### 1 sed: How to add a key/value pair at the end of the section in INI file

chesschi 1 hours 2 minutes ago. 2 answers, 0 views regex bash sed ini
In order to add a key/value pair at the end of the section in INI file, I would like to: Find the match section name and check if next square bracket (i.e. ^[) is available. If so, find the last...

### 3 Adding columns from multiple files with numbered names

Piotr 1 hours 48 minutes ago. 1 answers, 0 views command-line text-processing
I have a lot of files named like this: DOS1, DOS2, DOS3, DOS4, ..., DOS128. Each file contains four columns (first column is the same) with numbers, like this: DOS1 is: 33 12 1 2 16 32 8 1 9...

### 1 Filter csv file based on extended column values

Sri today at 11:42. 1 answers, 0 views text-processing awk csv-simple
I have the following csv file: ID,PDBID,FirstResidue,SecondResidue,ThirdResidue,FourthResidue,Pattern RZ_AUTO_1,4tov,1404,1405,1518,1519,CG/AA Canonical ribose-zipper RZ_AUTO_2,4tov,1405,1406,1517,1518,GU/AA Naked ribose-zipper RZ_AUTO_3,4tov,1043,1044,1047,1048,CC/GA Naked ribose-zipper RZ_AUTO_4,4tov,1556,1557,1514,1515,CC/GA Naked ribose-zipper RZ_AUTO_5,4tow,130,131,99,100,AU/CA Canonical ribose-zipper RZ_AUTO_6,4tow,766,767,1524,1525,AA/CG Canonical ribose-zipper RZ_AUTO_7,4tow,131,132,98,99,UC/AC Canonical ribose-zipper I need to go through each row and print rows where the...

### 6 What would life be like on a planet with high atmospheric pressure?

princeprince today at 07:40. 0 answers, 0 views science-based biology planets
I'm effectively looking to change the 'Could' in this question to a 'what' or 'How'. Could higher land-based life exist on a planet with a pressure of about 1 MPa? I'm working on a story in which humans visit a...

### 2 R: Creating dummy variables for values of one variable conditional on another variable

user3614648 today at 06:42. 1 answers, 0 views r loops vectorization assign dummy-variable
ORIGINAL QUESTION I want to add a series of dummy variables in a data frame for each value of x in that data frame but containing an NA if another variable is NA. For example, suppose I have the below...

### 3 Either for error handling in java

yaarix today at 06:41. 1 answers, 0 views java error-handling either functional-java
My new workplace is heavily using functional java Either for its error handling (http://www.functionaljava.org/javadoc/4.5/functionaljava/fj/data/Either.html). exceptions are almost not used at all. This is very annoying imo for many reasons. To name one: Every api call (which returns an Either) inside...

### 6 100 blank cards, minimize the EV

Tinatim yesterday at 21:14. 2 answers, 213 views probability algebra-precalculus
I give you a hundred blank cards, and you can write a single positive integer on each card. I look at the cards when you are done, then I shuffle the deck. I guess the top card of the deck,...

### 3 force:source:push fails with opportunity with field history enabled

Renato Oliveira yesterday at 20:07. 1 answers, 18 views salesforcedx scratch-org source-push
Trying to push the source code to a scratch org I get the following error: The entity: Opportunity does not have history tracking enabled (998:13) But there is no option to specify on the scratch org definition file to enable...

### 6 Is using TL:DR Unprofessional?

bhilgert yesterday at 19:52. 7 answers, 900 views professionalism
Recently I was tasked with writing an email for a wide audience of both mid-managers and technical IT personnel. I needed to explain technically why an event occurred and provide key points to management so they could act upon the...

### 2 Are normal packets ever combined into jumbo packets?

Fred Phillips yesterday at 19:31. 1 answers, 0 views ethernet
Do routers ever combine multiple small frames into a jumbo frame then split them up again on the other end? I know that most of the time it wouldn't make sense to do because you would add latency by waiting...

### 1 Does newer MacBook Pro need anti virus

Nofel yesterday at 19:16. 2 answers, 116 views macos mac
I am purchasing MacBook Pro 2017 with Touch Bar and I was told by one customer representative of the shop that you need anti virus because old one use to come with build in anti virus but not the new...

### 14 What holds SpaceX’s rocket in place in this launch?

MarsJarsGuitars-n-Chars yesterday at 18:15. 2 answers, 559 views spacex launch falcon-9 tel
On a recent launch video, the gantry is at an angle and only loose tethers are attached as the rocket is prepared for launch. What is keeping it upright and in place at this point? The engines haven't started and...

### 10 Does the boiling mud stay on my character when I teleport?

My character fell into boiling mud and I used misty step to get out. When I teleport am I still covered in boiling mud, and will I continue to take damage?

