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• What data is actually stored in a B-tree database in CouchDB?

  - by Andrey Vlasovskikh

  I'm wondering what is actually stored in a CouchDB database B-tree? The CouchDB: The Definitive Guide tells that a database B-tree is used for append-only operations and that a database is stored in a single B-tree (besides per-view B-trees). So I guess the data items that are appended to the database file are revisions of documents, not the whole documents: +---------|### ... | | +------|###|------+ ... ---+ | | | | +------+ +------+ +------+ +------+ | doc1 | | doc2 | | doc1 | ... | doc1 | | rev1 | | rev1 | | rev2 | | rev7 | +------+ +------+ +------+ +------+ Is it true? If it is true, then how the current revision of a document is determined based on such a B-tree? Doesn't it mean, that CouchDB needs a separate "view" database for indexing current revisions of documents to preserve O(log n) access? Wouldn't it lead to race conditions while building such an index? (as far as I know, CouchDB uses no write locks).

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• jquery calling a function

  - by jay

  Hi, yet again thanks for looking. i like to call a function (eg. comment_disp, post_disp or any other i create later on). i have created a json function with url, fname and id can i use fname as a function name? // on document ready runs json('comments.php','comment_disp'); url = url to get fname = function name id = post or any other data id. json = function(url,fname,id){ $.getJSON(url,(fname)); } comment_disp = function(json){ }

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• jQuery selector question

  - by Jakey

  I have a span and an anchor inside a table cell. I have the anchor set up to show a tooltip. I would like the text inside the span to be used for the tooltip. How can I select this text in jQuery? <td class="row-head" colspan="5"><span class="tip-text">Complete Coverage</span><a href="#" class="help"></a></td> JQuery code - the current selector always finds the first instance only for all tips. $(document).ready(function() { $('.help').qtip({ style: { name: 'cream', tip: true }, content: { text: $(this).find('span.tip-text').html() } }); }); Thanks

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• windows popup close before display dos . xls

  - by Edgar Trejo

  Good morning! I'm trying to display a document. Xls in a popup window on IE8 but before showing the window closes automatically. Here I show the code javascript: function hacerExportarExcel(){ var url = contextPath + "/exportarCarteraCreditoExcel.do" window.setTimeout("window.open('"+url+"', '_blank', 'width=950,height=500,scrollbars=yes')",1000); } action: try { response.setContentType("application/vnd.ms-excel"); response.setHeader("Content-Disposition", "inline; filename=ConsultaCartera.xls"); consulta.setPdf(response.getOutputStream()); administracionCreditoConsulta.exportarCarteraCreditoExcel(consulta); } catch (Exception e) { logger.logError(e); } finally { response.getOutputStream().flush(); response.getOutputStream().close(); } Can someone please help me! Thanks!

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• How to delete refClass record in Doctrine?

  - by terrani

  Hi all! I have many-to-many relations with the following tables. post tag post_tag I created three classes with Doctrine, so I have the following classes as well. BasePost BaseTag BasePostTag in the setUp() method, I defined relations. I like to delete tag record when I delete post record. So I simply put cascade as descirbed on Doctrine document. $this->hasMany("Tag as Tags",array( 'refClass' => 'PostTag', 'local'=>'object_id', 'foreign'=>'tag_id', 'cascade'=> array('delete') )); it works without a problem. My questions is, how do I delete a record from post_tag table? Do I need to create a query myself?

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• Adding some delay in an recursive loop and breaking out of it on mouseover

  - by Moak

  I have created a loop function loopThem(){ $$('#main-nav a').each(function(i, n) { i.up("#main-nav").down("li.active").removeClassName("active"); i.up("li").addClassName("active"); var target = i.readAttribute("href"); i.up(".home-top").down("li.visible").removeClassName("visible"); i.up(".home-top").down(target).addClassName("visible"); }); loopThem(); } This function is called when the dom is loaded document.observe("dom:loaded", function() { loopThem(); }); It does what I want as far as rotating through a set of banners, however it does so at light speed How Can I A add a delay between the changing? B stop the loop from continuing once I mouse over?

