Search Results

Search found 7722 results on 309 pages for 'pitfalls to avoid'.

Page 171/309 | < Previous Page | 167 168 169 170 171 172 173 174 175 176 177 178  | Next Page >

  • Unable to make 2 parallel TCP requests to the same TCP Client

    - by soldieraman
    Error: Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall Situation There is a TCP Server My web application connects to this TCP Server Using the below code: TcpClientInfo = new TcpClient(); _result = TcpClientInfo.BeginConnect(<serverAddress>,<portNumber>, null, null); bool success = _result.AsyncWaitHandle.WaitOne(20000, true); if (!success) { TcpClientInfo.Close(); throw new Exception("Connection Timeout: Failed to establish connection."); } NetworkStreamInfo = TcpClientInfo.GetStream(); NetworkStreamInfo.ReadTimeout = 20000; 2 Users use the same application from two different location to access information from this server at the SAME TIME Server takes around 2sec to reply Both Connect But One of the user gets above error "Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall" when trying to read data from stream How can I resolve this issue? Use a better way of connecting to the server Can't because it's a server issue if a server issue, how should the server handle request to avoid this problem

    Read the article

  • search & replace on 3000 row, 25 column spreadsheet

    - by Deca
    I'm attempting to clean up data in this (old) spreadsheet and need to remove things like single and double quotes, HTML tags and so on. Trouble is, it's a 3000 row file with 25 columns and every spreadsheet app I've tried (NeoOffice, MS Excel, Apple Numbers) chokes on it. Hard. Any ideas on how else I can clean this thing up for import to MySQL? Clearly I could go through each record manually, row by row, but would like to avoid that if at all possible. Likewise, I could write a PHP script to handle it on import, but don't want to put the server into a death spiral either.

    Read the article

  • How do I adjust overall width of rdlc report when some columns are hidden?

    - by user115487
    I have a customizable rdlc report where the user can choose which columns to show. All the columns are included in the report designer, and I use parameters to hide/show columns based on the user's choice. The report renders correctly, and only shows the selected columns, HOWEVER, the overall width of the report is the same as if all the columns were visible. This means that the report can have a huge empty area to the right of the selected columns, which looks very silly. So my question: Is there a way to adjust the report width dynamically at runtime to avoid a large silly empty area in the report? I attempted to do this in the designer by assigning a parameter to the width of the report body....but that was not allowed. The width cannot be an expression of any kind in the designer, only an actual value is allowed. Any suggestions?

    Read the article

  • In LaTeX prefer figures on text-heavy pages.

    - by bjarkef
    Hi LaTeX seems to have a preference for placing figures together on a page, and placing surrounding text on a separate page. Can I somehow change that balance a bit, as I prefer figures to break up the text to avoid too black text-heavy pages. Example: \section{Some section} [Half a page of text] \begin{figure} [...] \caption{Figure text 1} \end{figure} [Half a page of text] \begin{figure} [...] \caption{Figure text 2} \end{figure} [More text] So what LaTeX usually does is to stack the two half pages of text on a single page, and the figures on the following page. I believe this really gives a bad balance, and bores the reader. So can I change that somehow? I know about postfixing the \begin{figure} with [ht!], but often it does not really matter. I would like to configure the balancing algorithms in LaTeX to naturally prefer pages with combined figures and text.

    Read the article

  • Launching Vim via Lua

    - by Keith Pimmel
    I'm writing a simple little Lua commandline app that will build a static website. I'm storing my fragments in a sqlite database. Retrieving the data from the db is straightforward as is saving it; my question comes from editing the data. Is there an elegant way to pipe the data from Lua to vim? Can vim edit a memory buffer and return it? I was planning on launching the editor via os.execute('vim') but only after grabbing a temporary file handle and dumping the database output into that. I would like to have to avoid touching the filesystem that way but that is my contingency plan.

    Read the article

  • Handling Java stdout and stderr in Perl

    - by syker
    I am trying to run a Java program from my Perl script. I would like to avoid using System.exit(1) and System.exit(-1) commands in Java. I am however printing to STDOUT and STDERR from Java. In my Perl script, I am reading from Java's stdout and using that line by line output. How do I print stderr and fail if I ever see stderr? This is what I have so far: my $java_command = ...; open(DATA, ">$java_command"); while (<DATA>) { chomp($_); .... .... }

    Read the article

  • How do I use Zend Cache on this particular problem

    - by davykiash
    I have an action that renders two different view scripts based on whether the user is logged in or not. class IndexController extends Zend_Controller_Action { .... public function indexAction() { $auth = Zend_Auth::getInstance(); if($auth->hasIdentity()) { $this->render('indexregistered'); return; } else { $this->render('indexpublic'); return; } } .... } I have seen quite some useful examples on how to use the Zend Cache and they seem to be based on the fact that the action renders one particular script. What am really looking at is the best approach to cache the the indexpublic script does get quite some hits and I would live to avoid the Zend MVC overhead if possible.

