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• Do all widgets in an Android layout file require layout_width and layout_height ?

  - by Eno

  I have a ListView composed of LinearLayouts. Inside each is an ImageView, TextView and another ImageView laid out horizontally: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" > <ImageButton android:id="@+id/thumbnail" android:background="@color/white" android:paddingTop="10dip" android:paddingLeft="8dip" android:paddingBottom="10dip" /> <TextView android:id="@+id/title" android:background="@color/white" android:textColor="@color/bntext" android:paddingTop="10dip" android:paddingLeft="8dip" /> <ImageButton android:src="@drawable/green_arrow_small" android:background="@color/white" /> </LinearLayout>

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• Bug when drawing a QImage on a widget with PIL and PyQt

  - by oulipo

  I'm trying to write a small graphic application, and I need to construct some image using PIL that I show in a widget. The image is correctly constructed (I can check with im.show()), I can convert it to a QImage, that I can save normally to disk (using QImage.save), but if I try to draw it directly on my QWidget, it only show a white square. Here I commented out the code that is not working (converting the Image into QImage then QPixmap result in a white square), and I made a dirty hack to save the image to a temporary file and load it directly in a QPixmap, which work but is not what I want to do https://gist.github.com/f6d479f286ad75bf72b7 Someone has an idea? If it can help, when I try to save my QImage in a BMP file, I can access its content, but if I try to save it to a PNG it is completely white

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• CGContextSetRBStrokeColor to replace, not add, for alpha?

  - by Peter Hajas

  I use CGContexts to allow the user to draw in my application, here's an example: CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), size); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(),r,g,b,a); I want the user to have an "eraser" tool that actually erases - it can't draw white (that would add white to the image, which may not have a white background) or alpha (or else the stroke won't do anything). Is there a way to do this? Perhaps replacing contents of a CGContext or UIImage?

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• How to achieve a palette effect on iPhone using OpenGL

  - by Joe

  I'm porting a 2d retro game to iPhone that has the following properties: targets OpenGL ES 1.1 entire screen is filled with tiles (textured triangle strip tile textured using a single 256x256 RGBA texture image the texture is passed to OpenGL once at the start of the game only 4 displayed colours are used one of the displayed colours is black The original game flashed the screen when time starts to run out by toggling the black pixels to white using an indexed palette. What is the best (i.e. most efficient) way to achieve this in OpenGL ES 1.1? My thoughts so far: Generate an alternative texture with white instead of black pixels, and pass to OpenGL when the screen is flashing Render a white poly underneath the background and render the texture with alpha on to display it Try and render a poly on top with some blending that achieves the effect (not sure this is possible) I'm fairly new to OpenGL so I'm not sure what the performance drawbacks of each of these are, or if there's a better way of doing this.

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• How to generate semi transparent shapes in php using gdlib

  - by fabbrillo

  Hi, this is the script i made // Create image $img = imagecreatetruecolor($w, $h); // Transparent image $white = imagecolorallocate($img,255,255,255); imagefilledrectangle($img,0,0,$w,$h,$white); imagecolortransparent($img, $white); //imagealphablending( $img, true ); //imagesavealpha( $img, true ); // Shape color $bgColor = imagecolorallocatealpha($img, 100, 250, 250, 70); imagefilledrectangle($img, 15, 20, 50, 100, $bgColor); imagefilledrectangle($img, 10, 25, 60, 100, $bgColor); imagepng($img, 'file.png'); the problem is the rectangles are transparent among them but not with the background i mean, i need to create a transparent image with a semi transparent shape inside any suggestions? thanks for your help

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• Equivalent of public static final fields in Scala

  - by JT

  I'm learning Scala, and I can't figure out how to best express this simple Java class in Scala: public class Color { public static final Color BLACK = new Color(0, 0, 0); public static final Color WHITE = new Color(255, 255, 255); public static final Color GREEN = new Color(0, 0, 255); private static final int red; private static final int blue; private static final int green; public Color(int red, int blue, int green) { this.red = red; this.blue = blue; this.green = green; } // getters, et cetera } The best I have is the following: class Color(val red: Int, val blue: Int, val green: Int) object BLACK extends Color(0, 0, 0) object WHITE extends Color(255, 255, 255) object GREEN extends Color(0, 0, 255) But I lose the advantages of having BLACK, WHITE, and GREEN being tied to the Color namespace.

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• Intersection of two querysets in django

  - by unagimiyagi

  Hello, I can't do an AND on two querysets. As in, q1 & q2. I get the empty set and I do not know why. I have tested this with the simplest cases. I am using django 1.1.1 I have basically objects like this: item1 name="Joe" color = "blue" item2 name="Jim" color = "blue" color = "white" item3 name="John" color = "red" color = "white" Is there something weird about having a many-to-many relationship or what am I missing? queryset1 = Item.objects.filter(color="blue") this gives (item1, item2) queryset2 = Item.objects.filter(color="white") this gives (item2, item3) queryset1 & queryset2 gives me the empty set [] The OR operator works fine (I'm using "|" ) Why is this so?

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• changing button tag border color

  - by rashmi

  dear all, i have loaded image in border less button tag when button is selected with tab key i get brown color rectangle around image. how do i change color of that rectangle from brown to white. and is that possible to have white rectangle with inner and outer shadow of rectangle with blue. please help. here is my code snippet. <td align=center valign=middle > <figure> <button style="background-color:black; height:160px;width:160px ; border:none"><img src="F:\rashmi\icons_tv\Help_Normal.png" > </button> <figcaption><font size="5" color="white" style="font-weight:bold"><center>help</center></font></figcaption> </figure> </td>

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• How to draw a transparent stroke (or anyway clear part of an image) on the iPhone

  - by devguy

  I have a small app that allows the user to draw on the screen with the finger. Yes, nothing original, but it's part of something larger :) I have a UIImageView where the user draws, by creating a CGContextRef and the various CG draw functions. I primarily draw strokes/lines with the function CGContextAddLineToPoint Now the problem is this: the user can draw lines of various colors. I want to give him the ability to use a "rubber" tool to delete some part of the image drawn so far, with the finger. I initially did this by using a white color for the stroke (set with the CGContextSetRGBStrokeColor function) but it did't work out...because I discovered later that the UIImage on the UIImageView was actually with transparent background, not white...so I would end up with a transparent image with white lines on it! Is there anyway to set a "transparent" stroke color...or is there any other way to clear the content of the CGContextRef under the user's finger, when he moves it? Thanks

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• Change background colour of individual elements on the fly

  - by John

  Hi, Is there a way in CSS or JQuery where I can dynamically change the background of li tags so they get slightly lighter for each element until it gets to white. For example say I had a list of 10 li elements. The first would have a red (#ff0000) background, the next one would then be a lighter shade of red, and so on and so on until we got to the last one which would have a background of white (#FFFFFF) The list can be any length and i just want the background colour to go from one colour e.g. red to another colour e.g. white. My site uses JQuery so if I have to use that I don't mind. Thanks

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• PHP - Resize an image and fill gaps of proportions with a color

  - by Kerry

  I am uploading logos to my system, and they need to fix in a 60x60 pixel box. I have all the code to resize it proportionately, and that's not a problem. My 454x292px image becomes 60x38. The thing is, I need the picture to be 60x60, meaning I want to pad the top and bottom with white each (I can fill the rectangle with the color). The theory is I create a white rectangle, 60x60, then I copy the image and resize it to 60x38 and put it in my white rectangle, starting 11px from the top (which adds up to the 22px of total padding that I need. I would post my code but it's decently long, though I can if requested. Does anyone know how to do this or can you point me to code/tutorial that does this?

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• Center four columns in CSS

  - by Ernest

  Hi everybody, I'm trying to make four columns that are centered on the frontpage. I would like it to look like this example: http://www.clutterpad.com/ My code looks like this: #bottom-container {width:100%;height:250px;position:relative;} #bottom-mid {background-color:white;} #bottom-left, #bottom-mid, #bottom-right {height:250px;} #bottom-left, #bottom-right {width:50%;float:left;} #bottom-left {background-color:white;position:absolute;top:0px;left:0px;} #bottom-right {background-color:white;position:absolute;top:0px;left:50%;} #bottom-mid {position:relative;margin:0px auto; width:1000px;z-index:2;} #column-container {width:100%; margin:20px auto;} .column {width:200px;float:left;font-size:10pt;font-family:Arial;margin:20px 10px;} But it's not working out. How should I code it to look like the example I mentioned before?

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• jQuery - OnClick, change background color for table cells

  - by andrew

  Hi all, Let me show you a demo: here it is working for only rows. its not working for cells. i want to change cells' (tds') background colors with mouse clicks. For example: a have a table, and it has 4 tds. table's background color is white. if i click to a td, a td should be red, than if i click to b, b td should be red and a td should be white again. if i click to c than, c should be red and b should be white right now. A - B C - D Can anyone help me?

