how to touch a file to a particular location which was #defined
How do I concatenate const/literal strings in C?
Serving wp-includes (front-end) javascript from a different domain? The WordPress Codex points to an extremely simple way to change the URL of the wp-content directory, which is, adding this in wp-config.php:  define( 'WP_CONTENT_URL', 'http://example.com/wp-content');   And that does the job of serving most of the JavaScript and CSS files on my website from the different domain, except two.  http://mywebsite.com/wp-includes/js/comment-reply.js http://mywebsite.com/wp-includes/js/quicktags.js   The reason is very clear — these JavaScript files are served from within the wp-includes directory, which is not affected by the aforementioned rule.  So, is there a similar or simple method to have them served from example.com i.e. the domain of my choice? or is unregistering and enqueuing the scripts from a custom URL (done in functions.php) the only way? How do I use sudo to redirect output to a location I don't have permission to write to? Is it possible to set a CNAME record at the top of a domain? (i.e. @ CNAME www, @ CNAME foobar.com., etc.)  My ISP says that it's only possible to use CNAME's for subdomains but I've read somewhere else that is should be possible even if not recommended. I’ve run into a limitation in the cURL bindings for PHP. It appears there is no easy way to send the same multiple values for the same key for postfields. Most of the workarounds I have come across for this have involved creating the URL encoded post fields by hand tag=foo&amp;tag=bar&amp;tag=baz) instead of using the associative array version of CURLOPT_POSTFIELDS.  It seems like a pretty common thing to need to support so I feel like I must have missed something. Is this really the only way to handle multiple values for the same key?  While this workaround might be considered workable (if not really annoying), my main problem is that I need to be able to do multiple values for the same key and also support file upload. As far as I can tell, file upload more or less requires to use the associate arravy version of CURLOPT_POSTFIELDS. So I feel like I am stuck.  I have  about this problem in more detail on the cURL PHP mailing list in the hopes that someone there has some ideas about this.  Suggestions or hints on where I can look for more information on this are greatly appreciated! Use LaTeX to produce Epub I'm asking here a question which was asked on the italian TeX group forum.  Is there a way to produce Epub output automatically from a LaTeX source?  I should remark that Epub is just HTML+a subset of CSS+some XML for metadata, packed in a ZIP file. So one can settle with the existing tools for HTML conversion. Still something better could be done for Epub output.  In the first place, Epub accepts only a subset of CSS. Then it would be nice to produce the file with the metadata from the LaTeX source too. Finally, I'm not sure how it works, but Epub files allow for automatic hyphenation of words. By this I mean that hyphenation can be specified in the Epub file itself, so that a reader will not need to know hyphenation rules. Note that since Epub files are resizable, all possible points of hyphenation must be specified. I am compiling the following MWE using XeLatex within TeXnicCenter and get a garbled equation number:  \documentclass{article} \usepackage{amsmath} \usepackage{polyglossia} \setmainlanguage{hebrew} \newfontfamily{\hebrewfont}{Arial}  \begin{document} \begin{equation}\label{eq:1} 2+2=4. \end{equation} \end{document}      What is going on here? Proof with 3D vectors Let ${a} = \begin{pmatrix}x_a\\y_a\\z_a\end{pmatrix}$, ${b} = \begin{pmatrix}x_b\\y_b\\z_b\end{pmatrix}$, and ${c} = \begin{pmatrix}x_c\\y_c\\z_c\end{pmatrix}$. Show that $(x_a,y_a,z_a)$, $(x_b,y_b,z_b)$, and $(x_c,y_c,z_c)$ are collinear if and only if ${a} \times {b} + {b} \times {c} + {c} \times {a} ={0}.$  Hello,  Is there any other way to do this problem without bashing?  I can't seem to find a nice and slick solution to this.  Thanks in advance! Performance impact of updating target columns with same values ON CONFLICT This is a question about the inner-workings of Postgres (v10) and performance.  Given a table, github_repos, with a multi-column unique index on org_id and github_id columns, is there any performance difference (or other issues to be aware of) between the two bulk upsert operations below? The difference is that in the first query, the org_id and github_id columns are included in the UPDATE, whereas in the second query they are not. Since the UPDATE runs ON CONFLICT, the updated values of org_id and github_id will be the same as the old values, but those columns are included in the UPDATE because the underlying library I am using is designed that way. I'm wondering if its safe to use as-is or whether I should be explicitly excluding those columns in the UPDATE.  