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• HttpError 502 with Google Wave Active Robot API fetch_wavelet()

  - by Drew LeSueur

  I am trying to use the Google Wave Active Robot API fetch_wavelet() and I get an HTTP 502 error example: from waveapi import robot import passwords robot = robot.Robot('gae-run', 'http://images.com/fake-image.jpg') robot.setup_oauth(passwords.CONSUMER_KEY, passwords.CONSUMER_SECRET, server_rpc_base='http://www-opensocial.googleusercontent.com/api/rpc') wavelet = robot.fetch_wavelet('googlewave.com!w+dtuZi6t3C','googlewave.com!conv+root') robot.submit(wavelet) self.response.out.write(wavelet.creator) But the error I get is this: Traceback (most recent call last): File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 511, in __call__ handler.get(*groups) File "/base/data/home/apps/clstff/gae-run.342467577023864664/main.py", line 23, in get robot.submit(wavelet) File "/base/data/home/apps/clstff/gae-run.342467577023864664/waveapi/robot.py", line 486, in submit res = self.make_rpc(pending) File "/base/data/home/apps/clstff/gae-run.342467577023864664/waveapi/robot.py", line 251, in make_rpc raise IOError('HttpError ' + str(code)) IOError: HttpError 502 Any ideas? Edit: When [email protected] is not a member of the wave I get the correct error message Error: RPC Error500: internalError: [email protected] is not a participant of wave id: [WaveId:googlewave.com!w+Pq1HgvssD] wavelet id: [WaveletId:googlewave.com!conv+root]. Unable to apply operation: {'method':'robot.fetchWave','id':'655720','waveId':'googlewave.com!w+Pq1HgvssD','waveletId':'googlewave.com!conv+root','blipId':'null','parameters':{}} But when [email protected] is a member of the wave I get the http 502 error. IOError: HttpError 502

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• Selenium RC: how to capture/handle error?

  - by KenBurnsFan1

  Hi, My test uses Selenium to loop through a CSV list of URLs via an HTTP proxy (working script below). As I watch the script run I can see about 10% of the calls produce "Proxy error: 502" ("Bad_Gateway"); however, the errors are not captured by my catch-all "except Exception" clause -- ie: instead of writing 'error' in the appropriate row of the "output.csv", they get passed to the else clause and produce a short piece of html that starts: "Proxy error: 502 Read from server failed: Unknown error." Also, if I collect all the URLs which returned 502s and re-run the script, they all pass, which leads me to believe that this is a sporadic network path issue. Question: Can the script be made to recognize the the 502 errors, sleep a minute, and then retry the URL instead of moving on to the next URL in the list? The only alternative that I can think of is to apply re.search("Proxy error: 502") after "get_html_source" as a way to catch the bad calls. Then, if the RE matches, put the script to sleep for a minute and then retry 'sel.open(row[0]' on the URL which produced the 502. Any advice would be much appreciated. Thanks! #python 2.6 from selenium import selenium import unittest, time, re, csv, logging class Untitled(unittest.TestCase): def setUp(self): self.verificationErrors = [] self.selenium = selenium("localhost", 4444, "*firefox", "http://baseDomain.com") self.selenium.start() self.selenium.set_timeout("60000") def test_untitled(self): sel = self.selenium spamReader = csv.reader(open('ListOfSubDomains.csv', 'rb')) for row in spamReader: try: sel.open(row[0]) except Exception: ofile = open('output.csv', 'ab') ofile.write("error" + '\n') ofile.close() else: time.sleep(5) html = sel.get_html_source() ofile = open('output.csv', 'ab') ofile.write(html.encode('utf-8') + '\n') ofile.close() def tearDown(self): self.selenium.stop() self.assertEqual([], self.verificationErrors) if __name__ == "__main__": unittest.main()

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• ASP.NET: Custom MembershipProvider with a custom user table

