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  • Why doesn't list.get(0).equals(null) work?

    - by Jessy
    The first index is set to null (empty), but it doesn't print the right output, why? //set the first index as null and the rest as "High" String a []= {null,"High","High","High","High","High"}; //add array to arraylist ArrayList<Object> choice = new ArrayList<Object>(Arrays.asList(a)); for(int i=0; i<choice.size(); i++){ if(i==0){ if(choice.get(0).equals(null)) System.out.println("I am empty"); //it doesn't print this output } }

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  • How do Perl FIRSTKEY and NEXTKEY work

    - by mmccoo
    Tie::Hash has these: sub FIRSTKEY { my $a = scalar keys %{$_[0]}; each %{$_[0]} } sub NEXTKEY { each %{$_[0]} } NEXTKEY takes two arguments, one of which is the last key but that arg is never referenced? The various Tie docs don't shed any light on this other than this in perltie: my $a = keys %{$self->{LIST}}; # reset each() iterator looking at the doc for each doesn't add to this. What's going on?

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  • jquery anchor click doesn't seem to work....

    - by Pandiya Chendur
    Here is function , <script type="text/javascript"> $(document).ready(function() { getRecordspage(1, 5); $("a.page-numbers").click(function() { alert(1); getRecordspage($(this).text(), 5); return false; }); }); And in my page i am appending anchors dynamically to this div, <div id="pager" class="pager"> //my anchors will be present here... </div> i am appending anchors dynamically... All anchors will have class="page-numbers"... How it can be done... When inspected through firebug my pager div had this when i clicked 3, <div class="pager" id="pager"> <a class="page-numbers prev" href="#">Prev</a> <a class="page-numbers" href="#">1</a> <a class="page-numbers" href="#">2</a> <span class="page-numbers current">3</span> <a class="page-numbers" href="#">4</a> <a class="page-numbers next" href="#">Next</a></div>

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  • How Does Modulus Divison Work

    - by NSWOA
    I don't really understand how modulus division works. I was calculating 27 % 16 and wound up with 11 and I don't understand why. I can't seem to find an explanation in layman's terms online. Can someone elaborate on a very high level as to what's going on here? EDIT: Thanks for all your answers. You guys are incredibly quick. It all makes sense now.

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  • How do C++ header files work?

    - by PulpFiction
    Hi all. When I include some function from a header file in a C++ program, does the entire header file code get copied to the final executable or only the machine code for the specific function is generated. For example, if I call std::sort from the <algorithm> header in C++, is the machine code generated only for the sort() function or for the entire <algorithm> header file. I think that a similar question exists somewhere on Stack Overflow, but I have tried my best to find it (I glanced over it once, but lost the link). If you can point me to that, it would be wonderful.

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  • pygtk combobox 'changed' does not work

    - by joven
    I'm using pygtk then i used gtk.Combobox when i try to connect on chenged event its working but when i try to select an item that is already selected the changed method does not triggered since the selection does not changed.. so my question is how to connect the changed event even thought the selection does not changed tnx in advance

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  • PHP : apc_store doesn't work as intended

    - by Industrial
    Hi everyone, I have started to try APC to store some specific data on each webserver as an complement to memcached. However, the following code piece is giving me headaches: echo apc_store('key', 'value'); echo apc_store('key', 'newvalue'); echo apc_fetch('key'); Result: value Why is apc_store not working as properly?

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  • Why doesn't these links work in IE7 ?

    - by Patrick
    hi, I don't understand why I cannot click the tags on top in IE7 on this website: http://www.sanstitre.ch/drupal/portfolio?tid[0]=38http://www.sanstitre.ch/drupal/portfolio?tid[0]=38 It says javascript error but I debugged with Firefox and I don't get any error... Could you give me some help ?

