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• JQuery - How do I count the number of elements selected by a selector?

  - by Josh

  I am using $().fadeOut() to fade items out in a list ( < li < /li). When the list is empty I wish to hide a parent object. I plan on doing this by checking in my trigger event that fades the list if the count of the objects is 0 then hide the parent element. I can use the fadeOut callback to remove the elements if necessary. The to the point question: How do I select li tags inside a ul and then get the total count of them using jquery?

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• is this possible: c# collection of Type with constrains, or collection of generic type?

  - by Jon

  I'm trying to store types in a collection, so that i can later instantiate objects of the types in the collection. But I'm not sure how to do this the best way. What i have so far: List<Type> list = new List<Type>(); list.Add(typeof(MyClass)); var obj = (MyClass)Activator.CreateInstance(list[0]); I would like to have some constrains on the Type, or better yet, just a generic type in the collection instead of an instantiated Type object. Is this possible?

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• jQuery: How do I insert an html string an arbitrary number of times (i.e. not with an each() function)?

  - by Sam Bivins

  I just need to take a certain html query object and append it to an html element a lot of times. I have this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box); and it works fine, but it just adds one 'box' after the #firstbox element. I'd like to do something like this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box * 6000); so that it will insert 6000 copies of that 'box' html, but this is not working. This is I'm sure the easiest thing to do, but I can't seem to find how to multiply actions like this without using the each() function, which doesn't apply here because I don't have 6000 of anything on my page. Thanks.

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• java.util.Observable, will clients complete executing their update() before continuing

  - by jax

  When I call: setChanged(); notifyObservers() on a java.until.Observable class, will all the listening Observer objects complete execution of their udpate() methods - assuming we are running in the same Thread - before the java.until.Observable class continues running? This is important because I will be sending a few messages through the notifyObservers(Object o) method in quick concession, it is important that each Observer class has finished its method before the new one though. I understand that the order of execution for each Observer class may vary when we call notifyObservers() - it is just important that the order of method execution for each individual instance is in order.

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• python's `with` statement

  - by Prestel Nué

  Hi there, seems like I do not understand something with---the python with statement. Consider this class: class test(object): def __enter__(self): pass def __exit__(self, *ignored): pass now, when using it with with, like in with test() as michael: print repr(michael) I would expect some output like <test instance at memore blah>. But I get None. Something wrong here? Any suggestions would help. (I am using Python 2.6.6.) EDIT: Thanks to ephement for pointing me to the documentation. The __enter__ method should read def __enter__(self): return self

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• Shall I optimize or let compiler to do that?

  - by Knowing me knowing you

  What is the preferred method of writing loops according to efficiency: Way a) /*here I'm hoping that compiler will optimize this code and won't be calling size every time it iterates through this loop*/ for (unsigned i = firstString.size(); i < anotherString.size(), ++i) { //do something } or maybe should I do it this way: Way b) unsigned first = firstString.size(); unsigned second = anotherString.size(); and now I can write: for (unsigned i = first; i < second, ++i) { //do something } the second way seems to me like worse option for two reasons: scope polluting and verbosity but it has the advantage of being sure that size() will be invoked once for each object. Looking forward to your answers.

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• Javascript Getting specific element (of parent) by name

  - by Fluidbyte

  I'm using custom tags to define sections in an application, so I have something like this: <mysection> <form> <input name="myfield"> </form> </mysection> I'm using the following and able to get the tag (printed to console, everything is groovy) var parent = document.getElementsByTagName('mysection'); The issue I'm having is finding the child field by name: var myfield = parent.getElementsByName("myfield"); ...as I don't want to pick up on any other 'sections' that might have an input with the name 'myfield'. EDIT: var parent = document.getElementsByTagName('mysection')[0]; was suggested and returns to console the section contents, however, getElementsByName throws an error: Uncaught TypeError: Object #<NodeList> has no method 'getElementsByName'

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• Fastest way to convert a binary file to SQLite database

  - by chown

  I've some binary files and I'm looking for a way to convert each of those files to a SQLite database. I've already tried C# but the performance is too slow. I'm seeking an advice on how and what programming language should be the best to perform this kind of conversion. Though I prefer any Object Oriented Language more (like C#, Java etc), I'm open for any programming language that boosts up the conversion. I don't need a GUI frontend for the conversion, running the script/program from console is okay. Thanks in advance

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• Need help with this question: Write Java code which reads numbers from the keyboard.....