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• Replace whitespaces using PHP preg_replace function ignoring quoted strings

  - by Saiful

  Look at the following string: SELECT column1 , column2, column3 FROM table1 WHERE column1 = 'text, "FROM" \'from\\\' x' AND column2 = "sample text 'where' \"where\\\" " AND ( column3 = 5 ) I need to escape unnecessary white space characters from the string like: removing white space from beginning and ending position of , ( ) etc removing newline (\r\n) and tabs (\t) But one thing. The remove process could not remove white spaces from the quoted string like: 'text, "FROM" \'from\\' x' "sample text 'where' \"where\\" " etc. i need to use the PHP function: preg_replace($pattern, $replacement, $string); So what will be the value of $pattern and $replacement where the value of $string is the given SQL.

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• Background color of the main content on the html page disappears

  - by Denis

  It just makes me go mad. I can't realize what the problem is. Please have a look at the pixeli.ca/glass. There is a home page that looks good - white background of the main content and looks good. But all the other pages don't have white background so they look not the way they should look. All the pages have the same style sheet and the same layout elements taken from 960.gs framework. It's just some kind of mystery there. What I need is to make all page look like the home page - having white background. Thanks.

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• XAML : How to change background color only in Design mode?

  - by Kave

  I have a control with white text foreground color and transparent background color. Later on this usercontrol will be added into a different control that carries the real background color. However during designing this, control due white foreground on white background in VS 2010, I can't obviously see anything. In there anyway to define a different color for just the design time? I have tried this: if (System.ComponentModel.DesignerProperties.IsInDesignTool) { LayoutRoot.Background = new SolidColorBrush(Colors.Blue); } But this doesn't work. Any tips? Thanks, Kave

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• Navigation Dropdown Text Color doesn't work in FF and IE

  - by Genadinik

  Hello, I was able to get the navigation dropdown to show the letters in a different color from the background (white in this case) in Chrome browser. But when I view the same page in IE or FF, the whole background is just all green. Here is an example of such a page: http://www.comehike.com/hikes/hikes_and_groups.php And here is the CSS code that makes the color show up white in Chrome navigation li li a {color:#white; text-decoration:none;} To see the difference, just mouse over the top right where it says "community" or "hikes" Thanks, Alex

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• Changing find to echo

  - by waszak

  This is almost good find *.txt -print0 | xargs -0 rm -f And i want to have something like that echo *.txt ./zad3.sh | xargs -l rm -f First version is good because I can delete file with white spaces but I can't use my script to select file to delete. Second version I can select files but I can't delete file with white spaces. I want to find files with end on .txt and delete some of them. zad3.sh is a script wich is returning file name if i agree to delete it rm catch the name and delete it. It works only for file without white space and special characters. Second version is better but i cant put my script inside it. find *.txt -print0| xargs -0 ./zad3.sh |xargs rm -f it works almost but i cant pass arg to rm and part of my code Thx

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• Problems making an accurate Visual Studio scheme for Vim (vim scheme specialist needed) .

  - by janoChen

  I'm trying to make an accurate Visual Studio scheme. I set hi function to blood color (#9A1102) for the "CSS function" (selector). But now the brackets with properties (id, class) in html elements also have blood color: (ironically the same color here in Stackoverflow). But I want them blue (#2902FC) e.g.: <div class="first"> <div id="nopic"> Sample of code: " Syntax highlighting hi Comment guifg=#777777 gui=none hi Todo guifg=#8f8f8f gui=none hi Constant guifg=#e5786d gui=none hi String guifg=#2902FC gui=none hi Identifier guifg=#2902FC gui=none hi Function guifg=#9A1102 gui=none hi Type guifg=#EF2811 gui=none hi Statement guifg=#9A1102 gui=none hi Keyword guifg=#9A1102 gui=none hi PreProc guifg=#2902FC gui=none hi Number guifg=#2902FC gui=none hi Special guifg=#2902FC gui=none " Bottom hi Question guifg=white gui=none hi Question ctermfg=white term=none hi ModeMsg guifg=white gui=none

