out of this discussion than I am from the increasingly-strained attempts at humor in titles. Maybe d...

 
Ampt
Ampt
3:18 PM
@MichaelT wet BBQ best BBQ
 
user55340
@GlenH7 see? And no. I tend to the dry side of BBQ preference.
 
Ampt
Ampt
release to prod got pushed a day due to outside influences, I.E. not my fault
kicks feet up
looks like I got a 24 hour extension, boys.
 
enderland
enderland
@Ampt Internet Explorer is horrible
 
Ampt
Ampt
 
Ilya_Gazman
Ilya_Gazman
Can some one help me with simple questions with arrays?
0
Q: Smallest sum of subarray with sum greater than a given value

Ilya_GazmanInput: An array of numbers and a value X Output: Sub array with sum of all its numbers equal to Y > X, such that there is no other sub array with sum of its numbers bigger than X but smaller than Y. Is there a polynomial solution to this question? If so, can you present it?

arrays algorithm performance numbers
 
Ixrec
Ixrec
3:28 PM
I have a feeling that's reducible to the subset sum problem
 
user55340
@Ampt I'm wondering when systems team will upgrade my desktop beyond IE 10
 
enderland
enderland
@Ilya_Gazman what are your thoughts on the problem?
 
user55340
1
A: How much of a codebase can be considered intellectual property?

Jerry CoffinYes and no. [note, the following is all written about US law. In other jurisdictions laws are, of course, different (though usually not drastically so.)] In the US there are (at least) three different bodies of law that might apply to code: copyright, patents, trade secrets. Copyright covers or...

 
user55340
> One case that's long been viewed as a landmark in this area is Gates Rubber v. Bando Chemicals. The Court of Appeals for the tenth Circuit decision includes a section titled: "The Test for Determining Whether the Copyright of a Computer Program Has Been Infringed."
 
Ilya_Gazman
Ilya_Gazman
@enderland I am not sure that polynomial solution is possible, but I don't know how to prove it.
 
user55340
3:30 PM
And that is why you ask a lawyer.
 
Ixrec
Ixrec
@Ilya_Gazman it feels like an NP-complete problem to me, so I'd look for polynomial time reductions to other NP-complete problems like subset sum or knapsack
 
Robert Harvey
Robert Harvey
I feel like you need a lawyer just to understand that answer.
 
Ilya_Gazman
Ilya_Gazman
@Ixrec yep, NP-Complete is my feeling right now. This is what I am trying to do. I am not good with reductions.
 
Ampt
Ampt
3:51 PM
@MichaelT that looks like a real case to me?
cited >800 times too. That's pretty significant.
 
Ixrec
Ixrec
for once, the migration system works flawlessly
 
amon
amon
surprising, considering the confused question
 
Ampt
Ampt
pray for me
My Dev lead is on vacation and my manager asked for prod access so I made him an account
if he breaks anything there's a 95% chance my dev lead will murder me
 
Aaron Hall
Aaron Hall
Pair programming time?
Pair programming
Pair programming (sometimes referred to as peer programming) is an agile software development technique in which two programmers work as a pair together on one workstation. One, the driver, writes code while the other, the observer, pointer or navigator, reviews each line of code as it is typed in. The two programmers switch roles frequently. While reviewing, the observer also considers the "strategic" direction of the work, coming up with ideas for improvements and likely future problems to address. This frees the driver to focus all of his or her attention on the "tactical" aspects of completing...
 
Ampt
Ampt
4:08 PM
Don't worry, I told him "Don't fuck anything up" to his face
that ought to get the message across that I ain't playin
 
user41796
@Ampt You're forgetting that excrement rolls downhill.
 
Ampt
Ampt
this hill is far too short.
 
Robert Harvey
Robert Harvey
I have this bit of linq 
        var address = addressLines.Where(x => !string.IsNullOrEmpty(x))
            .SkipWhile(line => !line.Contains("Principal Place of Business") && !line.Contains("Corp Mailing Address"))
            .Skip(1).Take(2).Aggregate((x, y) => x + "\n" + y);
Which throws 'Sequence contains no elements' if no line contains "Principal Place of Business" or "Corp Mailing Address"
How do I reformulate it so that it just returns null or an empty string instead of throwing?
 
user55340
@Ampt bigger hills pick up more speed before it splatters at the bottom.
 
user41796
@RobertHarvey FirstOrDefault()?
 