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  • Problem with .htaccess (mod_rewrite). RewriteRule's doens't work correctly

    - by daniel
    Hello, I have a problem with my two RewriteRules. .htaccess: # protect the htaccess file <files .htaccess> order allow,deny deny from all </files> RewriteEngine On Options +FollowSymlinks Options -Indexes RewriteBase /test/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^download/([0-9]+)$ download.php?id=$1 [L] RewriteRule ^(.*)$ index.php?c=view&misc=$1 [B] If the url contains download (some like this: mydomain.com/download/9) the first rule should redict this request to download.php?id=9. But it doesn't. var_dump($_GET) shows the following: array(2) { ["c"]=> string(4) "view" ["misc"]=> string(9) "index.php" } index.php Any ideas?

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  • Message box does not work in release mode

    - by Bi
    I have the following code in a C# windows form application. if (myGrid.Rows.Count != 0) { // do something } else { MessageBox.Show("Test"); } The message box shows up in Debug mode but not in release mode. Any idea why? I am having similar issues with other code as well For instance if (!myParameter) this.mycheckBox.Enabled = false; else this.mycheckBox.Enabled = true; The above code works in debug mode not in release. Not sure why. Thanks

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  • why include() don't allow to work setcookie?

    - by Syom
    i need to set cookies in my page, but it returns Warning: Cannot modify header information - headers already sent by (output started at /home1/bsam/public_html/24kadr/index.php:1) in /home1/bsam/public_html/24kadr/basic_login.php on line 35 on line 1 i have include 'basic_login.php'; but even if i remoove include, ir returns the same warning on session_start, or mysql_connect. so i think these all functions use header when calling, but what can i do? at least i need to connect to database, and just after it i need to use setcookie(). so what can i do? thanks

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  • Custom route does not work in ASP.net MVC 3

    - by user603007
    I am trying to implement my custom route in ASP.net MVC 3 but I get this error: The resource cannot be found. global.asax public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( "mycontroller", // Route name "{controller}/{name}", // URL with parameters new { controller = "MyController", action = "Search" } // Parameter defaults ); } MyController.cs public class MyController : Controller { public ActionResult Search(string name) { return Content(name); } }

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  • Java Collections.Rotate with an array doesn't work

    - by steve_72
    I have the following java code: import java.util.Arrays; import java.util.Collections; public class Test { public static void main(String[] args) { int[] test = {1,2,3,4,5}; Collections.rotate(Arrays.asList(test), -1); for(int i = 0; i < test.length; i++) { System.out.println(test[i]); } } } I want the array to be rotated, but the output I get is 1 2 3 4 5 Why is this? And is there an alternative solution?

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  • Why did this code still work?

    - by bstullkid
    Some old code that I just came across: MLIST * new_mlist_link() { MLIST *new_link = (MLIST * ) malloc(sizeof(MLIST)); new_link->next = NULL; new_link->mapi = NULL; new_link->result = 0; } This was being called to build a linked list, however I noticed there is no statement: return new_link; Even without the return statement there, the list still got built properly. Why did this happen? EDT: Platform: Mandriva 2009 64bit Linux 2.6.24.7-server GCC 4.2.3-6mnb1

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  • mod_rewrite - Don't get a second rule work

    - by poru
    I want to have a url like this: domain.com/css/site.css?test=234 Rule: RewriteEngine On RewriteRule ^([a-z]+)/$ $1.php RewriteRule ^css/([a-zA-Z0-9]+).css?count=(.*)$ css.php?f=$1&test=$2 But I get every time a 404: Not found (site.css) If I have a rule like that it works, just without getting the $_GET-Variable: RewriteEngine On RewriteRule ^([a-z]+)/$ $1.php RewriteRule ^css/([a-zA-Z0-9]+).css$ css.php?f=$1

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  • onclick from an Object's button doesn't work

    - by 730
    I instantiate an object, with an argument which is a button. When the button of an instance is clicked, it should run a function, but it doesn't. In the full version of the code, Chrome gives this message in the console: "Uncaught TypeError: Cannot read property 'onclick' of undefined" HTML: <textarea id='txt' readonly rows='5' cols='40'></textarea> <button id='btn' type='button'>click</button> JS: var btn = document.getElementById('btn'); var txt = document.getElementById('txt'); var foo = new Foo(btn); function Foo(btn) { this.button = btn; } Foo.prototype.buy = function() { txt.value = 'Foo Bar'; }; Foo.button.onclick = function() { foo.buy(); }; Fiddle

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  • Why this kind of release doesn't work?

