Using string functions, how i get values form html attributes in C#?
What is the best way to parse html in C#?
Using ST_Union in PostGIS I have a spatial table (polygons,polylines) in a database. These are digitized by multiple people. For example, a state is divided into multiple Grids and given to multiple people to digitize using QGIS; which is connected to a postgres database. Now, I have to merge all those polygons and polylines. I don't know how to do this via ST_Union. I Used the following snippet to merge the polygons and polylines CREATE TABLE schema_name.polygon_un2 AS SELECT upg.un_geom,npg.Column1,npg.Column2,npg.Column3,npg.Column4,npg.Column5  FROM (  SELECT st_union(the_geom) As un_geom,(   SELECT oid FROM schema_name.polygon    WHERE oid = 100748191   ) FROM schema_name.polygon WHERE oid IN (100748191,100763519)  ) upg  INNER JOIN schema_name.polygon npg ON npg.oid = upg.oid;   DELETE FROM schema_name.polygon WHERE oid IN (100748191,100763519);  I have the interesecting polygon oid in a Seperate Table, I want to do this process in an update query and that should be a dynamic plpgsql function.  Green : Grid , Other : Polygon But This snippet did not work !! The snippet which i expect is  It should create a new row for the merged polygons and polylines (eg oid - 1 and 2 merged to oid 3).  The polygons which are not merged (eg 1 and 2 should be deleted) A pseudometric on the space of the measurable functions is complete 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) ? I am aware that, to use a Spell Scroll, you must have the related spell on (at least one of) your spell list(s). Then, if you have the spell slot to cast it, you succeed automatically; else, you must make an ability check in order to cast it (failure resulting in the scroll being wasted).  Consider this example : A Cleric 5 / Wizard 4 finds a Raise Dead Spell Scroll. The spell is on the Cleric List, but is a fifth level spell. Considering that the cleric-wizard has fifth level slots, but can only pick up to third level cleric spells, would he have to make the ability check to successfully cast the Raise Dead in the Spell Scroll, or would he succeed automatically ? Does anyone know the location of this login hotmail background? How to make \left, \right pairs of delimiter work over multiple lines? I have a very long equation that must be separated into two lines, and it has several pairs of nesting \left \right delimiters. Unfortunately, it seems that they need to be on the same line in order for them to work.  Also I'm using the align environment because I need the aligning functionality. Is there a way to have the size of delimiters automatically adjusted over multiple lines? How to "Hide a Collection in viewport" but not "Disable in Viewport" via script in Python Hi Blender coders and artists.  I am updating one of my add-ons for Blender 2.8 and have run into some  issues finding the appropriate way to hide a collection that is added to my scene.  I want to deselect the eyeball on the toolbar with a python command in a script but I don't want to disable the collection in the view-port entirely as it is used as a collection in a particle system.   I just want to deselect the eyeball circled in green below.  Anyone know the python API for this? Richard Stallman states that Ubuntu "has installed surveillance code". See:   Is this true?   I agree with him that "Any excuse Canonical offers is inadequate....". Extension of degree 2 with characteristic not 2 I am told that $K \leq L$ is a field extension of degree 2 and that $K$ has characteristic not 2. I am then asked to show that $\exists \: \alpha \in L$ such that $L = K(\alpha), \; \alpha^2\in K $  So far I have that:  $\exists \; \alpha_1, \alpha_2 \in L$ such that $L = K( \alpha_1, \alpha_2)$  $\Rightarrow |L:K| = |L:K(\alpha_1)| |K(\alpha):K| $ so $|K(\alpha):K| = 1$ or $2$  $|K(\alpha_1):K| = 2 \Rightarrow L = K(\alpha_1)$ and $deg(f_{\alpha_1}(t)) = 2  $ where $f_{\alpha_1}(t)$ is the minimal polynomial of $\alpha_1$ over $K$   So $f_{\alpha_1}(t) = t^2 + at + b$ for some $a,b \in K$  Also, $|K(\alpha_1):K|=1 \Rightarrow K(\alpha_1) = K$ and $L = K(\alpha_2)$ which means $degf_{\alpha_2}(t) = 2$ where $f_{\alpha_2}(t)$ is the minimal polynomial of $\alpha_2$ over $K$.   So $f_{\alpha_2}(t) = t^2 + at + b$ for some $a,b \in K$  Given that we consider the same polynomial each time, relabel to consider:   $f_{\alpha}(t) = t^2 + at+ b $ for some $a,b \in K$  We have already demonstrated that $L=K(\alpha)$ for some $\alpha \in L$ so now we much show that $\alpha^2 \in K$  $\alpha^2 \in K \Leftrightarrow a = 0_K$  I now have no idea how to show that this coefficient of $f_{\alpha}(t)$ is necessarily $0$.   I know that $f_{\alpha}(t)$ has two roots in $L$ and that because $K$ and thus $L$ has characteristic not 2, they cannot be the same root, but I don't know how to then conclude that they must sum to $0$  Any help would be greatly appreciated. Confused About Trigonometric Substitution How to disable javascript modal popup ads How can I reset or revert a file to a specific revision? I have made some changes to a file which has been committed a few times as part of a group of files, but now want to reset/revert the changes on it back to a previous version.   