Robert Harvey
Robert Harvey
4:21 PM
I think it's the Skip that's throwing.
 
PreferenceBean
PreferenceBean
busy today
 
Ixrec
Ixrec
It looks like you're trying to write a monad. Would you like some help with that?
3
 
Robert Harvey
Robert Harvey
Pssh.
 
PreferenceBean
PreferenceBean
@RobertHarvey Wouldn't be so bad if the original pun had been any good. Or if new mod Machara knew how to spell "burninate"...
 
Robert Harvey
Robert Harvey
I'll have to break it into two separate queries and check the first for elements.
@PreferenceBean Eh, I think the problem was that the question was "featured." My bad.
 
PreferenceBean
PreferenceBean
4:24 PM
@RobertHarvey not surprised to hear that there's now a beef about burninate puns. bad SE. bad!
 
Ixrec
Ixrec
in all seriousness unless LINQ has an equivalent to the Maybe monad it does seem like separate queries is the only option
 
PreferenceBean
PreferenceBean
@Ixrec maybe
where did you see that? got a linq?
(groan)
 
Ixrec
Ixrec
@PreferenceBean don't make me bring up how chat mentions are a hylomorphism
 
user41796
Ponders freezing the room for a bit...
 
Robert Harvey
Robert Harvey
 
PreferenceBean
PreferenceBean
4:44 PM
@Ixrec what
@GlenH7 what???
 
Ixrec
Ixrec
he doesn't like morphisms
 
user41796
sed s/morphisms/bad punnery/
 
Ampt
Ampt
alright that's it, freeze it.
 
whatsisname
whatsisname
HOLD THE PRESSES
 
Ampt
Ampt
we should call that holding the enters now
 
PreferenceBean
PreferenceBean
4:55 PM
no we shouldn't
 
Ampt
Ampt
pausing the clicks?
shutting down the replication service between author, publish, and the webservers?
 
user55340
The missing number is a neat code golf possible question
 
Ampt
Ampt
it's in the int cache if I know anything about you and numbers
 
DeliriousSyntax
DeliriousSyntax
While science fiction, Larry Niven's story "Neutron Star" is likely a good read. — MichaelT 2 hours ago
 
enderland
enderland
ugh Go.
 
Ampt
Ampt
5:04 PM
no you go
 
DeliriousSyntax
DeliriousSyntax
Fine I'll go
 
user55340
Neutron Star (short story)
"Neutron Star" is an English language science fiction short story written by Larry Niven. It was originally published in the August 1966 issue (Issue 107, Vol 16, No 10) of Worlds of If. It was later reprinted in Neutron Star (New York: Ballantine, 1968, pp. 9-28, ISBN 0-345-29665-6) and Crashlander (New York: Ballantine, 1994, pp. 8-28, ISBN 0-345-38168-8). The story is set in Niven's fictional Known Space universe. It is notable for including a neutron star before their (then hypothetical) existence was widely known. "Neutron Star" is the first to feature Beowulf Shaeffer, the ne'er-do-well ex...
 
user55340
@enderland gopher?
 
DeliriousSyntax
DeliriousSyntax
 
enderland
enderland
@MichaelT golang
 
user55340
5:07 PM
@DeliriousSyntax nope. That is a science paper. I linked to a science fiction story.
 
user41796
@MichaelT to-may-toe ta-mah-toe
 
DeliriousSyntax
DeliriousSyntax
I'm trying to find a free pdf of it
 
user55340
 
DeliriousSyntax
DeliriousSyntax
well gtg class is ending
and thanks book sounds interesting
 
user55340
Meh. Amazon. And yea, kindle link. Just buy it. It's good.
 
user55340
5:11 PM
Neutron Star (short story collection)
Neutron Star is a collection of science fiction short stories by Larry Niven, published in April 1968. The individual stories had been published in the science fiction magazine If in 1966–1967, under Frederik Pohl as editor. == Contents == The book contains the following eight stories. Neutron star A Relic of the Empire At the Core The Soft Weapon Flatlander The Ethics of Madness The Handicapped Grendel All stories are situated in Niven's Known Space universe. == References == The Incomplete Known Space Concordance...
 
psr
psr
@RobertHarvey You could write your own SkipIfPresent extension method.
 
user55340
@psr would it be a monad?
 