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• Visual Studio Config File Editor - Not Formatting

  - by Ian

  Hi All, My VS 2008 seems to be acting a bit weird and the solution is eluding me. The problem is that if I open a config file; app.config or web.config, this looks and behaves as a plain text document. I have no formatting, no coloring, no intellisense and no collapsible or expandable regions. I have reset all setting and restored default file associations. If I go into the setting menu, Text Editor, XML, formatting I see an error "An error occurred loading this property page" Has any one seen this before and have you go a solution. Thanks

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• Target on click

  - by 2x2p1p

  Hi guys. Look this code: <div> <a href = "#"><span>Click me MAN !</span></a> </div> <script type = "text/javascript"> window.onload = function () { document.body.addEventListener ("click", function (event) { var target = event.target; alert ("Returns \"" + target.nodeName + "\". Just want \"" + target.parentNode.nodeName + "\"") }, false); } </script> You can see the element "span" inside a "link", when the "link" is clicked the current target is the same "span". How can the "event.target" return "link" instead of "span". Thanks and no, I don't want to use "parentNode".

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• Detect LaTeX class name

  - by Matthew Leingang

  I'm working on a LaTeX package which might need to do some things differently depending on the class that's being used. I'm wondering if there's a way to auto-detect or test the document class. One could certainly look up the class files and test for the existence of a specific macro defined by that class, but is there a smarter way? I looked at the definition of the \ProvidesClass macro and can't see if it saves the class name anywhere except \@currname. I believe \@currname is just the name of the current package or class being read. Basically I want to execute \author{\longauthorname} in the article class but \author[\shortauthorname]{\longauthorname} in the beamer class.

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• How can I use Perl to grab text from a web page that is dynamically generated with JavaScript?

  - by bstullkid

  There is a website I am trying to pull information from in Perl, however the section of the page I need is being generated using javascript so all you see in the source is: <div id="results"></div> I need to somehow pull out the contents of that div and save it to a file using Perl/proxies/whatever. e.g. the information I want to save would be document.getElementById('results').innerHTML; I am not sure if this is possible or if anyone had any ideas or a way to do this. I was using a lynx source dump for other pages but since I cant straight forward screen scrape this page I came here to ask about it! If anyone is interested, the page is http://downloadcenter.trendmicro.com/index.php?clk=left_nav&clkval=pattern_file&regs=NABU and the info I am trying to get is the row about the ConsumerOPR

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• Is this a good way to identify the type of a javascript object?

  - by FK82

  Apparently neither instanceof nor typeof deliver in terms of correctly identifying the type of every javascript object. I have come up with this function and I'm looking for some feedback: function getType() { var input = arguments[0] ; var types = ["String","Array","Object","Function","HTML"] ; //!! of the top of my head for(var n=0; n < types.length; n++) { if( input.constructor.toString().indexOf( types[n] ) != -1) { document.write( types[n] ) ; } } } Thanks for reading!

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• How to read the value of selected checkbox inside a checkboxList?

  - by Starx

  I want to know the selected value of the markup below. So that I can disabled a textbox, if one of the checkbox is selected. <asp:CheckBoxList ID="ChkTest" runat="server" RepeatDirection="Horizontal" CssClass="toggleYesNo"> <asp:ListItem Value="1">Yes</asp:ListItem> <asp:ListItem Value="0">No</asp:ListItem> </asp:CheckBoxList> I tried using this function it doesnot seem to work $(document).ready(function() { $("#<%=ChkTest.ClientID %>").click(function() { value = $(this).val(); if(value=='1') { $('#atextbox').attr('disabled',''); } else { $('#atextbox').attr('disabled','disabled'); } }); }); I also track the output HTML but the id the CheckBoxList the assigned to a table instead.

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• Replicate Printed Form With Web Form

  - by Michael

  I'm hoping people have some ideas to help solve this problem. I am developing a C# ASP.NET website and the client requires an online form that users will fill in and submit. OK, so far so good..... Imagine, say, a form that you fill in on paper - they normally have a distinctive look specific to the company and will be filed, quite possibly as a legally binding document. I need to have an online form that when submitted emails the client with something they can print out and will look exactly like their printed forms. As this is web based, I think the option of capturing a screenshot are out the question, so I'm wondering how best to approach this? Even if I just had a form that captures the data presented how I want, how could I translate this data into the view they want? Any ideas and suggestions greatly appreciated.

