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• Write XML using best way(Linq To XML or other)

  - by Pankaj

  Hello All I want to write my xml with following format. How can i do it?I am using c# <map borderColor='c5e5b8' fillColor='6a9057' numberSuffix=' Mill.' includeValueInLabels='0' labelSepChar=': ' baseFontSize='9' showFCMenuItem='0' hoverColor='c2bc23' showTitle='0' type='0' showCanvasBorder='0' bgAlpha='0,0' hoveronEmpty='1' includeNameInLabels='0' showLabels='1'> <!--toolText='Alaska'imageSave='1' imageSaveURL='Path/FusionChartsSave.aspx or FusionChartsSave.php'--> <data> <entity id='AL' value='AL' link="JavaScript:FilterClientProjectList('AL');" fontBold='1' showLabel='0' /> <entity id='AK' value='AK' link="JavaScript:FilterClientProjectList('AK');" fontBold='1' hoverColor='6a9057'/> <entity id='AZ' value='AZ' link="JavaScript:FilterClientProjectList('AZ');" fontBold='1'/> </data> <styles> <definition> <style name='MyFirstFontStyle' type='font' face='Verdana' size='11' color='0372AB' bold='1' bgColor='FFFFFF' /> </definition> <application> <apply toObject='Labels' styles='' /> </application> </styles> </map> Thanks in advance..

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• How do I shrink a matrix using an array mask in MATLAB?

  - by Pyrolistical

  This seems to be a very common problem of mine: data = [1 2 3; 4 5 6]; mask = [true false true]; mask = repmat(mask, 2, 1); data(mask) ==> [1; 4; 3; 6] What I wanted was [1 3; 4 6]. Yes I can just reshape it to the right size, but that seems the wrong way to do it. Is there a better way? Why doesn't data(mask) return a matrix when it is actually rectangular? I understand in the general case it may not be, but in my case since my original mask is an array it always will be. Corollary Thanks for the answer, I just also wanted to point out this also works with anything that returns a numeric index like ismember, sort, or unique. I used to take the second return value from sort and apply it to every column manually when you can use this notion to do it one shot.

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• Version control a content management system?

  - by Mike

  I have the following directory structure in the CMS application we have written: /application /modules /cms /filemanager /block /pages /sitemap /youtube /rss /skin /backend /default /css /js /images /frontend /default /css /js /images Application contains code specific to the current CMS implementation, i.e code for this specific cms. Modules contain reusable portions of code that we share across projects, such as libraries to work with youtube or rss feeds. We include these as git submodules, so that we can update the module in any website and push the changes back across all other projects. It makes it really easy to apply a change to our code and distribute it. We wanted to turn the CMS into a module so we get the same benefit - we can run the entire project under source control, then update the cms as required through a git-submodule. We have run into a problem however: the cms requires javascript/images/css in order for it to work correctly. Things we have thought about: We could create 2 submodules, one for cms-skin and one for cms, but this means you cannot "git pull" one version without having some idea of which versions of skin work with which versions of cms. i.e version 1.2.2 CMS might have issues with 1.0.3 CMS-Skin We could add the skin to the cms module but this has the following problems: Skin should be available on the document root, module code shouldn't be, and if it is it should probably be secured via .htaccess It doesn't seem to make any sense bundling assets with php code We could create a symlink between /skin/backend/ to go to /modules/cms/skin but does this cause any security problems, and do we want to require something like a symlink for the application to work? We could create a hook for git or a shell script that copies files from modules/cms/skin to skin/backend when an update occurs, but this means we lose the ability to edit CMS core files in a project then push them back How is this typically done in large scale cms's? How is it possible to get the source code for a cms under version control, work on the application for a client, then update the sourcecode as releases and given by the vendor? How do applications like Magento or Drupal do this?