Jimmy Hoffa
Jimmy Hoffa
5:28 PM
@RobertHarvey what you want is addressLines.Where(x => !string.IsNullOrEmpty(x)).Select(line => new[]{line}).SkipWhile(line => !line.First().Contains("Principal Place of Business") && !line.First().Contains("Corp Mailing Address")).Skip(1).Take(2).SelectMany(l=>l).Aggregate(null, (x, y) => x == null ? "" : x + "\n" + y);
The list monad models uncertainty, you just need to lift your elements into it
no, that won't actually work will it.. Meh. Do it in multiple steps.
 
PreferenceBean
PreferenceBean
@GlenH7 I find the US pronunciation of "tomato" hilarious. You guys took all the English words and admittedly did a fairly good job of simplifying them so that they look how they sound. Then, right at the end, you went "but let's make 'tomato' completely different". Trolls!
 
gnat
gnat
 
PreferenceBean
PreferenceBean
@gnat That is not spam.
@gnat recommended reading: https://en.wikipedia.org/wiki/Spamming
 
Ampt
Ampt
the definition of Spam on SO is different than typical spam
don't worry, @gnat's looking up the link so he can school you.
 
PreferenceBean
PreferenceBean
I know; can't wait :D
If I could be bothered I would have linked him to it myself, mind you
I sorely doubt you'll get a spam flag validated on that
Downvote, VTC and move on..
 
Ampt
Ampt
5:41 PM
when did you change your name?
and gravatar
 
PreferenceBean
PreferenceBean
week or two ago
Feb 4 at 23:03, by Lightness Races in Orbit
I want to change my nick to PreferenceBean
Feb 4 at 23:02, by MichaelT
Apr 3 '13 at 15:46, by MichaelT 
boolean productLookupShowPrices = new Boolean(((PreferenceBean) pricingPrefs.get(PreferenceBean.PRODUCT_LOOKUP_SHOW_PRICES)).getValue()).booleanValue();
that's literally the only reason
my life is full
 
user41796
@PreferenceBean I marked it as spam, tbh
 
user41796
and VTC'd. And VTD'd
 
PreferenceBean
PreferenceBean
@GlenH7 shhhhhhhhhhhh
 
Jimmy Hoffa
Jimmy Hoffa
@PreferenceBean ? how is it supposed to be pronounced? There's 2 pronunciations in America.. Depending on who you're speaking with.
 
enderland
enderland
5:45 PM
@Ampt vtc: school is educational advice
 
Ampt
Ampt
@enderland just waiting for @GlenH7 to VTD and then it's gone
 
enderland
enderland
pew pew. tag teamed. woot!
 
PreferenceBean
PreferenceBean
@JimmyHoffa tomahto obvs
 
Robert Harvey
Robert Harvey
@PreferenceBean Let's call the whole thing off.
 
PreferenceBean
PreferenceBean
@RobertHarvey well that escalated quickly
decades of cultivating the "special relationship" ... scuppered by fruit
hometiem bbl
 
Jimmy Hoffa
Jimmy Hoffa
5:50 PM
@PreferenceBean huh.. well, you're wrong, but that's ok. We can't expect you to be right every time, we did have to bail you out in the 40's after all... (The American Way: Always remind everyone else in the world what we did once upon a time, so we never have to do shit again. It's like a reverse godwin)
 
gnat
gnat
76
A: Are job offers spam?

Robert HarveyYes, they are spam. The purpose of Stack Overflow is to get answers to programming questions, not to solicit developers for work. If employers want to do that, they can use Careers for that purpose.