  - by blahblah

  I've recently started tinkering with ASP.NET MVC, but this question should apply to classic ASP.NET as well. For what it's worth, I don't know very much about forms authentication and membership providers either. I'm trying to write my own MembershipProvider which will be connected to my own custom user table in my database. My user table contains all of the basic user information such as usernames, passwords, password salts, e-mail addresses and so on, but also information such as first name, last name and country of residence. As far as I understand, the standard way of doing this in ASP.NET is to create a user table without the extra information and then a "profile" table with the extra information. However, this doesn't sound very good to me, because whenever I need to access that extra information I would have to make one extra database query to get it. I read in the book "Pro ASP.NET 3.5 in C# 2008" that having a separate table for the profiles is not a very good idea if you need to access the profile table a lot and have many different pages in your website. Now for the problem at hand... As I said, I'm writing my own custom MembershipProvider subclass and it's going pretty well so far, but now I've come to realize that the CreateUser doesn't allow me to create users in the way I'd like. The method only takes a fixed number of arguments and first name, last name and country of residence are not part of them. So how would I create an entry for the new user in my custom table without this information at hand in CreateUser of my MembershipProvider?

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• CSS box shadow on container div causes scrollbars

  - by kaile

  I have a website with the following setup: <div id="container"> <div id="header"></div> <div id="content"></div> <div id="clearfooter"></div> </div> <div id="footer"></div> I use the clearfooter and a footer outside the container to keep the footer at the bottom of the page when there isn't enough content. My problem is that I would like to apply a box shadow on the container div in the following way: #container {width:960px; min-height:100%; margin:0px auto -32px auto; position:relative; padding:0px; background-color:#e6e6e6; -moz-box-shadow: -3px 0px 5px rgba(0,0,0,.8), 3px 0px 5px rgba(0,0,0,.8);} #header {height:106px; position:relative;} #content {margin:0px; padding:10px 30px 10px 30px; position:relative;} #clearFooter {height:32px; clear:both; display:block; padding:0px; margin:0px;} #footer {height:32px; padding:0px; position:relative; width:960px; margin:0px auto 0px auto;} As you can see its a drop shadow on on each side of the container div. However, in doing this, when the content doesn't take up the full height, there are still scroll bars caused by the shadow pushing past the bottom of the footer due to the blur. Is there some way of preventing the shadow from going past the edge of the container div and causing a scrollbar? Thanks for your help!

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• jquery select elements between two elements that are not siblings

  - by naugtur

  eg. [I've removed attributes, but it's a bit of auto-generated html] <img class="p"/> <div> hello world <p> <font><font size="2">text.<img class="p"/> some text</font></font> </p> <img class="p"/> <p> <font><font size="2">more text<img class="p"/> another piece of text </font></font> </p><img class="p"/> some text on the end </div> I need to apply some highlighting with backgrounds to all text that is between two closest [in the html code] img.p elements when hovering first of them. I have no idea how to do that. Lets say I hover the first img.p - it should highlight hello world and text. and nothing else. And now the worst part - I need the backgrounds to disappear on mouseleave. I need it to work with any HTML mess possible. The above is just an example and structure of the documents will differ. [tip. Processing the whole html before binding hover and putting some spans etc. is ok as long as it doesn't change the looks of the output document]

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• DIY intellisense on XPath - design approach? (WinForms app)

  - by Cheeso

  I read the DIY Intellisense article on code project, which was referenced from the Mimic Intellisense? question here on SO. I wanna do something similar, DIY intellisense, but for XPath not C#. The design approach used there makes sense to me: maintain a tree of terms, and when the "completion character" is pressed, in the case of C#, a dot, pop up the list of possible completions in a textfield. Then allow the user to select a term from the textfield either through typing, arrow keys, or double-click. How would you apply this to XPath autocompletion? should there be an autocomplete key? In XPath there is no obvious separator key like "dot" in C#. should the popup be triggered explicitly in some other way, let's say ctrl-. ? or should the parser try to autocomplete continuously? If I do the autocomplete continuously, how to scale it properly? There are 93 xpath functions, not counting overloads. I certainly don't want to popup a list of 93 choices. How do I decide when I've narrowed it enough to offer a useful lsit of possible completions? How to populate the tree of possible completions? For C#, it's easy: walk the type space via reflection. At a first level, the "syntax tree" for C# seems like a single tree, and the list of completions at any point depends on the graph of nodes you've traversed to that point. Typing System.Console. traverses to a certain node in that tree, and the list of completions is the set of child nodes available at that node in the tree. On the other hand, the xpath syntax seems like it is a "flatter" tree - function names, axis names, literals. Does this make sense? what have I not considered?

