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• How to insert Flash without JavaScript in the most compatible but valid way?

  - by Andreas Gohr

  I'm looking for a way to embed Flash into a XHTML Transitional page that does not rely on enabled JavaScript, which validates and that works across all major Browsers including IE6. So far I'm using this solution which seems to work just fine: http://latrine.dgx.cz/how-to-correctly-insert-a-flash-into-xhtml#toc-final-solution However, when this method is used in an RSS Feed it seems that Feedburner and Google Reader at least (maybe other feed readers, too) strip the whole object tags and only leave the alternative content. Any suggestions how to improve this?

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• What is wrong here (will update): subset in geom_point does not work as expected

  - by Andreas

  I ask the following in the hope that someone might come up with a generic description about the problem.Basically I have no idea whats wrong with my code. When I run the code below, plot nr. 8 turns out wrong. Specifically the subset in geom_point does not work the way it should. If somebody can tell me what the problem is, I'll update this post. SOdata <- structure(list(id = 10:55, one = c(7L, 8L, 7L, NA, 7L, 8L, 5L, 7L, 7L, 8L, NA, 10L, 8L, NA, NA, NA, NA, 6L, 5L, 6L, 8L, 4L, 7L, 6L, 9L, 7L, 5L, 6L, 7L, 6L, 5L, 8L, 8L, 7L, 7L, 6L, 6L, 8L, 6L, 8L, 8L, 7L, 7L, 5L, 5L, 8L), two = c(7L, NA, 8L, NA, 10L, 10L, 8L, 9L, 4L, 10L, NA, 10L, 9L, NA, NA, NA, NA, 7L, 8L, 9L, 10L, 9L, 8L, 8L, 8L, 8L, 8L, 9L, 10L, 8L, 8L, 8L, 10L, 9L, 10L, 8L, 9L, 10L, 8L, 8L, 7L, 10L, 8L, 9L, 7L, 9L), three = c(7L, 10L, 7L, NA, 10L, 10L, NA, 10L, NA, NA, NA, NA, 10L, NA, NA, 4L, NA, 7L, 7L, 4L, 10L, 10L, 7L, 4L, 7L, NA, 10L, 4L, 7L, 7L, 7L, 10L, 10L, 7L, 10L, 4L, 10L, 10L, 10L, 4L, 10L, 10L, 10L, 10L, 7L, 10L), four = c(7L, 10L, 4L, NA, 10L, 7L, NA, 7L, NA, NA, NA, NA, 10L, NA, NA, 4L, NA, 10L, 10L, 7L, 10L, 10L, 7L, 7L, 7L, NA, 10L, 7L, 4L, 10L, 4L, 7L, 10L, 2L, 10L, 4L, 12L, 4L, 7L, 10L, 10L, 12L, 12L, 4L, 7L, 10L), five = c(7L, NA, 6L, NA, 8L, 8L, 7L, NA, 9L, NA, NA, NA, 9L, NA, NA, NA, NA, 7L, 8L, NA, NA, 7L, 7L, 4L, NA, NA, NA, NA, 5L, 6L, 5L, 7L, 7L, 6L, 9L, NA, 10L, 7L, 8L, 5L, 7L, 10L, 7L, 4L, 5L, 10L), six = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), .Label = c("2010-05-25", "2010-05-27", "2010-06-07"), class = "factor"), seven = c(0.777777777777778, 0.833333333333333, 0.333333333333333, 0.888888888888889, 0.5, 0.888888888888889, 0.777777777777778, 0.722222222222222, 0.277777777777778, 0.611111111111111, 0.722222222222222, 1, 0.888888888888889, 0.722222222222222, 0.555555555555556, NA, 0, 0.666666666666667, 0.666666666666667, 0.833333333333333, 0.833333333333333, 0.833333333333333, 0.833333333333333, 0.722222222222222, 0.833333333333333, 0.888888888888889, 0.666666666666667, 1, 0.777777777777778, 0.722222222222222, 0.5, 0.833333333333333, 0.722222222222222, 0.388888888888889, 0.722222222222222, 1, 0.611111111111111, 0.777777777777778, 0.722222222222222, 0.944444444444444, 0.555555555555556, 0.666666666666667, 0.722222222222222, 0.444444444444444, 0.333333333333333, 0.777777777777778), eight = c(0.666666666666667, 0.333333333333333, 0.833333333333333, 0.666666666666667, 1, 1, 0.833333333333333, 