Is there a shortcut for selecting the suggested user when tagging in a comment?
Keyboard shortcut to autocomplete the user in comments
round in PHP shows scientific notation instead of full number I'm trying to do an echo of a variable containing 1400000.  so there is written: echo round(1400000); this gives 1,4E+6 instead of the full number. Anybody an idea on how to display it fully? How do I show that the sum $(a+\frac12)^n+(b+\frac12)^n$ is an integer for only finitely many $n$? Show that if $a$ and $b$ are positive integers, then $$\left(a +\frac12\right)^n + \left(b+\frac{1}{2}\right)^n$$is an integer for only finitely many positive integers $n$.   I tried hard but nothing seems to work. :( Integral involving Cosine function What will be the formula for the following:  $$\int_0^\infty \cos(x)dx.$$ Remove Escape on TouchBar in Safari The question "How to disable Escape key in Safari" was asked here a few times. Now since on the new MacBook Pros the Escape key is a touchscreen button, it is much easier to press it accidentally, but there is a good chance we can actually remove it in Safari once and for all.  How to remove  Escape button from TouchBar in Safari? (or any specific app)  There is no such option in Customize Touch Bar... menu: How can I restrict a user on the SSH server to allow them only the privileges for ? i.e. So they cannot run commands even if they log in via SSH.  My Linux servers are Ubuntu 11.04 and OpenWrt. Will upgrading Windows 8 to 8.1 affect Ubuntu? It's a rather simple question (I hope). I currently have Windows 8 and I am dual booting it with Ubuntu 13.04.   If I were to install the latest update for Windows 8, that being 8.1, will it affect Ubuntu or will there be any conflicts between the two? How do you get the logical xor of two variables in Python? How might I schedule a C# Windows Service to perform a task daily? I have a service written in C# (.NET 1.1) and want it to perform some cleanup actions at midnight every night. I have to keep all code contained within the service, so what's the easiest way to accomplish this? Use of Thread.Sleep() and checking for the time rolling over? Is it possible to run commands from spotlight? I run commands in terminal a lot and i'm wondering if it is possible to run the commands from spotlight. For example in spotlight  would like to run the command(because i have a lot of network issues):   ping google.com   And then spotlight to load terminal and execute the command instead of having to load terminal because it takes so long to load. So is this possible? Received an email intended for another person Let $F$ be a Galois extension over $\mathbb{Q}$ with $[F:\mathbb{Q}]=2^n$, then all elements in $F$ are constructible Let $F\subseteq\mathbb{C}$ be a Galois extension of $\mathbb{Q}$ such that $[F:\mathbb{Q}]=2^n$; then all elements in $F$ are constructible.    Added.  Here is what I have so far.  Since there exist the finite normal extension $F\subseteq\mathbb{C}$ over $\mathbb{Q}$ which contains an element say, s, then s has a degree of power of 2. From group theory we have 2 propositons we could use. 'A group $G$ is solvable iff it has a normal series whose factors are abelian', and also 'If $G$ is solvable and $N\triangleleft G$, then $G/N$ is solvable'. Then we can say that the galois group F has a normal series $\{e\}=G_0\triangleleft G_1\triangleleft\cdots\triangleleft G_n=\mathrm{Gal}(F/\mathbb{Q})$, whose factors have order 2. Thus there must exist intermediate fields $\mathbb{Q}=F_0 \subseteq F_1 \subseteq F_2 \subseteq\cdots\subseteq F_n=F$, such that $[F_{j+1}:F_j]=2$ for all $j$. Now this is where I got stuck. Next I need to somehow show that $F_{j+1}=F_j(s_j)$, where $s^2_j$ is an element in $F_j$. Then I think I can conclude that if $s_j$ is constructible than every element in $F_{j+1}$ is constructible... then with $F_n$ is constructible... Deserializing JSON when sometimes array and sometimes object Why can't I catch Pokemon in Pokemon Go anymore? I'm level 10 on Pokemon Go. I've caught at least 150 Pokemon, and had no problems. Now, every time I try to catch a Pokemon, no matter the level, it just rolls twice in the pokeball, breaks free, then runs away. Can anyone provide some insight on how to fix this problem? How can I get an underbrace and an overbrace to partially overlap in an equation? Sometimes I want to describe portions of an equation using \underbrace and \overbrace in such a way that the portions are not completely distinct, for example:          /-------\ x = A + B + C + D + E     \-------/   \---/      What is the best way to do this? Winter Bash 2014 Secret Hats Show that $\arctan\frac{1}{2}+\arctan\frac{1}{3}=\frac{\pi}{4}$ Show that $\arctan\frac{1}{2}+\arctan\frac{1}{3}=\frac{\pi}{4}$.   