From my android application, how can detect if connection to the server whose IP for example is 192.168.32.232 is lost? Once connection is lost, I want write a service class which will keep on check for connection to the server in the background. If connection is lost my app should show a dialogue box.
Let's say I'm running a simple server and have accept()ed a connection from a client.  What is the best way to tell when the client has disconnected? Normally, a client is supposed to send a close command, but what if it disconnects manually or loses network connection altogether? How can the server detect or handle this?
I'm a web designer and I'd like to make a custom wordpress theme for my upcoming blog. The template is already made in photoshop but I need a good starting point. I don't have too much experience with Wordpress but I want something that is SEO friendly which I can edit without risking getting poor search results.  I Know about Starkers and that there are other blank themes out there, but are they good for SEO? What does a tilde in angle brackets mean when creating a Java generic class? Truly destroying a PHP Session? Convergence of Ratio Test implies Convergence of the Root Test How do I scan for viruses with ClamAV? $X\sim\mathrm{Poisson}(\lambda_1 = 5)$ and $Y\sim\mathrm{Poisson}(\lambda_2 = 15)$. Let $Z = X + Y$ . Compute $\mathrm{Corr}(X, Z)$. I have a text file abc.txt and its contents are:     /lag/cnn/org/one.txt    /lag/cnn/org/two.txt    /lag/cnn/org/three.txt   If I use:  $ tar -cvf allfiles.tar -T abc.txt   I'm getting the tar of files in the list. Similarly is it possible to copy those files in abc.txt to a folder?  I tried this:              $ cp --files-from test1.txt ./Folder   But it is not working. SObject row was retrieved via SOQL without querying the requested field on Contact.Account I am getting this error:     SObject row was retrieved via SOQL without querying the requested   field: Contact.Account   Controller:  public class WrapperAccountCtrl {      public List&lt;Account&gt; acclist{get;set;}     public List&lt;Contact&gt; conlist{get;set;}      public List&lt;MyWrapper&gt; wap{get;set;}      public WrapperAccountCtrl()      {         acclist=[Select id,name from Account];          conlist=[Select id,name,AccountID  from contact where AccountID IN:acclist];          system.debug('Size----'+conlist.size());           wap=new List&lt;MyWrapper&gt;();           for(integer i=0;i&lt;acclist.size();i++)          {              wap.add(new MyWrapper(conlist,acclist[i]));          }     }      public class MyWrapper     {          public Account accn{get;set;}          public List&lt;Contact&gt;conrec{get;set;}          public MyWrapper(List&lt;Contact&gt; con,Account acc)         {             accn=acc;             conrec=con;             }     } }   VF Page:  &lt;apex:page controller="WrapperAccountCtrl" sidebar="false"&gt;       &lt;apex:form &gt;          &lt;apex:pageBlock &gt;              &lt;apex:pageBlockTable value="{!conlist}" var="c"&gt;                  &lt;apex:column value="{!c.account.Name}"/&gt;              &lt;/apex:pageBlockTable&gt;          &lt;/apex:pageBlock&gt;      &lt;/apex:form&gt;  &lt;/apex:page&gt; A does the same B as does C Ubuntu 16.04 hangs on splash screen during boot That's all they give you. I tried putting it into the linear approximation equation of:  $$ f(a)+f'(a)(x-a) $$  but I get almost the same value as $64.07^{2/3}$, which is around $16.0116$. Just not sure how else to go about doing this problem. Thanks. the problem of using "~\\" and blank line Recently,I found the code that cotains the"~\\" and blank line always shows the warning imformation "Underfull \hbox (badness 10000) in paragraph at lines"  \documentclass{ctexart} \usepackage{color} \usepackage{amsmath} \usepackage{amssymb} \usepackage{graphicx} \usepackage{epstopdf} \hfuzz=\maxdimen   $(A \pm  B)^{-1} \neq A^{-1} \pm B^{-1}$,$(A \pm  B)^* \neq A^* \pm B^*$~\\  $|(A^*)^*|=|A|^{n^2-2 n+1}$~\\  \end {document}   I add the code:  \tolerance=10000 \hbadness=10000 \begin{document}   However,fail to solve it! Show that $\tan{(\pi/7)} \tan{(2\pi/7)}\tan{(3\pi/7)}=\sqrt{7}$ ASP.NET "special" tags What is the official name for the "special" ASP.NET tags like this:  &lt;%# %&gt; &lt;%= %&gt; &lt;%@ %&gt; &lt;%$ %&gt;   I can't seem to figure out the conceptual or well known name for these, so I'm having trouble searching for more info.  