    Read the article

  • Automatically deleting pyc files when corresponding py is moved (Mercurial)

    - by Oddthinking
    (I foresaw this problem might happen 3 months ago, and was told to be diligent to avoid it. Yesterday, I was bitten by it, hard, and now that it has cost me real money, I am keen to fix it.) If I move one of my Python source files into another directory, I need to remember to tell Mercurial that it moved (hg move). When I deploy the new software to my server with Mercurial, it carefully deletes the old Python file and creates it in the new directory. However, Mercurial is unaware of the pyc file in the same directory, and leaves it behind. The old pyc is used preferentially over new python file by other modules in the same directory. What ensues is NOT hilarity. How can I persuade Mercurial to automatically delete my old pyc file when I move the python file? Is there another better practice? Trying to remember to delete the pyc file from all the Mercurial repositories isn't working.

    Read the article

  • Saving gzipped string into Sqlite3 via Rails throws unrecognized token error

    - by user141146
    Hi, I'm using rails 2.3 and I'm trying to compress (gzip) text that I'd like to save using ActiveRecord into a sqlite database. However, the compressed text isn't being saved b/c I get this type of error: SQLite3::SQLException: unrecognized token: "'x##U?#7 Any thoughts on what I can do to avoid this error? should I compress the text in some other fashion? should I save the data using some other method(s)? Relevant code is below. # compress my text require 'zlib' defl = Zlib::Deflate test_string = "<h3>some text</h3>some additional text<p>here's some more text</p>" compressed_string = defl.deflate(test_string) => "x\234\263\3110\266+\316\317MU(I\255(\261\321\207\361\022SR2K2\363\363\022s \022\005v\031\251E\251\352\305\n`\331\334\374\"\230\206\002;\000\0225\027\222" ModelClass.new(:attribute1 => compressed_string).save ActiveRecord::StatementInvalid: SQLite3::SQLException: unrecognized token: "'x#####+##MU(I#(#?####2K2#### v#E####

    Read the article

  • DBnull in Linq query causing problems

    - by nat
    hi there i am doing a query thus: int numberInInterval = (from dsStatistics.J2RespondentRow item in jStats.J2Respondent where item.EndTime > dtIntervalLower && item.EndTime <= dtIntervalUpper select item).count(); there appear to be some dbnulls in the endtime column.. any way i can avoid these? tried adding && where item.endtime != null.. and even != dbnull.value do i have to do a second (first) query to grab all that arent null then run the above one? im sure its super simple fix, but im still missing it.. as per thanks nat

    Read the article

  • Explanation for expires header

    - by sushil bharwani
    I have a joomla application working on Apache.To improve site performace we have written a .htaccess file to root of the application with setting a far future expires header to all the static content. As desired first time the files load in fresh with 200 status code. when again click on the same link many of the files are served directly from cache. I need explanation for two things When i press f5 then a number of files load with 304 status code however i expected them to be coming directly from cache without hitting the server for a status header? When i close the browser and come back to the same page again i see the same thing happening a number of files load with 304 status code although i thought they will load directly from the browser cache? I understand that 304 also servs file from browser cache but i want to avoid the header communication between servers as my static files wont ever change. Also i want to add that my requests are over a https connection does that create any issue.

    Read the article

  • Optimize code performance when odd/even threads are doing different things in CUDA

    - by Orion Nebula
    Hi all! I have two large vectors, I am trying to do some sort of element multiplication, where an even-numbered element in the first vector is multiplied by the next odd-numbered element in the second vector .... and where the odd-numbered element in the first vector is multiplied by the preceding even-numbered element in the second vector Ex. vector 1 is V1(1) V1(2) V1(3) V1(4) vector 2 is V2(1) V2(2) V2(3) V2(4) V1(1) * V2(2) V1(3) * V2(4) V1(2) * V2(1) V1(4) * V2(3) I have written a Cuda code to do this: (Pds has the elements of the first vector in shared memory, Nds the second Vector) //instead of using %2 .. i check for the first bit to decide if number is odd/even -- faster if ((tx & 0x0001) == 0x0000) Nds[tx+1] = Pds[tx] * Nds[tx+1]; else Nds[tx-1] = Pds[tx] * Nds[tx-1]; __syncthreads(); Is there anyway to further accelerate this code or avoid divergence ? Thanks

