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  • CGRect var as property value?

    - by David.Chu.ca
    CGRect type is a structure type. If I want to define a property as this type, should I use assign or retain attribute for this type? @interface MyClass { CGRect rect; ... } @property (nonatomic, assign) rect; // or retain?

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  • vim autopopulate file

    - by David Oneill
    Is it possible to have VIM auto populate a file based on the extension? For example, when I open a new .sh file, I would like VIM to automatically type #!/bin/bash as the first line. (This example simplified down to the essentials)

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  • has_many :through default values

    - by David Lyod
    I have a need to design a system to track users memberships to groups with varying roles (currently three). class Group < ActiveRecord::Base has_many :memberships has_many :users, :through => :memberships end class Role < ActiveRecord::Base has_many :memberships has_many :users, :through => :memberships end class Membership < ActiveRecord::Base belongs_to :user belongs_to :role belongs_to :group end class User < ActiveRecord::Base has_many :memberships has_many :groups, :through => :memberships end Ideally what I want is to simply set @group.users << @user and have the membership have the correct role. I can use :conditions to select data that has been manually inserted as such : :conditions => ["memberships.grouprole_id= ? ", Grouprole.find_by_name('user')] But when creating the membership to the group the grouprole_id is not being set. Is there a way to do this as at present I have a somewhat repetitive piece of code for each user role in my Group model.

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  • jQuery Mobile button js control

    - by David
    I have a button that is not triggering event in jQuery mobile. It was working but I had to remove the css. It was screwing up my all my ul lists. Any help would greatly appreciated Here is the code for the button at the bottom of the form : <div class="next"> <a class="btnNext">Next &gt;&gt;</a> </div> Which is supposed to do this on a separate js file: init: function(){ $('.btnNext').onclick(function(){ if ($('input[type=radio]:checked:visible').length == 0) { return false; } $(this).parents('.questionContainer').fadeOut(500, function(){ Here is the css I removed: a { border: 1px solid #000; padding: 2px 5px; font-weight: bold; font-size: 10px; background: #FFF; cursor: pointer; } a:hover { background: none; }

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  • C# recursive programming with lists

    - by David Torrey
    I am working on a program where each item can hold an array of items (i'm making a menu, which has a tree-like structure) currently i have the items as a list, instead of an array, but I don't feel like I'm using it to its full potential to simplify code. I chose a list over a standard array because the interface (.add, .remove, etc...) makes a lot of sense. I have code to search through the structure and return the path of the name (i.e. Item.subitem.subsubitem.subsubsubitem). Below is my code: public class Item { //public Item[] subitem; <-- Array of Items public List<Item> subitem; // <-- List of Items public Color itemColor = Color.FromArgb(50,50,200); public Rectangle itemSize = new Rectangle(0,0,64,64); public Bitmap itemBitmap = null; public string itemName; public string LocateItem(string searchName) { string tItemName = null; //if the item name matches the search parameter, send it up) if (itemName == searchName) { return itemName; } if (subitem != null) { //spiral down a level foreach (Item tSearchItem in subitem) { tItemName = tSearchItem.LocateItem(searchName); if (tItemName != null) break; //exit for if item was found } } //do name logic (use index numbers) //if LocateItem of the subitems returned nothing and the current item is not a match, return null (not found) if (tItemName == null && itemName != searchName) { return null; } //if it's not the item being searched for and the search item was found, change the string and return it up if (tItemName != null && itemName != searchName) { tItemName.Insert(0, itemName + "."); //insert the parent name on the left --> TopItem.SubItem.SubSubItem.SubSubSubItem return tItemName; } //default not found return null; } } My question is if there is an easier way to do this with lists? I've been going back and forth in my head as to whether I should use lists or just an array. The only reason I have a list is so that I don't have to make code to resize the array each time I add or remove an item.

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  • Why is `goog.Disposable.call(this);` necessary?