As a bonus, can anyone give me a quick rundown of all of the possible "special tags" and what each one of them does (or point me to a resource)? Show all of my question/answers to me even if they are deleted I would really like to see all of my questions and answers on the profile page, even if some of them were deleted, and I don't have enough rep to see them on the site. (Note that some questions are  after 30 days or 1 year, and the author might be oblivious about what happened.)   , the &quot;deleted recent [questions/answers]&quot; links in one's own user profile now list all respective posts that were deleted in the past 60 days, rather than just those that were originally posted in the last 60 days. , users with the &quot;access to moderator tools&quot; privilege (10k+ on designed sites, 2k+ on beta and non-designed sites) can use the search operator deleted:1 to see all their own deleted posts. , deleted questions and answers that were posted in the past 60 days, can be seen using the &quot;deleted recent questions&quot; and &quot;deleted recent answers&quot; links on the questions and answers tabs (at the bottom of the tab) in your user profile. For older posts: as of 2013-04-23 you can  if you already have a link to them, but they still aren't linked from the user profiles (not even just for you). Nor do you see inbox notifications for comments on them if you come back a few hours later. You have to have thought to bookmark your question, or you have to go digging for it in your browser history. Use integral test to show that Gaussian Integral $\int_{-\infty}^{\infty} e^{-x^2} \ dx$ converges? There's a question in my book (it's a school-specific textbook) saying:  Use the integral test to show $$\int_{-\infty}^{\infty} e^{-x^2} \ dx$$ (the Gaussian Integral) converges.  The integral test says if the integral converges, so does the series. But I have no idea how to represent this as a series, do I need to?   I'm not looking to evaluate it - I've read about it online - but how do I use the integral test here?  Thanks How do I test a private function or a class that has private methods, fields or inner classes? How do I unit test (using xUnit) a class that has internal private methods, fields or nested classes? Or a function that is made private by having  (static in C/C++) or is in a private () namespace?  It seems bad to change the access modifier for a method or function just to be able to run a test. I have used so many things like url removal request and deleted the pages etc., but still the errors are shown in my webmaster tools.  How can I remove the urls completely from Google? Eeeek! Code blocks are misbehaving! So code blocks in questions and answers on the android app (inline included) seem to be scared of me putting my finger in them. When I poke them, they only move over two columns!  (For clarity, these are the code blocks that overlap the TextArea view because they've been eating too much)  The intended behaviour here is that when I press my finger into a code block, the touch event should register a drag; at current, I try to scroll inside a code block and I end up switching to question or answer view instead, over and over.  EDIT:  Something tells me this is status-bydesign because the text is deliberately cut off (probably inviting you to click on the code block and expand it; UX Decision?): How do I set environment variables from Java?  I see that I can do this for subprocesses using . I have several subprocesses to start, though, so I'd rather modify the current process's environment and let the subprocesses inherit it.  There's a System.getenv(String) for getting a single environment variable. I can also get a Map of the complete set of environment variables with System.getenv(). But, calling put() on that Map throws an UnsupportedOperationException -- apparently they mean for the environment to be read only. And, there's no System.setenv().  So, is there any way to set environment variables in the currently running process?  If so, how?  If not, what's the rationale?  (Is it because this is Java and therefore I shouldn't be doing evil nonportable obsolete things like touching my environment?)  And if not, any good suggestions for managing the environment variable changes that I'm going to need to be feeding to several subprocesses?