 
PreferenceBean
PreferenceBean
(that took you a while)
 
Jimmy Hoffa
Jimmy Hoffa
@PreferenceBean also, Tomatos are vegetables, per our judiciary, so you're twice wrong now.
 
Ampt
Ampt
finally updated the RMA - cost is too high to warrant making one block... even though I requested two. They offered a refund or store credit on their site. I asked him to get back to me whether the answer would change for two blocks, otherwise it's refund season.
 
PreferenceBean
PreferenceBean
@JimmyHoffa they have seeds - wrong again, colonists!
we should have sent some gardening experts as well as the farmhands
oh well live and learn
 
Jimmy Hoffa
Jimmy Hoffa
5:51 PM
@PreferenceBean seeds nothing, a judge said vegetable, so vegetable it is. Botanists are just plant people, Judges are judge people; their judgement is final. It has been decreed.
 
PreferenceBean
PreferenceBean
@JimmyHoffa says more about the judge than it does about the tomato
 
Jimmy Hoffa
Jimmy Hoffa
@PreferenceBean tomato's can't talk
 
PreferenceBean
PreferenceBean
@JimmyHoffa woah hang on a minute
let's not get personal
ok really bbl now
 
user41796
@Ampt Take your the money and run?
 
user41796
Although I can't imagine that there's a lot of other alternatives for you to use.
 
Jimmy Hoffa
Jimmy Hoffa
5:55 PM
@Ampt wth did you do to your waterblocks to feck' them up like that?
Were you running isopropyl through them or something?
 
Ampt
Ampt
@JimmyHoffa distilled water is apparently really corrosive to nickel
@GlenH7 no. there's not
which is why I'm pushing for new blocks
 
Jimmy Hoffa
Jimmy Hoffa
@Ampt ?? how does that make any sense? Distilled water is just...water.
 
Ampt
Ampt
@JimmyHoffa Ask @GlenH7 he's the one who laughed at me
 
user41796
@JimmyHoffa water is an amazing solvent
 
user41796
@Ampt chuckled...
 
Jimmy Hoffa
Jimmy Hoffa
5:56 PM
@GlenH7 true enough. I would have however suspected the blocks were made to handle .. water.
 
Ampt
Ampt
apparently I need a buffer solution
 
user41796
And it wasn't at you but more towards the situation...
 
Jimmy Hoffa
Jimmy Hoffa
What else was he supposed to put in them? Smuckers grape jelly?
@Ampt is that what the instructions say? Why the hell did they make their water blocks out of something that is water soluble?
 
Ampt
Ampt
I'm imagining the reaction on the forums if I posted that... "My block was dyed purple by the grape jelly I was using. is there any way to clean them?"
 
user41796
@JimmyHoffa buffered solution
 
Ampt
Ampt
5:58 PM
they call it their proprietary liquid solution, but yeah, that's my guess is that it's just a buffered solution
 
Jimmy Hoffa
Jimmy Hoffa
@Ampt oh, so you ignored the instructions. Dumbass.
RMA rejected.
 
user41796
Water by itself is really good at breaking apart ions. A buffered solution "pre-loads" the water so it's not so good at that anymore
 
Ampt
Ampt
@JimmyHoffa why do you think I didnt mention that in my RMA at all
also, it wasn't explicitlyin the instructions
 
Jimmy Hoffa
Jimmy Hoffa
@GlenH7 I understand all that, I just presumed it was meant to work with water which made the idea that his distilled water messed them up seem nonsensical. Apparently they weren't however intended to work with water.
 
Ampt
Ampt
it was more suggested via forum posts and sales ads
 
Jimmy Hoffa
Jimmy Hoffa
5:59 PM
@Ampt that's because explicitlyin isn't a word.
 
