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  • Python "draw() must be called with Label instance as first argument (got _WindowMetaclass instance i

    - by Amorack
    This is a class I made using Python with pyglet to display a window. class Window(pyglet.window.Window): def __init__(self): super(Window, self).__init__() pyglet.text.Label("Prototype") windowText = text.Label.draw(Window, "Hello World", font_name = "Times New Roman", font_size = 36, color = (193, 205, 193, 255)) def on_draw(self): self.clear() self.label.draw() Every time I try to run it I get the error "TypeError: unbound method draw() must be called with Label instance as first argument (got _WindowMetaclass instance instead)". I'm pretty sure I know what I have to do (find how to get Label's instance) just not how to do it. Could someone help me understand how to make this work?

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  • Hibernate - hibernate.hbm2ddl.auto = validate

    - by azp74
    I am interested in how hibernate.hbm2ddl.auto=validate actually works and I am struggling to find comprehensive documentation. We've recently discovered production system was affected by http://opensource.atlassian.com/projects/hibernate/browse/HHH-3532 (Hibernate matches foreign keys on name, rather than signature and so will recreate them for you) and hibernate.hbm2ddl.auto=update is being removed from our next release. I would be quite happy to just get rid of hibernate.hbm2ddl.auto altogether and manage our database ourselves. However, not all my colleagues share this world view and some are keen to add back in hibernate.hbm2ddl.auto=validate. I'm concerned this will hit the same problem and I'm interested in finding more documentation about how this validation actually works. The Hibernate Community Documentation (http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html) really just makes reference to the values. Does anyone have any good documentation pointers, or any real life experience of using validate in a production system?

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  • Are some data structures more suitable for functional programming than others?

    - by Rob Lachlan
    In Real World Haskell, there is a section titled "Life without arrays or hash tables" where the authors suggest that list and trees are preferred in functional programming, whereas an array or a hash table might be used instead in an imperative program. This makes sense, since it's much easier to reuse part of an (immutable) list or tree when creating a new one than to do so with an array. So my questions are: Are there really significantly different usage patterns for data structures between functional and imperative programming? If so, is this a problem? What if you really do need a hash table for some application? Do you simply swallow the extra expense incurred for modifications?

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  • Sort ArrayList of custom Objects by property

    - by Samuel
    Hello World!! :D I had a question which is pretty easy if you know the answer I guess. I read about sorting ArrayLists using a Comparator but somehow in all of the examples people used compareTo which according to some research is a method working on Strings... I wanted to sort an ArrayList of custom objects by one of their properties: a Date object (getStartDay()). Normally I compare them by item1.getStartDate().before(item2.getStartDate()) so I was wondering whether I could write something like: public class customComparator { public boolean compare(Object object1, Object object2) { return object1.getStartDate().before(object2.getStartDate()); } } public class randomName { ... Collections.sort(Database.arrayList, new customComparator); ... } I just started with Java so please forgive my ignorance :) Thanks in advance!! -Samuel

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  • Creating WCF DataContracts dynamically from code

    - by Fredrik Tonn
    Given the fact that I have a fully dynamic object model, that is, I have no concrete classes defined anywhere in code, but I still want to be able to create WCF DataContracts for them so I can use them in operations. How can I achieve this? My concrete class "Entity" implements ICustomTypeDescriptor which is used to present the various properties to the outside world, but my expeimentation with WCF suggests that WCF does not care about ICustomTypeDescriptor. Is this correct or have I missed something? Is this possible? It cannot be so that the only way to create a DataContract is to actually have a concrete harcoded class, can it?

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  • Detect block size for quota in Linux

    - by Chen Levy
    The limit placed on disk quota in Linux is counted in blocks. However, I found no reliable way to determine the block size. Tutorials I found refer to block size as 512 bytes, and sometimes as 1024 bytes. I got confused reading a post on LinuxForum.org for what a block size really means. So I tried to find that meaning in the context of quota. I found a "Determine the block size on hard disk filesystem for disk quota" tip on NixCraft, that suggested the command: dumpe2fs /dev/sdXN | grep -i 'Block size' or blockdev --getbsz /dev/sdXN But on my system those commands returned 4096, and when I checked the real quota block size on the same system, I got a block size of 1024 bytes. Is there a scriptable way to determine the quota block size on a device, short of creating a known sized file, and checking it's quota usage?