0.166666666666667, 0.833333333333333, 0.833333333333333, 1, 1, 0.666666666666667, 0.666666666666667, 0.333333333333333, 0.5, 0, 0.666666666666667, 0.5, 1, 0.666666666666667, 0.5, 0.666666666666667, 0.666666666666667, 0.666666666666667, 0.333333333333333, 0.333333333333333, 1, 0.666666666666667, 0.833333333333333, 0.666666666666667, 0.666666666666667, 0.5, 0, 0.833333333333333, 1, 0.666666666666667, 0.5, 0.666666666666667, 0.666666666666667, 0.5, 1, 0.833333333333333, 0.666666666666667, 0.833333333333333, 0.666666666666667), nine = c(0.307692307692308, NA, 0.461538461538462, 0.538461538461538, 1, 0.769230769230769, 0.538461538461538, 0.692307692307692, 0, 0.153846153846154, 0.769230769230769, NA, 0.461538461538462, NA, NA, NA, NA, 0, 0.615384615384615, 0.615384615384615, 0.769230769230769, 0.384615384615385, 0.846153846153846, 0.923076923076923, 0.615384615384615, 0.692307692307692, 0.0769230769230769, 0.846153846153846, 0.384615384615385, 0.384615384615385, 0.461538461538462, 0.384615384615385, 0.461538461538462, NA, 0.923076923076923, 0.692307692307692, 0.615384615384615, 0.615384615384615, 0.769230769230769, 0.0769230769230769, 0.230769230769231, 0.692307692307692, 0.769230769230769, 0.230769230769231, 0.769230769230769, 0.615384615384615), ten = c(0.875, 0.625, 0.375, 0.75, 0.75, 0.75, 0.625, 0.875, 1, 0.125, 1, NA, 0.625, 0.75, 0.75, 0.375, NA, 0.625, 0.5, 0.75, 0.875, 0.625, 0.875, 0.75, 0.625, 0.875, 0.5, 0.75, 0, 0.5, 0.875, 1, 0.75, 0.125, 0.5, 0.5, 0.5, 0.625, 0.375, 0.625, 0.625, 0.75, 0.875, 0.375, 0, 0.875), elleven = c(1, 0.8, 0.7, 0.9, 0, 1, 0.9, 0.5, 0, 0.8, 0.8, NA, 0.8, NA, NA, 0.8, NA, 0.4, 0.8, 0.5, 1, 0.4, 0.5, 0.9, 0.8, 1, 0.8, 0.5, 0.3, 0.9, 0.2, 1, 0.8, 0.1, 1, 0.8, 0.5, 0.2, 0.7, 0.8, 1, 0.9, 0.6, 0.8, 0.2, 1), twelve = c(0.666666666666667, NA, 0.133333333333333, 1, 1, 0.8, 0.4, 0.733333333333333, NA, 0.933333333333333, NA, NA, 0.6, 0.533333333333333, NA, 0.533333333333333, NA, 0, 0.6, 0.533333333333333, 0.733333333333333, 0.6, 0.733333333333333, 0.666666666666667, 0.533333333333333, 0.733333333333333, 0.466666666666667, 0.733333333333333, 1, 0.733333333333333, 0.666666666666667, 0.533333333333333, NA, 0.533333333333333, 0.6, 0.866666666666667, 0.466666666666667, 0.533333333333333, 0.333333333333333, 0.6, 0.6, 0.866666666666667, 0.666666666666667, 0.6, 0.6, 0.533333333333333)), .Names = c("id", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "elleven", "twelve"), class = "data.frame", row.names = c(NA, -46L)) iqr <- function(x, ...) { qs <- quantile(as.numeric(x), c(0.25, 0.5, 0.75), na.rm = T) names(qs) <- c("ymin", "y", "ymax") qs } magic <- function(y, ...) { high <- median(SOdata[[y]], na.rm=T)+1.5*sd(SOdata[[y]],na.rm=T) low <- median(SOdata[[y]], na.rm=T)-1.5*sd(SOdata[[y]],na.rm=T) ggplot(SOdata, aes_string(x="six", y=y))+ stat_summary(fun.data="iqr", geom="crossbar", fill="grey", alpha=0.3)+ geom_point(data = SOdata[SOdata[[y]] > high,], position=position_jitter(w=0.1, h=0),col="green", alpha=0.5)+ geom_point(data = SOdata[SOdata[[y]] < low,], position=position_jitter(w=0.1, h=0),col="red", alpha=0.5)+ stat_summary(fun.y=median, geom="point",shape=18 ,size=4, col="orange") } for (i in names(SOdata)[-c(1,7)]) { p<- magic(i) ggsave(paste("magig_plot_",i,".png",sep=""), plot=p, height=3.5, width=5.5) }

