Search Results

Search found 39456 results on 1579 pages for 'why do you'.

Page 127/1579 | < Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134  | Next Page >

  • Why are references compacted inside Perl lists?

    - by parkan
    Putting a precompiled regex inside two different hashes referenced in a list: my @list = (); my $regex = qr/ABC/; push @list, { 'one' => $regex }; push @list, { 'two' => $regex }; use Data::Dumper; print Dumper(\@list); I'd expect: $VAR1 = [ { 'one' => qr/(?-xism:ABC)/ }, { 'two' => qr/(?-xism:ABC)/ } ]; But instead we get a circular reference: $VAR1 = [ { 'one' => qr/(?-xism:ABC)/ }, { 'two' => $VAR1->[0]{'one'} } ]; This will happen with indefinitely nested hash references and shallowly copied $regex. I'm assuming the basic reason is that precompiled regexes are actually references, and references inside the same list structure are compacted as an optimization (\$scalar behaves the same way). I don't entirely see the utility of doing this (presumably a reference to a reference has the same memory footprint), but maybe there's a reason based on the internal representation Is this the correct behavior? Can I stop it from happening? Aside from probably making GC more difficult, these circular structures create pretty serious headaches. For example, iterating over a list of queries that may sometimes contain the same regular expression will crash the MongoDB driver with a nasty segfault (see https://rt.cpan.org/Public/Bug/Display.html?id=58500)

    Read the article

  • Why Constant Keyword is not introduced In Java?

    - by harigm
    I am curious learner of Java, I was thinking on one topic "CONSTANTS" I have learnt that Java allows us to declare constants by using "Final" keyword. My question is Java didnot introduce Constant(Const) Keyword. Since many people say it has come from C++, in C++ we have Const keyword Is there any strong reason behind, Please share your thoughts on this.

    Read the article

  • why those chinese indent code so differently?

    - by winston
    currently i am working with some programmer from shanghai i notice they have some coding indentation like these: if(1==1 && 2==2) { a = 3; } else { b = 4; } however i am accustomed to: if (1==1 && 2==2) { a = 3; } else { b = 4; } what do you think? how could i get rid of different coding styles within a single program file?

    Read the article

  • msysGit: Why does git log output blank lines?

    - by Sam
    It appears to insert less blank lines the closer I type the command to the bottom of the terminal window. If I type it at the top of the terminal window, it inserts nearly a full window height of blank lines; if I type it at the very bottom, no blank lines are inserted. It seems like the pager program is pushing output to the bottom of the terminal window, but I want the output to be right below my command or at the top, like in Linux git. I can get expected behavior by using git --no-pager log, but what if I want to use a pager?

    Read the article

  • Why do not C++11's move constructor/assignment operator act as expected

    - by xmllmx
    #include <iostream> using namespace std; struct A { A() { cout << "A()" << endl; } ~A() { cout << "~A()" << endl; } A(A&&) { cout << "A(A&&)" << endl; } A& operator =(A&&) { cout << "A& operator =(A&&)" << endl; return *this; } }; struct B { // According to the C++11, the move ctor/assignment operator // should be implicitly declared and defined. The move ctor // /assignment operator should implicitly call class A's move // ctor/assignment operator to move member a. A a; }; B f() { B b; // The compiler knows b is a temporary object, so implicitly // defined move ctor/assignment operator of class B should be // called here. Which will cause A's move ctor is called. return b; } int main() { f(); return 0; } My expected output should be: A() A(A&&) ~A() ~A() However, the actual output is: (The C++ compiler is: Visual Studio 2012) A() ~A() ~A() Is this a bug of VC++? or just my misunderstanding?

    Read the article

  • Why doesn't this code work correctly?