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• iteration in latex

  - by Tim

  Hi, I would like to use some iteration control flow to simplify the following latex code \begin{sidewaystable} \caption{A glance of images} \centering \begin{tabular}{| c ||c| c| c |c| c|| c |c| c|c|c| } \hline \backslashbox{Theme}{Class} &\multicolumn{5}{|c|}{Class 0} & \multicolumn{5}{|c|}{Class 1} \\ \hline \hline 1 & \includegraphics[scale=2]{../../results/1/0_1.eps} &\includegraphics[scale=2]{../../results/1/0_2.eps} &\includegraphics[scale=2]{../../results/1/0_3.eps} &\includegraphics[scale=2]{../../results/1/0_4.eps} &\includegraphics[scale=2]{../../results/1/0_5.eps} &\includegraphics[scale=2]{../../results/1/1_1.eps} &\includegraphics[scale=2]{../../results/1/1_2.eps} &\includegraphics[scale=2]{../../results/1/1_3.eps} &\includegraphics[scale=2]{../../results/1/1_4.eps} &\includegraphics[scale=2]{../../results/1/1_5.eps} \\ \hline \hline 2 & \includegraphics[scale=2]{../../results/2/0_1.eps} &\includegraphics[scale=2]{../../results/2/0_2.eps} &\includegraphics[scale=2]{../../results/2/0_3.eps} &\includegraphics[scale=2]{../../results/2/0_4.eps} &\includegraphics[scale=2]{../../results/2/0_5.eps} &\includegraphics[scale=2]{../../results/2/1_1.eps} &\includegraphics[scale=2]{../../results/2/1_2.eps} &\includegraphics[scale=2]{../../results/2/1_3.eps} &\includegraphics[scale=2]{../../results/2/1_4.eps} &\includegraphics[scale=2]{../../results/2/1_5.eps} \\ \hline ... % similarly for 3, 4, ..., 22 \hline 23 & \includegraphics[scale=2]{../../results/23/0_1.eps} &\includegraphics[scale=2]{../../results/23/0_2.eps} &\includegraphics[scale=2]{../../results/23/0_3.eps} &\includegraphics[scale=2]{../../results/23/0_4.eps} &\includegraphics[scale=2]{../../results/23/0_5.eps} &\includegraphics[scale=2]{../../results/23/1_1.eps} &\includegraphics[scale=2]{../../results/23/1_2.eps} &\includegraphics[scale=2]{../../results/23/1_3.eps} &\includegraphics[scale=2]{../../results/23/1_4.eps} &\includegraphics[scale=2]{../../results/23/1_5.eps} \\ \hline \end{tabular} \end{sidewaystable} I learn that the forloop package provides the for loop. But I am not sure how to apply it to my case? Or other methods not by forloop? Thanks and regards! Update: If I also want to simply another similar case, where the only difference is that the directory does not run from 1, 2, to 23, but in some arbitrary order such as 3, 2, 6, 9,..., or even a list of strings such as dira, dirc, dird, dirb,.... How to make the latex code into loops then? Thanks!

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• Implement DDD and drawing the line between the an Entity and value object

  - by William

  I am implementing an EMR project. I would like to apply a DDD based approach to the problem. I have identified the "Patient" as being the core object of the system. I understand Patient would be an entity object as well as an aggregrate. I have also identified that every patient must have a "Doctor" and "Medical Records". The medical records would encompass Labs, XRays, Encounter.... I believe those would be entity objects as well. Let us take a Encounter for example. My implementation currently has a few fields as "String" properties, which are the complaint, assessment and plan. The other items necessary for an Encounter are vitals. I have implemented vitals as a value object. Given that it will be necessary to retrieve vitals without haveing to retrieve each Encounter then do vitals become part of the Encounter aggregate and patient aggregrate. I am assuming I could view the Encounter as an aggregrate, because other items are spwaned from the Encounter like prescriptions, lab orders, xrays. Is approach right that I am taking in identifying my entities and aggregates. In the case of vitals, they are specific to a patient, but outside of that there is not any other identity associated with them.

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• jQuery Cycle plugin pagerAnchorBuilder images becoming undefined

  - by Casey Becking

  I have a slideshow built in flash that I want to mimic in jQuery. The slide show uses the images from the slideshow as the pager numbers. The problem im having is once i apply links to the slideshow images the pagerAnchorBuilder image returns an undefined for the src of the image. Javascript - $(function() { $('#slideshow').before('<ul id="nav">').cycle({ fx: 'fade', timeout: 7000, pager: '#nav', pagerAnchorBuilder: function(idx, slide) { return '<li><a href="#"><img src="' + slide.src + '" width="100" height="60" /></a></li>'; } }); }); HTML - <div id="slideshow" class="pics"> <a href="http://google.com"><img src="home_1.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_2.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_3.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_4.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_5.jpg" width="1000" height="600" /></a> </div> If i remove the href's from the slideshow the images in the pager show up without issues. Im not sure if this is a bug or something i need to find a fix for?