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• Run-time error'9' subscript out of range

  - by Chris

  The error occurs when I rename the file. I need to be able to the macro automatically recognise the change in the file name and apply it to the macro. Is there any way to do this without having to manually change it each time which will no work for what I need this to do Sub OccurenceSort() ' ' OccurenceSort Macro ' Macro recorded 4/9/2010 by Chris Greenlee ' ' Keyboard Shortcut: Ctrl+o ' Sheets("Occurences").Select Range("A1:D58").Select Range("D58").Activate Selection.Sort Key1:=Range("B2"), Order1:=xlDescending, Header:=xlGuess, _ OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom Sheets("Chart").Select ActiveSheet.ChartObjects("Chart 1").Activate ActiveChart.PlotArea.Select ActiveChart.ChartArea.Select ActiveChart.SeriesCollection(1).Values = "=Occurences!R2C2:R12C2" End Sub Sub OccurenceByValue() ' ' OccurenceByValue Macro ' Macro recorded 4/9/2010 by Chris Greenlee ' ' Keyboard Shortcut: Ctrl+v ' ActiveWindow.Visible = False Windows("QA Project - Automated Charts v1.1.xls").Activate Sheets("Occurences").Select Range("A1:D58").Select Range("D58").Activate Selection.Sort Key1:=Range("C2"), Order1:=xlDescending, Header:=xlGuess, _ OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom Sheets("Chart").Select ActiveSheet.ChartObjects("Chart 1").Activate ActiveChart.SeriesCollection(1).Values = "=Occurences!R2C3:R12C3" End Sub Sub OccurencesByPercentIncreaseToScore() ' ' OccurencesByPercentIncreaseToScore Macro ' Macro recorded 4/9/2010 by Chris Greenlee ' ' Keyboard Shortcut: Ctrl+p ' ActiveWindow.Visible = False Windows("QA Project - Automated Charts v1.1.xls").Activate Sheets("Occurences").Select Range("A1:D58").Select Range("D58").Activate Selection.Sort Key1:=Range("D2"), Order1:=xlDescending, Header:=xlGuess, _ OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom Sheets("Chart").Select ActiveSheet.ChartObjects("Chart 1").Activate ActiveChart.SeriesCollection(1).Values = "=Occurences!R2C4:R12C4" End Sub The problem occurs with this line Windows("QA Project - Automated Charts v1.1.xls").Activate

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• CSS3 Gradients and border-radius leading to extraneous background in webkit

  - by iamfriendly

  Hello all, After my 1st question with relation to CSS3 gradients in which I was recreating an 'inner glow' I've now got to the point where I'm not so happy with the way in which webkit renders the effect. Basically, if you give an element a background colour and apply a border radius to it, webkit lets the background colour "bleed" out to fill the surrounding box (making it look a bit awful) To reproduce the undesirable effect, try something like the following section#featured footer p a { color: rgb(255,255,255); text-shadow: 1px 1px 1px rgba(0,0,0,0.6); text-decoration: none; padding: 5px 10px; border-radius: 15px; -moz-border-radius: 15px; -webkit-border-radius: 15px; background: rgb(98,99,100); -moz-box-shadow: inset 0 0 8px rgba(0,0,0, 0.25); -webkit-box-shadow: inset 0 0 8px rgba(0,0,0, 0.25); } You can see an example of this here: http://iamfriendly.clients.friendlygp.com/ Apparently this appears to be a Windows-only problem, so for those on a Mac, here's a screenshot: (Check the 'carry on reading' button) You'll notice that in Safari/Chrome (the latest available public downloads as well as the latest nightlies as far as I can tell), you get a rather ugly background colour bleed. However, in Firefox, you should be able to see what I'm after. If you're in Internet Explorer, woe betide you. Does anyone know of a technique which will allow me to produce the 'correct' effect? Is there a CSS Property which I've missed that tells webkit to only have the background within the border-radius'd part of the containing box. I could potentially use an image, but I'm really trying to avoid it. Naturally, as we're dealing with CSS3 and the landscape is continually changing, I might just have to 'lump' it and revert to an image. However, if anyone can suggest an alternative I would be very much appreciative!