  - by Chris

  Write Java code which reads numbers from the keyboard until zero is entered. Only the positive numbers entered are to be added to a variable-sized collection. This is what I have so far: import java.lang.*; import java.util.*; import java.io.*; import java.net.*; public class Demo1App extends Object { public static void main(String[] argStrings) throws Exception { ArrayList myArrayList = new ArrayList(); Scanner input = new Scanner(System.in); System.out.println ("NUMBERS:"); while (int input > 0) { myArrayList.add(input); } while (int input < 0) { System.out.println ("ENTER NUMBERS GREATER THAN 0!"); } } } This code doesn't work, I'm not sure why but any help with it would be appreciated.

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• Dictionary not deserializing

  - by Shadow

  I'm having a problem where one Dictionary in my project is either not serializing or not deserializing. After deserializing, the data I serialized is simply not in the object. Here's the relevant snip of the class being serialized: class Person : ISerializable { private Dictionary<Relation,List<int>> Relationships = new Dictionary<Relation,List<int>>(); public Person(SerializationInfo info, StreamingContext context) { this.Relationships = (Dictionary<Relation, List<int>>) info.GetValue("Relationships", typeof(Dictionary<Relation, List<int>>)); } public void GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("Relationships", this.Relationships); } } Note, this is binary serialization. Everything else in the project serializes and deserialzes correctly.

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• Does GenerateScriptType support NonSerialized?

  - by BlueFox

  I have an object that's used both on the client and server side. GenerateScriptType(typeof(MyClass)) However, there are some fields that I don't need on the client, so my question is there any way to prevent those fields being serialized? (For example, Field2 and Field3 in MyClass) I tried marking the fields with [NonSerialized] but they still get serialized... public class MyClass { public string Field1; public string Field2 { get; set; } private string _field3; public string Field3 { get { return _field3 ?? (_field3 = "lala"); } } } Regards,

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• Count Records in Listing View

  - by 47

  I have these two models: class CommonVehicle(models.Model): year = models.ForeignKey(Year) series = models.ForeignKey(Series) engine = models.ForeignKey(Engine) body_style = models.ForeignKey(BodyStyle) ... class Vehicle(models.Model): objects = VehicleManager() stock_number = models.CharField(max_length=6, blank=False) vin = models.CharField(max_length=17, blank=False) common_vehicle = models.ForeignKey(CommonVehicle) .... What I want to do is to have a count of how many times a given CommonVehicle object is used in the Vehicle class. So far my attempts are giving me one number, which is a total of all the records. How can I have the count being the total appearances for each CommonVehicle

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• How to skew/resize/distort an image given points within that image (iPhone)

  - by user544082

  I want to take an image in which there will be a quadrilateral, and skew or otherwise distort the entire image such that the object that was a quadrilateral is now a square or rectangle. I realize this will distort the image, and that is okay. I know how to skew or manipulate an image, but I can't conceptualize how this would be done given information regarding the coordinates of the four points that define the corners of a quadrilateral within the image itself. I can safely find those coordinates every time, so that part is a given. This is for an experimental iPhone app. Any help would be much appreciated.

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• Does specifying image size in CSS allow the browser to do layout before download is complete?

  - by eaolson

  I've always tried to specify the height and width attributes for img tags in HTML. Not for style reasons, but because the browser then expects the size of the image and can do page layout even before the image has finished downloading. From the HTML spec: The height and width attributes give user agents an idea of the size of an image or object so that they may reserve space for it and continue rendering the document while waiting for the image data. I don't know why this has never occurred to me, but does specifying height and width in CSS, rather than inside the img tag, do the same thing?

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• Throwing special type of exception to terminate unit test

  - by trendl

  Assume I want to write a unit test to test a particular piece of functionality that is implemented within a method. If I wanted to execute the method completely, I would have to do some extra set up work (mock objects expectations etc.). Instead of doing that I use the following approach: - I set up the expectations I'm interested in verifying and then make the tested method throw a special type of exception (e.g. TerminateTestException). - Further down in the unit test I catch the exception and verify the mock object expectations. It works fine but I'm not sure it is good practice. I do not do this regularly, only in cases where it saves me time and effort. One thing that comes to mind as an argument against using this is that throwing exceptions takes long time so the tests execute slower than if I used a different approach.

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• Visual C++ CreateThread Parameter Problem

  - by Vanwaril

  I have a class that contains a function that calls create thread, and needs to pass itself (this) as a parameter: DWORD threadId; HANDLE h = CreateThread( NULL, 0, runThread, this, 0, &threadId); My runThread definition is as follows: DWORD WINAPI runThread(LPVOID args) { Obj *t = (Obj*)args; t->funct(); return 0; } Unfortunately, the object t that I get in runThread() gets garbage. My Obj class has a function pointer attribute. Could that be the problem? class Obj{ void(*funct)(); and in the constructor: Obj(void(*f)()) { funct = f; } where is my mistake? The function pointer, the createThread itself, or type-casting? I tried whatever I could think of.

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• iqueryable select/where not working

  - by Steve

  I have two tables Boxer and Prospect. Boxers has general stuff like name and and dob etc and a BoxerId While Prospect contains only one value (at the moment) which is a boxerId. If a boxer is a prospect(up and coming boxer) there Id will be in the prospect table. This works fine but now I want to select all boxers that are prospects public static IQueryable<Boxer> IsProspect(this IQueryable<Boxer> query) { //this does not filter down to only prospects!!! return query.Where(x => x.Prospect != null); } This is the function I call using: var repository = GetRepository<Boxer>(); var boxers = repository.Query().IsProspect(); I would hope this would filter my collection of all boxers down to just boxers that are prospects! Oddly it doesnt filter it but if i hover over my boxers object and look at each boxer during debugging I can see "IsProspect" true or false correctly

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• Making an element draggable?

  - by user246114

  Hi, I'm trying to make an element draggable, like so: var element = $("<li id='test'>Hello</li>"); element.appendTo("#panelParent"); element.draggable("enable"); element.draggable("option", "connectToSortable", '#panelTarget'); element.draggable("option", "helper", 'clone'); element.draggable("option", "revert", 'invalid'); nothing happens when I try dragging this element. It works fine though if I embed the object in the page beforehand instead of trying to dynamically create the element. Any idea what I'm missing? For example, this works: $(function() { $("#test").draggable({ connectToSortable: '#panelTarget', helper: 'clone', revert: 'invalid' }); }); <ul> <li id='test'>Hello</li> </ul> Thanks

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• Multiple uses of "this" keyword in Java

  - by frodosamoa

  So, I have this. It compares two card decks and if they are the same the result is true. public boolean equals ( Object obj ) { boolean result = true; for (int i = 0; i < 52; i++) { if (this.cardAt(i) = this2.cardlist(i)) { result = true; } else { result = false; } } } I would like to be able to compare two random card decks, if you will. But I don't know how to compare two different ones using "this . I simply wrote "this2" to replace another instance of "this". What could I do to replace this "this2" to still be able to compare two card decks?

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• How to change Session for only one route in asp.net mvc?