    - by parkyprg
    Hello, I have a newbie question about the following: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSArray *anArray; anArray = [dictionary objectForKey: [NSString stringWithFormat:@"%d", section]]; //here dictionary is of type NSDictionary, initialized in another place. AnObject *obj = [[AnObject alloc] init]; obj = [anArray objectAtIndex:0]; [anArray release]; return obj.title; } If I run it as it is I will get an error. If I don't put [anArray release] it works just fine. I don't quite understand why is this happening? Thanks.

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  • removeClass doesn't work on the second DIV tag

    - by kwokwai
    Hi all, I am learning JQuery and writing a simple data validation for the two fields in a HTML form: <FORM name="addpost" id="addpost" method="post" action="/add"> <TABLE BORDER=0 width="100%"> <TR> <TD>Topic</TD> <TD> <DIV ID="topic"> <INPUT type=text name="topic" id="topic" size="72" maxlength="108"/> </DIV> </TD> </TR> <TR> <TD>Comments</TD> <TD> <DIV ID="topiccontent"> <TEXTAREA rows="12" cols="48" name="content" ID="content"> </TEXTAREA> </DIV> </TD> </TR> <TR> <TD> <INPUT type="submit" value="Send"> </TD> </TR> </TABLE> </FORM> Here is the JQuery script for checking the data input from the form above: $('#addpost').submit(function(){ if($('#topic').val()==""){ $('#topic').addClass('hierror'); return false;} else{$('#topic').removeClass('hierror');} if($('#topiccontent').val()==""){ $('#topiccontent').addClass('hierror'); return false;} else{$('#topiccontent').removeClass('hierror');} }); Here is the CSS for the hierror class: .hierror{border-style:solid; border-width:12px; border-color:#FF0000;} ('#topic').removeClass('hierror') works but ('#topiccontent').removeClass('hierror') doesn't. Could you help me please?

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  • How is does this module code work?

    - by phsr
    I'm new to ruby and I am trying to figure out how the following code works The following code is inside a class in a module. The method is called later with the following code: @something ||= Module::Class.config class << self def config &block options = OpenStruct.new yield options if block_given? init_client! Client.new(options) end def init_client!(client) base_eigenclass = class << Base; self; end base_eigenclass.send :define_method, :client do @client = client end client end end The class has some constants in it, and when the classes initialize is called, the instance member are set to option.variable || VARIABLE_CONSTANT. I understand that if there is no value for option.variable then VARIABLE_CONSTANT is used, but I don't understand that calling Module::Class.config do |options| #some block end set the @client until config is called again with options The code definitely works, but I want to understand how it does

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  • html5media library doesn't work on FF 3.6.3

    - by Alex
    Hi. Am I the only one experiencing this issue? I'm using the html5media library and the test page they provide no longer plays in Firefox 3.6.3, though it plays on the latest Safari, Chrome, Opera, and IE. On FF 3.6.3, it shows the video and the audio with large X through them. I'm using this library on my site and noticed the issue as well. I'm not seeing any errors in the error console.

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  • C or C++: how do loaders/wrappers work?

    - by guitar-
    Here's an example of what I mean... User runs LOADER.EXE program LOADER.EXE downloads another EXE but keeps it all in memory without saving it to disk Runs the downloaded EXE just as it would if it were executed from disk, but does it straight from memory I've seen a few applications like this, and I've never seen an example or an explanation of how it works. Does anyone know? Another example is having an encrypted EXE embedded in another one. It gets extracted and decrypted in memory, without ever being saved to disk before it gets executed. I've seen that one used in some applications to prevent piracy.

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