In Data Explorer, looking through some SO data, I noticed that some comments have 0 for Score, while others are null. Why is this? Is there a difference between 0 and null comment scores?
While researching my theory that , I noticed that there are surprisingly few posts with zero comments.  Here's what the  looks like:  That graph was generated using the following SQL: select CommentCount, count(*)  from Posts  where CommentCount &lt; 30 group by CommentCount order by CommentCount  The huge distribution disconnect makes me think comments are not being counted correctly.
Rewiring a switch controlled receptacle to a ceiling light This was Problem 3 (first day) of the 1990 IMO. A full solution can be found      How many rationals of the form $\large \frac{2^n+1}{n^2},$ $(n \in \mathbb{N} )$ are integers?   The possible values of $n$ that i am able to  find is $n=1$ and $n=3$, so there are two solutions and this seems to be the answer to this problem.  But now we have to prove that no more of such $n$ exists, and thus the proof reduces to: Proving that $n^2$ does not divides $2^n+1$ for any $n \gt 3$.  Does anybody know how to prove this? Partition on sublists beginning with a certain marker elements Java Socket why server can not reply client My regex is matching too much. How do I make it stop? I have this gigantic ugly string: J0000000: Transaction A0001401 started on 8/22/2008 9:49:29 AM J0000010: Project name: E:\foo.pf J0000011: Job name: MBiek Direct Mail Test J0000020: Document 1 - Completed successfully  I'm trying to extract pieces from it using regex. In this case, I want to grab everything after Project Name up to the part where it says J0000011: (the 11 is going to be a different number every time). Here's the regex I've been playing with: Project name:\s+(.*)\s+J[0-9]{7}:  The problem is that it doesn't stop until it hits the J0000020: at the end. How do I make the regex stop at the first occurrence of J[0-9]{7}? Is it a good practice to refer to countries, ships etc using the feminine form? While talking about ships and countries, is it a good practice to use the feminine form?  For example:  "Her economy" - while referring to a country's economy "Her flag (or deck etc)" - while referring to a ship  Is this practice common? Is it used today? I have come across a question about determining possible minimal polynomials for a rank one linear operator and I am wondering if I am using the correct proof method.  I think that the facts needed to solve this problem come from the section on Nilpotent operators from Hoffman and Kunze's "Linear Algebra".     Question: Let $V$ be a vector space of dimension $n$ over the field $F$ and consider a linear operator $T$ on $V$ such that $\mathrm{rank}(T) = 1$.  List all possible minimal polynomials for $T$.   Sketch of Proof:   If $T$ is nilpotent then the minimal polynomial of $T$ is $x^k$ for some $k\leq n$.  So suppose $T$ is not nilpotent, then we can argue that $T$ is diagonalizable based on the fact that $T$ must have one nonzero eigenvalue otherwise it would be nilpotent (I am leaving details of the proof of diagonalization but it is the observation that the characteristic space of the nonzero eigenvalue is the range of T and has dimension $1$).  Thus the minimal polynomial of $T$ is just a linear term $x-c$.    Did I make a mistake assuming that $T$ can have only one nonzero eigenvalue?  Thanks for your help A random variable that induces a $\sigma$-algebra the same as the one in the sample space How to use the keyboard to drag and drop? A geometric sequence has its first term equal to $12$ and its fourth term equal to $-96$.   How do I find the common ratio? And find the sum of the first $14$ terms Unexpected Results From Clicking The Unanswered Button While I am familiar with Descartes and the oft-quoted idea, I think therefore I am, I am not familiar with any philosophy that actively sought to rationalize that anybody else exists.  Are there philosophers who analyzed this question? Or is it taken for granted that it is (im)possible for anybody to validate their own existence to somebody else? I want to do:  int a = 255;  cout &lt;&lt; a;   and have it show FF in the output, how would I do this? Can you use a readied action to teleport out of the way of a weapon attack? Let's say that a player uses the ready action and says "If a character aims at me with a weapon, I'll use Teleport to move behind cover."  What happens? Does this work? If not, please cite the rules to explain why not. I'm trying to connect two PCs for desktop sharing, I was able to set up ssh shell and file sharing but I failed to connect to VNC server.  There are additional packages that I need to install on my machines?  And how should I fill this dialog: How to Highlight a Row on Active Status I have a column which should define in list if the issue is in status: -Not Started, Active, Completed.   I would like to ideally add some colour to this by the row for example if completed it is green or active it is red. Then it highlights the whole row, do you know if this can be edited within the columns settings or if there any step by step instructions that can be followed to make this change? (ideally for someone new to sharepoint)  Thank You I want create my own IDE but I want a code editor that would syntax highlighting.  I want to embed it as a control into a WPF window.  Malcolm Is it correct to hyphenate with compound premodifiers? If so, where is the hyphen placed? How do you clear a stringstream variable? I've tried several things already,  std::stringstream m; m.empty(); m.clear();   both of which don't work. Is there any way to keep the URLs in the same form they are saved within the .bib files when using biblatex-chicago with Biber? For instance, the entry  @misc{RussianEmpire.1855,  author = {Russian Empire},  year = {1855},  title = {Treaty of Shimoda},  url = {https://ru.wikisource.org/wiki/Симодский_договор_с_Японией_(1855)}, }   results in the following output:    While there certain are benefits to converting the link itself, this sort of output in the footnote makes it both ugly and difficult to re-enter the link when reading a printed copy. How would one proceed about to receive the output along the lines of ""?  Minimal working example:  %!TEX program = xelatex \documentclass{article}  \usepackage{fontspec} \usepackage[russian,british]{babel} \newfontfamily\russianfont[Script=Cyrillic]{CMU Serif}  \usepackage[CJK, Cyrillics]{ucharclasses} \setTransitionsForCyrillics{\russianfont}{} \usepackage{csquotes} \usepackage[labeldate,backend=biber]{biblatex-chicago} \addbibresource{bibliography.bib} \usepackage[unicode,hidelinks]{hyperref}  \begin{filecontents}{bibliography.bib} @misc{RussianEmpire.1855,  author = {Russian Empire},  year = {1855},  title = {Treaty of Shimoda},  url = {https://ru.wikisource.org/wiki/Симодский_договор_с_Японией_(1855)}, } \end{filecontents}  \begin{document}  Cyrillics support test: Тест\\  \cite{RussianEmpire.1855}  \end{document}   Output: