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• JQuery: Problem in getting element's width in Chrome

  - by Sarfraz

  Hello, Suppose I have this image: <img src="images/01.jpg" border="0" rel="shadow" /> Then with JQuery, I get its width using: $('[rel="shadow"]').width(); Firefox and IE report correct dimensions of the image eg 140px while Chrome reports 0. How to solve this problem? Note: I don't want to set explicit width for images eg: <img src="images/01.jpg" border="0" rel="shadow" width="140" /> So, how to get width in cross-browser way which is not defined in width attribute of elements? Thanks

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• * css hack no longer working in ie8?

  - by Haroldo

  Ok so i want to make my border css only applicable to ie8 or earlier (as in not ie9 when it comes out). purpose: so that in ie, the missing dropshadow will be replaced with a border: the * hack doesnt seem to be working? im testing in ie8 locally... input, textarea{ display:block; border:none; *border: 1px solid #000; -moz-box-shadow: 0px 0px 1px 1px #999; -webkit-box-shadow: 0px 0px 1px 1px #999; box-shadow: 0px 0px 1px 1px #999; -moz-border-radius: 2px; -webkit-border-radius: 2px; margin: 1px 0px 10px 0px; font-size:12px; color:#494949; }

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• Is it possible to chain -ms-filters in CSS?

  - by Jakub Hampl

  Does anyone know of a way to chain the proprietary filter properties in CSS. For example I have a div.example and I want to give it a background gradient and a drop shadow. So I'd like to do something like this: div.example { /* gradient */ filter: progid:DXImageTransform.Microsoft.Gradient(startColorstr=#cb141e78,endColorstr=#cb1dde78); /* shadow */ filter: progid:DXImageTransform.Microsoft.dropShadow(color=00143c, offX=0, offY=3, positive=true); } Except this will of course leave only the drop shadow. Anyone know a good workaround?

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• Add class to .hover functionality on a specific class name - jQuery

  - by marcamillion

  So, throughout my entire document, I would like for every single time the user hovers over an element with a specific class name, I would like a class to be added. My CSS looks like this: .hotspot:hover, .hotspothover { border: 4px solid #fff; box-shadow: 0px 0px 20px #000; -webkit-box-shadow: 0px 0px 20px #000; -moz-box-shadow: 0px 0px 20px #000; z-index: 1; } Class name: "hotspot". I tried this, but it doesn't seem to work: $("#hotspot.hover #hotspothover").addClass("bubble bottom"); Thanks.

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• Script to Copy User according to UID

  - by bradlis7

  I'm looking for a way to copy all non-system users from one PC to another. I can get the group and passwd files copied over using this awk -F":" ' $3 > 499 ' etc/passwd >> /etc/passwd awk -F":" ' $3 > 499 ' etc/group >> /etc/group But, how would I go about getting the shadow file copied over since it does not store the UID? Assume that there are over 1000 users, so doing a grep with the usernames, such as egrep '(bob|bill|sarah|sal):' etc/shadow >> /etc/shadow generating the usernames from the awk code above, would be a bit inefficient, but a possible option.

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• css: filters how to disable them for a certain class?

  - by jony

  On IE I'm having a bit of trouble with my CSS: body.transparent { background-color: transparent; color:#ffffff; text-shadow: 0 -1px #000, 1px 0 #000, 0 1px #000, -1px 0 #000; Filter:Glow(Color=#000000, Strength=1); } body.transparent a { text-shadow: none; filter: -;) } The glow filter needs to be excluded on body.transparent a, like the shadow is. But I just can't disable the filter for the the links. How do I do this??

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• WebView with NSShadow slowdown

  - by Rodrigo

  I have a webview that shows some animated boxes, but it slows down and lags horribly when I put a drop shadow in the view. Without the shadow, the webview contents animate smoothly. I achieved a similar effect as safari/chrome when you do a elastic scroll with the touchpad. Looks nice! But doesnt run as smooth as in my inspirations. Here is the snippet of the shadow setting: NSShadow *dropShadow = [[NSShadow alloc] init]; [dropShadow setShadowColor:[NSColor blackColor]]; [dropShadow setShadowOffset:NSMakeSize(0, 0)]; [dropShadow setShadowBlurRadius:5.0]; [webview setWantsLayer: YES]; [webview setShadow: dropShadow]; [dropShadow release]; -- My question is: How can I work around this problem?

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• wpf: DataGrid disable selected row styles - or row selecting

  - by Sonic Soul

  I am seeing a lot of examples on how to style Selected rows in DataGrid such as this one: http://stackoverflow.com/questions/1223280/how-can-i-set-the-color-of-a-selected-row-in-datagrid Can i just disabled selected row styling? i don't want to have to override every single thing that selected row changes. Just don't want any visible changes. Gotta be easier way than to create templates.. or.. disable selecting rows, if that is easier.. but from browsing this forum that seems hacky as well http://stackoverflow.com/questions/2496814/disable-selecting-in-wpf-datagrid

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• "No Source Available" when managed exception occurs - WPF Visual Studio 2010

  - by Sonic Soul

  for some reason, my visual studio 2010 is not loading debug symbols on my own code. i am using a default WPF application solution. with a sample WPF app i am working on, and running in Debug mode. when i go into debug, i can step through my code. BUT when exception happens in my code (i.e. throw new Exception("test")), visual studio gives me the blue blank screen with "No Source Available. No symbols are loaded blah blah.." AND i can actually "view" exception details, where it will tell me the line of code my exception occured on. so it does know what happened.. it seems. it seems to think that PDB files are not loaded. my setup: options Deubg "Enable just my code (managed only)" is checked. application properties : 1 project running in Debug x86

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• WPF DataGrid : CanContentScroll property causing odd behavior

  - by Sonic Soul

  i have a solution where i generate a DataGrid (or multiple instances) based on user criteria.. each grid keeps receiving data as it comes in via ObservableCollection the problem i had, was that the scroll acted weird. It was choppy, and scrollbar would resize it self while scrolling. than i found.. CanContentScroll property! It completely fixes the weird scrolling behavior bringing me temporary bliss and happiness. however, it causes 2 unfortunate side effects. whenever i re-create grid instances and bind them to my observable collection, it freezes my entire window for 5 seconds. when my grid grows to a big size, this delay can last for 30 seconds. when i call TradeGrid.ScrollIntoView(TradeGrid.Items(TradeGrid.Items.Count - 1)) to scroll to the bottom, it jumps to bottom and than back to the top. is there another way to achieve smooth scrolling perhaps?

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• WPF Repeater (like) control for collection source??

  - by Sonic Soul

  I have a WPF DataGrid bound to ObservableCollection. Each item in my collection has Property which is a List. In my row details pane, i would like to write out formatted textblocks for each item in this collection. The end result would be something equivalent to: <TextBlock Style="{StaticResource NBBOTextBlockStyle}" HorizontalAlignment="Right"> <TextBlock.Inlines> <Run FontWeight="Bold" Text="{Binding Path=Exchanges[0].Name}" /> <Run FontWeight="Bold" Text="{Binding Path=Exchanges[0].Price}" /> <LineBreak /> <Run Foreground="LightGray" Text="{Binding Path=Exchanges[0].Quantity}" /> </TextBlock.Inlines> </TextBlock> <TextBlock Style="{StaticResource NBBOTextBlockStyle}"> <TextBlock.Inlines> <Run FontWeight="Bold" Text="{Binding Path=Exchanges[1].Name}" /> <Run FontWeight="Bold" Text="{Binding Path=Exchanges[1].Price}" /> <LineBreak /> <Run Foreground="LightGray" Text="{Binding Path=Exchanges[1].Quantity}" /> </TextBlock.Inlines> </TextBlock> and so on 0-n times. I've tried using ItemsControl for this: <ItemsControl ItemsSource="{Binding Path=Exchanges}"> <DataTemplate> <Label>test</Label> </DataTemplate> </ItemsControl> however, this appears to be only meant for more static sources, as it throws the following exception (collection is not altered after creation): ItemsControl Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead Is there another way to achieve this?

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• Invalid Cast Exception ASP.NET C#

  - by Shadow Scorpion

  I have a problem in this code: public static T[] GetExtras <T>(Type[] Types) { List<T> Res = new List<T>(); foreach (object Current in GetExtras(typeof(T), Types)) { Res.Add((T)Current);//this is the error } return Res.ToArray(); } public static object[] GetExtras(Type ExtraType, Type[] Types) { lock (ExtraType) { if (!ExtraType.IsInterface) return new object[] { }; List<object> Res = new List<object>(); bool found = false; found = (ExtraType == typeof(IExtra)); foreach (Type CurInterFace in ExtraType.GetInterfaces()) { if (found = (CurInterFace == typeof(IExtra))) break; } if (!found) return new object[] { }; foreach (Type CurType in Types) { found = false; if (!CurType.IsClass) continue; foreach (Type CurInterface in CurType.GetInterfaces()) { try { if (found = (CurInterface.FullName == ExtraType.FullName)) break; } catch { } } try { if (found) Res.Add(Activator.CreateInstance(CurType)); } catch { } } return Res.ToArray(); } } When I'm using this code in windows application it works! But I cant use it on ASP page. Why?

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• How can two eclipse plugin use the same preferences store?

  - by St.Shadow

  I have two plugins, say com.site.plugin.core and com.site.plugin.ui. I'd like to separate core part from UI part, so at plugin com.site.plugin.ui I created Preferences page where I defined some preferences, which should be used by com.site.plugin.core. I check article at Eclipse site, but it is quite outdated, and linked bug also do not provide much info. So is it possible to do this using standard Eclipse mechanism, or I need use direct low-level API via package org.eclipse.core.runtime.preferences?

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• ruby Test::Unit Command line options?

  - by Joe Soul-bringer

  Hi all, When running tests in Ruby's unit::test framework, is there a really easy way to specify, from the command-line, that only one test should be run (that is, specify the test class and test member variable)? If not, is there another framework that has this feature?

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• WPF: LineBreak enable/disable dynamically

  - by Sonic Soul

  i would like to make the LineBreak element inside of that TextBlock controllable by the user in preferences to Enable/Disable it being there <TextBlock Style="{StaticResource TextBlockStyle}" Width="130"> <TextBlock.Inlines> <Run Text="{Binding Path=Name}" FontWeight="Bold" Foreground="#FF2A4D9E" /> <Run Text="{Binding Path=Price}" FontWeight="Bold" /> <LineBreak /> <Run Text="{Binding Path=Quantity}" Foreground="#99000000" /> </TextBlock.Inlines> </TextBlock>

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• How do I build the jailbreak iPhone toolchain on Snow Leopard?

  - by new-soul

  I want to build the toolchain for iphone on the snow leopard.I search on google and the answer is always for leopard.I replant it on snow leopard but there are some error.I can't build it.Does somebody had build it?

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• Git on windows :|

  - by Sonic Soul

  i've been experimenting with git as my personal code rep.. and it has been a bit of a disaster with windows. i've used Subversion, CVS, and Perforce in the past.. none were as annoying to use as git. i've figured out the PGP part (for github), although my workstation no longer lets me check in, and after searching around it turns out that git bash is using putty which is not that reliable and should be configured with something else.. i was not able to configure it with windows shell extension for a nice visual of what is part of the repository, what is modified, and easy check ins, and easy pushes.. has anyone successfully configured some kind of windows shell client and can efficiently and quickly synchronize various machines? It just seems to be more pain to use than it is worth..

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• Invalid Cast Exception in ASP.NET but not in WinForms

  - by Shadow Scorpion

  I have a problem in this code: public static T[] GetExtras <T>(Type[] Types) { List<T> Res = new List<T>(); foreach (object Current in GetExtras(typeof(T), Types)) { Res.Add((T)Current);//this is the error } return Res.ToArray(); } public static object[] GetExtras(Type ExtraType, Type[] Types) { lock (ExtraType) { if (!ExtraType.IsInterface) return new object[] { }; List<object> Res = new List<object>(); bool found = false; found = (ExtraType == typeof(IExtra)); foreach (Type CurInterFace in ExtraType.GetInterfaces()) { if (found = (CurInterFace == typeof(IExtra))) break; } if (!found) return new object[] { }; foreach (Type CurType in Types) { found = false; if (!CurType.IsClass) continue; foreach (Type CurInterface in CurType.GetInterfaces()) { try { if (found = (CurInterface.FullName == ExtraType.FullName)) break; } catch { } } try { if (found) Res.Add(Activator.CreateInstance(CurType)); } catch { } } return Res.ToArray(); } } When I'm using this code in windows application it works! But I cant use it on ASP page. Why?