    Read the article

  • Multiple levels of 'collection.defaultdict' in Python

    - by Morlock
    Thanks to some great folks on SO, I discovered the possibilities offered by collections.defaultdict, notably in readability and speed. I have put them to use with success. Now I would like to implement three levels of dictionaries, the two top ones being defaultdict and the lowest one being int. I don't find the appropriate way to do this. Here is my attempt: from collections import defaultdict d = defaultdict(defaultdict) a = [("key1", {"a1":22, "a2":33}), ("key2", {"a1":32, "a2":55}), ("key3", {"a1":43, "a2":44})] for i in a: d[i[0]] = i[1] Now this works, but the following, which is the desired behavior, doesn't: d["key4"]["a1"] + 1 I suspect that I should have declared somewhere that the second level defaultdict is of type int, but I didn't find where or how to do so. The reason I am using defaultdict in the first place is to avoid having to initialize the dictionary for each new key. Any more elegant suggestion? Thanks pythoneers!

    Read the article

  • Adding pdb files to VSS

    - by George
    Every time I try to compile my web app, I am prompted if i want to add pdb extensioned files to VSS. I thought pdb files do not belong in VSS see a previous post. Is there any way to prevent them from being added. I cannot even logically delete them from VSS because a previous version has been logically deleted and if I were to delete the current version, the previous version would have to be purged, for which I need vss admin rights that I do not have. I just can't get a handle on how to avoid getting a million files added to VSS that prevent otehr develoeprs from compiling their solutions because they have unchecked out read only copies. Is the only solution to check them in but flip the readonly flag off locally? This is not a good option in my mind.

    Read the article

  • Development deployment: how to achive edit-and-reload with JSP pages?

    - by doublep
    Out project uses WebLogic as web-server and uses mostly JSP for user interface. With standard setup it is possible to copy edited JSP files into the exploded deployment directory and WebLogic will automatically pick them up, recompile and serve new content through HTTP. However, is it possible to avoid copying at all, so that I just save a file in my editor and it is immediately (well, after a couple of seconds for recompilation) visible? The project uses Apache Ant as building tool. I would imagine what I want would be possible with symlinks (since this is for deployment only I don't care about cross-platformity), but then I don't see how it is possible to symlink lots of files at once with Ant. So, how do I achieve save-JSP-hit-F5-in-browser functionality either with some setting in WebLogic; or with symlinking JSPs using Apache Ant (instead of copying them as is done now); or something else completely?

    Read the article

  • MySql SELECT AS - Append all field names

    - by jeerose
    I'd like to do something like this: SELECT table.id AS prefix_id, table.name AS prefix_name ... and have the prefix added dynamically to all field names rather than selecting them all manually (ie SELECT table.* AS prefix_* or something) Hopefully I've described that accurately. Any thoughts? Edit To be clear, the reason I'm asking is to make sure that my query result contains every column from each table I call even if there are duplicate field names. For example, I might have a table with lots of fields which means I don't want to alias all the fields manually. Further if 3 tables have a field called name my result won't contain three name results; it will have one. I want to avoid ambiguity with my column names.

    Read the article

  • It's possible to don't pass in GET some fields of a form?

    - by avastreg
    I have a form with some input texts passed in GET, and i don't want to have in GET all the fields; i want to avoid empty fields. So, a concrete example for: <form method="GET" action="an_url"> <input type="text" name="field1"/> <input type="text" name="field2"/> <input type="text" name="field3"/> <input type="submit" value="submit"/> </form> I supposed that fields disabled by html attribute "disabled" shouldn't be passed to GET. So i have done a js (based on jquery) to disable empty fields on submit, something like this: $("form").submit(function() { $(this).find("input[type=text]").each( function () { if (!$.trim($(this).val())) { $(this).attr("disabled", "true"); } }); }); However, this doesn't work. Any ideas?

    Read the article

  • jQuery style Constructors in PHP

    - by McB
    Is there a way to instantiate a new PHP object in a similar manner to those in jQuery? I'm talking about assigning a variable number of arguments when creating the object. For example, I know I could do something like: ... //in my Class __contruct($name, $height, $eye_colour, $car, $password) { ... } $p1 = new person("bob", "5'9", "Blue", "toyota", "password"); But I'd like to set only some of them maybe. So something like: $p1 = new person({ name: "bob", eyes: "blue"}); Which is more along the lines of how it is done in jQuery and other frameworks. Is this built in to PHP? Is there a way to do it? Or a reason I should avoid it?