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• IIRF redirect combine rules?

  - by Phill

  I have 3 "rules". One to make sure URLs are lowercase another to include a slash at the end of directories, and a 3rd to force access to index.html pages to be thru the directory instead. The problem w/ how I have it is, sometimes this is causing multiple 301 redirects. I'd really like each rule to apply in turn and then if neccessary redirect once to the final url. For example a url might need to be converted to lowercase and have a slash added. Or may need to be lowecase and change from index.html to a directory. Any ideas how I can do this? Thanks very much. The rules are below: #LOWERCASE URLS For Directories, aspx, html files RedirectRule ^/(.*[A-Z].*(/|\.html|\.aspx))$ /#L$1#E [R=301] #ADD SLASH TO DIRECTORIES #--------------------------------------------- #Perm Redirect If: #Starts w/ Forward Slash #Match Any Characters Except (. or ?) 1 or more times #End w/ someting besides a dot, ?, or slash #If So, Perm Redirect captured piece W/ Slash At End and at front RedirectRule ^/([^.?]+[^.?/])$ /$1/ [I,R=301] #CHANGE INDEX.HTML REQUESTS TO DIRECTORY REQUESTS #--------------------------------------------- RedirectRule ^/(.*)/index\.html$ /$1/ [I,R=301]

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• Flex 3 : UIComponent.addChild issue

  - by Frank

  Hello SOers, I've run into a nice problem with the UIComponent.addChild(...) function. First of all, I'm using ESRI Api for Flex. In this API you find a class called Graphic that inherits UIComponent. Basically, I'm trying to add, as a child, a Graphic 'g' to another graphic 'parent'. So that when you delete the 'parent' graphic the 'g' graphic deletes as well. private function writeMeasurements(parent:Graphic):void { var g:Graphic; if(parent.geometry.extent != null) g = new Graphic(parent.geometry.extent.center); else g = new Graphic(parent.geometry); g.initialize(); g.name = UIDUtil.createUID(); g.symbol = txtSym; graphicsLayer.add(g); parent.addChild(g); } graphicsLayer class This code actually runs pretty fine. The problem is after... it's like if the addChild function was asynchronious. This is the error I get : TypeError: Error #1009: Il est impossible d'accéder à la propriété ou à la méthode d'une référence d'objet nul. at com.esri.ags::Graphic/updateDisplayList()[C:\checkout\flex_api\api\src\com\esri\ags\Graphic.as:346] at mx.core::UIComponent/validateDisplayList() at mx.managers::LayoutManager/validateDisplayList() at mx.managers::LayoutManager/doPhasedInstantiation() at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/callLaterDispatcher2() at mx.core::UIComponent/callLaterDispatcher() I know this is a very specific question, but I think you guys are the BEST! Thanks.

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• How to manage Javascript modules in django templates?

  - by John Mee

  Lets say we want a library of javascript-based pieces of functionality (I'm thinking jquery): For example: an ajax dialog a date picker a form validator a sliding menu bar an accordian thingy There are four pieces of code for each: some Python, CSS, JS, & HTML. What is the best way to arrange all these pieces so that: each javascript 'module' can be neatly reused by different views the four bits of code that make up the completed function stay together the css/js/html parts appear in their correct places in the response common dependencies between modules are not repeated (eg: a javascript file in common) x-------------- It would be nice if, or is there some way to ensure that, when called from a templatetag, the templates respected the {% block %} directives. Thus one could create a single template with a block each for CSS, HTML, and JS, in a single file. Invoke that via a templatetag which is called from the template of whichever view wants it. That make any sense. Can that be done some way already? My templatetag templates seem to ignore the {% block %} directives. x-------------- There's some very relevant gasbagging about putting such media in forms here http://docs.djangoproject.com/en/dev/topics/forms/media/ which probably apply to the form validator and date picker examples.