Query #1:  INSERT INTO "github_repos" ("org_id","github_id","name") VALUES (1,1,'foo') ON CONFLICT (org_id, github_id) DO UPDATE SET "org_id"=EXCLUDED."org_id","github_id"=EXCLUDED."github_id","name"=EXCLUDED."name" RETURNING "id"   Query #2:  INSERT INTO "github_repos" ("org_id","github_id","name") VALUES (1,1,'foo') ON CONFLICT (org_id, github_id) DO UPDATE SET "name"=EXCLUDED."name" RETURNING "id"   github_repos table:        Column       |       Type        | Collation | Nullable  -------------------+-------------------+-----------+----------+  id                | bigint            |           | not null |  org_id            | bigint            |           | not null |  github_id         | bigint            |           | not null |  name              | character varying |           | not null |  Indexes:     "github_repos_pkey" PRIMARY KEY, btree (id)     "unique_repos" UNIQUE, btree (org_id, github_id) Ways to evaluate $\int \sec \theta \, \mathrm d \theta$ C# regex pattern to extract urls from given string - not full html urls but bare links as well How can I install themes in Lubuntu? How can I compute $\mathrm{Aut}(\mathbb{Z}/4\mathbb{Z}\times\mathbb{Z}/6\mathbb{Z})$? How can I compute $\mathrm{Aut}(\mathbb{Z}/4\mathbb{Z}\times\mathbb{Z}/6\mathbb{Z})$?  If $\varphi$ is one of this automorphism then $\varphi((1,0))=(1,0),(1,3),(3,3),(3,0)$ and $\varphi((0,1))=(0,1),(0,5),(2,1),(2,5)$.  So it seems to me that this groups contains 16 elements, am i right? And if I'm right there is a way to understand to which group of cardinality 16 this is isomorphic to?  EDIT: $\mathbb{Z}/4\mathbb{Z}\times\mathbb{Z}/6\mathbb{Z}\cong\mathbb{Z}/8\mathbb{Z}\times\mathbb{Z}/3\mathbb{Z}$. And $\mathbb{Z}/8\mathbb{Z}$ and $\mathbb{Z}/3\mathbb{Z}$ are characteristic (am I right?), so $\mathrm{Aut}(\mathbb{Z}/8\mathbb{Z}\times\mathbb{Z}/3\mathbb{Z})\cong\mathrm{Aut}(\mathbb{Z}/8\mathbb{Z})\times\mathrm{Aut}(\mathbb{Z}/3\mathbb{Z})\cong\mathbb{Z}/8\mathbb{Z}^*\times\mathbb{Z}/3\mathbb{Z}^*$ and this group has cardinality 8, right? Where is my mistake? Suppose I have a document with multiple include or input statements  \input{fileA} \input{fileB}   etc.   Is there an easy way to generate a single .tex file where \input{fileA} is replaced by the actual content of fileA etc. without copying it manually? Is it Safe to Delete Files From /var/tmp? Why does the CRT formula yield a solution of a congruence system? Today I updated to version 2.18.52 &amp; I can’t see the names of the people who send me a message. The only thing I see is the WhatsApp logo and the word “message”.    I can’t also see the status my friends posts, they all look black. I uninstalled the app, reset my phone &amp; nothing seems to work so far. How to adjust the size and placement of chapter heading in report class How could I adjust the size and placement of chapter heading in my custom class? I am using report class as my base. When I used titlesec package inside my custom class, it threw error     ! Package titlesec Error: Not allowed in `easy'   settings. What are your favorite English language tools? I have a user control that I load into a MainWindow at runtime. I cannot get a handle on the containing window from the UserControl.   I have tried this.Parent, but it's always null. Does anyone know how to get a handle to the containing window from a user control in WPF?  Here is how the control is loaded:  private void XMLLogViewer_MenuItem_Click(object sender, RoutedEventArgs e) {     MenuItem application = sender as MenuItem;     string parameter = application.CommandParameter as string;     string controlName = parameter;     if (uxPanel.Children.Count == 0)     {         System.Runtime.Remoting.ObjectHandle instance = Activator.CreateInstance(Assembly.GetExecutingAssembly().FullName, controlName);         UserControl control = instance.Unwrap() as UserControl;         this.LoadControl(control);     } }  private void LoadControl(UserControl control) {     if (uxPanel.Children.Count &gt; 0)     {         foreach (UIElement ctrl in uxPanel.Children)         {             if (ctrl.GetType() != control.GetType())             {                 this.SetControl(control);             }         }     }     else     {         this.SetControl(control);     } }  private void SetControl(UserControl control) {     control.Width = uxPanel.Width;     control.Height = uxPanel.Height;     uxPanel.Children.Add(control); } Q. Find all pairs $(p,n)$ of positive integers where $p$ is prime and $p^3-p=n^7-n^3$.   Rewriting the given equation as $p(p+1)(p-1)=n^3(n^2+1)(n+1)(n-1)$, we see that $p$ must divide one of the factors $n,n+1,n-1,n^2+1$ on the $\text{r.h.s}$.   Now, the $\text{l.h.s}$ is an increasing function of $p$ for $p\ge1$. This implies that for any given $n\ge1$, there is exactly one real $p$ for which $\text{l.h.s}=\text{r.h.s}$. For $p=n^2$, we get $\text{l.h.s}=n^6-n^2&lt;n^7-n^3=\text{r.h.s}.$ This means that either $p&gt;n^2$ or $p&lt;n^2$ must hold.  Assuming $p&gt;n^2$, it follows that the prime $p$ cannot divide any of $n,n+1,n-1$. So $p$ must divide $n^2+1$ and hence $p=n^2+1\quad (\because p&gt;n^2)$.  Substituting the value of $p$ in the given equation we get, $n^2+2=n^3-n\implies n^3-n^2-n=2$. As the factor $n$ on the $\text{l.h.s}$ must divide $2$, the above equation has a unique integer solution $n=2$.  Finally, we get $(5,2)$ as the solution to the given equation.      But how do I conclude this is the only solution possible? Also, why does'nt $p&lt;n^2$ (the case which I ignored) hold? As a bonus question, I would like to ask for any alternative/elegant solution (possibly using congruence relations) to the problem.