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• mercurial: how to synchronize mq patches from a master repo as mq patches to a set of clone repos

  - by dim

  I have to run a dozen of different build tests on a code base maintained in a mercurial repository. I don't want to run serially these tests on same repository because they modify a set of common files and I want to run them in parallel on different machines. Also, after all tests are run I want to have access to latest test results from those test work areas. Currently I'm cloning the master repository a dozen of times and run in each clone one different test. Before each test execution I do a pull/update/purge preparation sequence in order to start the test on latest clean state. That's good for me. I'm also preparing new changes using mq extension that I would test on all clones as above before committing them. For testing some ready candidate mq patches I want somehow to deploy/synchronize them to be available in test clones and apply those ready for testing using some guard before running the test. Did anybody do this synchronization before? What's the most simple way to do it? Do I need to have versioned mq patches for that?

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• Window Installer custom action BEFORE any validation

  - by Marc

  I wrote a Windows Installer custom action based on the tutorial found here: http://www.codeproject.com/kb/install/msicustomaction.aspx My custom action is killing a background process of a given name which could still be opened by the user. The reason is that I don't want users to see the warning that a given EXE is running and must be closed so that setup can continue. This works fine when the MSI passes through the UI sequence as the action is created in "InstallUISequence" table like in the tutorial. However, when the MSI is used silently (right-click and select repair or uninstall), then my custom action isn't executed of course. Where do I have to put my custom action so that it is executed immediately also when run silently? I tried adding it to "InstallExecuteSequence", but the 'app running' warning is still shown. I then tried lowering the sequence number of my custom action to 5, but this also didn't help. Note: I'm using Orca to modify an MSI generated from a Visual Studio setup project. I'm then using the transform file to apply it.

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• Issue with clipping rectangles and back to front rendering

  - by Milo

  Here is my problem. My rendering algorithm renders from back to front. But logically, clipping rectangles need to be applied from front to back. Hence why the following does not work: void AguiWidgetManager::recursiveRender(const AguiWidget *root) { //recursively calls itself to render widgets from back to front AguiWidget* nonConstRoot = (AguiWidget*)root; if(!nonConstRoot->isVisable()) { return; } //push the clipping rectangle if(nonConstRoot->isClippingChildren()) { graphicsContext->pushClippingRect(nonConstRoot->getClippingRectangle()); } if(nonConstRoot->isEnabled()) { nonConstRoot->paint(AguiPaintEventArgs(true,graphicsContext)); for(std::vector<AguiWidget*>::const_iterator it = root->getPrivateChildBeginIterator(); it != root->getPrivateChildEndIterator(); ++it) { recursiveRender(*it); } for(std::vector<AguiWidget*>::const_iterator it = root->getChildBeginIterator(); it != root->getChildEndIterator(); ++it) { recursiveRender(*it); } } else { nonConstRoot->paint(AguiPaintEventArgs(false,graphicsContext)); for(std::vector<AguiWidget*>::const_iterator it = root->getPrivateChildBeginIterator(); it != root->getPrivateChildEndIterator(); ++it) { recursiveRenderDisabled(*it); } for(std::vector<AguiWidget*>::const_iterator it = root->getChildBeginIterator(); it != root->getChildEndIterator(); ++it) { recursiveRenderDisabled(*it); } } //release clipping rectangle if(nonConstRoot->isClippingChildren()) { graphicsContext->popClippingRect(); } } I could ofcourse go to the top of the tree, then apply clipping rectangles inward until I get to the currently rendered widget, but that would involve lots of clipping rectangles @ 60 frames per second. I want to minimize calls to pushing and popping rectangles. What could I do, Thanks

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• HTML & CSS Horizontal menu with items on left & right

  - by Fabian Vilers

  Hi all, I'm building an horizontal menu in html+css. The current result is fine, except I want to have some items on the left, and others on the right. I couldn't find usefull result on Google with such common keywords so I'm asking on SO. Here's my code so far: #menu { background-color: #383838; height: 65px; margin-bottom: 20px; } #menu ul li { float: left; } <div id="menu"> <ul> <li>Link 1</li> <li>Link 2</li> <li>Link 3</li> </ul> </div> I'd like to have Link 3 on the right, so the space between link 2 and 3 should be filled at maximum. I don't want a filler <li> tag, but instead apply a class to the last <li> on the left, or the first <li> on the right. Don't want to adjust the width as I've a :hover background color changing effet on the links. I suppose margin or padding should do the trick but I can't manage to find how. Any clue? Thanks in advance, Fabian

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• HTML5 Canvas: How to make a loading spinner by rotating the image in degrees?