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• Navigating through a sea of hype

  - by wouldLikeACrystalBall

  This is a vague, open question, so if you have no interest in these, please leave now. A few years ago it seemed everyone thought the death of desktop software was imminent. Web applications were the future. Everyone would move to cloud-based software-as-a-service systems, and developing applications for specific end-user platforms like Windows would soon become something of a ghetto. Joel's "How Microsoft Lost the API War" was but one of many such pieces sounding the death knell for this way of software development. Flash-forward to 2010, and the hype is all around mobile devices, particularly the iPhone. Software-as-a-Service vendors--even small ones such as YCombinator startups--go out of their way to build custom applications for the iPhone and other smart phone devices; applications that can be quite sophisticated, that run only on specific hardware and software architectures and are thus inherently incompatible. Now some of you are probably thinking, "Well, only the decline of desktop software was predicted; mobile devices aren't desktops." But the term was used by those predicting its demise to mean laptops also, and really any platform capable of running a browser. What was promised was a world where HTML and related standards would supplant native applications and their inherent difficulties. We would all code to the browser, not the OS. But here we are in 2010 with the AppStore bulging and development for the iPad just revving up. A few days ago, I saw someone on Hacker News claim that the future of computing was entirely in small, portable devices. Apparently the future is underpowered, requires dexterous thumbs and induces near-sightedness. How do those who so vehemently asserted one thing now assert the opposite with equal vehemence, without making even the slightest admission of error? And further, how are we as developers supposed to sift through all of this? I bought into the whole web-standards utopianism that was in vogue back in '06-'07 and now feel like it was a mistake. Is there some formula one can apply rather than a mere appeal to experience?

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• constructing paramater query SQL - LIKE % in .cs and in grid view

  - by Indranil Mutsuddy

  Hello friends, I am trying to implement admin login and operators(india,australia,america) login, now operator id starts with 'IND123' 'AUS123' and 'AM123' when operator india logs in he can see the details of only members have id 'IND%', the same applies for an australian and american users and when admin logs in he can see details of members with id 'IND%' or 'AUS%' or 'AM%' i have a table which defines the role i.e admin or operator and their prefix(IND,AUS respectively) In loginpage i created a session for Role and prefix PREFIX = myReader["Prefix"].ToString(); Session["LoginRole"] = myReader["Role"].ToString(); Session["LoginPrefix"] = String.Concat(PREFIX + "%"); works fine In main page(after login) i have to count the number of member so i wrote string prefix = Session["LoginPrefix"].ToString(); string role = Session["LoginRole"].ToString(); if (role.Equals("ADMIN")) StrMemberId = "select count(*) from MemberList"; else StrMemberId = "select count(*) from MemberList where MemberID like '"+prefix+"'"; thatworks fine too Problem: 1. i want to constructor parameter something like StrMemberId = "select count(*) from MemberList where MemberID like '@prefix+'"; myCommd.Parameters.AddWithValue("@prefix", prefix); Which is not working 2 Displaying the members in gridview i need to give condition (something like if (role.Equals("ADMIN")) show all members else show member depending on the operator prefix)the list of members in operator mode and admin mode. - where to put the condition in gridview how to apply these please suggest something Regards Indranil

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• WCF: Per-Call and Per-Session services...need convincing that Per-Call is worthwhile

  - by mrlane

  Hello all. We are currently doing a review of our WCF service design and one thing that is bothering me is the decision between Per-Call and Per-Session services. I believe I understand the concept behind both, but I am not really seeing the advantage of Per-Call services. I understand that the motivation for using Per-Call services is that a WCF services only holds a servier object for the life of a call thereby restricting the time that an expensive resource is held by the service instance, but to me its much simpler to use the more OO like Per-Session model where your proxy object instance always corrisponds to the same server object instance and just handle any expensive resources manually. For example, say I have a CRUD Service with Add, Update, Delete, Select methods on it. This could be done as a Per-Call service with database connection (the "expensive resource") instanciated in the server object constructor. Alternately it could be a Per-Session service with a database connection instanciated and closed within each CRUD method exposed. To me it is no different resource wise and it makes the programming model simpler as the client can be assured that they always have the same server object for their proxies: any in-expensive state that there may be between calls is maintained and no extra parameters are needed on methods to identify what state data must be retrieved by the service when it is instanciating a new server object again (as in the case of Per-Call). Its just like using classes and objects, where the same resource management issues apply, but we dont create new object instances for each method call we have on an object! So what am I missing with the Per-Call model? Thanks

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• ICollectionView.SortDescriptions sort does not work if underlying DataTable has zero rows