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• server for email, calendar and contacts

  - by Andreas Roth

  I'm looking for a solution like an exchange server for email, calendar, contacts, etc. I would prefer to use a open source solution. Any suggestions? The client PCs are using Mac/Unix and Windows, so the server must be accessible from all platforms. I prefer to used a non-Web-based solution, but i'm open to web-based suggestions if they provide all the needed functions (email, calendar, contacts).

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• Type-inferring a constant in C#

  - by Andreas Grech

  In C#, the following type-inference works: var s = "abcd"; But why can't the type be inferred when the variable is a constant? The following throws a compile-time exception: const var s = "abcd"; // <= Compile time error: // Implicitly-typed local variables cannot be constant

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• clicking a button via javascript does not cause a post

  - by Andreas Niedermair

  hi there! <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/jquery-ui.js"></script> </head> <body> <form id="fooForm"> <script type="text/javascript"> function FooMethod() { alert('hello'); } var fooButton; var fooForm; $(document).ready(function() { InitializeVariables(); InitiliazeDialog(); InitiliazeForm(); }); function InitializeVariables() { fooButton = $('#fooButton'); fooForm = $('#fooForm'); } function InitiliazeDialog() { var dialog = $('<div/>'); dialog.css('display', 'none'); var content = $('<p/>'); var icon = $('<span/>'); icon.addClass('ui-icon ui-icon-alert'); icon.css('float', 'left'); icon.css('margin', '0px 7px 20px 0px'); content.text('do you really want to hurt me?'); icon.prependTo(content); content.appendTo(dialog); var dialogOpenMethod = function () { dialog.dialog('open'); return false; }; var dialogOpenHandlerMethod = function (event, ui) { var widget = dialog.dialog('widget'); widget.appendTo(fooForm); var overlay = widget.prev(); overlay.css('z-index', 999); overlay.appendTo(fooForm); widget.css('position', 'fixed'); widget.css('top', '50%'); widget.css('margin-top', widget.height() / 2 * -1); widget.css('left', '50%'); widget.css('margin-left', widget.width() / 2 * -1); }; var submitMethod = function () { dialog.dialog('option', 'closeOnEscape', false); var widget = dialog.dialog('widget'); var yesButton = $(':button:eq(0)', widget); var noButton = $(':button:eq(1)', widget); var closeButton = $('a.ui-dialog-titlebar-close', widget); noButton.remove(); closeButton.remove(); fooButton.unbind('click', dialogOpenMethod); fooButton.click(); }; dialog.dialog({ autoOpen: false, modal: true, buttons: { 'Ja': submitMethod, 'Nein': function () { dialog.dialog('close'); } }, open: dialogOpenHandlerMethod }); fooButton.bind('click', dialogOpenMethod); } function InitiliazeForm() { fooButton.button(); fooForm.submit(function () { alert('doing a submit'); }); } </script> <input type="submit" id="fooButton" value="submit it!" onclick="FooMethod();"></input> </form> </body> </html> what am i doing? i want a modal-confirmation: user clicks on button, confirmation "do you really want to...?", user clicks "yes", this click unbinds the original click-handler and clicks the button again (which should cause a submit). what/why is not working? indeed you need a special case. this demo won't work, unless you set modal: false. interesting to mention: the original handler (onclick="FooMethod();") is called in modal and non-modal dialog. can anybody help me out? thanks in advance! i also opened a ticket on jqueryUI for this