  - by Bill

  I am making a loading spinner with html5 canvas. I have my graphic on the canvas but when i rotate it the image rotates off the canvas. How do I tell it to spin the graphic on its center point? <!DOCTYPE html> <html> <head> <title>Canvas test</title> <script type="text/javascript"> window.onload = function() { var drawingCanvas = document.getElementById('myDrawing'); // Check the element is in the DOM and the browser supports canvas if(drawingCanvas && drawingCanvas.getContext) { // Initaliase a 2-dimensional drawing context var context = drawingCanvas.getContext('2d'); //Load the image object in JS, then apply to canvas onload var myImage = new Image(); myImage.onload = function() { context.drawImage(myImage, 0, 0, 27, 27); } myImage.src = "img/loading.png"; context.rotate(45); } } </script> </head> <body> <canvas id="myDrawing" width="27" height="27"> </canvas> </body> </html>

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• jEditable - how do I get the edited textfield variable?

  - by Forkrul Assail

  I have a table that I use jEditable with. Saving to the server works, but the callback for refreshing my table element (that I just edited and saved to the server) does not work. /* Apply the jEditable handlers to the table */ $('#example tbody td').editable( '<%= url_for :controller => 'impact_matrix', :action => 'post', :scenario => params[:id] %>', { "callback": function( sValue, y ) { ^ goes missing var aPos = oTable.fnGetPosition( this ); oTable.fnUpdate( sValue, aPos[0], aPos[1] ); }, "submitdata": function ( value, settings ) { temp = value return { "row_id": this.parentNode.getAttribute('id') }; }, sValue (that I point to in the code) - seems to be blank. I do get values for aPos[0] and aPos[1], but not sValue. Could someone please explain to me 'what triggers the callback function?' Or, if I could just see where to get the 'newly edited text' and then just run fnUpdate() on that, I'd be fine. Thanks in advance for your help.

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• Rails: constraint violation on create but not on update

  - by justinbach

  Note: This is a "railsier" (and more succinct) version of this question, which was getting a little long. I'm getting Rails behavior on a production server that I can't replicate on the development server. The codebases are identical save for credentials and caching settings, and both are powered by Oracle 10g databases with identical schema (but different data). My Rails application contains a user model, which has_one registration; registration in turn has_and_belongs_to_many company_ownerships through a registration_ownerships table. Upon registering, users fill out data pertinent to all three models, including a series of checkboxes indicating what registration_ownerships might apply to their account. On the dev server, the registration process is seamless, no matter what data is entered. On production, however, if users check off any of the company ownership fields before submitting their registration, Oracle complains about a constraint violation on the primary key of the company_ownerships table (which is a two-field key based on company_ownership_id and registration_id) and users get the standard Rails 500 error screen. In every case, I've verified that no conflicting record on these two fields exists in the production database, so I don't know why the constraint is getting violated. To further confuse things, if a user registers without listing any ownerships and later goes back and modifies their account to reflect ownership data (which is done through the same interface), the application happily complies with their request and Oracle is well-behaved (this is both on production and dev). I've spent the past couple days trying to figure out what might be causing this problem and am reaching the end of my wits. Any advice would be greatly appreciated!

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• Looking for merge tool with very good in-line-comparison support

  - by peter p

  I have seen this topic discussed several times, but emphasis is on "very good in-line-comparison" here, which was not really covered by those threads. E.g. I would like the tool to recognize and highlight that the resource "colorpicker_newstring" has been added when comparing the following two blocks. WinMerge and Kdiff both fail... Does anyone know a software that does not? I am using Windows. Ah, and I'd prefer free/OS software, of course. Thanks a lot in advance, Peter File A: <resource name="colorpicker_title">Color picker</resource> <resource name="colorpicker_apply">Apply</resource> <resource name="colorpicker_transparent">Transparent</resource> <resource name="colorpicker_htmlcolor">HTML color</resource> <resource name="colorpicker_red">Red</resource> <resource name="colorpicker_newstring">New String</resource> <resource name="colorpicker_green">Green</resource> <resource name="colorpicker_blue">Blue</resource> <resource name="colorpicker_alpha">Alpha</resource> <resource name="colorpicker_recentcolors">Recently used colors</resource> File B: <resource name="colorpicker_title">Sélecteur de couleur</resource> <resource name="colorpicker_apply">Appliquer</resource> <resource name="colorpicker_transparent">Transparent</resource> <resource name="colorpicker_htmlcolor">Couleur HTML</resource> <resource name="colorpicker_red">Rouge</resource> <resource name="colorpicker_green">Vert</resource> <resource name="colorpicker_blue">Bleu</resource> <resource name="colorpicker_alpha">Alpha</resource> <resource name="colorpicker_recentcolors">Couleurs récentes</resource>