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• Disable page redirects using Greasemonkey

  - by Tomer Cohen

  A website I wish to tweak is using window.location in order to redirect specific users to a blocking page. That website is doing it in plain <script> tag, so it is impossible to bypass it by overriding the onload event using document.body.setAttribute('onload','');. Is there another way to inject my code to the page without using Firefox extensions such as NoScript? <!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"> <head> <title></title> <script type="text/javascript"> if (1) window.location="http://example.net" </script> </head> <body></body> </html>

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• Javascript form validation - multiple form fields larger than 0

  - by calebface

  function negativeValues(){ var myTextField = document.getElementById('digit'); if(myTextField.value < 0) { alert("Unable to submit as one field has a negative value"); return false; } } Above is a Javascript piece of code where every time a field id 'digit' has a value that's less than 0, than an alert box appears either onsubmit or onclick in the submit button. There are about 50 fields in the form that should be considered 'digit' fields where they shouldn't be anything less than 0. What should I change with this Javascript to ensure that all 'digit' like fields have this alert box pop up? I cannot use jquery/mootools for validation - it has to be flat Javascript. Thanks.

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• Jquery: Handling Checkbox Click Event with JQuery

  - by wcolbert

  I can't figure out what is going on here. I have some nested lists of checkboxes that I would like to check when the parent is checked. More importantly, I can't even get the alert to show up. It's as if the click event is not firing. Any ideas? $(document).ready(function() { $("#part_mapper_list input[type=checkbox]").click(function(){ alert("clicked"); if ($(this).attr("checked") == "checked"){ $(this + " input").attr("checked") = "checked"; } else { $(this + " input").attr("checked") = ""; } }); }

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• WYSIWYG text editor in Java

  - by Aaron Digulla

  I'd like to collect all WYSIWYG text editors for Java here. Some rules for entries: There must be a link to the project/product You must state whether it's open source or commercial Is it possible to extend the editor (add new features like a "violet centered sudoku")? Is that simple or complex? Does it come with lots of features (fancy character and paragraph styles with online spell checking for several languages in the same document) or just the basics (bold, italics, no underline)? List important dependencies (does it run on bare Java with Swing? SWT? MacOS?) Your personal opinion This list should help developers determine which editor to choose. I'm not looking for "the best" but more "what's there".

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• MongoDB efficient dealing with embedded documents

  - by Sebastian Nowak

  I have serious trouble finding anything useful in Mongo documentation about dealing with embedded documents. Let's say I have a following schema: { _id: ObjectId, ... data: [ { _childId: ObjectId // let's use custom name so we can distinguish them ... } ] } What's the most efficient way to remove everything inside data for particular _id? What's the most efficient way to remove embedded document with particular _childId inside given _id? What's the performance here, can _childId be indexed in order to achieve logarithmic (or similar) complexity instead of linear lookup? If so, how? What's the most efficient way to insert a lot of (let's say a 1000) documents into data for given _id? And like above, can we get O(n log n) or similar complexity with proper indexing? What's the most efficient way to get the count of documents inside data for given _id?

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• How do I alternate table row colors in asp.net mvc using jquery?

  - by grenade

  Probably a dumb question but I'm new to MVC and jQuery. I want to alternate the row colors of my tables and I've decided that I'm going to use jQuery to do it. I know that I could write an extension method (http://haacked.com/archive/2008/08/07/aspnetmvc_cycle.aspx), etc but after reading SH's comment on the article at http://haacked.com/archive/2008/05/03/code-based-repeater-for-asp.net-mvc.aspx I've picked jQuery as the solution I want to implement. I want to implement the method described at http://www.packtpub.com/article/jquery-table-manipulation-part2 but I haven't figured out where to put the initial jQuery call (eg: $(document).ready(function() {...}); Like I said, I'm new to jQuery...