I have done a git log along with a git diff to find the revision I need, but just have no idea how to get the file back to its former state in the past. I'm trying to show that $\lvert \lVert x \rVert - \lVert y \rVert \rvert \overset{\heartsuit}{\leq} \lVert x-y \rVert$. A hint would be nice. Simultaneously merge multiple data.frames in a list Why do fantasy writers depict pointy hats as the headgear of choice for Witches and Wizards? They don't always wear a hat, but when they do, it's pointy.   Why do fantasy writers depict pointy hats as the headgear of choice for Witches and Wizards? I am trying to slice up my models using the Boolean modifier.  After applying the modifier on my smooth mesh, I get the expected result, a flat dissection to separate my mesh into two.  The problem lies in how I can resolve the visual "jaggered" edge that separates my (smooth) mesh exterior from the flat dissection face.    Is it possible to achieve a smooth-to-flat variation without this artifact?   I tried to alter a mixture of the two but end up with artifacts, or unwanted blocky flat mesh faces around the dissection edge of my mesh. How do I break out of a loop in Perl? I'm trying to use a break statement in a for loop, but since I'm also using strict subs in my Perl code, I'm getting an error saying:     Bareword "break" not allowed while   "strict subs" in use at ./final.pl   line 154.   Is there a workaround for this (besides disabling strict subs)?  My code is formatted as follows:  for my $entry (@array){     if ($string eq "text"){          break;     } } copy files over ssh Please suggest me any particular unnecessary file that I can clean to back everything to normal condition(temporarily). (i.e. any log or archieve or anything ). My var/log has only 40MB and Home directory has 3GB of space(so I believe that's not a problem). Other than that what I can clean up to make space.   [user@host]$ df -h Filesystem            Size  Used Avail Use% Mounted on /dev/mapper/vg_inamivm-lv_root                        18G   17G     0 100% / tmpfs                 1.9G     0  1.9G   0% /dev/shm /dev/sda1             485M   71M  389M  16% /boot   I am in a debian machine.   UPDATE1:  output of  cd /; du -sxh *  6.1M    bin 61M     boot 156K    dev 22M        etc 3.3G    home 306M    lib 18M     lib64 16K     lost+found 4.0K    media 4.0K    mnt 408K    opt du: cannot access `proc/18605/task/18605/fd/4': No such file or directory du: cannot access `proc/18605/task/18605/fdinfo/4': No such file or directory du: cannot access `proc/18605/fd/4': No such file or directory du: cannot access `proc/18605/fdinfo/4': No such file or directory 0       proc 208K    root 9.7M    sbin 0       selinux 4.0K    srv 0       sys 8.0K    tmp 536M    usr 187M    var   Update2  Output of ls -la /  dr-xr-xr-x.  22 root root  4096 Aug  7 08:42 . dr-xr-xr-x.  22 root root  4096 Aug  7 08:42 .. -rw-r--r--.   1 root root     0 Aug  7 08:42 .autofsck dr-xr-xr-x.   2 root root  4096 Mar 28 16:53 bin dr-xr-xr-x.   5 root root  1024 Mar 28 16:54 boot drwxr-xr-x.  16 root root  3580 Sep  9 03:13 dev drwxr-xr-x.  69 root root  4096 Aug 23 09:19 etc drwxr-xr-x.   9 root root  4096 Jun 29 16:10 home dr-xr-xr-x.   8 root root  4096 Mar  7  2012 lib dr-xr-xr-x.   9 root root 12288 Mar 28 16:53 lib64 drwx------.   2 root root 16384 Mar  7  2012 lost+found drwxr-xr-x.   2 root root  4096 Sep 23  2011 media drwxr-xr-x.   2 root root  4096 Sep 23  2011 mnt drwxr-xr-x.   3 root root  4096 Mar  7  2012 opt dr-xr-xr-x. 355 root root     0 Aug  7 08:42 proc dr-xr-x---.   5 root root  4096 Aug 17 18:27 root dr-xr-xr-x.   2 root root  4096 May  2 09:13 sbin drwxr-xr-x.   7 root root     0 Aug  7 08:42 selinux drwxr-xr-x.   2 root root  4096 Sep 23  2011 srv drwxr-xr-x.  13 root root     0 Aug  7 08:42 sys drwxrwxrwt.   3 root root  4096 Sep 13 03:37 tmp drwxr-xr-x.  13 root root  4096 Mar 28 17:53 usr drwxr-xr-x.  18 root root  4096 Mar  7  2012 var Beamer: \nonumber equivalent for slides? Is there an equivalent command to \nonumber when one doesn't want to include certain slides in the numbering? I would like to leave outline and title slides out of my numbering, and instead just number slides with actual content. Other workarounds would be nice to know about as well.  Edit: Since a MWE example was requested, here is one. Suppose I have a title page and two other slides. The code below gives a slide counter that goes up to 3, and the title slide is slide 1. I would prefer to have the title slide not be numbered, the counter go up to 2, and the the numbering start at the slide after the title. Here is some code.  \documentclass{beamer}  \mode&lt;presentation&gt;  {    \usetheme{Dresden}  }   \setbeamertemplate  {footline}{\quad\hfill\insertframenumber/\inserttotalframenumber\strut\quad}    \begin{document}  \begin{frame}  \titlepage \end{frame}  \begin{frame} Some actual content here \end{frame}  \begin{frame} Some more actual content here \end{frame}  \end{document}