  - by BigBlondeViking

  We have a WPF app that has a DataGrid inside a ListView. private DataTable table_; We do a bunch or dynamic column generation ( depending on the report we are showing ) We then do the a query and fill the DataTable row by row, this query may or may not have data.( not the problem, an empty grid is expected ) We set the ListView's ItemsSource to the DefaultView of the DataTable. lv.ItemsSource = table_.DefaultView; We then (looking at the user's pass usage of the app, set the sort on the column) Sort Method below: private void Sort(string sortBy, ListSortDirection direction) { ICollectionView dataView = CollectionViewSource.GetDefaultView(lv.ItemsSource); dataView.SortDescriptions.Clear(); var sd = new SortDescription(sortBy, direction); dataView.SortDescriptions.Add(sd); dataView.Refresh(); } In the Zero DataTable rows scenario, the sort does not "hold"? and if we dynamically add rows they will not be in sorted order. If the DataTable has at-least 1 row when the sort is applied, and we dynamically add rows to the DataTable, the rows com in sorted correctly. I have built a standalone app that replicate this... It is an annoyance and I can add a check to see if the DataTable was empty, and re-apply the sort... Anyone know whats going on here, and am I doing something wrong? FYI: What we based this off if comes from the MSDN as well: http://msdn.microsoft.com/en-us/library/ms745786.aspx

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• javadoc and overloaded methods

  - by skrebbel

  Hi all, I'm developing an API with many identically named methods that just differ by signature, which I guess is fairly common. They all do the same thing, except that they initialize various values by defaults if the user does not want to specify. As a digestible example, consider public interface Forest { public Tree addTree(); public Tree addTree(int amountOfLeaves); public Tree addTree(int amountOfLeaves, Fruit fruitType); public Tree addTree(int amountOfLeaves, int height); public Tree addTree(int amountOfLeaves, Fruit fruitType, int height); } The essential action performed by all of these methods is the same; a tree is planted in the forest. Many important things users of my API need to know about adding trees hold for all these methods. Ideally, I would like to write one Javadoc block that is used by all methods: /** * Plants a new tree in the forest. Please note that it may take * up to 30 years for the tree to be fully grown. * * @param amountOfLeaves desired amount of leaves. Actual amount of * leaves at maturity may differ by up to 10%. * @param fruitType the desired type of fruit to be grown. No warranties * are given with respect to flavour. * @param height desired hight in centimeters. Actual hight may differ by * up to 15%. */ In my imagination, a tool could magically choose which of the @params apply to each of the methods, and thus generate good docs for all methods at once. With Javadoc, if I understand it correctly, all I can do is essentially copy&paste the same javadoc block five times, with only a slightly differing parameter list for each method. This sounds cumbersome to me, and is also difficult to maintain. Is there any way around that? Some extension to javadoc that has this kind of support? Or is there a good reason why this is not supported that I missed?

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• WPF Dispatcher.UnhandledException within a ShowDialog call.

  - by Eric

  It appears that ShowDialog() invokes the Dispatcher message handling loop within. Thus, you have a stack that looks something like: Outer-most Dispatcher message loop ... x.ShowDialog() Inner Dispatcher message loop ... I am using the Dispatcher.UnhandledException to catch exceptions not handled by my code. However, it appears that the Inner Dispatcher message loop, above, is undesirably catching exceptions that my code would catch. Example: Outer-most Dispatcher message loop try/catch FooException ... x.ShowDialog() Inner Dispatcher message loop ... throw FooException What I would like is for the thrown FooException to get caught by the try/catch. However. It gets caught first by the (inner) Dispatcher.UnhandledException. I see there are ways to filter the exception. However, those filters will apply to both the inner and outer most handlers. What I am looking for is to have my Dispatcher.UnhandledException code run only on the outer-most dispatcher message loop. Does that make sense? I could, of course, reflect the call stack from within my handler to see if this is the outer-most dispatcher, but that seems a bit fragile. Other ideas? Thanks! Eric

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• SQL query to count and list the different counties per zip code