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• ...may not be used in this context...while serialization

  - by phenevo

  Hi, I've webservice and WebMethod [webMethod] public object GetObjects(Cars[] cars) { return Translator.ToObjects(Facade.GetObjects(cars); } public static object GetObjects(Cars cars) { List<Car> cars =new List<Country(...fillingcollection) return cars.ToArray(), } public static object ToObjects(object collection) { if(collection is Car[]) { return ConvertModelCarsToContractCars(collection), } public ModelCar[] ConvertModelCarsToContractCars(Cars[] collection) { ...there is rewriting pool... } And I get exception at side of client: There was an error generating the XML document. I'm using this function to check collection which I would send to the client and it works, doesn't return exceptions: public static void SerializeContainer(object obj) { try { // Make sure even the construsctor runs inside a // try-catch block XmlSerializer ser = new XmlSerializer(typeof(object)); TextWriter w = new StreamWriter(@"c:\list.xml"); ser.Serialize(w, obj); w.Close(); } catch (Exception ex) { DumpException(ex); } } Interesting is when collection has only One element [webmethod] works fine, but when is more it brokes

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• How to solve this problem in JasperReport?

  - by Kumar

  Hi friends, I want to print a table in pdf document. I need to use two javabean datasource to populate the data in the table. So i used two subreport parallely to map the data.The problem what i am facing is i could not able to organize the second subreport content corresponding to first subreport.That is , if any field's width is big in the first subreport then content in the second report will not align properly corresponding to the first subreport.The below sample will give a good idea about the problem My expected Output SubReport1 SubReport2 S.No Value S.No Value 1 value from first 1 value from second bean java bean value bean 2 value from first bean 2 value from second bean Result which i am getting SubReport1 SubReport2 S.No Value S.No Value 1 value from first 1 value from second bean java bean value 2 value from second bean bean 2 value from first bean Please kindly help me to sort out this problem.

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• Calling a web service from javascript and .net 2.0

  - by rod

  Hi All, Is it possible to call a web service (on my localhost) from jquery in a plain html page inside an asp.net 2.0 application? <script type="text/javascript"> $(document).ready(function(){ $('#button1').click(function(){ $('#targetDiv').load('http://localhost/testservice/Service1.asmx/HelloWorld',null,function(){alert('test')}); }); }); </script> I'm getting a 500 error? Not sure if it's even possible to do this way? thanks, rod

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• Learning about version control systems, Git, SVN

  - by anijhaw

  I am a basic SVN user now trying to learn GIT for a new position. I am trying the usual reading docs and watching videos. However after doing all that I still feel that there is a lot that I do not know. I was wondering if there is a place like project Euler for programming languages, that provides a series of exercises that you can do just to increase your confidence and test your knowledge about a version control system. Something thats generic enough and gets you up to speed with how to do basic things. This could also serve as a comparison point of sorts between multiple VCSs, that would show what things are easy in which VCS. If there is nothing I was planning to document my journey in learning GIT and the create an exercise of this sort.

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• What should be proper location for sqlit3 database file?

  - by Elliot Chen

  Hi, Everyone: I'm using a sqlite3 database to store app's data. Instead of building a database within program, I introduced an existing db file: 'abc.sqlite' into my project and put it under my 'Resources' folder. So, I think this db file should be inside of 'bundle', so at my init function, I used following statement to read it out: NSString *path = [[NSBundle mainBundle] pathForResource:@"abc" ofType:"sqlite"]; if(sqlite3_open([path UTF8String], &database) != SQLITE_OK) ... It's ok that this db can be opened and data can be retrieved from it. BUT, someone told me that it's better to copy this db file into user folder: such as 'Document'. So, my question is: is it ok to use this db from main bundle directly or copy it to user folder then use that copy. Which is better? Thank you very much!

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• Same-directory includes failing on a Fedora server with PHP.

  - by JimmySawczuk

  I have a couple files that look like this: index.php: <?php include('includes/header.php'); ... includes/header.php: <?php include('config.php'); ... The error I get is Warning: require(config.php) [function.require]: failed to open stream: No such file or directory in [dir]/includes/header.php on line 2 Fatal error: require() [function.require]: Failed opening required 'config.php' (include_path='.:/usr/share/pear:/usr/share/php') in [dir]/includes/header.php on line 2 I did some further debugging: when I add the call system('pwd'); to includes/header.php, it shows [dir], where it should say [dir]/includes. Adding the 'includes/' to the include path works, but isn't desirable because that would fail on the production server. The above code works on a production server, and worked fine on my development Fedora server, until I tried to change my development environment so that the Fedora server's document root is a mounted CIFS share. Any ideas? Thanks.

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