Ampt
Ampt
so yeah... I'm hoping the answer changes when they communicate that we're either refunding or replacing 2 blocks as opposed to one
but... I'm not holding my breath
the thing is that I wouldn't have bought two cards if I couldn't water cool them :(
 
Jimmy Hoffa
Jimmy Hoffa
@Ampt you should send them the cards too and just say "Look, toss the lot of it and send me a Titan X in replacement and we'll call it even"
 
user41796
@Ampt Do you have to return the blocks to them?
 
user41796
and / or what led you to opening the blocks up to see the corrosion?
 
Ampt
Ampt
@GlenH7 I opened them to clean them
there was some buildup in the reservoir that I wanted to investigate - it's likely the nickel plating from the blocks.
 
user41796
6:05 PM
If you don't have to return the blocks, you could always send them out to be replated
 
Ampt
Ampt
gah that sounds like a nightmare... they have threaded parts that are plated as well
and the tolerances have to be tight to fit with the gaskets
 
user41796
There are plating shops in your village. You could take the blocks in and ask them. They should be able to tell you yes / no / laugh in your face fairly quickly.
 
Ampt
Ampt
hmmmm
 
user41796
And they may be able to mask them off so the dimensionally sensitive areas don't get re-plated.
 
Jimmy Hoffa
Jimmy Hoffa
how much $ are those blocks protecting though?
 
user41796
6:09 PM
And no, Jimmy, dimensionally isn't a word either.
 
Jimmy Hoffa
Jimmy Hoffa
worth the risk? :/
 
user41796
@JimmyHoffa no blocks, no super silent video cards. No bueno.
 
Ampt
Ampt
currently the blocks are watertight
 
Jimmy Hoffa
Jimmy Hoffa
@GlenH7 dementianally however is a word near and dear to me. Too near.
 
Ampt
Ampt
there is no risk of leakage in the future with the current areas of deterioration
it's the pump I'm worried about - I don't want larger chunks to break off and clog up the pump and kill it
 
Jimmy Hoffa
Jimmy Hoffa
6:10 PM
@GlenH7 yeah but I mean literal $ figure, I wouldn't risk $750 in hardware with the fear that the replating didn't maintain the seal, if it's $350... dunno
 
user41796
@JimmyHoffa Must be from the same dictionary
 
Ampt
Ampt
I think we talked about this before and agreed that switching to a buffered solution now would help that
aka prevent future corrosion
 
user41796
@Ampt yes
 
Ampt
Ampt
@JimmyHoffa if the blocks leak, you're talking a few thousand dollars that could go poof
 
user41796
use whatever their proprietary solution is
 
Jimmy Hoffa
Jimmy Hoffa
6:11 PM
I know! Put colloidal silver in there!
SILVER PLATED BLOCKS FTW!
 
Ampt
Ampt
yeah I already have silver in there
it did not plate the blocks
 
Jimmy Hoffa
Jimmy Hoffa
(really? I was kidding, that causes no issues?
 
Ampt
Ampt
nope - it's there to kill bacteria
totally safe
 
user41796
@JimmyHoffa Likely slowed down the nickel corrosion
 
Jimmy Hoffa
Jimmy Hoffa
makes sense
I love when random nonsense actually turns out to be a reasonable idea. Who knew.
 
Ampt
Ampt
6:13 PM
so yeah. here's to hoping that if they can't replace them, they refund them and don't ask for the old ones back
also I'm gonna ask for a fresh gasket kit
x2
 
Jimmy Hoffa
Jimmy Hoffa
I vote you take the refund and by some modern chips that have passive cooling, because water is bad for computers.
 
user41796
@ampt - Are there mineral spirits based cooling blocks? And / or can you mod the existing blocks to use spirits instead?
 
user41796
corrosion issues might still be an issue as I don't think you can buffer mineral spirits
 
Jimmy Hoffa
Jimmy Hoffa
@GlenH7 don't spirits trouble plastics?
 
user41796
@JimmyHoffa no, no. spirits trouble teetotalers
 
Ampt
Ampt
6:20 PM
@GlenH7 the current blocks and radiators have very fine tubing - I think the pressure on the pump would be too great.
 
Jimmy Hoffa
Jimmy Hoffa
@Ampt greatness is a virtue! I suggest you switch immediately!
 