### 3 How do I carry my variables from a Bash script into a Perl one?

J. Doe yesterday at 18:07. 3 answers, 193 views bash environment-variables language perl
I have variables in a bash script that I need to be carried over into a perl one. I have the variables $gal and$obsid declared in the bash script, and then I call the new program. $gal=UCLA121$obsid=1896 ./my_program...

### 4 Conformal field theory does not have… conformal symmetry?

This post is about 1+1d. It is often said that conformal field theory has an infinite-dimensional symmetry generated by the Virasoro algebra: $$[L_n,L_m] = (n-m) L_{n+m} + \frac{c}{12} n (n^2-1) \delta_{n+m,0}.$$ (Similarly for the anti-holomorphic branch with generators...

### 1 Symantec Backup Exec runing DBCC CheckDB and Backup on my SQL server

user9516827 yesterday at 17:28. 2 answers, 75 views sql-server backup dbcc-checkdb process
What is Symantec Backup Exec (TM)? I noticed that it is running in one the database server i am maintaining. I am a newbie in db administration and i am not sure what it is. It is running DBCC CheckDB...

### 1 Help!!! Can I shut off my keyboard w/o turning off my computer?

Ferral friend forever yesterday at 16:48. 2 answers, 355 views technology
My feral kitty (isn't feral anymore), Shorty, Loves to sit in front of my Gigantic old beast of a laptop for the heat and to keep an eye on my cursor. But when I'm not looking or want to hear...

### 9 Difference between return {} and return Object{}

elvis.dukaj yesterday at 15:21. 2 answers, 574 views c++ c++11 initialization
Is there any significant difference between this two functions? struct Object { Object(int i) : i{i} { } int i; }; Object f() { return {1}; } Object g() { return Object{1}; }

### 19 Assasination by means of shooting through wall

MedwedianPresident yesterday at 14:50. 10 answers, 3.172 views reality-check weapons assassination
In the story I am writing right now, a scene portrays the attempt to kill the main character in his own apartment. After having studied the floor plan, the assasin decides to shoot him from the neighboring flat - through...

### 2 Rows not showing in attribute table

tony-bof yesterday at 14:03. 1 answers, 52 views arcgis-desktop attribute-table arcgis-10.5
I have a problem with a shapefile I created exporting features from another shapefile. I have all my lines visible but their rows only appear in the attribute table window when they're selected, do you know why and how can...

### 11 How to load a PKCS#12 Digital Certificate with Javascript WebCrypto API

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,...

### 26 Java assignment operator execution

Sam yesterday at 13:40. 5 answers, 1.103 views java string equals assignment-operator
I understand that in Java assignment evaluates to the value of the right operand so statements like x == (y = x) evaluate to true. This code, however, outputs false. public static void main(String[]args){ String x = "hello"; String y...

### 9 How hard do you have to throw something off the ISS to make it deorbit?

Bananenaffe yesterday at 13:30. 2 answers, 233 views iss velocity
During Expedition 41 Reid Wiseman and Alexander Gerst replaced a failed pump on the outside of the ISS. I am guessing they took the broken pump back inside the ISS and returned it to earth in one of the cargo...

### 2 How to make the 3d manipulator act parallel to a plane

savorok yesterday at 12:27. 2 answers, 316 views mesh
How would i be able to set my 3d manipulator so that one of the axis is parallel to the face of what im moving, i want to move it parallel to the face of the plane.

### 5 What does the error “X is not in the sudoers file. This incident will be reported.” philosophically means?

Kasramvd yesterday at 12:22. 4 answers, 364 views linux debian error-handling reportbug
Along side the question "Username is not in the sudoers file. This incident will be reported" that explained the programical aspects of the error and suggested some workarounds, I want to know: what does this error mean? X is not...

### 2 Couples sleeping in a bed in public view

RibbisRabbiAndMore yesterday at 12:17. 0 answers, 38 views halacha tznius-modesty sleep
This question / answer discusses the issue of Couple's showing affection in public. In regard to that, I was wondering whether it would be permitted / appropriate for a couple to sleep in a bed together, in a place which...