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• vb.net, How can I limit a textchanged event for a textbox to keyboard input only?

  - by Luay

  Hi everyone, Please allow me to explain what I have and what I am trying to achieve. I have a textbox (called txtb1) and a button under it (called btn_browse) on a winform in a vb.net project. When the user clicks the button a folder browser dialog appears. The user selects his desired folder and when he/she clicks 'ok' the dialog closes and the path of the folder selected appears in the textbox. I also want to store that value in a variable to be used somewhere else(the value will be copied to an xml file when the user clicks 'apply' on the form, but this has no effect nor is related to my problem). To achieve that I have the following code: Public myVar As String Private Sub btn_browse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_browse.Click Dim f As New FolderBrowserDialog If f.ShowDialog() = DialogResult.OK Then txtb1.Text = f.SelectedPath End If myVar = txtb1.text f.Dispose() End Sub This part works with no problems. Now, what if the user either: 1- decides to enter the path manually rather than use the browse button. or, 2- after using the browse button and selecting the folder they decide to manually change the location In trying to solve this I added a textchanged event to the textbox as follows: Private Sub txtb1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtb1.TextChanged myVar = txtb1.Text End Sub However, this is not working. Apparently, and I don't know if this is relevant, when the user selects the desired folder using the browse button the textchanged event is also triggered. and when I click on the textbox (to give it focus) and press any keyboard key the application simply stops responding. So my questions are: am I going about this the right way? if my logic is flawed, could someone point me to how usually such a thing could be achieved? is it possible to limit the triggering events to only keyboard input as a way around this? I tried the keydown and keypress events but I am getting the freeze. I would be grateful for your help. Thanks

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• Which languages support *recursive* function literals / anonymous functions?

  - by Hugh Allen

  It seems quite a few mainstream languages support function literals these days. They are also called anonymous functions, but I don't care if they have a name. The important thing is that a function literal is an expression which yields a function which hasn't already been defined elsewhere, so for example in C, &printf doesn't count. EDIT to add: if you have a genuine function literal expression <exp>, you should be able to pass it to a function f(<exp>) or immediately apply it to an argument, ie. <exp>(5). I'm curious which languages let you write function literals which are recursive. Wikipedia's "anonymous recursion" article doesn't give any programming examples. Let's use the recursive factorial function as the example. Here are the ones I know: JavaScript / ECMAScript can do it with callee: function(n){if (n<2) {return 1;} else {return n * arguments.callee(n-1);}} it's easy in languages with letrec, eg Haskell (which calls it let): let fac x = if x<2 then 1 else fac (x-1) * x in fac and there are equivalents in Lisp and Scheme. Note that the binding of fac is local to the expression, so the whole expression is in fact an anonymous function. Are there any others?

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• Are there some cases where Python threads can safely manipulate shared state?

  - by erikg

  Some discussion in another question has encouraged me to to better understand cases where locking is required in multithreaded Python programs. Per this article on threading in Python, I have several solid, testable examples of pitfalls that can occur when multiple threads access shared state. The example race condition provided on this page involves races between threads reading and manipulating a shared variable stored in a dictionary. I think the case for a race here is very obvious, and fortunately is eminently testable. However, I have been unable to evoke a race condition with atomic operations such as list appends or variable increments. This test exhaustively attempts to demonstrate such a race: from threading import Thread, Lock import operator def contains_all_ints(l, n): l.sort() for i in xrange(0, n): if l[i] != i: return False return True def test(ntests): results = [] threads = [] def lockless_append(i): results.append(i) for i in xrange(0, ntests): threads.append(Thread(target=lockless_append, args=(i,))) threads[i].start() for i in xrange(0, ntests): threads[i].join() if len(results) != ntests or not contains_all_ints(results, ntests): return False else: return True for i in range(0,100): if test(100000): print "OK", i else: print "appending to a list without locks *is* unsafe" exit() I have run the test above without failure (100x 100k multithreaded appends). Can anyone get it to fail? Is there another class of object which can be made to misbehave via atomic, incremental, modification by threads? Do these implicitly 'atomic' semantics apply to other operations in Python? Is this directly related to the GIL?