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• links for 2010-04-27

  - by Bob Rhubart

  @oracletechnet: Oracle Technology Network Newsletters Revisited "You may find this hard to believe, but some analysts contend that email newsletters are still among the most preferred methods of "information awareness" by developers today. And in our experience, the numbers back it up: subscriptions to Oracle Technology Network newsletters grow organically by 15% every year, even after you take continual list cleanup into account. " -- Justin Kestelyn (tags: oracle otn newsletters developers architects) Sylvain Duloutre: Directory Services as a Web Service Sylvain Duloutre shares a WSDL file he created to deal with issues involved in XML binding generation. (tags: oracle sun wsdl webservices DSEE netbeans jdeveloper) Nick Wooler: Iron-Clad Cloud: Secure Cloud Computing "One solution to the security problem with cloud services can be overcome using Service Oriented Security. The Oracle approach to using Service Oriented Security allows developers to pull from a centralized, authoritative source of identity services. This allows developers to build security into every application from the inside-out. This is critical to ensuring this is done in a standardized manner and most importantly it allows developers to develop without being security experts." -- Nick Wooler (tags: oracle sun security cloud saas) Andy Mulholland: A week of visits; Cisco, HP, Oracle, SAP and VMware (in alphabetical order!) "I now am considering that we should be thinking about ‘clouds’ in virtual way, by which I mean that a succession of virtual ‘clouds’ will need to exist, each possessing specific characteristics that suit certain types of services. Really it’s no different to what we see with servers today. Adding a hypervisor to a server adds new flexibility, but creating a virtualised environment means much more. What I suspect will happen is that we will start to use vendor specific approaches to building what I will term a physical cloud solution using their technology and approach to supporting a specific objective, but with time we will find these physical clouds will interoperate as a fully virtualised cloud environment." -- Andy Mulholland (tags: entarch enterprisearchitecture cloudcomputing virtualization) @fteter: Highlights From The Bright Lights - Tuesday #c10 Oracle Ace Director Floyd Teter of JPL with one last wrap-up of Collaborate 10. (tags: oracle otn collaborate2010 las vegas) Rittman Mead India – Call for very good Oracle BI Developers/Architects "Now that we have an office in India and if you are interested in joining us, do drop us a line at [email protected], and we will be glad to have technical discussions with you. If you are also an Oracle BI, DW or EPM customer looking for help on projects in the Asia-Pacific region, again we’ll be pleased to hear from you and to let you know how we can help." -- Venkatakrishnan J (tags: otn oracle jobs india developers architects software)

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• Silverlight Cream for June 15, 2010 -- #882

  - by Dave Campbell

  In this Issue: Colin Eberhardt Zoltan Arvai, Marcel du Preez, Mark Tucker, John Papa, Phil Middlemiss, Andy Beaulieu, and Chad Campbell. From SilverlightCream.com: Throttling Silverlight Mouse Events to Keep the UI Responsive Colin Eberhardt sent me this link to his latest at Scott Logic... about how to throttle Silverlight -- no not that, you'd have to go to one of the *other* blogs for that :) ... this is throttling the mouse, particularly the mouse wheel to keep the UI from freezing up ... check out the demos, you'll want to read the code Data Driven Applications with MVVM Part I: The Basics Zoltan Arvai started a series of tutorials on Data-Driven Applications with MVVM at SilverlightShow... this is number 1, and it looks like it's going to be a good series to read. Red-To-Green scale using an IValueConverter Marcel du Preez has an interesting post up at SilverlightShow using an IValueConverter to do a red/yellow/green progress bar ... this is pretty cool. Infragistics XamWebOutlookBar & Caliburn With assistance from Rob Eisenburg, Mark Tucker was able to build a Caliburn sample including the Infragistics XamWebOutlookBar, and he's sharing his experience (and code) with all of us. Printing Tip – Handling User Initiated Dialogs Exceptions John Papa responded to a common printing problem by writing it up in his blog. Note this problem quite often appears during debug, so check it out... John also has a quick tip on an update to the PrintAPI in Silverlight 4. Automatic Rectangle Radius X and Y Phil Middlemiss has another great Blend post up -- this one on rounding off buttons... they look great to me, but he's looking for advice -- how about that Phil? They look great to me :) WP7 Back Button in Games Planning on selling 'stuff' in the Windows Phone Marketplace? Are you familiar with the required use of the Back Button? How about in a game? ... Andy Beaulieu discusses all this and has some code you'll want to use. Windows Phone 7 – Call Phone Number from HyperlinkButton Chad Campbell [no relation :) ] is discussing dialing a number from a hyperlink in WP7 - oh yeah, it's a phone as well :) -- I think I've only seen a number attempt to be called -- hmm... and we're not yet either because we all have emulators, but this is a good intro to the functionality for when we may actually have devices! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Première sortie pour Android 3, le successeur d'Android 2.3 intégrera une version 3D des Google Maps