### 4 TikZ macro for mathematical operation

MathTeX yesterday at 12:12. 1 answers, 173 views tikz-pgf math-mode macros
I have the following code \documentclass[12pt,oneside]{book} \setlength{\parindent}{0em} \setlength{\parskip}{1em} \usepackage[a4paper,bindingoffset=0.2in,% left=0.5in,right=0.5in,top=1in,bottom=1in,% footskip=.25in]{geometry} \usepackage{fourier} \usepackage{amsfonts,amsmath,amssymb,amsthm} \usepackage{mathrsfs,mathtools} \usepackage{tikz,pgfplots} \usetikzlibrary{calc,arrows,arrows.meta,shapes,tikzmark,decorations.markings,decorations.pathreplacing} \usepackage[makeroom]{cancel} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage[english]{babel} \usepackage{array} \usepackage{caption} \usepackage{float} \usepackage{graphicx} \usepackage{multirow} \usepackage{longtable} \usepackage{enumitem} \usepackage{xcolor,colortbl} \usepackage[colorlinks=true,breaklinks,plainpages=false,linkcolor=blue!50!black,urlcolor=blue!50!black,citecolor=blue!50!black,bookmarks=true,bookmarksopenlevel=2]{hyperref} \usepackage{fancyhdr} \fancyhf{} \renewcommand{\headrulewidth}{0pt} \cfoot{\thepage} \begin{document} \frontmatter \pagestyle{empty} \begingroup \addtolength{\jot}{1em} \[ \begin{aligned}...

### 17 Why were Anakin and Obi-Wan the only Jedi who were assigned to rescue the Chancellor?

The Witch King of Angmar yesterday at 12:04. 2 answers, 2.218 views star-wars revenge-of-the-sith
During the Battle of Coruscant, Anakin and Obi-Wan were the only 2 Jedi who were tasked with rescuing the Chancellor. Now similar to the Battle of Geonosis, Yoda and Mace Windu bring all the Jedi on Geonosis for a rescue...

### 6 What are the scars on the face of Dryden Voss?

vikingsteve yesterday at 11:28. 2 answers, 471 views star-wars solo-a-star-wars-story
Dryden Voss, the iconic villain in Solo: A Star Wars Story, has some pretty radical facial scarring. I'm wondering if there is any evidence how he got these scars? In particular is it possible he got the scars in battle,...

### 6 Define a range for one color using Blend

Bigprophete yesterday at 11:05. 1 answers, 44 views plotting color
I use Blend to color my ListDensityPlot. In my code below, I use white for zero. I would like to use white between -0.6 to 0.6. How should I change (Blend[{{-0.6, Blue}, {0, White}, {0.6, Red}}, #] &)] graph =...

### 26 Can't delete empty folder because it is used

Black yesterday at 10:54. 4 answers, 2.680 views windows windows-10
I try to delete an empty folder, but I can't because the windows dialog says it is used at the moment. How can a empty folder be used?? How can I solve this, without having to restart the computer or...

### 4 Avoiding Slang whilst Writing

robertcday yesterday at 10:44. 4 answers, 505 views fiction creative-writing language
I sometime express my personality too much in my more creative fiction. When I get going, I include slang words and phrases that sound fascinating and are comprehensible to me, but may not be interesting or understandable to my readers....

### 9 Bake me some moji

Adám yesterday at 10:35. 7 answers, 1.131 views code-golf string conversion unicode encoding
Given a string, character list, byte stream, sequence… which is both valid UTF-8 and valid Windows-1252 (most languages will probably want to take a normal UTF-8 string), convert it from (that is, pretend it is) Windows-1252 to UTF-8. Walked-through example...

### 9 Formality of the 2nd ordered configuration space of a closed Riemann surface

If $X$ is a smooth manifold, we define its kth ordered configuration space as $$F_kX:=\{(x_1, \ldots,x_k) \; | \; x_i \neq x_j \,\, \mathrm{if} \, \, i \neq j\},$$ in other words, $F_kX = X^k - \Delta,$ where $\Delta$ is...

### 9 Innovative Ways to Provide Background Information

robertcday yesterday at 10:11. 4 answers, 1.040 views fiction storyline backstory
Think action movie. Think two heavily-armed men - one chasing the other over rooftops, down through buildings and into the mean streets of a crowded city. Think big guns, explosions and other loud noises. Think danger. Think high-octane thrills. The...

### 24 How to get past the “mystique” of Maths

This question is primarily discussing maths education for adult learners, on courses teaching engineering mathematics at an undergraduate level. These students generally never set out specifically to learn mathematics, but need to in order to obtain necessary qualifications for their...

### 17 Why didn't Western countries boycott the 2018 World Cup?

Alexei yesterday at 09:31. 4 answers, 2.866 views russian-federation sanctions western-world
According to this article Russian government believes that 2018 World Cup will help Russian economy on the medium term: a survey by the Russian government last week. It said the World Cup's boost for the country's gross domestic product (GDP)...