  - by Chris

  I have a sql server 2005 table called ZipCode, which has all the US ZIPs in it. For each entry, it lists the zip, county, city, state, and several other details. Some zipcodes span multiple cities and some even span multiple counties. As a result, some zipcodes appear many times in the table. I am trying to query the table to see which zipcodes go across multiple counties. This is what I have so far: select zipcode, count(zipcode) as total, county, state from zipcode group by zipcode, county, state order by zipcode Of 19248 records in the result set, here are the first several records returned: zipcode total county state 00501 2 SUFFOLK NY 00544 2 SUFFOLK NY 00801 3 SAINT THOMAS VI 00802 3 SAINT THOMAS VI 00803 3 SAINT THOMAS VI 00804 3 SAINT THOMAS VI 00805 1 SAINT THOMAS VI 00820 2 SAINT CROIX VI 00821 1 SAINT CROIX VI 00822 1 SAINT CROIX VI 00823 2 SAINT CROIX VI 00824 2 SAINT CROIX VI In this particular example, each zip with a total of two or more happens to be in the table more than once, and it's because the "cityaliasname" (not shown) or some other column differs. But I just want to know which zips are in there more than once because the county column differs. I searched before posting this and I found many questions about counting records but I could not figure out how to apply them to my problem. Please forgive me if there is already a question whose answer applies to this question.

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• iphone - making the CGAffineTransform permanent

  - by Mike

  I am banging my head on the wall here due to this problem: When I create a UIImageView this view has a certain orientation and size. Lets call this state "A". This view responds to taps. It can be dragged around the screen. At some point in the code I apply a CGAffineTransform to the view. Does not matter if the affine is a scale, a rotation, a translation or a combination of all. Does not matter also if the transform is absolute or relative. Not to mention the device can change its orientation and the view is autorotated to the correct orientation (that we can cay is a kind of rotation or transformation applied to the view). The problem is: the moment I touch that object or try to animate its transparency or any other parameter, it "remembers" the state "A" and does all animations from that state, not from current state. If I simply touch the view, it returns instantly to state "A". The code is not doing it by itself. It is an annoying "gift" from Apple. How to I make a view assume its current state of transformations as the reset or initial state? In other words, how do I make a view forget its past transformations or states? The only way I know is recreating the view, but this is a ridiculous way of doing this. Is there any way to make this work as I described? thanks

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• Jeditable Datepicker onblur problem

  - by Shobha Deepthi

  Hi, I am using inline editing using Jeditable and datepicker. I have a column in my table which displays Date as a hyperlink. When I click on this it shows me the datepicker. And when a particular date is selected its updated in the backend and the cell now is updated with the changed value. However, am having problem with onblur event while changing month or years. This event gets triggered when I click on "Prev" or "Next" buttons on the datepicker control. This causes an exception when the date is selected. This works fine as long as the date selected is in the current month. I tried all possible solutions listed here: stackoverflow.com/questions/2007205/jeditable-datepicker-causing-blur-when-changing-month If settimeout the control does not change back to a normal hyperlink on closing the datepicker or on a true onblur event. Here's my code, $.editable.addInputType('datepicker', { element : function(settings, original) { var input = $(''); if (settings.width != 'none') { input.width(settings.width); } if (settings.height != 'none') { input.height(settings.height); } input.attr('autocomplete','off'); $(this).append(input); return(input); }, plugin : function(settings, original) { var form = this; settings.onblur = function(e) { t = setTimeout(function() { original.reset.apply(form, [settings, self]); }, 100); }; $(this).find('input').datepicker({ changeMonth: true, changeYear: true, dateFormat: 'dd-M-y', closeAtTop: true, onSelect: function(dateText) { $(this).hide(); $(form).trigger('submit'); } }); }, submit : function(settings, original) { } }); $(function() { $('.edit_eta').editable('update_must_fix_eta.php', { id: 'bugid', name: 'eta', type: 'datepicker', event: 'click', select : true, width: '50px', onblur:'cancel', cssclass : 'editable', indicator : 'Updating ETA, please wait.', style : 'inherit', submitdata:{version:'4.2(4)',tag:'REL_4_2_4',qstr:1} }); }); I tried hacking jeditable.js as mentioned on this link: http://groups.google.com/group/jquery-dev/browse_thread/thread/265340ea692a2f47 Even this does not help. Any help is appreciated.

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• Memory leak when using Workflow 4.0 SqlWorkflowInstanceStore and PersistableIdleAction.Unload

  - by Rohland

  Hi, This particular problem is driving me nuts. I wonder if anyone has experienced a similar problem. If I load up a workflow then unload it and perform a memory snapshot then the result is predictable - my workflow is no longer in memory. However, if I load up a workflow and set the PersistableIdle action to PersistableIdleAction.Unload and let the workflow idle the workflow remains in memory even though the Unload action fires. I used ANTS Memory Profiler to debug this issue. This is the object retention graph outputted showing that an internal object is hanging onto my workflow instance. Can anyone else verify this problem? My code amounts to the following: Create SqlWorkflowInstanceStore and setup lock owner handle -- At this point I take a memory snapshot Create an instance of Workflow1 Set the PersistableIdle action Apply the instancestore to Workflow1 Setup action event handlers for Idle, Unload, UnhandledException etc. Persist the workflow instance Run the workflow instance Wait for instance to idle (caused by Delay activity) Ensure the Unload action is fired -- At this point I take a second memory snapshot From the above image, it is clear that the only object referencing Workflow1 is some internal event handlers result which I have no ability to dispose of. Any clues?