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  • How to send mails through php script?

    - by Zeeshan Rang
    Hello everyone. How can i send mails through the php script?? I am trying to do somthing like this: for($k=0;$k<=$x->length-1;$k++) { for($l=0;$l<=$j-1;$l++) { if($y->item($k)->nodeValue==$JobNoArr[$l] && $AcceptanceDateArr[$l]=='0000-00-00') { //echo $v->item($k)->nodeValue ; $email = $v->item($k)->nodeValue . ","; $to = $email; $subject = "My subject"; $txt = "Hello world!"; $headers = "From: [email protected]" . "\r\n" . "CC: [email protected]"; mail($to,$subject,$txt,$headers); } } } Please help me in this issue. Best Zeeshan

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  • asp.net mvc json 2 times post to the controller

    - by mazhar kaunain baig
    function onTestComplete(content) { var url = '<%= Url.Action("JsonTest","Organization") %>'; $.post(url, null, function(data) { alert(data["name"]); alert(data["ee"]); }); } <% using (Ajax.BeginForm("JsonTest", new AjaxOptions() { HttpMethod = "POST", OnComplete = "onTestComplete" })) { %> <%= Html.TextBox("name") %><br /> <input type="submit" /> <% } % controller:` [HttpPost] public ActionResult JsonTest() { var data = new { name = "TestName",ee="aaa" }; return Json(data); }` Due to some reason When I click on the button (My Break point is in the controller jsontest method) The jsontest is called twice(that's the real problem).I want to call it once as usual,using Ajax.BeginForm( "", new AjaxOptions { HttpMethod = "POST", OnComplete = "onTestComplete" })) I am able to call it once but it doesn't post the values to the controller.

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  • Should i really use integer primary IDs?

    - by arthurprs
    For example, i always generate an auto-increment field for the users table, but i also specifies an UNIQUE index on their usernames. There is situations that i first need to get the userId for a given username and then execute the desired query. Or use a JOIN in the desired query. It's 2 trips to the database or a JOIN vs. a varchar index The above is just an example There is a real performance benefit on INT over small VARCHAR indexes? Thanks in advance!

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  • Web Services vs Persistent Sockets

    - by dsquires
    I plan on doing a little benchmarking around this question, myself. But I thought it would be good to get some initial feedback from "the community". Has anyone out there done any analysis regarding the pros and cons of these two technologies? My thoughts: Opening and closing TCP/IP connections for web service calls is relatively expensive compared to persistent connections. Dealing with intermittent connection errors and state, etc... would be easier with a web service based framework. You don't see World of Warcraft using web services. One question that I can't seem to find much of answer for anywhere (even on here)... are the limits on the # of persistent connections a single network card can support, etc?

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  • Chained address rewrite

    - by kemp
    What I need to do is rewriting this address: (1) http://localhost/wordpress/fake/text-value to (2) http://localhost/wordpress/gallery?somevar=text-value Notes: the remapping must be transparent: the user always has to see address (1) gallery is a permalink to a wordpress page, not a real address I basically need to rewrite the address first (to modify it) and then feed it back to mod rewrite again (to let wordpress parse it its own way). Problems if I simply do RewriteRule ^fake$ http://localhost/wordpress/gallery [L] it works but the address in the browser changes, which is no good, if I do RewriteRule ^fake$ /wordpress/gallery [L] I get a 404. I tried different flags instead of [L] but to no avail. How can I get this to work?

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  • Javascript sleep

    - by fmsf
    Is any better way than this function to make a sleep in javascript, or should I just use that function? (taken from here) function pausecomp(millis) { var date = new Date(); var curDate = null; do { curDate = new Date(); } while(curDate-date < millis); } This is not a dupe of http://stackoverflow.com/questions/758688/sleep-in-javascript I want a real sleep in a middle of a function, not a delay for a piece of code;

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  • Is it worthwhile to implement observer pattern in PHP?

    - by Extrakun
    I have been meaning to make use of design pattern in PHP, such as the observer pattern, but that I have to recreate the observers' relationship each time the page is loaded pains me. As references are saved as a new concrete objects in session, there is no way to preserve relationships between subscribers and their observers unless you use a GUID or some other properties to form a lookup, and store that property instead. With the cost of recreating the relationships each time a page is loaded, is it worthwhile to use design patterns such as observers in PHP, compared to having a clean design? Any real-world experience to share?