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• How should I manage data in an 2D vector based animation program?

  - by shadow

  I've been trying to design a program that makes 2D animations and then uses the ffmpeg library to create the video for possible use in tv and movies. The problem is when I think about how to manage the data in the application I can only think of two ways, I don't think either of them will work out very well. One is to use an SQlite database, but it seems like it will be difficult to save, especially if an artist puts 1000 things on screen. The other is to use something like linked lists, which would duplicate many features of the database and get complicated when dealing with things like points on a bezier curve and jumping to a frame and collecting all the objects that need to be drawn on that frame. Should I use one of these solutions, or is there something else that would be better? Currently planning to use C# for code.

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• Getting Argument Names In Ruby Reflection

  - by Joe Soul-bringer

  I would like to do some fairly heavy-duty reflection in the Ruby programming language. I would like to create a function which would return the names of the arguments of various calling functions higher up the call stack (just one higher would be enough but why stop there?). I could use Kernel.caller go to the file and parse the argument list but that would be ugly and unreliable. The function that I would like would work in the following way: module A def method1( tuti, fruity) foo end def method2(bim, bam, boom) foo end def foo print caller_args[1].join(",") #the "1" mean one step up the call stack end end A.method1 #prints "tuti,fruity" A.method2 #prints "bim, bam, boom" I would not mind using ParseTree or some similar tool for this task but looking at Parsetree, it is not obvious how to use it for this purpose. Creating a C extension like this is another possibility but it would be nice if someone had already done it for me. Edit2: I can see that I'll probably need some kind of C extension. I suppose that means my question is what combination of C extension would work most easily. I don't think caller+ParseTree would be enough by themselves. As far as why I would like to do this goes, rather than saying "automatic debugging", perhaps I should say that I would like to use this functionality to do automatic checking of the calling and return conditions of functions. Say def add x, y check_positive return x + y end Where check_positive would throw an exception if x and y weren't positive (obviously, there would be more to it than that but hopefully this gives enough motivation)

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• WPF exception handling when launched from WinForms

  - by Sonic Soul

  so i came across this interesting article on WPF exception handling: http://srtsolutions.com/public/item/251263 it works by declaring DispatcherUnhandledException handler in xaml <application> node. but what if a WPF window is launched from win forms application? where can i declare a general exception handler? The problem is that when WPF crashes, it brings down the whole WinForms app with it. *Edit what if instead of launching the WPF window directly, i launched an "Application" which than defined a start window?? is that possible/advisable?

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• Find all cycles in graph, redux

  - by Shadow

  Hi, I know there are a quite some answers existing on this question. However, I found none of them really bringing it to the point. Some argue that a cycle is (almost) the same as a strongly connected components (s. http://stackoverflow.com/questions/546655/finding-all-cycles-in-graph/549402#549402) , so one could use algorithms designed for that goal. Some argue that finding a cycle can be done via DFS and checking for back-edges (s. boost graph documentation on file dependencies). I now would like to have some suggestions on whether all cycles in a graph can be detected via DFS and checking for back-edges? My opinion is that it indeed could work that way as DFS-VISIT (s. pseudocode of DFS) freshly enters each node that was not yet visited. In that sense, each vertex exhibits a potential start of a cycle. Additionally, as DFS visits each edge once, each edge leading to the starting point of a cycle is also covered. Thus, by using DFS and back-edge checking it should indeed be possible to detect all cycles in a graph. Note that, if cycles with different numbers of participant nodes exist (e.g. triangles, rectangles etc.), additional work has to be done to discriminate the acutal "shape" of each cycle.