  - by denis_n

  How to handle Application_BeginRequest using a custom filter in asp.net mvc? I want to restore session only for one route (~/my-url). It would be cool, if I could create a custom filter and handle that. protected void Application_BeginRequest(object sender, EventArgs e) { var context = HttpContext.Current; if (string.Equals("~/my-url", context.Request.AppRelativeCurrentExecutionFilePath, StringComparison.OrdinalIgnoreCase)) { string sessionId = context.Request.Form["sessionId"]; if (sessionId != null) { HttpCookie cookie = context.Request.Cookies.Get("ASP.NET_SessionId"); if (cookie == null) { cookie = new HttpCookie("ASP.NET_SessionId"); } cookie.Value = sessionId; context.Request.Cookies.Set(cookie); } }

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• WndProc to detect device unplug and plug

  - by Kev Fixx

  How can I know a devices is plug or unplug in WPF? I am using the code below to detect device changes: private void OnSourceInitialized(object sender, EventArgs e) { IntPtr windowHandle = (new WindowInteropHelper(this)).Handle; HwndSource src = HwndSource.FromHwnd(windowHandle); src.AddHook(new HwndSourceHook(WndProc)); } private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { // Handle WM_DEVICECHANGE... if (msg == 0x219) { InitHead(); } return IntPtr.Zero; } Thank you. EDITED: I did the below, still not working: if (msg == 0x0219) { switch (wParam.ToInt32()) { case 0x8000: { InitHead(); } break; } }

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• [Resolved] OWC does not work with IE8

  - by mactov

  Hi, I have a web page that is generated with Access 2003 and uses Office Web Components. It worked fine with IE6 and IE7 but does not work anymore with IE8. Here are more details. I create an MSODSC component and a WSH object to get my ConnectionString in the registry. Then the Dropdown Lists are fed by a request to the database. It works perfect with IE6 and IE7, works locally with IE8 but if the page is served by IIS to IE8, the drop down lists are empty. Can anyone help me ? Thanks Mactov It was just a security issue. I had put my site in the confidence zone (according to the error message). I transfered it into intranet zone and it works perfect.

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• Trying to exlcude VTI* paths in MSIDXS sql select statement

  - by Catdirt

  Hi, using a c# asp.net page, building a SQL query string to run against an index server catalog: string SQL = "SELECT doctitle, vpath, Path, Write, Size, Rank "; SQL += "FROM \"" + strCatalog + "\"..SCOPE() "; SQL += "WHERE"; SQL += " CONTAINS(Contents, '" + strQP + "') "; SQL += "AND NOT CONTAINS(Path, '\"_vti_\"') "; SQL += "AND NOT CONTAINS(FileName, '\".ascx\" OR \".config\" OR \".css\"') "; SQL += "ORDER BY Rank DESC"; Seems to work fine, except it will return results in the _vti_ directories which I am trying to avoid. Edit: All but asked question, so to be technical: How can I search the index and have it not return files from the vti folders? Switching to use an ixsso query object is possible, but i'd rather avoid it for this particular instance.

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• accessing ok.DialogResult inside a function

  - by sayyad

  I am writing function which accepts user input from textbox. Action will take place when ok button is clicked. i made button(DialogResult=OK). code looks like private void canny() { // if (this.DialogResult == DialogResult.OK) { MessageBox.Show("ok"); } //to Do } But I can't see any messagebox. What I am missing. private void ok_Click(object sender, EventArgs e) { // should I add here some thing } Should I add control Form1.Control.Add(Ok)?????????????????? if yes in which part of code. regards,

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• Choosing an alternative ( visual basic) high level programming language

  - by user370244

  I used to be visual basic 6 programmer, i was pleased with visual basic : it is high level language that do stuff fast,easy to learn, easy to do stuff in,you can drag and drop stuff to the form and write your code,it is simply amazing.however microsoft buried VB6 and pointed us to VB.NET which is so different that it is not the old VB anymore.I didn't like what microsoft did and would like to look somewhere AWAY from microsoft and from any other proprietary language . I would like to look into a similar language that is easy,cross platform (windows / Linux), object oriented, visual design, non proprietary and compile (for some guarding against reverse engineering). i am freelancer so the choice is entirely mine,i don't care about performance of programs, the time taken to develop a given programs is much more important. desktop / database / GUI /networking programming is what i am looking for. so any such language offered by our open source community ? thank you so much

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