    - by David Faux
    In this snippet of Google Closure javascript code involving a constructor, why is goog.Disposable.call(this); necessary? Doesn't Foo already inherit from Disposable with goog.inherits(foo, goog.Disposable);? goog.provide('foo'); /** * @constructor */ foo = function(){ goog.Disposable.call(this); } goog.inherits(foo, goog.Disposable); foo.prototype.doSomething = function(){ ... } foo.prototype.disposeInternal = function(){ ... }

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  • Basic string and value functions in Objective-C for iPhone

    - by David Maitland
    I have very little programming knowledge; only a fair bit in Visual Basic. How do I take a value from a text field, then do some simple math such as divide the value by two, then display it back to the user in the same field? In Visual Basic you could just do txtBoxOne.text = txtBoxOne.text / 2 I understand this question is more than one question and is very basic stuff, but I need to get my head out of Visual Basic and into where I should be :)

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  • grails: quering in a composite structure

    - by Asaf David
    hey i have the following domain model: class Location { String name static hasMany = [locations:Location, persons:Person] } class Person { String name } so basically each location can hold a bunch of people + "sub-locations". what is the best way to recursively query for all persons under a location (including it's sub locations, and their sub locations, etc')?

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  • How to troubleshoot "The server tag is not well formed. " error on sharepoint?

    - by David Lay
    I'm trying to edit a legacy wss3 sharepoint site. Messing around with a 700+ code lines aspx page I got a "The server tag is not well formed." error on sharepoint and The ?content=1 trick does not work. Anyone has a tip on how to get to the line that's causing the problem? I'm expecting something like the aspnet ysod, at least that's usefull. If it's worth something, I have access to the actual server.

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  • c++ template and its element type

    - by David
    This is my template matrix class: template<typename T> class Matrix { public: .... Matrix<T> operator / (const T &num); } However, in my Pixel class, I didn't define the Pixel/Pixel operator at all! Why in this case, the compiler still compiles?

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  • jQuery slider - set background color to show desired range

    - by David
    Howdy, I'm setting up a Filament Group jQuery UI slider and using it in a gradebook. We need to allow teachers to set a desired background range (to show the desirable values vs. the actual value for a given grade). I'm hoping to set a shaded area (as shown in this picture) that would indicate to people viewing the slider which values are desirable. If the handle is within the desired ranges, then the value is satisfactory. If the handle is out of the background shaded range, then some changes may need to happen. Any suggestions on how to accomplish this? Based on what I've experimented with using Firebug, it looks like a <div class="ui-slider"> is setup, but the values inside of it don't seem to allow setting background-colors (only the div allows for that). Thanks for your help.

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  • Django: Save an uploaded file to a FileField

    - by David Wolever
    I feel a little stupid for having to ask this… But I can't seem find it documented anywhere. If I've got a Model with FileField, how can I stuff an uploaded FILE into that FileField? For example, I'd like to do something like this: class MyModel(Model): file = FileField(...) def handle_post(request, ...): mymodel = MyModel.objects.get(...) if request.FILES.get("newfile"): mymodel.file = request.FILES["newfile"] But that doesn't appear to work.

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  • What should I put in the href when I prototype?

    - by David
    When protyping we often do empty anchors. A very common way to do this is to do something like: <a href="#">Go here</a> But if the client clicks this link, the page will scroll to the top. But if we leave out the href attribute, the link won't behave like a link. I've see stuff like: <a href="javascript;">Go here</a> But it doesn't look right. Any other ideas?

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  • Simple servlet or filter to process form

    - by David
    Is there a simple framework for processing form submissions via a servlet? For my needs, a framework like STRUTS seems like over kill. My ideal processor would be a servlet that converts form elements into a bean object, possibly using typing information in the form to help with the conversion. Does something like this exist or is there another solution out there geared toward simpler needs? Thanks!

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  • ASP.NET MVC model state as text

    - by David Moorhouse
    Is there an easy way to get a summary string of the errors that have been added to a controller's modelstate? I'm looking to return this in an Ajax method and want the validation errors etc to be returned to the client (i.e. the view does not exist for this method call). Or do I have to loop through the modelstate and look at each object and extract the error text manually?

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  • How to assemble a WAV file?

    - by David
    I'm doing an educational project in which 1) I record voice commands on a separate device and after appropriate processing etc... 2) I send 16-bit samples encapsulated in UDP packets over Ethernet to the PC. After receiving the packets and "extracting" data (samples) from them, I need to assemble the samples to a WAV file. Any example code? Any suggestions?

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  • When is BIG, big enough for a database?