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• Reading an embedded file from an ASP.NET Custom Server Control an rendering it

  - by Andreas Grech

  I currently have a file "abc.htm" in my Custom Server Control Project and it's Build Action is set to Embedded Resource. Now in the RenderContents(HtmlTextWriter output) method, I need to read that file and render it on the website. I am trying the following but it's to no avail: protected override void RenderContents(HtmlTextWriter output) { var providersURL = Page.ClientScript.GetWebResourceUrl(typeof (OpenIDSel), "OpenIDSelector.Providers.htm"); var fi = new FileInfo(providersURL); // <- exception here //the remaining code is to possibly render the file } This is an example of how the providersURL is: /WebResource.axd?d=kyU2OiYu6lwshLH4pRUCUmG-pzI4xDC1ii9u032IPWwUzMsFzFHzL3veInwslz8Y0&t=634056587753507131 FileInfo is throwing System.ArgumentException: Illegal characters in path.

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• How to structure a database with questions and answers?

  - by Andreas Johannessen

  Hi I am going to make a simple application that uses a database. I could need some guidance on how to structure it. I shall make question program. What I have in mind is. One table with questions One table with the difficulity of the question One table with the category of the question However, what do I do with the answers? Have them as seperate columns in the question-table? It sounds like a bad practice.(Also, where do I have the correct answer) Each question will have 5 answers where only one of them is correct.

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• EXC_BAD_ACCESS with NSUserdefaults on iphone.

  - by Andreas Johannessen

  I have the following code in my ApplicationDelegate. My deployment target is 3.0 and upwards, however I get a EXC_BAD_ACCESS when I launch the app with the following code on my iPhone with 3.1.3, however on the simulator which has 4.2 it runs fine. I would really appriciate help on this one, thanks in advance. When I comment this block when I deploy to 3.1.3 device it runs without bad access. + (void)initialize { NSString *path = [[NSBundle mainBundle] bundlePath]; NSString *pListPath = [path stringByAppendingPathComponent:@"Settings.bundle/Root.plist"]; NSDictionary *pList = [NSDictionary dictionaryWithContentsOfFile:pListPath]; NSMutableArray *prefsArray = [pList objectForKey:@"PreferenceSpecifiers"]; NSMutableDictionary *regDictionary = [NSMutableDictionary dictionary]; for (NSDictionary *dict in prefsArray) { NSString *key = [dict objectForKey:@"Key"]; if(key) { id value = [dict objectForKey:@"DefaultValue"]; [regDictionary setObject:value forKey:key]; } } [[NSUserDefaults standardUserDefaults] registerDefaults:regDictionary]; } UPDATE: I traced the error to happen on this line: [[NSUserDefaults standardUserDefaults] registerDefaults:regDictionary]; So there is probaly another syntax on earlier iOS, or am I wrong?

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• ALTER TABLE my_table ADD @column INT

  - by Andreas

  If i want to use a variable as name of the new column, is this posiblem in MS SQL? Example that dont work: ALTER TABLE my_table ADD @column INT

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• converting a treebank of vertical trees to s-expressions

  - by Andreas

  I need to preprocess a treebank corpus of sentences with parse trees. The input format is a vertical representation of trees, like so: S =NP ==(DT +def) the == (N +ani) man =VP ==V walks ...and I need it like: (S (NP (DT the) (N man)) (VP (V walks))) I have code that almost does it, but not quite. There's always a missing paren somewhere. Should I use a proper parser, maybe a CFG? The current code is at http://github.com/andreasvc/eodop/blob/master/arbobanko.py The code also contains real examples from the treebank.

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• Any way to install Visual Studio 2008 hotfixes automatically?

  - by Andreas Roth

  There are several hot fixes for VS 2008 sp1, but it's a mess to install them all manually one by one. Is there some kind of Visual Studio Updater, which installs all the necessary hot fixes automatically?

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• Changing background color on UIScrollView?

  - by Andreas Johannessen

  Hi How do I change the black/gray color to white? This is just a simple view with a UIView attached to the UIViewControllers property together a with a webview that fills the UIView. UPDATE Here's the code that works: - (void)loadView { UIWebView *webview = [[UIWebView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 416.0f)]; [webView setBackgroundColor:[UIColor whiteColor]]; self.view = webView; [webview release]; } Thanks in advance.