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• dynamic check_box using field_for in rails

  - by Craig Whitley

  I have a many-to-many relationship with a link box, and I want to pull those models together into one form so I can update from the same page. I'm really struggling with getting the check_box to even show all the elements of my array - I've scoured the net and been working on this literally all day, and I'm finding it difficult to apply the information I'm reading to my problem. I'm also extremely new to RoR and I've been following a bit of an outdated video tutorial (pre 2.0) so apologies for my code. So far, I've got it to output only one key pair in the array (the last one) - although outside the form, the code used in the tutorial works exactly how it should. Thats of little use though! Host is the model for which the main form is for, and Billing is the outside model that I'm trying to add to the form. This is the code that works outside of the form from the tutorial: <% for billing in @billings -%> <%= check_box_tag('billing_title[]', billing.id, @host.billings.collect {|obj| obj.id}.include?(billing.id))%> <%= billing.title %><br /> <% end -%> I just need to know how to make it work inside the form. This is the aforementioned code that only retrieves the last array keypair after looping through them: <% f.fields_for :billings do |obj| %><br /> <%= check_box_tag('billing_title[]', billing.id, @billings.collect {|obj| obj.id}.include?(billing.id))%> <%= billing.title %><br /> <% end %> The debug(@billings) : --- - !ruby/object:Billing attributes: title: Every Month id: "1" attributes_cache: {} - !ruby/object:Billing attributes: title: 12 Months id: "2" attributes_cache: {} - !ruby/object:Billing attributes: title: 6 Months id: "5" attributes_cache: {} Any help really appreciated.

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• Execute SQL on CSV files via JDBC

  - by Markos Fragkakis

  Dear all, I need to apply an SQL query to CSV files (comma-separated text files). My SQL is predefined from another tool, and is not eligible to change. It may contain embedded selects and table aliases in the FROM part. For my task I have found two open-source (this is a project requirement) libraries that provide JDBC drivers: CsvJdbc XlSQL JBoss Teiid Create an Apache Derby DB, load all CSVs as tables and execute the query. These are the problems I encountered: it does not accept the syntax of the SQL (it uses internal selects and table aliases). Furthermore, it has not been maintained since 2004. I could not get it to work, as it has as dependency a SAX Parser that causes exception when parsing other documents. Similarly, no change since 2004. Have not checked if it supports the syntax, but seems like an overhead. It needs several entities defines (Virtual Databases, Bindings). From the mailing list they told me that last release supports runtime creation of required objects. Has anyone used it for such simple task (normally it can connect to several types of data, like CSV, XML or other DBS and create a virtual, unified one)? Can this even be done easily? From the 4 things I considered/tried, only 3 and 4 seem to me viable. Any advice on these, or any other way in which I can query my CSV files? Cheers

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• Specific programming text editor for simple open/close editing

  - by queen3

  I'm looking for very specific text editor: Closes on ESC, no project management or tabs Syntax highlighting - preferably with color themes (e.g. can apply different color themes without changing C# coloring definition) or, at least, can load/save themes; support for C/C#/XML/HTML/JavaScript/etc - common MS/.NET world - out of box Configurable keys, or: Shift-Tab shifts blocks XML/HTML auto-completion support - well, optional I use synplus plugin for Total Commander currently, but it has few drawbacks (e.g. crashes sometimes ;-), no auto-completion, etc). Basically I want fast Visual-Studio-like editor that I open, do edits, and then close using ESC. I remember I tried Notepad++, etc - most of them open files in tabs, don't close on ESC... - that is, behave like IDE. At least I've just downloaded Notepad++, it doesn't close on ESC even if I setup keybindings to do so. Autocompletion is optional (though it is to be simple as just tags completion), what I really look for is closing on ESC, not getting in the way with all the tabs and IDE-like, and good coloring. Plus shift-tab is must have for blocks manipulation. Update: any open-source one that I can easily tweak to close on ESC? ;-) Seems like ESC (and reasonable color highlighting) is the core requirement. I've just tried many editors - Programmer's Notepad, E, Crimson, etc - I can't set any of them to close on ESC. Any external tool to close selected program on ESC? ;-) UPDATE: Hm, found an awesome utility for my latest thought: http://www.autohotkey.com. Easy to setup to close any window on ESC (as well as many other tricks). Seems like the most tough requirements is gone - I can use ANY text editor ;-)