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  • realtime collaborative editing: mobwrite on windows7 x64

    - by collabwriter
    I have set up Mobwrite on my Win7 development machine using the daemon and q.py listener. The client test suite passes, but when I run the server test suite, everything fails with this sort of response: Question: U:user10259538167863824 f:0:unittest10259538167863824 R:0:Hello world Expected: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Actual: u:user10259538167863824 F:0:unittest10259538167863824 D:0:=11 Diff: u:user10259538167863824 ¶ F:0:unittest10259538167863824 ¶ D:0:=11¶ ¶ ¶ I am assuming it has something to do with line endings, but I don't know what to do. Can anyone shed some light on this? Thanks so much! PS: I'm running Python 2.7

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  • How to recognize touch events and control a script object inside UIWebView?

    - by Markus S.
    Situation: I have an UIView with an UIWebView in it. When the viewDidLoad the Javascript Object inside the UIWebView is called (Microsoft Seadragon AJAX JS). For your Understanding: Seadragon loads a specified megapixel image(JPEG) and in a Desktop Browser like Firefox i can Zoom into the image and I can drag the crop for example from the middle to the left. In the iPhone Simulator (for iPad) only the Zooming Function is working on one single tap but when i try to drag the crop (with left mouse button click and holding it) I'm dragging the whole UIWebView but not the crop of course! Is that feature which the simulator isn't able to handle or what's yout solutin guys? Special Thanks!! P.S.: It's a bit jiggling when the zooming function of Seadragon is called. Is that authentic to the real performance of the iPad or does the simulator not have the power as the iPad has?

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  • Is it possible to use ContainsTable to get results for more than one column?

    - by LockeCJ
    Consider the following table: People FirstName nvarchar(50) LastName nvarchar(50) Let's assume for the moment that this table has a full-text index on it for both columns. Let's suppose that I wanted to find all of the people named "John Smith" in this table. The following query seems like a perfectly rational way to accomplish this: SELECT * from People p INNER JOIN CONTAINSTABLE(People,*,'"John*" AND "Smith*"') Unfortunately, this will return no results, assuming that there is no record in the People table that contains both "John" and "Smith" in either the FirstName or LastName columns. It will not match a record with "John" in the FirstName column, and "Smith" in the LastName column, or vice-versa. My question is this: How does one accomplish what I'm trying to do above? Please consider that the example above is simplified. The real table I'm working with has ten columns and the input I'm receiving is a single string which is split up based on standard word breakers (space, dash, etc.)

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  • Why is ruby called a dsl?

    - by b_ayan
    Recently, when I tried to explain why Ruby is a DSL to an intern at my organisation, I was not able to articulate my reasonings to the effect I would like to. Maybe I do not understand the space well enough to teach the nuances. Redirecting him to Martin Fowler' article or the google ranked one InfoQ or other material has not helped much either. Can some explain why Ruby is a DSL with an example / parallel situation which is not voodoo stuff for someone who is fairly new to the world of code? Understanding the ideology might also help in elaborating the intricacies of the rails ecosystem?

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  • Creating a future proof .NET 3.5 SP1 installer prerequisite for setup.exe AND the .MSI

    - by Ruben Bartelink
    I've demanded .NET 3.5 SP1 a la http://stackoverflow.com/questions/88136/will-a-vs2008-setup-project-update-net-3-5-sp1. This makes the setup.exe check correctly. I've also added a "SP1" launch condition to my MSI so it doesn't let the user install my .NET 3.5SP1 app via launching the MSI (and replaced the [VSDNETMSG] in the Framework condition message with one that actually mentions SP1). From a future proofing point of view, this feels wrong. I want the condition to be: (NETVer=3.5 AND Net35SPLevel=1) OR (NETVer=>3.5) not (NETVer=3.5 AND Net35SPLevel=1) Is there any way to do that? The framework check doesnt have a condition property to allow me to add a sub-condition... Yes, I could also just not worry my pretty little head about it :P If one of the MS versioning experts out there reads this, if you're going to put stuff that code depends on into SPs, can you please make the installer be able to check for it OOTB. (I really wish they had come up with a better numbering scheme - the world and its dog could see that this was going to get confusing)

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  • store everything only once, smarter

    - by hsmit
    In the digital world a lot is stored multiple times. As a thought experiment or creative challenge I want you to think about making this more efficient and maybe reuse more. Think of the following cases: an mp3 track is downloaded multiple times, copied over various devices on website a login form is often rebuild many times, why not reuse more code? words themselves are used many times questions and answers are accidentally saved at many places in parallel images or photos often describe the same data (Eiffel tower, Golden gate, Taj Mahal) etc etc Are you aware of solutions? Or are you thinking about similar topics? Ideas? Blueprints? I'd love to hear from you!