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• How to load an RSA key from binary data to an RSA structure using the OpenSSL C Library?

  - by Andreas Bonini

  Currently I have my private key saved in a file, private.key, and I use the following function to load it: RSA *r = PEM_read_RSAPrivateKey("private.key", NULL, NULL, NULL); This works perfectly but I'm not happy with the file-based format; I want to save my key in pure binary form (ie, no base64 or similar) in a char* variable and load/save the key from/to it. This way I have much more freedom: I'll be able to store the key directly into the application const char key[] { 0x01, 0x02, ... };, send it over a network socket, etc. Unfortunately though I haven't found a way to do that. The only way to save and load a key I know of reads/saves it to a file directly.

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• Execute javascript in PHP

  - by Andreas Bonini

  I'm generating your typical Web 2.0 HTML page with PHP: it contains a lot of <script> tags and javascript code that will substantially change the DOM after the load event. Is there a way to get the final HTML code directly from PHP, without opening the page with any browser? For example, let's say the HTML for the page is (it's just an example): <html> <head> <script>...the jquery library code...</script> <script>$(document).ready(function() { $("body").append("<p>Hi!</p>");</script> </head> <body> </body> </html> This HTML is saved in the $html PHP variable. Now, I want to pass that variable to some function that will return $result = <html>....<body><p>Hi!</p></body></html>. Is this possible?

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• add several variables to dataframe, based on vector

  - by Andreas

  I am sure this is easy - but I can't figure it out right now. Basically: I have a long vector of variables: names <- c("first","second", "third") I have some data, and I now need to add the variables. I could do: data$first <- NA But since I have a long list, and I would like an automated solution. This doesn't work. for (i in 1:length(names)) (paste("data$", names[i],sep="") <- NA) The reason I want this, is that I need to vertically merge to dataframes, where one doesn't have all the variables it should have. Thanks in advance

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• SQL statement HAVING MAX(some+thing)=some+thing

  - by Andreas

  I'm having trouble with Microsoft Access 2003, it's complaining about this statement: select cardnr from change where year(date)<2009 group by cardnr having max(time+date) = (time+date) and cardto='VIP' What I want to do is, for every distinct cardnr in the table change, to find the row with the latest (time+date) that is before year 2009, and then just select the rows with cardto='VIP'. This validator says it's OK, Access says it's not OK. This is the message I get: "you tried to execute a query that does not include the specified expression 'max(time+date)=time+date and cardto='VIP' and cardnr=' as part of an aggregate function." Could someone please explain what I'm doing wrong and the right way to do it? Thanks

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• hg access control

  - by andreas buykx

  Me and a couple of colleagues are starting to use mercurial, and we want to have a shared repository that would contain our QC-ed changes. Each of the developers hg clones the repository and pushes his changes back to the shared repository. I've read the HG init tutorial and skimmed through the red bean book, but could not find how to control who is allowed to push changes to the shared repository. Can someone tell me how to set up a hg repository such that it only allows specified users (by unix userids) to push changes?

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• Strangest language feature

  - by Andreas Bonini

  What is, in your opinion, the most surprising, weird, strange or really "WTF" language feature you have encountered? Please only one feature per answer.

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• ScriptManager duplicates javascript

  - by Andreas

  Hi! I have a usercontrol that can be used in for example a gridview itemtemplate, this means that the control might or might not be on the page at page load. In the case where the control is inside an itemtemplate i will popupate the gridview via asyncronous postbacks (via updatepanels). The control itselfs registrers scriptblocks since it is depending on javascripts. First i used Page.ClientScript.RegistrerClientScriptBlock But this doesn't work on asyncronous postbacks (updatepanels) so i then tried the same using ScriptManager which allows me to registrer scripts on the page after async postbacks. great!. ScriptManager.RegisterClientScriptBlock However, ScriptManager (what i know of) does not have the functionallity to see if a script already is on the page, so i will for every postback generate duplicates of the script blocks, this is ofcourse unwanted behaviour. I did a run at Google and found that i can call the Dispose() method of the PageRequestManager can be used, this does work since it clears the scripts and then adding them again (this also solves my issue with removing unused script blocks from removed controls). Sys.WebForms.PageRequestManager.getInstance().Dispose() However, ofcourse there is a downside since im posting here :). The Dispose() method disposes the instance on the master page as well which leads to scripts running there will stop to function after an async postback (updateprogress for example). So, is there a way to check if a script already exists on the page using ScriptManager or any other tools, that will prevent me of inserting duplicate scripts? Also, is there a way to remove certain script blocks (when i am removing an item in itemtemplate for example). Big thanks in advance.