### 4 In which sequence should I be creating/inserting order/orderItem/pricebookEntry/product2?

rna7 yesterday at 09:12. 1 answers, 33 views apex product pricebookentry orderitem superbadges
I'm on the advanced apex super badge step 7, and before this I thought I had a good understanding of order/orderItem/pricebookEntry/product2/pricebook2 objects. However, upon creating my own relationship/data model of the objects, I'm getting a bit confused about when to...

### 30 Is it OK to review a paper which builds on my work?

Allure yesterday at 08:34. 5 answers, 3.365 views peer-review conflict-of-interest
Suppose I've written a paper which someone else (who I do not know) has built on. The new work is intimately related to mine; it would not have existed without my paper. I'm now asked to review the paper. Should...

### 10 What's wrong in this method of solving a difference equation

$$y_{n+1} = 2y_n + 1$$ To solve this I think I need find "any" one particular soln and add it to homogeneous solution. Homogeneous solution is $2^ny_0$ For particular solution if I substitute $y_n = an$, a(n+1) = 2an +...

### 4 Why was Spencer Fox replaced by Huck Milner as Dashiell “Dash” Parr in Incredibles 2?

irsha yesterday at 08:21. 1 answers, 316 views casting the-incredibles incredibles-2
Incredibles 2 is released and I noticed that Huck Milner did the voice for Dashiell "Dash" Parr in the movie. In the first film The Incredibles, Spencer Fox was the one to voice the character. Why was he replaced? Most...

### 8 How to show that an n-level system is entangled?

meowzz yesterday at 08:03. 2 answers, 445 views quantum-entanglement qubit-state qudit
"How do I show that a two-qubit state is an entangled state?" includes an answer which references the Peres–Horodecki criterion. This works for $2\times 2$ and $2\times3$ dimensional cases; however, in higher dimensions, it is "inconclusive." It is suggested to...

### 8 What causes loss of power over lifetime of a magnetron?

Joren Vaes yesterday at 07:56. 2 answers, 1.445 views microwave failure lifetime magnetron
The power of a magnetron declines over time\$^1\$. While not noticable for most consumer applications (A 2000-hour lifetime would last over 20 years if the device is used only 15 minutes a day), this is a problem in industrial situations....

### 1 What is a unified way to look at three disparate expressions having the same value?

vivek kumar yesterday at 05:47. 2 answers, 139 views calculus real-analysis
I observed that the value of each of the following expressions $\lim_{x \rightarrow 1} \frac{x^n - n x + n - 1}{(x-1)^2}$, $\sum_{i=1}^{n-1} i$ and $\int_{0}^{n} [t] dt$ are the same, that is, $\frac{n(n-1)}{2}$. What is the relationship among...

### 34 What is a “bag of rats”?

HellSaint yesterday at 05:20. 2 answers, 2.066 views terminology
I have seen the term "bag of rats" being used quite frequently (RPG.se search for bag of rats, for example), mainly, but not exclusively, in D&D. It seems to be considered a problem or exploit. What is it, where does...

### 15 Was Newt ever referenced in the Harry Potter series?

HardikT yesterday at 04:54. 4 answers, 3.899 views harry-potter fantastic-beasts
In the teaser for Fantastic Beasts: The Crimes of Grindelwald, we see that Newt works under/with Dumbledore. I was wondering, In the storyline of Harry Potter, is Newt ever referenced by Dumbledore or anyone else? I might be missing something,...

### 24 Can a raging barbarian carry live rabbits to kill them, in order to keep his rage going?

Youjay yesterday at 03:49. 3 answers, 5.858 views dnd-5e new-players barbarian rage
One of my players, a human barbarian, came up with the idea of carrying captured rabbits, feeding them and treating them nicely, so that he can rip them apart mid-battle if he knows he will be unable to attack during...

### 13 Will hardware/implementation affect the time/space complexity of algorithms?

nalzok yesterday at 02:27. 1 answers, 1.425 views algorithms algorithm-analysis data-structures runtime-analysis
I’m not even a CS student, so this might be a stupid question, but please bear with me... In the pre-computer era, we can only implement an array data structure with something like an array of drawers. Since one have...

### 3 Why did equidistant streaks of oil form on this hot pan?

Mark Kim yesterday at 02:22. 1 answers, 113 views fluid-dynamics everyday-life
Yesterday, my father-in-law sent me this photo of his greased pan: After burning olive oil on the pan and pouring out the oil, he noticed that the remaining oil formed equidistant streaks. Why did this happen? What other thin films...

### 4 Disable the “double-click to collapse cell group” feature in Mathematica?

JR S. yesterday at 01:40. 1 answers, 28 views front-end editing
I'm trying to figure out if there is a way to disable the feature of Mathematica whereby if you double click the brackets to the right of a formula + output, it collapses the output. I want to disable this...