    - by MisterSir
    I'm working on a website that displays galleries, using jCarousel. But no matter what I try, I can't get it to work, and I need to finish this by today. I have a very urgent schedule. My code basically takes image URLs from a database and sends them to AJAX, which passes it to jCarousel which makes the gallery. But there are a few problems: It doesn't display correctly! I can only get the last item pulled from the database, and it displays on the bottom-most row. After the item pulled from the database is displayed, the first time I click on "prev" there's no scroll effect, and the item just disappears! Only if I click on "next" 2-3 times there's a scroll effect and the item remains visible. My items are always displayed at the end of the carousel! This is urgent.. Please help me fix this. about.html: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-us"> <head> <script type="text/javascript" src="jquery-1.4.4.min.js"></script> <script type="text/javascript" src="/lib/jquery.jcarousel.min.js"></script> <link rel="stylesheet" type="text/css" href="/skins/tango/skin.css" /> <!--<style type="text/css"> #wrapper { width: 700px; margin-left: auto; margin-right: auto; } #carousel { margin-top: 120px; padding-left: 120px; } #side { padding-left: 550px; position: absolute; padding-top: 120px; } #hidden { color: #FFFFFF; } </style>--> <script type="text/javascript"> jQuery.easing['BounceEaseOut'] = function(p, t, b, c, d) { if ((t/=d) < (1/2.75)) { return c*(7.5625*t*t) + b; } else if (t < (2/2.75)) { return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b; } else if (t < (2.5/2.75)) { return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b; } else { return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b; } }; function mycarousel_initCallback(carousel) { jQuery('#mycarousel-next').bind('click', function() { carousel.next(); return false; }); jQuery('#mycarousel-prev').bind('click', function() { carousel.prev(); return false; }); }; jQuery(document).ready(function() { jQuery('#mycarousel').jcarousel({ easing: 'BounceEaseOut', wrap: "first", initCallback: mycarousel_initCallback, animation: 1000, scroll: 3, visible: 3, buttonNextHTML: null, buttonPrevHTML: null }); jQuery('#mycarousel2').jcarousel({ easing: 'BounceEaseOut', animation: 1000, wrap: "first", initCallback: mycarousel_initCallback, scroll: 3, visible: 3, buttonNextHTML: null, buttonPrevHTML: null }); jQuery('#mycarousel3').jcarousel({ easing: 'BounceEaseOut', animation: 1000, scroll: 3, wrap: "first", initCallback: mycarousel_initCallback, visible: 3, buttonNextHTML: null, buttonPrevHTML: null }); }); var prevButton = null; function getObject(b, el) { var currbutton = b; var http; var url = "about.php"; var parameters = "d=carousel&cat=" + currbutton; try { http = new XMLHttpRequest(); } catch(e) { try { http = new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) { http = new ActiveXObject("Microsoft.XMLHTTP"); } } function getServer() { if (http.readyState == 4) { var i = 0; var liArr = http.responseText; var built = liArr.split(", "); var li = document.createElement("li"); var ul1 = document.getElementById("mycarousel"); var ul2 = document.getElementById("mycarousel2"); var ul3 = document.getElementById("mycarousel3"); if (el != prevButton) { prevButton = el; while (ul1.hasChildNodes() ) {ul1.removeChild(ul1.lastChild);} while (ul2.hasChildNodes() ) {ul2.removeChild(ul2.lastChild);} while (ul3.hasChildNodes() ) {ul3.removeChild(ul3.lastChild);} } else return 0; while (i < (built.length) / 3) { li.innerHTML = built[i]; ul1.appendChild(li); i++; } while (i < ((built.length) / 3)*2) { li.innerHTML = built[i]; ul2.appendChild(li); i++; } while (i < (built.length)) { li.innerHTML = built[i]; ul3.appendChild(li); i++; } } } http.open("POST", url, true); http.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); http.setRequestHeader("Content-length", parameters.length); http.setRequestHeader("Connection", "close"); http.onreadystatechange = getServer; http.send(parameters); } </script> </head> <body> <span id="hidden"> </span> <div id="wrapper"> <div id="side"> <form name="cats"> <input type="button" value="Hats" onclick="getObject('hats', this);"/><br /> <input type="button" value="Pants" onclick="getObject('pants', this);"/><br /> <input type="button" value="Shirts" onclick="getObject('shirts', this);"/><br /> </form> </div> <div id="carousel"> <ul id="mycarousel" class="jcarousel-skin-tango"> </ul> <ul id="mycarousel2" class="jcarousel-skin-tango"> </ul> <ul id="mycarousel3" class="jcarousel-skin-tango"> </ul> <input type="button" id="mycarousel-prev" value="prev" /> <input type="button" id="mycarousel-next" value="next" /> </div> </div> </body> </html> I commented the CSS because I thought it was giving me trouble, but honestly I have no idea what the hell's going on with jCarousel. about.php: <?php echo "<img width='75' height='75' src='http://static.flickr.com/66/199481236_dc98b5abb3_s.jpg' />, hi, hi, hi, hi, hi, hi, hi, hi"; ?> Also, even if there are no other items than what is displayed, I'm still able to scroll back, but not forward, assumingly because my item is always placed at the end of the carousel. I know it looks like a lot of code but it's really not! My formatting takes a lot of lines, the commented CSS takes a lot, and a lot of the code is HTML and jCarousel configuration, and there's also the BounceEasing effect which takes a few lines. There's not much actual code! So as I said, this is urgent and I need this fixed. But I can't get it to work. Please help me! Thanks for your time! EDIT: I changed the code a bit, but it still does not work. I really need help on this one!! EDIT: I added document.createElement("li"); to each while loop. Now all my items are displayed, but they are displayed vertically and not horizontally on each row. Other than that all other problems are the same. EDIT: Oh and also, in the row my image displays, only the image is there. Maybe jCarousel doesn't accept img and text, I don't know.