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• clicking a button via javascript does not cause a postback

  - by Andreas Niedermair

  hi there! <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/jquery-ui.js"></script> </head> <body> <form id="fooForm"> <script type="text/javascript"> function FooMethod() { alert('hello'); } var fooButton; var fooForm; $(document).ready(function() { InitializeVariables(); InitiliazeDialog(); InitiliazeForm(); }); function InitializeVariables() { fooButton = $('#fooButton'); fooForm = $('#fooForm'); } function InitiliazeDialog() { var dialog = $('<div/>'); dialog.css('display', 'none'); var content = $('<p/>'); var icon = $('<span/>'); icon.addClass('ui-icon ui-icon-alert'); icon.css('float', 'left'); icon.css('margin', '0px 7px 20px 0px'); content.text('do you really want to hurt me?'); icon.prependTo(content); content.appendTo(dialog); var dialogOpenMethod = function () { dialog.dialog('open'); return false; }; var dialogOpenHandlerMethod = function (event, ui) { var widget = dialog.dialog('widget'); widget.appendTo(fooForm); var overlay = widget.prev(); overlay.css('z-index', 999); overlay.appendTo(fooForm); widget.css('position', 'fixed'); widget.css('top', '50%'); widget.css('margin-top', widget.height() / 2 * -1); widget.css('left', '50%'); widget.css('margin-left', widget.width() / 2 * -1); }; var submitMethod = function () { dialog.dialog('option', 'closeOnEscape', false); var widget = dialog.dialog('widget'); var yesButton = $(':button:eq(0)', widget); var noButton = $(':button:eq(1)', widget); var closeButton = $('a.ui-dialog-titlebar-close', widget); noButton.remove(); closeButton.remove(); fooButton.unbind('click', dialogOpenMethod); fooButton.click(); }; dialog.dialog({ autoOpen: false, modal: true, buttons: { 'Ja': submitMethod, 'Nein': function () { dialog.dialog('close'); } }, open: dialogOpenHandlerMethod }); fooButton.bind('click', dialogOpenMethod); } function InitiliazeForm() { fooButton.button(); fooForm.submit(function () { alert('doing a submit'); }); } </script> <input type="submit" id="fooButton" value="submit it!" onclick="FooMethod();"></input> </form> </body> </html> what am i doing? i want a modal-confirmation: user clicks on button, confirmation "do you really want to...?", user clicks "yes", this click unbinds the original click-handler and clicks the button again (which should cause a submit). what/why is not working? indeed you need a special case. this demo won't work, unless you set modal: false. interesting to mention: the original handler (onclick="FooMethod();") is called in modal and non-modal dialog. can anybody help me out? thanks in advance!

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• Catching errors in ANTLR and finding parent

  - by Andreas

  I have found out that I can catch errors during parsing by overwriting displayRecognitionError, but how do I find the parent "node" of this error? ex. if I have the grammar: prog: stat expr; stat: STRING; expr: INTEGER; And give it the input "abc def". Then I will get an error at "def" which should be an integer. At this point I then want to get the parent which is "expr" (since it fails inside the INTEGER part) and it's parent "prog". Kind of like printing stack trace in java. I tried to look at the node from RecognitionException parsed to displayRecognitionError, but it is null, and using CommonErrorNode the parent is null. Should I maybe take a completely different approach?