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• Collision detections and how efficient they are

  - by Shadow

  How exactly do you implement collision detection? What are the costs involved? Do different platforms(c/c++, java, cocoa/iphone, flash, directX) have different optimizations for calculating collisions. And lastly are there libraries available to do this for me, or some that I can just interpret for my platform of choice? As I understand it you would need to loop through the collision map and find the area in question and then compair the input thing(e.g. a sprite) to the type of pixel that is in the questioned area. I understand the very basic idea, but I don't understand the underlying implementation or even a higher level one for that matter. It would seem that this type of detection, or any for that matter, is very costly. Tile map? Bit array? How are these created from an image(I would guess looping and doing stuff)? The reason I ask this question is to get a better understanding of the efficiency behind the scenes and to understand exactly what is going on. Links, references, or examples would be very helpful. I know this question is a bit longwinded so any help or references would be very welcome. Thanks SO!

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• wpf style converter : "Convert" called by every datagrid column using it

  - by Sonic Soul

  I created a converter, and assigned it to a style. than i assigned that style, to the columns i want affected. as rows are added, and while stepping through debugger, i noticed that the converter convert method gets called 1 time per column (each time it is used). is there a way to optimize it better, so that it gets called only once and all columns using it get the same value? <Style x:Key="ConditionalColorStyle" TargetType="{x:Type DataGridCell}" BasedOn="{StaticResource CellStyle}"> <Setter Property="Foreground"> <Setter.Value> <Binding> <Binding.Converter> <local:ConditionalColorConverter /> </Binding.Converter> </Binding> </Setter.Value> </Setter> </Style>

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• Why is the this-pointer needed to access inherited attributes?

  - by Shadow

  Hi, assume the following class is given: class Base{ public: Base() {} Base( const Base& b) : base_attr(b.base_attr) {} void someBaseFunction() { .... } protected: SomeType base_attr; }; When I want a class to inherit from this one and include a new attribute for the derived class, I would write: class Derived: public Base { public: Derived() {} Derived( const Derived& d ) : derived_attr(d.derived_attr) { this->base_attr = d.base_attr; } void SomeDerivedFunction() { .... } private: SomeOtherType derived_attr; }; This works for me (let's ignore eventually missing semicolons or such please). However, when I remove the "this-" in the copy constructor of the derived class, the compiler complains that "'base_attr' was not declared in this scope". I thought that, when inheriting from a class, the protected attributes would then also be accessible directly. I did not know that the "this-" pointer was needed. I am now confused if it is actually correct what I am doing there, especially the copy-constructor of the Derived-class. Because each Derived object is supposed to have a base_attr and a derived_attr and they obviously need to be initialized/set correctly. And because Derived is inheriting from Base, I don't want to explicitly include an attribute named "base_attr" in the Derived-class. IMHO doing so would generally destroy the idea behind inheritance, as everything would have to be defined again. EDIT Thank you all for the quick answers. I completely forgot the fact that the classes actually are templates. Please, see the new examples below, which are actually compiling when including "this-" and are failing when omiting "this-" in the copy-constructor of the Derived-class: Base-class: #include <iostream> template<class T> class Base{ public: Base() : base_attr(0) {} Base( const Base& b) : base_attr(b.base_attr) {} void baseIncrement() { ++base_attr; } void printAttr() { std::cout << "Base Attribute: " << base_attr << std::endl; } protected: T base_attr; }; Derived-class: #include "base.hpp" template< class T > class Derived: public Base<T>{ public: Derived() : derived_attr(1) {} Derived( const Derived& d) : derived_attr(d.derived_attr) { this->base_attr = d.base_attr; } void derivedIncrement() { ++derived_attr; } protected: T derived_attr; }; and for completeness also the main function: #include "derived.hpp" int main() { Derived<int> d; d.printAttr(); d.baseIncrement(); d.printAttr(); Derived<int> d2(d); d2.printAttr(); return 0; }; I am using g++-4.3.4. Although I understood now that it seems to come from the fact that I use template-class definitions, I did not quite understand what is causing the problem when using templates and why it works when not using templates. Could someone please further clarify this?

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