    Read the article

  • Why does my .NET 4 application know .NET 4 is not installed

    - by Tergiver
    I developed an application that targeted .NET 4 the other day and XCOPY-installed it to a Windows XP machine. I had told the owner of the machine that they would need to install .NET Framework 4 to run my app and he told me he did (not a reliable source). When I ran the application I was presented with a message box that said this app requires .NET Framework 4, would I like to install it? Clicking the Yes button took me to the Microsoft web site and a few clicks later .NET 4 was installed, and the application successfully launched. Now I normally don't develop applications that target the latest version of .NET, I always target the lowest version I can (what features do I really need?). So this was my first .NET 4 app (and I only targeted 4 because it used a library that did). In the past, XCOPY-installing .NET applications to a machine that didn't have the correct version of .NET installed resulted in the application simply crashing on startup with no useful information presented to the user. Was it built into my app because I targeted .NET X? Was it something already installed on the target machine? I love the feature, I just want to know precisely how to leverage it in the future.

    Read the article

  • Why doesn't this UIButton show its text label?

    - by Dan Ray
    Everything about this UIButton renders great except the text that's supposed to be on it. NSLog demonstrates that the text is in the right place. What gives? UIButton *newTagButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [newTagButton addTarget:self action:@selector(showNewTagField) forControlEvents:UIControlEventTouchUpInside]; newTagButton.titleLabel.text = @"+ New Tag"; NSLog(@"Just set button label to %@", newTagButton.titleLabel.text); newTagButton.titleLabel.font = [UIFont systemFontOfSize:17]; newTagButton.titleLabel.textColor = [UIColor redColor]; CGSize addtextsize = [newTagButton.titleLabel.text sizeWithFont:[UIFont systemFontOfSize:17]]; CGSize buttonsize = { (addtextsize.width + 20), (addtextsize.height * 1.2) }; newTagButton.frame = CGRectMake(x, y, buttonsize.width, buttonsize.height); [self.mainView addSubview:newTagButton];

    Read the article

  • Why MSMQ won't send a space character?

    - by cyclotis04
    I'm exploring MSMQ services, and I wrote a simple console client-server application that sends each of the client's keystrokes to the server. Whenever hit a control character (DEL, ESC, INS, etc) the server understandably throws an error. However, whenever I type a space character, the server receives the packet but doesn't throw an error and doesn't display the space. Server: namespace QIM { class Program { const string QUEUE = @".\Private$\qim"; static MessageQueue _mq; static readonly object _mqLock = new object(); static XmlSerializer xs; static void Main(string[] args) { lock (_mqLock) { if (!MessageQueue.Exists(QUEUE)) _mq = MessageQueue.Create(QUEUE); else _mq = new MessageQueue(QUEUE); } xs = new XmlSerializer(typeof(string)); _mq.BeginReceive(new TimeSpan(0, 1, 0), new object(), OnReceive); while (Console.ReadKey().Key != ConsoleKey.Escape) { } } static void OnReceive(IAsyncResult result) { Message msg; lock (_mqLock) { try { msg = _mq.EndReceive(result); Console.Write("."); Console.Write(xs.Deserialize(msg.BodyStream)); } catch (Exception ex) { Console.Write(ex); } } _mq.BeginReceive(new TimeSpan(0, 1, 0), new object(), OnReceive); } } } Client: namespace QIM_Client { class Program { const string QUEUE = @".\Private$\qim"; static MessageQueue _mq; static void Main(string[] args) { if (!MessageQueue.Exists(QUEUE)) _mq = MessageQueue.Create(QUEUE); else _mq = new MessageQueue(QUEUE); ConsoleKeyInfo key = new ConsoleKeyInfo(); while (key.Key != ConsoleKey.Escape) { key = Console.ReadKey(); _mq.Send(key.KeyChar.ToString()); } } } } Client Input: Testing, Testing... Server Output: .T.e.s.t.i.n.g.,..T.e.s.t.i.n.g...... You'll notice that the space character sends a message, but the character isn't displayed.

    Read the article

  • Java UnknownHostException When and Why?