  Premières sortie pour Android 3 Le successeur d'Android 2.3 intégrera une version 3D des Google MapsLors de la conférence Dive Into Mobile qui se déroule actuellement, Andy Rubin, en charge du développement d'Android, a fait lors de sa keynote une démonstration de la future version d'Android (3.0, alias Honeycomb) sur une tablette Motorola.Le fait marquant de cette présentation (l'UI pour l'instant épurée n'ayant été qu'entraperçue) fut la démonstration de la future version de Google Maps qui sortira dans les jours avenir.De cette présentation il ressort qu'au menu de la prochaine mise à jour de Google Maps nous aurons : le chargement beaucoup plus rapide des cartes ; la gestion de l'affichage de...

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• Are there any books that teach techniques for effective pair programming?

  - by Paul D. Waite

  I’ve just read the pair programming chapter of ‘Making Software’ by Andy Oram, and I’d like to try it when I next get an opportunity. The chapter mentions that in one of the studies, the subjects were initially given instruction on effective pair programming. Are there any books (or chapters of books) that I could read to get a good grounding in how to do pair programming effectively, so that I’m more prepared?

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• Silverlight Cream for March 14, 2011 -- #1060

  - by Dave Campbell

  In this Issue: Lazar Nikolov, Rudi Grobler, WindowsPhoneGeek, Jesse Liberty, Pete Brown, Jessica Foster, Chris Rouw, Andy Beaulieu, and Colin Eberhardt. Above the Fold: Silverlight: "A Silverlight Resizable TextBlock (and other resizable things)" Colin Eberhardt WP7: "Retrofitting the Trial API" Jessica Foster Shoutouts: Rudi Grobler has a post up that's not Silverlight, but it's cool stuff you may be interested in: WPF Themes now available on NuGet From SilverlightCream.com: Simulating rain in Silverlight Lazar Nikolov has a cool tutorial up at SilverlightShow... Simulating rain. Nice demo near to top, and source code plus a very nice tutorial on the entire process. Making the ApplicationBar bindable Rudi Grobler has a couple new posts up... first this one on making the WP7 AppBar bindable... he's created 2 simple wrappers that make it possible to bind to a method... with source as usual! All about Splash Screens in WP7 – Creating animated Splash Screen WindowsPhoneGeek's latest is about splash screens in WP7, but he goes one better with animated splash screens. Lots of good information including closing points in more of a FAQ-style listing. Testing Network Availability Jesse Liberty's latest is on testing for network availability in your WP7 app. This should be required reading for anyone building a WP7 app, since you never know when the network is going to be there or not. Lighting up on Windows 7 with Native Extensions for Microsoft Silverlight Pete Brown's latest post is about the Native Extensions for Microsoft Silverlight or NESL library. Pete describes what NESL is, a link to the library, installing it, and tons more information. If you wanna know or try NESL... this looks like the place to start. Retrofitting the Trial API Jessica Foster paused on the way to shipping her WP7 app to add in the trial API code. Check out what she went through to complete that task, as she explains the steps and directions she took. Good description, links, and code. WP7 Insights #2: Creating a Splash Screen in WP7 In the 2nd post in his series on WP7 development, Chris Rouw is discussing a WP7 splash screen. He gives some good external links for references then gets right into discussing his code. Air Hockey for Windows Phone 7 Andy Beaulieu shares a tutorial he wrote for the Expression Toolbox site, using the Physics Helper Library and Farseer Physics Engine -- an Air Hockey game for WP7. A Silverlight Resizable TextBlock (and other resizable things) I think Michael Washington had the best comment about Colin Eberhardt's latest outing: "Another WOW example" ... drop this in the pretty darn cool category: an attached behavior that uses a Thumb control within a popup to adorn any UI element to allow the user to resize it! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Survey: How much data do you work with?

  - by James Luetkehoelter

  Andy isn't the only one that can ask a survey question. This is something I really curious about because many of the answers or recommendations or rants in blogs are not universably applicable to every database - small databases must sometimes be treated differently, and uber databases are just a pain (and fun at the same time). So, how would you classify most of the databases you work with: 1) Up to 50GB 2) 50-500GB 3) 500GB - 2TB 4) DEAR GOD THAT"S TOO MUCH INFORMATION! Share this post: email it!...(read more)

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