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• application-context.xml problem for Spring ActionScript

  - by jiri

  content of The application-content.xml is <?xml version="1.0" encoding="utf-8"?> <objects xmlns="http://www.springactionscript.org/schema/objects" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springactionscript.org/schema/objects http://www.springactionscript.org/schema/objects/spring-actionscript-objects-1.0.xsd"> <property file="strings.properties" /> <object id="string1" class="String"/> <object id="string2" class="String"/> <object id="nlslzf" class="com.sgb.model.MyClass"/> </objects> content of strings.properties is: s1=Firststring s2=Secondstring but error: Main Thread (Suspended: Error: An object definition for 'string1' was not found.) org.springextensions.actionscript.ioc.factory.support::AbstractObjectFactory/getObject SpringActionScript/test SpringActionScript/onCreationComplete SpringActionScript/___SpringActionScript_Application1_creationComplete flash.events::EventDispatcher/dispatchEventFunction [no source] mx.core::UIComponent/dispatchEvent mx.core::UIComponent/set initialized mx.managers::LayoutManager/doPhasedInstantiation Function/http://adobe.com/AS3/2006/builtin::apply [no source] mx.core::UIComponent/callLaterDispatcher2 mx.core::UIComponent/callLaterDispatcher2 mx.core::UIComponent/callLaterDispatcher i can run normal if removed the '' why it is? springactionscript bug?

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• iphone certain PDFs rendering as black image

  - by skantner

  I'm trying to draw the pages of a PDF using the code below. Some PDF's render correctly, but others simply show as a completely black image, or have partial portions rendered and the rest black. In comparing what's going on, the ones that show OK seem to have always have "regular" text in them along with some graphics (diagrams, etc.), while the ones that come out black are typically all graphics (like a page of sheet music, for example). Can anyone point me in the right direction on this? I building this on the new 3.2 SDK. Thanks! // PDF page drawing expects a Lower-Left coordinate system, so we flip the coordinate system // before we start drawing. CGContextTranslateCTM(context, 0.0, self.bounds.size.height); CGContextScaleCTM(context, 1.0, -1.0); // Grab the first PDF page CGPDFPageRef page = CGPDFDocumentGetPage(myPDF, pageNo); // We're about to modify the context CTM to draw the PDF page where we want it, so save the graphics state in case we want to do more drawing CGContextSaveGState(context); // CGPDFPageGetDrawingTransform provides an easy way to get the transform for a PDF page. It will scale down to fit, including any // base rotations necessary to display the PDF page correctly. CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(page, kCGPDFCropBox, self.bounds, 0, true); // And apply the transform. CGContextConcatCTM(context, pdfTransform); // Finally, we draw the page and restore the graphics state for further manipulations! CGContextDrawPDFPage(context, page); CGContextRestoreGState(context);

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• Windows Installer custom action BEFORE any validation

  - by Marc

  I wrote a Windows Installer custom action based on the tutorial found here: http://www.codeproject.com/kb/install/msicustomaction.aspx My custom action is killing a background process of a given name which could still be opened by the user. The reason is that I don't want users to see the warning that a given EXE is running and must be closed so that setup can continue. This works fine when the MSI passes through the UI sequence as the action is created in "InstallUISequence" table like in the tutorial. However, when the MSI is used silently (right-click and select repair or uninstall), then my custom action isn't executed of course. Where do I have to put my custom action so that it is executed immediately also when run silently? I tried adding it to "InstallExecuteSequence", but the 'app running' warning is still shown. I then tried lowering the sequence number of my custom action to 5, but this also didn't help. Note: I'm using Orca to modify an MSI generated from a Visual Studio setup project. I'm then using the transform file to apply it.

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