    - by interstar
    I'm trying to post to a website from a Processing Sketch. (Processing is basically Java running in a fancy environment). I'm using this library : http://libraries.seltar.org/postToWeb/ but I don't know if that makes a difference. You can see from the stack trace below that this is just a wrapper for the Java standard library. Anyway, the important point is that the host "mysite.com" is up and running. I am seeing it from the browser. But when I try to post to it from Java I just get the UnknownHostException appearing. Given that the site is up. What else might this mean? The program is currently running inside the Processing environment. Presumably as an Applet. java.net.UnknownHostException: mysite.com at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at java.net.Socket.connect(Socket.java:478) at sun.net.NetworkClient.doConnect(NetworkClient.java:163) at sun.net.www.http.HttpClient.openServer(HttpClient.java:394) at sun.net.www.http.HttpClient.openServer(HttpClient.java:529) at sun.net.www.http.HttpClient.<init>(HttpClient.java:233) at sun.net.www.http.HttpClient.New(HttpClient.java:306) at sun.net.www.http.HttpClient.New(HttpClient.java:323) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1014) at org.seltar.Bytes2Web.PostToWeb._post(PostToWeb.java:90) at org.seltar.Bytes2Web.ByteToWeb.post(ByteToWeb.java:66) at experimentPostToWeb.keyPressed(experimentPostToWeb.java:35) at processing.core.PApplet.handleKeyEvent(Unknown Source) at processing.core.PApplet.dequeueKeyEvents(Unknown Source) at processing.core.PApplet.handleDraw(Unknown Source) at processing.core.PApplet.run(Unknown Source) at java.lang.Thread.run(Thread.java:662)

    Read the article

  • Why is ARG_MAX not defined via limits.h?

    - by Josh Matthews
    On Fedora Core 7, I'm writing some code that relies on ARG_MAX. However, even if I #include <limits.h>, the constant is still not defined. My investigations show that it's present in <sys/linux/limits.h>, but this is supposed to be portable across Win32/Mac/Linux, so directly including it isn't an option. What's going on here?

    Read the article

  • Why is this HTTP request continually looping?

    - by alex
    I'm probably overlooking something really obvious here. Comments are in to help explain any library specific code. public function areCookiesEnabled() { $random = 'cx67ds'; // set cookie cookie::set('test_cookie', $random); // try and get cookie, if not set to false $testCookie = cookie::get('test_cookie', false); $cookiesAppend = '?cookies=false'; // were we able to get the cookie equal ? $cookiesEnabled = ($testCookie === $random); // if $_GET['cookies'] === false , etc try and remove $_GET portion if ($this->input->get('cookies', false) === 'false' AND $cookiesEnabled) { url::redirect(str_replace($cookiesAppend, '', url::current())); // redirect return false; } // all else fails, add a $_GET[] if ( ! $cookiesEnabled) { url::redirect(url::current().$cookiesAppend); } return $cookiesEnabled; }

    Read the article

  • Why the output is not same ??

    - by javatechi
    public class swapex{ public static int var1, var2; public void badSwap(int var1, int var2){ int temp = var1; this.var1 = var2; this.var2 = temp; System.out.println("var1 " + var1 + " var2 "+ var2); } public static void main(String args[]) { swapex sw= new swapex(); sw.badSwap(10,20); System.out.println("var1 " + var1 + " var2 "+ var2); } }

    Read the article

  • Why no ArgumentEmptyException in .NET ?

    - by Andrei Rinea
    I am beginning to think I am doing something wrong. I mean they did place System.String.IsNullOrWhitespace finally but no ArgumentEmptyException class. public FilterItem(string name, IEnumerable<string> extensions) { if (string.IsNullOrWhiteSpace(name)) { throw new ArgumentNullException("name"); } if (extensions == null) { throw new ArgumentNullException("extensions"); } if (extensions.Count() == 0) { throw new ArgumentOutOfRangeException("extensions"); } this.Name = name; this.Extensions = extensions; } throwing an ArgumentOutOfRangeException feels unnatural. Also an instance of ArgumentException is too general in my opinion. It's easy to me to create a new exception class call it this way and have it over with. What bugs me is that it's not in the BCL/FCL and I am beginning to think there's a good reason not to have it. Should there be one?