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• What's the recommended implemenation for hashing OLE Variants?

  - by Barry Kelly

  OLE Variants, as used by older versions of Visual Basic and pervasively in COM Automation, can store lots of different types: basic types like integers and floats, more complicated types like strings and arrays, and all the way up to IDispatch implementations and pointers in the form of ByRef variants. Variants are also weakly typed: they convert the value to another type without warning depending on which operator you apply and what the current types are of the values passed to the operator. For example, comparing two variants, one containing the integer 1 and another containing the string "1", for equality will return True. So assuming that I'm working with variants at the underlying data level (e.g. VARIANT in C++ or TVarData in Delphi - i.e. the big union of different possible values), how should I hash variants consistently so that they obey the right rules? Rules: Variants that hash unequally should compare as unequal, both in sorting and direct equality Variants that compare as equal for both sorting and direct equality should hash as equal It's OK if I have to use different sorting and direct comparison rules in order to make the hashing fit. The way I'm currently working is I'm normalizing the variants to strings (if they fit), and treating them as strings, otherwise I'm working with the variant data as if it was an opaque blob, and hashing and comparing its raw bytes. That has some limitations, of course: numbers 1..10 sort as [1, 10, 2, ... 9] etc. This is mildly annoying, but it is consistent and it is very little work. However, I do wonder if there is an accepted practice for this problem.

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• App freezing after lunch without any Error on Iphone Simulator?

  - by Meko

  HI.I am using CoreData on my UITable to show some records.It works when I first run.But if I run my app on simulator second time it shows up with data but then it stops.Sometimes it quits from app or it only froze and i cant click on table or tab bar. I looked also on Console but I thought there is no error.Here output from console The Debugger has exited with status 0. [Session started at 2010-03-30 00:22:06 +0300.] 2010-03-30 00:22:08.660 Paparazzi2[3556:207] Creating Photo: Urban disaster 2010-03-30 00:22:08.661 Paparazzi2[3556:207] Person is: Josh 2010-03-30 00:22:08.665 Paparazzi2[3556:207] Person is: Josh 2010-03-30 00:22:08.665 Paparazzi2[3556:207] -- Person Exists : Josh-- 2010-03-30 00:22:08.719 Paparazzi2[3556:207] Creating Photo: Concrete pitch forks 2010-03-30 00:22:08.719 Paparazzi2[3556:207] Person is: Josh 2010-03-30 00:22:08.721 Paparazzi2[3556:207] Person is: Josh 2010-03-30 00:22:08.721 Paparazzi2[3556:207] -- Person Exists : Josh-- 2010-03-30 00:22:08.727 Paparazzi2[3556:207] Creating Photo: Leaves on fire 2010-03-30 00:22:08.728 Paparazzi2[3556:207] Person is: Al 2010-03-30 00:22:08.734 Paparazzi2[3556:207] Person is: Al 2010-03-30 00:22:08.734 Paparazzi2[3556:207] -- Person Exists : Al-- [Session started at 2010-03-30 00:22:08 +0300.] GNU gdb 6.3.50-20050815 (Apple version gdb-967) (Tue Jul 14 02:11:58 UTC 2009) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-apple-darwin".sharedlibrary apply-load-rules all Attaching to process 3556. (gdb)

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• Confused about C++'s std::wstring, UTF-16, UTF-8 and displaying strings in a windows GUI

  - by dfrey

  I'm working on a english only C++ program for Windows where we were told "always use std::wstring", but it seems like nobody on the team really has much of an understanding beyond that. I already read the question titled "std::wstring VS std::string. It was very helpful, but I still don't quite understand how to apply all of that information to my problem. The program I'm working on displays data in a Windows GUI. That data is persisted as XML. We often transform that XML using XSLT into HTML or XSL:FO for reporting purposes. My feeling based on what I have read is that the HTML should be encoded as UTF-8. I know very little about GUI development, but the little bit I have read indicates that the GUI stuff is all based on UTF-16 encoded strings. I'm trying to understand where this leaves me. Say we decide that all of our persisted data should be UTF-8 encoded XML. Does this mean that in order to display persisted data in a UI component, I should really be performing some sort of explicit UTF-8 to UTF-16 transcoding process? I suspect my explanation could use clarification, so I'll try to provide that if you have any questions.