Attempt:  I've tried proving it but it's not equating to $\frac{\pi}{4}$. Please someone should help try to prove it. Is anything wrong with the equation? If there is, please let me know. GZip of drive image created by using `dd` command I created yesterday a drive image using GZip.  I opened the 51.3 GiB file named ssd.img.gz to see one icon thats a package of 3.9 GiB, yes, thats THree point Nine Gigabytes in size and has the name of the image as ssd.img  That does not seem right to me, has the image creation worked or not?  Yes the drives have data and an operating system on it.  Should I have used cat instead? only I did and it kept on saying that it had nothing to do.  Would using the | zip instead be a better option?    ** EDIT **  The command used was:  mark@zotac:~$ sudo -l Enter password:&lt;entered password to get in to root&gt; root@zotac:~# dd if=/dev/sda | gzip -c &gt; "/media/mark/Seagate External Drive/ssd.img.gz   the terminal spent the best part of 10 Hours at building the image, something in itself that I also found suspect, why so log when copying the files to a folder that I wanted, some 40GiB took 45 minutes...  The source drive /dev/sda had no mounted partitions.     ** EDIT **  Just to clarify, I am trying to make an image of the drive to back up later if things go wrong with a repair, the drive itself needs to be a file on a drive as the target drive partition is using almost all of the drive, the partitions can't be resized on it without formatting it and I am not about to lose 1.4TB of data.   So the dd if=/dev/sda of=/&lt;target&gt; isn't what I need, what I do need is an image of the drive that I can restore the image from to the drive should the repair go wrong.  So what command do I use, dd or cat? Why does | zip keep telling me it has nothing to do when used with cat but no error or warning with dd How to install an application that requires gksu package on ubuntu 18.04? I downloaded the Upwork desktop App on ubuntu 18.04. When I open it with Gdebi package installer I saw this error:    I tried to install gksu manually via sudo apt install gksu but I got this error  Building dependency tree        Reading state information... Done Package gksu is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source  E: Package 'gksu' has no installation candidate   How can I install this software on ubuntu 18.04 (I download it yesturday so it is the most recent version on upwork website) ? Change HTML Produced by wp_list_comments() I am developing a WordPress theme for which I would like each comment's timestamp wrapped in in a &lt;span&gt; element for the sake of styling it with CSS rules. However,  as I use it in my theme's comments.php template does not seem to provide options to alter the HTML produced:  &lt;ol class="comment-list"&gt;     &lt;?php         wp_list_comments( array(             'style'       =&gt; 'ol',             'format'      =&gt; 'html5',             'short_ping'  =&gt; true,         ) );     ?&gt; &lt;/ol&gt;   which produces timestamps as such:  &lt;time datetime="2015-12-21T19:09:49+00:00"&gt; december 21st,  2015 on 19:09 &lt;/time&gt;   How can I alter the function's output to include a &lt;span&gt;element around each &lt;time&gt; element without altering core files?  I've tried looking at my theme's functions.php, as well as WordPress wp-includes/comment.php and wp-includes/comment-template.php. None of them deal with the actual tag structure of the comment timestamps generated by wp_list_comments(), so there was nothing there for me to play with. Is expression for law of equipartion of energy valid for real gas? I know that according to law of equipartion of energy ,energy per molecule per degree of freedom is 1/2 Kb T I wanted to know if it is true for a real gas ?