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• for (i in xxx) ggplot problem

  - by Andreas

  This is strange - I think? library(ggplot2) tf <- which(sapply(diamonds, is.factor)) diamonds.tf <- diamonds[,tf] So far so good. But next comes the trouble: pl.f <- ggplot(diamonds.tf, aes(x=diamonds.tf[,i]))+ geom_bar()+ xlab(names(diamonds.tf[i])) for (i in 1:ncol(diamonds.tf)) { ggsave(paste("plot.f",i,".png",sep=""), plot=pl.f, height=3.5, width=5.5) } This saves the plots in my working directory - but with the wrong x-label. I think this is strange since calling ggplot directly produces the right plot: i <- 2 ggplot(diamonds, aes(x=diamonds[,i]))+geom_bar()+xlab(names(diamonds)[i]) I don't really know how to describe this as a fitting title - suggestions as to a more descriptive question-title is most welcome. Thanks in advance

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• Internet Explorer 8 + Deflate

  - by Andreas Bonini

  I have a very weird problem.. I really do hope someone has an answer because I wouldn't know where else to ask. I am writing a cgi application in C++ which is executed by Apache and outputs HTML code. I am compressing the HTML output myself - from within my C++ application - since my web host doesn't support mod_deflate for some reason. I tested this with Firefox 2, Firefox 3, Opera 9, Opera 10, Google Chrome, Safari, IE6, IE7, IE8, even wget.. It works with ANYTHING except IE8. IE8 just says "Internet Explorer cannot display the webpage", with no information whatsoever. I know it's because of the compression only because it works if I disable it. Do you know what I'm doing wrong? I use zlib to compress it, and the exact code is: /* Compress it */ int compressed_output_size = content.length() + (content.length() * 0.2) + 16; char *compressed_output = (char *)Alloc(compressed_output_size); int compressed_output_length; Compress(compressed_output, compressed_output_size, (void *)content.c_str(), content.length(), &compressed_output_length); /* Send the compressed header */ cout << "Content-Encoding: deflate\r\n"; cout << boost::format("Content-Length: %d\r\n") % compressed_output_length; cgiHeaderContentType("text/html"); cout.write(compressed_output, compressed_output_length); static void Compress(void *to, size_t to_size, void *from, size_t from_size, int *final_size) { int ret; z_stream stream; stream.zalloc = Z_NULL; stream.zfree = Z_NULL; stream.opaque = Z_NULL; if ((ret = deflateInit(&stream, CompressionSpeed)) != Z_OK) COMPRESSION_ERROR("deflateInit() failed: %d", ret); stream.next_out = (Bytef *)to; stream.avail_out = (uInt)to_size; stream.next_in = (Bytef *)from; stream.avail_in = (uInt)from_size; if ((ret = deflate(&stream, Z_NO_FLUSH)) != Z_OK) COMPRESSION_ERROR("deflate() failed: %d", ret); if (stream.avail_in != 0) COMPRESSION_ERROR("stream.avail_in is not 0 (it's %d)", stream.avail_in); if ((ret = deflate(&stream, Z_FINISH)) != Z_STREAM_END) COMPRESSION_ERROR("deflate() failed: %d", ret); if ((ret = deflateEnd(&stream)) != Z_OK) COMPRESSION_ERROR("deflateEnd() failed: %d", ret); if (final_size) *final_size = stream.total_out; return; }

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• tomcat session replication without multicast

  - by Andreas Petersson

  i am planning to use 2 dedicated root servers rented at a hosting provider. those machines will run tomcat 6 in a cluster. if i will add additional machines later on - it is unlikely that they will be accessible with multicast, because they will be located in different subnets. is it possible to run tomcat without multicast? all tutorials for tomcat 6 clustering include multicast heartbeat. are there any alternatives to SimpleTcpCluster? or are other alternatives more appropriate in this situation?

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• transferring subversion changes between linux and windows

  - by andreas buykx

  Hi all, What is the best way to transfer changes that include new and deleted directories and/or new and deleted (actually moved) files in those directories from a subversion repository on linux to windows? I do my developments on linux using a subversion repository, but I have to test my changes on windows as well. My windows machine has a tortoisesvn repository which I tried to patch with a svn diff output. This failed miserably since my patch contains a renamed (i.e. deleted and added under a different name) directory, a new directory and the files in there. Do I do things wrong by just applying the svn diff output as a patch in tortoisesvn? For now I think that my best option is to have the windows tree on the same svn version as the linux tree and just copy the entire changed directory over the existing directory. Would that work?

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