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At my job we have a lot of objects that we track versions of. We are tentatively looking at creating a rather large number of sequence objects in order to keep track of these version. My concern is that sql...

Named pipes, file descriptors and EOF

Fixee 06/19/2018 at 19:46. 3 answers, 377 views file-descriptors fifo
Two windows, same user, with bash prompts. In window-1 type: $ mkfifo f; exec <f So bash is now attempting to read from file descriptor 0, which is mapped to named pipe f. In window-2 type: $ echo ls >...

More specifically, consider the Gray Ooze's ability to... Corrode Metal. Any nonmagical weapon made of metal that hits the ooze corrodes. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If my Forge cleric...

If I connect to a server like so: JP_PORT=$(shuf -i 8895-9100 -n 1) TB_PORT=$(shuf -i 6010-6200 -n 1) ssh -Y -L ${JP_PORT}:127.0.0.1:${JP_PORT} -L ${TB_PORT}:127.0.0.1:${TB_PORT} <host> Once connection is established, is there any terminal command that will return the list of...

The USS Enterprise is so famous that its registry number gets reused several times for successor ships (NCC-1701-A, B, C, D, E, etc.). Does this ever happen with any other Starfleet ships? Sisko's original USS Defiant (NX-74205) is replaced by...

The meaning of “half woman, half girl”

Peace 06/19/2018 at 15:18. 3 answers, 4.609 views word-meaning
In Educated by Tara Westover, there's this sentence: It was the same mirror I'd gazed into as a child, then as a girl, then as a youth, half woman, half girl. What does "half woman" mean? A girl that has...

I am making a map for a modern day game my DM is running, and I have an architectural image of a floor plan with listed square footage. For a D20 Modern's 5ft grid, how would I figure out how...

The progenitor of libraries

Joe-You-Know 06/19/2018 at 15:05. 3 answers, 698 views riddle rhyme knowledge
Perhaps you know me, I come in many forms, Regarding cultures, I am their only norm. As common as the days of the year, I exist, Yearning for the truth? Come to me, I insist. Evoked in times of...

I sat an Algebra test yesterday, which consisted of 30 questions and a total time of 45 minutes (an average of 1 min 30 secs per question). One question of the test was this: Given the matrix: $$A=\begin{bmatrix} -2 &...

I've created a Eladrin Druid (using Mordenkainen's Tome of Foes) for a new campaign. However, we've hit one little snag. Eladrin have the Fey Step racial trait built into their kit. Druids have their Wild Shape ability, part of which...

Plot Fibonacci Sequence (with tikzpicture)

DeeCeeDelux 06/19/2018 at 14:38. 3 answers, 251 views tikz-pgf
How do I plot the Fibonacci sequence (using tikzpicture preferably)? \documentclass{article} \usepackage{pgfplots} \begin{document} \begin{tikzpicture} \begin{axis}[xmin=0, xmax=30, ymin=2, ymax=3] \addplot[samples at={1,2,...,30}, only marks] expression {<Add Fibonacci sequence here>}; \end{axis} \end{tikzpicture} \end{document} Edit Since it seems more complicated than I thought, I...

Is there a construction or concept that can be dual to itself? If so, I would like to see some examples, preferably in category theory, in other fields, they are also welcomed.

We know that not all people have the same screen resolution in their computer monitor. Some people prefer widescreen display in 15'', when other uses 17'' and more for their computer experience. I am designing a web page that in...

I'm a Tabla (North Indian percussion instrument) player and I know just the basics of western music because I'm learning it bit by bit. I borrowed a Piano to learn music theory and it's going pretty good. My friend plays...

The below link is a practical demonstration on a popular database of handwritten digits. - synthetically created inputs that pretend to relate to one class but actually are from another one. The Limitations of Deep Learning in Adversarial Settings In...

Yesterday I took photos of an event at school. The lighting was poor so I increased the iso to 3200, shutter speed was between 80 and 250 and the aperture between 2.8 and 4.0. Canon EOS500 about 10% of the...

I would like to learn to play cello, but I have a mini-disability that prevents me from turning my right hand down (palm-down, or pronation) or up (palm-up, or suspination). How much is this going to get in the way...

I recently came across this question, Why are IC pinouts often so illogical?, which asks: Another example - the Z80's data bus: I mean, that one just makes no sense to me whatsoever. Not only are then in some seemingly...

Imagine a party of four - three honest characters standing face to face against three evil bandits, one sly, backstabbing type some 30 ft behind the bandits' backs; the bandits may know he's there, but they don't know he's a...

I will be visiting the beautiful town of Lisbon this weekend with a group of friends from Germany. Since the next German world cup game is pretty important we want to watch and support our team on Saturday (8 pm)...

Reference: The POSIX standard for the awk utility. One thing I really miss in awk is the ability to join an array with a delimiter, like with the join command in Perl, typically done for immediate output. Instead, I end...

I posted the following question in Physics SE and was advised to transfer it to Chemistry SE. I studied physics in college ten years ago and I recently started to learn biochemistry. I enjoy finding out that some familiar concepts...

Problem So, there is this (big) guy at the gym. He is 210cm and 105Kg (~6'11" and 230 lbs) which makes him look like a mountain, but he seems to not understand that not everyone is naturally as big as...

Bash wildcard not expanding

Gooberpatrol66 06/19/2018 at 06:35. 2 answers, 240 views bash mkdir
I'm trying to make a directory for each file in a directory. mkdir * returns File exists. So I try mkdir *.d and it makes a directory called "*.d". How do I force the wildcard to expand?