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  • How to free up memory?

    - by sarego
    We have been facing Out of Memory errors in our App server for sometime. We see the used heap size increasing gradually until finally it reaches the available heap in size. This happens every 3 weeks after which a server restart is needed to fix this. Upon analysis of the heap dumps we find the problem to be objects used in JSPs. Can JSP objects be the real cause of Appserver memory issues? How do we free up JSP objects (Objects which are being instantiated using usebean or other tags)? We have a clustered Websphere appserver with 2 nodes and an IHS.

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  • Variable-byte encoding clarification

    - by Myx
    Hello: I am very new to the world of byte encoding so please excuse me (and by all means, correct me) if I am using/expressing simple concepts in the wrong way. I am trying to understand variable-byte encoding. I have read the Wikipedia article (http://en.wikipedia.org/wiki/Variable-width_encoding) as well as a book chapter from an Information Retrieval textbook. I think I understand how to encode a decimal integer. For example, if I wanted to provide variable-byte encoding for the integer 60, I would have the following result: 1 0 1 1 1 1 0 0 (please let me know if the above is incorrect). If I understand the scheme, then I'm not completely sure how the information is compressed. Is it because usually we would use 32 bits to represent an integer, so that representing 60 would result in 1 1 1 1 0 0 preceded by 26 zeros, thus wasting that space as opposed to representing it with just 8 bits instead? Thank you in advance for the clarifications.

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  • Differences in behaviour between IIS and the ASP.Net Web Development Server?

    - by Kramii
    During development, I usually test ASP.Net applications using the Web Development Server (sometimes called Cassini). Occasionally, when I publish to a real IIS environment, I notice that the application behaves differently. So, what are the differences between the way that production IIS servers and the ASP.Net Web Development Server behave? I don't mean differences in feature sets (clearly IIS has lots of features that are not present in WDS), but differences in the way they handle ASP.Net. BTW: There are a few differences noted in the responses to this question, but I am sure there must be more.

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  • Projecting a 3D point to 2D screen coordinate OpenTK

    - by sinsro
    Using Monotouch and OpenTK I am trying to get the screen coordinate of one 3D point. I have my world view projection matrix set up, and OpenGL makes sense of it and projects my 3D model perfectly, but how to use the same matrix to project just one point from 2D to 3D? I thought I could simply use: Vector3.Transform(ref input3Dpos, ref matWorldViewProjection, out projected2Dpos); Then have the projected screen coordinate in projected2DPos. But the resulting Vector4 does not seem to represent the proper projected screen coordinate. And I do not know how to calculate it from there on.

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  • DESPERATE Request - jQuery tag suggestion, How is it inserting the DOM Element SPAN?

    - by nobosh
    Take a look at this snazy plugin: http://remysharp.com/2007/12/28/jquery-tag-suggestion/ ** it's real small Source: http://remysharp.com/downloads/tag.js For the life of me, I can't figure out where in the plugin JS the code is injecting the SPAN which contains the tags... I see the following around line 73: var tagMatches = document.createElement(settings.tagContainer); But where is it injecting it into the doc? I ask because I need to find a way to control where it goes based on an ID, something like this: document.body.insertBefore(newDiv, my_div); Thanks so much, and good luck, It's tricky!

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  • Catching java.lang.OutOfMemoryError

    - by dotsid
    Documentation for java.lang.Error says: An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch But as java.lang.Error is subclass of java.lang.Throwable I can catch this type of throwable. I understand why this is not good idea to catch this sort of exceptions. As far as I understand, if we decide to caught it, the catch handler should not allocate any memory by itself. Otherwise OutOfMemoryError will be thrown again. So, my question is: is there any real word scenarios when catching java.lang.OutOfMemoryError may be a good idea? if we catching java.lang.OutOfMemoryError how can we sure that catch handler doesn't allocate any memory by itself (any tools or best practicies)? Thanks a lot.

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