    Read the article

  • Python code formatting

    - by Curious2learn
    In response to another question of mine, someone suggested that I avoid long lines in the code and to use PEP-8 rules when writing Python code. One of the PEP-8 rules suggested avoiding lines which are longer than 80 characters. I changed a lot of my code to comply with this requirement without any problems. However, changing the following line in the manner shown below breaks the code. Any ideas why? Does it have to do with the fact that what follows return command has to be in a single line? The line longer that 80 characters: def __str__(self): return "Car Type \n"+"mpg: %.1f \n" % self.mpg + "hp: %.2f \n" %(self.hp) + "pc: %i \n" %self.pc + "unit cost: $%.2f \n" %(self.cost) + "price: $%.2f "%(self.price) The line changed by using Enter key and Spaces as necessary: def __str__(self): return "Car Type \n"+"mpg: %.1f \n" % self.mpg + "hp: %.2f \n" %(self.hp) + "pc: %i \n" %self.pc + "unit cost: $%.2f \n" %(self.cost) + "price: $%.2f "%(self.price)

    Read the article

  • Static Access To Multiple Instance Variable

    - by Qua
    I have a singleton instance that is referenced throughout the project which works like a charm. It saves me the trouble from having to pass around an instance of the object to every little class in the project. However, now I need to manage multiple instances of the previous setup, which means that the singleton pattern breaks since each instance would need it's own singleton instance. What options are there to still maintain static access to the singleton? To be more specific, we have our game engine and several components and plugins reference the engine through a static property. Now our server needs to host multiple game instances each having their own engine, which means that on the server side the singleton pattern breaks. I'm trying to avoid all the classes having the engine in the constructor.

    Read the article

  • Change an access Primary key with relationships

    - by DiegoMaK
    I have a database in access 2007 accdb extension , there are more or less 30-40 tables with related primary key "local_number". it is a text primary key with 10 lenght. How can I change the length of this primary key to 30 WITHOUT delete previosly all the 30 relationship. 2,A similar question. I need add a compose primary key to my PK "local_number". I need Add a "Date" as composed PK. Then access just allow this if I first delete all relationships. How can Avoid this warning and change my PK ignoring this message.

    Read the article

  • When is JavaScript's eval() not evil?

    - by Richard Turner
    I'm writing some JavaScript to parse user-entered functions (for spreadsheet-like functionality). Having parsed the formula I could convert it into JavaScript and run eval() on it to yield the result. However, I've always shied away from using eval() if I can avoid it because it's evil (and, rightly or wrongly, I've always thought it is even more evil in JavaScript because the code to be evaluated might be changed by the user). Obviously one has to use eval() to parse JSON (I presume that JS libraries use eval() for this somewhere, even if they run the JSON through a regex check first), but when else, other than when manipulating JSON, it is OK to use eval()?

    Read the article

  • Converting from SQL Server 2000 to 2005 for ASP.NET web App

    - by Bazza Formez
    Hi there, I'm moving my ASP.NET website to a new provider. Only problem is, old host support my SQL Server 2000 db. New host only supports SQL Server 2005. How should I go about the conversion ? Can I simply produce a backup of the 2000 (.bak) file at the old host, and restore that file into SQL Server 2005 at the new host ? Or is there more to it ?? Note that I don't own a copy of SQL Server 2005 at home... and I'm trying to avoid having to do so. Thanks, Bazza

    Read the article

  • ObjectDisposedException when outputting to console

    - by Sarah Vessels
    If I have the following code, I have no runtime or compilation problems: if (ConsoleAppBase.NORMAL_EXIT_CODE == code) { StdOut.WriteLine(msg); } else { StdErr.WriteLine(msg); } However, in trying to make this more concise, I switched to the following code: (ConsoleAppBase.NORMAL_EXIT_CODE == code ? StdOut : StdErr ).WriteLine(msg); When I have this code, I get the following exception at runtime: System.ObjectDisposedException: Cannot write to a closed TextWriter Can you explain why this happens? Can I avoid it and have more concise code like I wanted?

    Read the article

  • Struts2 dynamic form elements

    - by bozo
    Hi, I would like to create little higer-level framework on top of Stuts2 which can take form element description from Action and render a complete form, in order to avoid having a separate JSP files with hardcoded form elements for every form in a large web application (so if I manage to do this I will have just a few generic JSPs for data form and few for layout). Application is extremely data-driven. My idea is to create form description using custom objects in the Action (i.e. Button, TextInput etc.) and then to create a single JSP page that will render eveything out. What is the best way of doing this? Can you propose some concrete way to do this? I don't want to write something if I can reuse the existing code with some effort. Any ideas are appreciated. Kind regards, Bozo

    Read the article

< Previous Page | 167 168 169 170 171 172 173 174 175 176 177 178  | Next Page >