    Read the article

  • Why does addSubview load the view asynchronously

    - by moshe
    I have a UIView that I want to load when the user clicks a button. There happens to be some data processing that happens as well after I call addSubview that involves parsing an XML file retrieved from the web. The problem is the view doesn't show up until after the data processing even if addSuview is called first. I think I'm missing something here, can anyone help? Code: I have a "Loading..." view I'm adding as a custom modal (meaning I'm not using the modalViewController). This action is linked to a button in the navigationController. - (IBAction)parseXml:(id)sender { LoadingModalViewController *loadingModal = [[LoadingModalViewController alloc] initWithNibName:@"LoadingModalViewController" bundle:nil]; [navigationController.view addSubview:loadingModal.view]; [xmlParser parse]; }

    Read the article

  • Why aren't arrays expandable?

    - by Mustafa
    When we create an array, we cannot change its size; it's fixed. OK, seems nice, we can create a new bigger array and copy the values one by one and that's little slow. What's the technical background of it?

    Read the article

  • Why does DataInputStream not support integers?

    - by Jason
    I need to read in a list of numbers from a file, none of which are larger than 32767. Originally I was going to use the Scanner class to pull in the data, then I read about DataInputStream. This would work well for me, except that according to the API, it supports all primitive variables EXCEPT ints! Listed are longs, shorts, bytes, chars, booleans, ect, but no ints. I have no need for double precision from the incoming data. Is this a deliberate or unintentional oversight?

    Read the article

  • why the output of ls is like this

    - by dorelal
    I am using snow leopard and this is what I get in my terminal. By default I am using bash. > ls c* clock: PSD demo.html jquery.tzineClock script.js styles.css clock2: clojure-presentations: Clojure-1up.pdf ClojureInTheField-1up.pdf license.html Clojure-4up.pdf README ClojureForRubyists-1up.pdf keynote coffee-script: Cakefile README bin examples index.html package.json test LICENSE Rakefile documentation extras lib src vendor

    Read the article

  • Why many "normal" string in my flashlog file

    - by randy
    I suddenly find that there are many "normal" trace in my file flashlog.txt (supposed at your Window's location:{SysDrive}:\Documents and Settings{yourName}\Application Data\Macromedia\Flash Player\Logs). normal normal normal normal normal normal 1/10/2011 15:32:13.008 [INFO] org.spicefactory.parsley.core.view.impl.DefaultViewManager Add view root: null/flash.display::Stage normal normal normal But when I run the application with the FlashBuilder, the logging in the consul page is ok, it doesn't include any "normal" String. I am very confused by this, I thought that the output of the flashlog.txt file should be the same as that of the consul of FlashBuilder.And I don't think I have added such a stupid trace in my code. The question is how can I find out where these "normal" trace come from and how to remove it. This problem is resolved by restarting the computer as suggested.

    Read the article

  • Why PHPUnit test doesn't fail?

    - by JohnM2
    I have a test method which looks like that: $row = $this->GetRowFromUserTable($id); $this->asserLessThan(time(), time($row['last_update'])); When $row is null access to $row['last_update'] should trigger a NOTICE and this test should fail, but it doesn't. This code fails on first assert, so I know $db_row is null (fixture is the same): $row = $this->GetRowFromUserTable($id); $this->asserNotNull($row); $this->asserLessThan(time(), time($row['last_update'])); When I write this: $row = $this->GetRowFromUserTable($id); $this->assertEquals(E_ALL, error_reporting()); $this->asserLessThan(time(), time($row['last_update'])); it successes, so I am also sure that error_reproting is right and this situation must have something to do with PHPUnit. I use PHPUnit 3.5.6 I read this question: Can I make PHPUnit fail if the code throws a notice? but the answer suggests to use newer version of PHPUnit, but that answer is from 2009, so it's not it. EDIT: I use NetBeans IDE 6.9.1 to run my test.

    Read the article

  • Why my buttons OnClick event fails to fire?

    - by Pentium10
    I have an activity, where the ListView holds customized linear layout elements for each row. One of the rows has a button defined as: <Button android:text="Pick a contact" android:id="@+id/btnPickContact" android:layout_width="wrap_content" android:gravity="center_vertical" android:layout_height="wrap_content"></Button> Then in java, I have this code: ((Button) row.findViewById(R.id.btnPickContact)).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI); intent.putExtra(EXTRA_ONLINE_ID, (String)v.getTag(TAG_ONLINE_ID)); act.startActivityForResult(intent, PICK_CONTACT); } }); In this setup the event fails to start. Also I've tried by implementing the interface: @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI); intent.putExtra(EXTRA_ONLINE_ID, (String)v.getTag(TAG_ONLINE_ID)); startActivityForResult(intent, PICK_CONTACT); } still no luck, the event doesn't fire. What to do?

    Read the article

< Previous Page | 123 124 125 126 127 128 129 130 131 132 133 134  | Next Page >