I'm a computer scientist at the point in my postdoc where I will have to decide soon whether to apply for faculty positions this fall or go to industry, in the US/Canada/UK/maybe Europe.1 But I've also recently come to the...

The new 42077 Technic Rally Car set looks really nice, and even has a built-in steering system which can be controlled by a gear on the top. There's also a fair bit of extra room inside, is there a way...

Say, I have on my server a page or folder which I want to be secret. example.com/fdsafdsafdsfdsfdsafdrewrew.html or example.com/fdsafdsafdsfdsfdsafdrewrewaa34532543432/admin/index.html If the secret part of the path is quite long, can I assume that it's safe to have such a secret...

$\sum_{n=1}^{\infty} \dfrac{\arctan n + \sqrt {|x|}}{n^2}$. Does the series converge uniformly on $R$. ? Let $f_k(x) = \dfrac{\arctan k + \sqrt {|x|}}{k^2}$. Then, I have to find $M_k$ such that $|f_k(x)| \le M_k$ for all $x \in R$. Concurrently, $\sum_{k=1}^{\infty}...

Reading What do the brackets around processes mean? I understand that the executable name is printed. Linux ps man page: Sometimes the process args will be unavailable; when this happens, ps will instead print the executable name in brackets. However...

I'm doing pythonAPI exercises, and this is my completed API address: http://api.juheapi.com/japi/toh?key=10245c2b75fa03d527204967ef7291cb&v=1.0&month=07&day=05 If you use the browser to open, the correct JSON file is displayed.but i cant't get correct result using the following codecode . page = urllib.urlopen(url) html =...

I have started using \autoref to perform some referencing between sections inside LaTeX. Consider the following MWE and its screenshot: \documentclass{article} \usepackage{hyperref} \begin{document} \section{Foo} \label{sec:foo} Some random text \section{Bar} \label{sec:bar} Some more random text \section{Baz} \label{sec:baz} More random text again...

Let $P$ be a $2016$ sided polygon with all its adjacent sides perpendicular to each other, i.e., all its internal angles are either $90$°or $270$°. If the lengths of its sides are odd integers, prove that its area is...

In the below code there are 3 inputs. First line of input is the number of testcases for which the program will run where (1<=testcases<=10) and i is an int. For each testcase Second and third input will be a...

What is the longest path in a square grid from one corner to the diagonally opposite corner? Edges in the grid may only be traversed once, but grid points can be used multiple times (in a square grid that means...

Appear means to come into visual consciousness, but what word do we use to indicate a sound has come into consciousness?

Shatter has always been my "go to" spell for damaging objects. Whether it was a wooden door or a fragile stone outcropping, I'd cast shatter to crack it or shake it loose. But today, I read something that confused me....

I'm trying to sign data using the WebCrypto API, but instead of creating a private/public key and exporting it to pkcs#1 or 8, I would really like to use a user's PKCS#12 to sign data. I've read the W3C spec,...

I have some lettuce plants and in the last weeks I have noticed an increasing number of ants staying in the leaves. They do not appear to eat the leaves nor do anything else. I wonder what is the reason...

Imagine you are minding your own business when you receive an email from someone who claims to have discovered the Answer to the Ultimate Question of Life, the Universe, and Everything. He provides some "details" about his theory, then says...

Obscene: translate 下流 or 輕佻?

Ludi 06/18/2018 at 22:45. 3 answers, 280 views difference
I want to describe people wearing clothing as totally indecent and obscene, for instance because the clothing doesn’t remotely cover the buttocks. I am not talking about ordinary mini skirts or hot pants, but about something like this. I definitely...

I am trying to put multiple hspace into one line of text to get something like this: So I want that the "where the customer can..." comes exactly under "In the Date Control". How can I solve this? My Latex...

Imagine this scenario: you're in an exam. Somebody asks for your help to answer a question. You help them (whisper the answer, slip them a note, whatever). You get caught. You get punished. That's fine. You're not allowed to help...

What's the name of my cat?

Sergei Petunin 06/18/2018 at 20:45. 3 answers, 1.804 views riddle wordplay knowledge
Do you like "Little Dorrit"? It’s a nice funny book. I would read, but I lost it, though is hard to overlook. Nerdy books don’t inspire you? Then let’s play play a game, Good old classic’s my favorite, "Space...

In NIST FIPS 186-4, "digital signature algorithm", the minimal length allowed is 1024 bit (page 22). On the contrary, in NIST SP800-56B, page 63, RSA-OAEP encryption, the minimal length is 2048. Why 1024 is secure enough for digital signature but not for encryption?

I have a player (who is a Bard/Rogue) who wants to fire both weapons but while I'm not seeing any rules against it I'm consulting for additional opinions. Is there anything to consider when doing this?

We get into unnecessary coding arguments at my work all-the-time. Today I asked if conditional AND (&&) or OR (||) had higher precedence. One of my coworkers insisted that they had the same precedence, I had doubts, so I looked...

I want the Netherlands to be flooded entirely, and I want the event to be of such a scale that it goes faster than hydroengineering can keep up with. This will mean that I need a sea level rise of...

Recently a close relative revealed to me that she has run up $40,000 in credit card debt over the last few years, which she can no longer manage because the interest payments are eating up all of her disposable income,...

We had some solar panels & an inverter installed recently. Everytime inverter is turned on (after maintenance or with the first light of the day) it has to synchronize its generation phase with the grid, and it is easy to...

I'm having trouble understanding the action economy of joining "melee combat" with "spellcasting". Jon is a Hexblade Warlock, that likes using his Pact of the Blade Greatsword, or if feeling down, a Pact of the Blade Rapier and a Shield....

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