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• Reinforcement learning toy project

  - by Betamoo

  My toy project to learn & apply Reinforcement Learning is: - An agent tries to reach a goal state "safely" & "quickly".... - But there are projectiles and rockets that are launched upon the agent in the way. - The agent can determine rockets position -with some noise- only if they are "near" - The agent then must learn to avoid crashing into these rockets.. - The agent has -rechargable with time- fuel which is consumed in agent motion - Continuous Actions: Accelerating forward - Turning with angle I need some hints and names of RL algorithms that suit that case.. - I think it is POMDP , but can I model it as MDP and just ignore noise? - In case POMDP, What is the recommended way for evaluating probability? - Which is better to use in this case: Value functions or Policy Iterations? - Can I use NN to model environment dynamics instead of using explicit equations? - If yes, Is there a specific type/model of NN to be recommended? - I think Actions must be discretized, right? I know it will take time and effort to learn such a topic, but I am eager to.. You may answer some of the questions if you can not answer all... Thanks

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• Fix common library functions, or abandon then?

  - by Ian Boyd

  Imagine i have a function with a bug in it: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" return City+", "+State; } So the call: MakeLocation("Springfield", "MO"); would return "Springfield, MO" Now there's a slight problem, what if the user called: MakeLocation("Springfield, MO", "OH"); The called it wrong, obviously. But the function would return "Springfield, MO, OH". The system was functioning like this for many years, until i noticed the function being used wrong, and i corrected it. And i also updated the original function to catch such an obvious mistake - in case it's happening elsewhere: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" if (City.Contains, ",") throw new EMakeLocationException("City name contains a comma. You probably didn't mean that"); return City+", "+State; } And testing showed the problem fixed. Except we missed an edge case, and the customer found it. So now the moral dillema. Do you ever add new sanity checks, safety checks, assertions to exising code? Or do you call the old function abandoned, and have a new one: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" return City+", "+State; } Boolean MakeLocation2(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" if (City.Contains, ",") throw new EMakeLocationException("City name contains a comma. You probably didn't mean that"); return City+", "+State; } The same can apply for anything: Question FetchQuestion(Int id) { if (id == 0) throw new EFetchQuestionException("No question ID specified"); ... } Do you risk breaking existing code, at the expense of existing code being wrong?

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• How to solve "catastrophic failure" with 32-bit COM component in SysWOW64\cscript or wscript

  - by kcrumley

  I'm trying to run a VBScript script that uses a 7-year-old 3rd-party 32-bit COM component on Windows Server 2008 R2, with the command-line 32-bit script host, SysWOW64\cscript.exe. When I call CreateObject on the class, it appears to be successful, but the very first time I try to use a property or method (I've tried several different ones) on the object, it gives me the "catastrophic failure". I have identical results with SysWOW64\wscript.exe, except, of course, that my error message comes in a msgbox instead of the command-line window. I think this has to do specifically with the 64-bit scripting hosts because of the following: The equivalent Classic ASP script, calling the same component and using 95% of the same code, works correctly on the same server, with IIS configured to support 32-bit COM. The same VBScript works correctly on a 32-bit Windows XP machine and a 32-bit Windows Server 2003 machine. The component fails in exactly the same way on my 64-bit Windows 7 machine. My Google searches for solutions to this problem have mostly turned up a lot of different problems that were solved by putting the COM component into a toolbar in Visual Studio. Obviously, that solution doesn't apply here. My questions are: Is there a core problem that is always behind a "catastrophic failure" from a Windows scripting host calling a COM component? Is there a place in a configuration snap-in, or in the registry, where I need to make a change similar to the change I had to make to the IIS Application pool to "Enable 32-bit Applications"? Is there a general place in the Server 2008 R2 Event Viewer that I should be looking, to see if there are any more details on the failure, in case it turns out to be specific to this component? Thanks in advance.

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