Ampt
Ampt
the pump can't even handle all this greatness
 
user41796
guess this means you'll have to buy new video cards and blocks....
 
Jimmy Hoffa
Jimmy Hoffa
^^ SLI that instead.
 
Ampt
Ampt
@GlenH7 no. BAD. BAD GLEN!
my wallet wants to punch you in the face right now.
 
user41796
6:30 PM
@Ampt We need to explain to your wallet that it exists merely to allow you to buy more toys.
 
Ampt
Ampt
ha, explain that to my GF
 
user41796
Sounds like a personal problem... :-P
 
Jimmy Hoffa
Jimmy Hoffa
I smell a project brewing. How to passively cool 1 780 Ti... (and ebay another away)..
You want quiet... engineer it. I wonder if there are any aural insulators that aren't thermally insulative..
Water obviously insulates sound while conducting heat...
 
Ampt
Ampt
remember, you're attempting to passively cool 250W
(and your goal is to keep temps under 65C
 
Jimmy Hoffa
Jimmy Hoffa
What if a machine's case had water filled walls. Weather stripped connections between said case pieces could reduce interior kinetic conduction to the exterior portion, and water between the interior and exterior pieces of the case would make any interior vibrations not conducted to the exterior wall of the case piece in areas where the interior and exterior wall aren't connected..
You could attempt to actively cool it while containing the noise. Though insulating the vibrations to the interior of the case wouldn't necessarily be good for the hardware either
 
Ampt
Ampt
6:43 PM
there are case fans that move outside airflow to the inside of the case
but you're talking about dissipating 250 Watts into open air with no fans
 
Jimmy Hoffa
Jimmy Hoffa
Call it all off. Just buy a bunch of really long cables, and put the computer in the garage, fill it with fans - huge fans! but run all the wires to the controlling componentry to the desk from there.
 
Ampt
Ampt
no garage
send better ideas pls
 
Jimmy Hoffa
Jimmy Hoffa
If a computer fan spins in the utility closet and there's no one there to hear it, does it make a sound?
 
psr
psr
@PreferenceBean To be fair, we also made tomatoes themselves completely different.
 
Ampt
Ampt
yes because it means that my computer is slowly being suffocated to death :(
 
enderland
enderland
6:45 PM
you monster
computers have feelings too!
 
Jimmy Hoffa
Jimmy Hoffa
@enderland hopefully they hurt a lot because that's what they've spent the past 20 years doing to me..
 
enderland
enderland
@JimmyHoffa suddenly everything makes sense
 
Duga
Duga
@Jesper From What topics can I ask about here? in the help center, software questions are allowed if they cover "[...] software tools commonly used by programmers". Sublime Text, like vim, emacs, Notepad++, etc., is a programming editor, and there are tens of thousands of questions about them on this site that are perfectly on-topic. — MattDMo 19 secs ago
 
whatsisname
whatsisname
7:11 PM
@JimmyHoffa: water doesn't actually insulate against sound
in fact water is a much better conductor of sound than air
it doesn't conduct high frequencies as well though
 
Jimmy Hoffa
Jimmy Hoffa
@whatsisname that's true and untrue.. it does something to sound, I'm not clear precisely on the mechanics of it, but I want to say while it is a great kinetic conductor (hydraulics for instance), but it warps the kinetic conduction or some such. Slows it perhaps, like a filter?
 
whatsisname
whatsisname
it does act somewhat as a low-pass filter
anyways if you want to quietly cool a 250W load doing it actively is what you'd want to do with a heat pump
 
Ampt
Ampt
aka liquid cooling?
yes
I use a pump to push water over the hot chip, then push it through a large radiator located elsewhere, which exchanges the heat with air.
 
Jimmy Hoffa
Jimmy Hoffa
@Ampt I'm still curious about the idea of sound insulating.. I wonder what further could be done to make a fan based heating solution quiet. What causes all the sound in a computer anyway? Air moving loose things right? What if nothing was loose... What if the sound could simply be blocked in.. How could you do that? Just an interesting thought experiment.
Is it the fans movement itself making the noise? Again, is there a way to contain that sound to the space around the fan so it's vibrations aren't conducted out?
Obviously there's various forms of fan bearings that can act to help this, but I wonder what could be done beyond that.
@GlenH7 engineering solution? How do you make a case that contains all vibrations like a sound-proof-room without insulating the heat in? While still allowing air-flow..
 