    - by David ???
    I'm developing a Java application that has performance at its core. I have a list of some 40,000 "final" objects, i.e., I have an initialization input data of 40,000 vectors. This data is unchanged throughout the program's run. I am always preforming lookups against a single ID property to retrieve the proper vectors. Currently I am using a HashMap over a sub-sample of a 1,000 vectors, but I'm not sure it will scale to production. When is BIG, actually big enough for a use of DB? One more thing, an SQLite DB is a viable option as no concurrency is involved, so I guess the "threshold" for db use, is perhaps lower.

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  • how to check if a data exist on a table using hibernate

    - by David
    im using hibernate with my jsp page and mySQL ,how can i do that select * from student wher userName = *** with HQL and how i chek if that username exist in 'Student' table ? in my sql i use that ResultSet resultat = statement.executeQuery(); if (resultat.next()) { ....} i try this Session hibernateSession = MyDB.HibernateUtil.currentSession(); hibernateSession.find("select xxx from Etudinat where p.Nom=xxxx"); thats give an exception so how can i do that ? i have a login form send me a username and password i want to chek if that username exist in the table Student to set the user on a session what is the safty way to do that

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  • AllowSetForegroundWindow & SetForegroundWindow: NPAPI plug-in wants to allow a desktop application with no success

    - by David Robert Jones
    Here it's what I have: a web browser plug-in written in C++ and a Windows application written in C#. They communicate through a named pipe. The plug-in instructs the C# application to open a file (suppose that the file is a .txt and it opens in Notepad). Once the C# application is given the command, it opens the file but Notepad doesn't show in the foreground, which isn't acceptable, I must open Notepad in the foreground. I modified the C# application so that it calls the SetForegroundWindow function. This time Notepad didn't open in the foreground, but the taskbar flashes. After reading the documentation for SetForegroundWindow and many articles I think that now I understand what the problem is: the C# application can't bring Notepad to the foreground because it wasn't the the foreground process, the browser was (?). After reading this: "A process that can set the foreground window can enable another process to set the foreground window by calling the AllowSetForegroundWindow function." I decided to modify the plug-in. This time the plug-in calls the AllowSetForegroundWindow function passing ASFW_ANY as a parameter (I know, ASFW_ANY could be risky, but I wanted to make sure that AllowSetForegroundWindow would do it). After I did the modification to the plug-in I tested it and it worked! (Opera 12.02). Then I tested it on Internet Explorer and it worked too. But the problem came when I tested it in Firefox and Chrome. The C# application didn't have the ability to bring Notepad to the foreground. I noticed that for those browsers the AllowSetForegroundWindow function was returning false. So I started investigating and I come to the conclusion that maybe it's because the plugin container that Firefox uses. An idea came to my mind: it worked in Opera 12.02, but they don't have a plugin container, although they did in Opera 12.00. So I downloaded Opera 12.00, I did the test and it failed, which makes me conclude that the plugin container is the culprit. The question is: how can I give to the C# application the ability to set foreground? I don't know how to continue, and I think that I tried all the legitimate ways. The AllowSetForegroundWindow & SetForegroundWindow seems to not apply here.

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  • MySQL Integer vs DateTime index

    - by David Kuridža
    Let me start by saying I have looked at many similar questions asked, but all of them relate to Timestamp and DateTime field type without indexing. At least that is my understanding. As we all know, there are certain advantages when it comes to DateTime. Putting them aside for a minute, and assuming table's engine is InnoDB with 10+ million records, which query would perform faster when criteria is based on: DateTime with index int with index In other words, it is better to store date and time as DateTime or UNIX timestamp in int? Keep in mind there is no need for any built-in MySQL functions to be used.

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  • illigal start of type error (java).

    - by David
    here is the relevent code snippet: public static Rand searchCount (int[] x) { int a ; int b ; int c ; int d ; int f ; int g ; int h ; int i ; int j ; Rand countA = new Rand () ; for (int l= 0; l<x.length; l++) { if (x[l] = 0) a++ ; else if (x[l] = 1) b++ ; } } return countA ; } (Rand is the name of the class that this method is in) when compiling it get this error message: Rand.java:77: illegal start of type return countA ; ^ what's going wrong here? what does this error message mean?

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