Ampt
Ampt
7:28 PM
@JimmyHoffa really, for me, the largest source of noise comes from me trying to put two graphics cards next to eachother
the back of one card blocks the airflow to the other, and I end up with one card being suffocated and having it's 60MM fans run at full speed
the smaller the fan, the faster it spins, the louder it is
 
Jimmy Hoffa
Jimmy Hoffa
I get all that, but what if you could let it spin as fast and loud as it wants and that sound was contained inside the case?
 
Ampt
Ampt
I have eight 120mm fans running at full speed and they are still quieter than the two 60mm fans on one gfx card
the other problem is heat - I don't want that one suffocated card to get too hot and damage itself
by suffocating the fan, the temps run far higher
 
Jimmy Hoffa
Jimmy Hoffa
The air going in and out of the fan vibrates, this air exits with a vibration which we hear, perhaps that's it? Could one control the air exit / entry such that it's not vibrating upon enter or exit?
(8 fans? Yeesh!)
I have...2.
 
Ampt
Ampt
two radiators - one supports 4 fans, the other supports two
the other two are just general airflow fans
I could double up the fans on the radiators.... but that would be overkill. I have yet to see temps over 35C
at least I hadn't before I switched back to Air cooling sobs
wait a minute... the place I bought my blocks from has 5 in stock...
gues I'll just turn around and spend the refund on two new blocks
 
user55340
2
Q: Find the missing number in an undelimited string

MichaelTThe challenge is to identify the missing number in a string of undelimited integers. You are given a string of digits (valid input will match the regular expression ^[1-9][0-9]+$). The string represents a sequence of integers. For example, 1234567891011. All numbers in the sequence are in the...

code-golf string number sequence
 
user55340
7:41 PM
-6
Q: Find missing number in sequence in string

NeoI have a string that contains numbers in sequence. There are no delimiters between numbers. I have to find missing number i sequence. For example: 176517661768 has missing no: 1767 8632456863245786324598632460: Missing number is 8932458 I have no idea how to even start. On top of that, I am mo...

algorithms strings numbers string-matching sequence
 
enderland
enderland
@MichaelT that looks like fun
 
user55340
Poor p.se questions occasionally make good code golf questions
 
Ampt
Ampt
Have we contributed to team success today @KitZ.Fox?
 
Kit Z. Fox
Kit Z. Fox
Yes, we have.
You guessed because I wasn't in here all day, didn't you?
 
Ampt
Ampt
huzzah!
pretty much yeah
it was that or you were crying at your desk. I just flipped a coin.
 
Kit Z. Fox
Kit Z. Fox
7:43 PM
I cried yesterday.
 
Ampt
Ampt
see, and yesterday I would have guessed crying. The coin never lies.
 
Kit Z. Fox
Kit Z. Fox
I went in with a cool head today and scheduled our first sprint review and retrospective.
 
Ampt
Ampt
My org partnered with gallup to come up with a strengths assessment test. I'm actually impressed.
 
Kit Z. Fox
Kit Z. Fox
The scrum master and I pitched a planning/review plan to the team and they came back with "we'd rather not be on the phone all day."
@Ampt With the test?
Or with the way the project functioned?
 
Ampt
Ampt
@KitZ.Fox Gallup is a pretty upstanding and generally well thought of organization in my mind
the fact that they collaborated on this project gives it more credibility, at least to me.
 
Kit Z. Fox
Kit Z. Fox
7:45 PM
Oh yes, I see what you are saying. That is quite a prestigious group.
 
user55340
 
Kit Z. Fox
Kit Z. Fox
I think it said I will be hit by a bicycle.
 
Jimmy Hoffa
Jimmy Hoffa
@KitZ.Fox it told me to propose to a bear..
 
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