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  • Java class object from type variable

    - by Alexander Temerev
    Is there a way to get Class object from the type variable in Java generic class? Something like that: public class Bar extends Foo<T> { public Class getParameterClass() { return T.class; // doesn't compile } } This type information is available at compile time and therefore should not be affected by type erasure, so, theoretically, there should be a way to accomplish this. Does it exist?

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  • Using mx.charts in a Flex Hero mobile project

    - by Alexander Farber
    Hello, Adobe states that Charts are supported in mobile projects but when I try to change the following working files (created project with File - New - Flex Mobile Project - Google Nexus One): MyTest.mxml: <?xml version="1.0" encoding="utf-8"?> <s:MobileApplication xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" firstView="views.MyTestHome"> <s:navigationContent> <s:Button label="Home" click="navigator.popToFirstView();"/> </s:navigationContent> <s:actionContent/> </s:MobileApplication> MyTestHome.mxml: <?xml version="1.0" encoding="utf-8"?> <s:View xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" title="Test Chart"> </s:View> to the new MyTestHome.mxml: <?xml version="1.0" encoding="utf-8"?> <s:View xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark" title="Test Chart"> <fx:Script> <![CDATA[ import mx.collections.*; [Bindable] private var medalsAC:ArrayCollection = new ArrayCollection( [ {Country: "USA", Gold: 35, Silver:39, Bronze: 29 }, {Country:"China", Gold: 32, Silver:17, Bronze: 14 }, {Country:"Russia", Gold: 27, Silver:27, Bronze: 38 } ]); ]]> </fx:Script> <mx:PieChart id="chart" height="100%" width="100%" paddingRight="5" paddingLeft="5" color="0x323232" dataProvider="{medalsAC}" > <mx:series> <mx:PieSeries labelPosition="callout" field="Gold"> <mx:calloutStroke> <s:SolidColorStroke weight="0" color="0x888888" alpha="1.0"/> </mx:calloutStroke> <mx:radialStroke> <s:SolidColorStroke weight="0" color="#FFFFFF" alpha="0.20"/> </mx:radialStroke> <mx:stroke> <s:SolidColorStroke color="0" alpha="0.20" weight="2"/> </mx:stroke> </mx:PieSeries> </mx:series> </mx:PieChart> </s:View> and also add c:\Program Files\Adobe\Adobe Flash Builder Burrito\sdks\4.5.0\frameworks\libs\datavisualization.swc c:\Program Files\Adobe\Adobe Flash Builder Burrito\sdks\4.5.0\frameworks\libs\sparkskins.swc c:\Program Files\Adobe\Adobe Flash Builder Burrito\sdks\4.5.0\frameworks\libs\mx\mx.swc to Flex Build Path (clicking "Add SWC" button): Then it fails with the error: Could not resolve to a component implementation. Does anybody please have an idea here? Alex

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  • How to use Apache ivy to resolve dependency with multiple files?

    - by Alexander
    Here is my ivy.xml: <?xml version="1.0" encoding="UTF-8"?> <ivy-module version="2.0"> ... <dependencies> <dependency org="spring" name="richclient" rev="1.1.0"/> </dependencies> </ivy-module> And ivy-settings.xml: <property name="ivy.local.default.root" value="/home/---/dev/Java/_libraries/_ivy" override="false"/> <property name="ivy.local.default.ivy.pattern" value="[organisation]/[module]/[revision]/[type]s/[artifact].[ext]" override="false"/> <property name="ivy.local.default.artifact.pattern" value="[organisation]/[module]/[revision]/[type]s/[artifact].[ext]" override="false"/> <resolvers> <filesystem name="local"> <ivy pattern="${ivy.local.default.root}/${ivy.local.default.ivy.pattern}" /> <artifact pattern="${ivy.local.default.root}/${ivy.local.default.artifact.pattern}" /> </filesystem> </resolvers> Ivy try to find /home/---/dev/Java/_libraries/_ivy/spring/richclient/1.1.0/jars/richclient.jar And here is the problem. Library has 4 jar files. How to include all jars in project from one dependency in ivy.xml? Thx

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  • INSERT and transaction serialization in PostreSQL

    - by Alexander
    I have a question. Transaction isolation level is set to serializable. When the one user opens a transaction and INSERTs or UPDATEs data in "table1" and then another user opens a transaction and tries to INSERT data to the same table, does the second user need to wait 'til the first user commits the transaction?

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  • How does loop address alignment affect the speed on Intel x86_64?

    - by Alexander Gololobov
    I'm seeing 15% performance degradation of the same C++ code compiled to exactly same machine instructions but located on differently aligned addresses. When my tiny main loop starts at 0x415220 it's faster then when it is at 0x415250. I'm running this on Intel Core2 Duo. I use gcc 4.4.5 on x86_64 Ubuntu. Can anybody explain the cause of slowdown and how I can force gcc to optimally align the loop? Here is the disassembly for both cases with profiler annotation: 415220 576 12.56% |XXXXXXXXXXXXXX 48 c1 eb 08 shr $0x8,%rbx 415224 110 2.40% |XX 0f b6 c3 movzbl %bl,%eax 415227 0.00% | 41 0f b6 04 00 movzbl (%r8,%rax,1),%eax 41522c 40 0.87% | 48 8b 04 c1 mov (%rcx,%rax,8),%rax 415230 806 17.58% |XXXXXXXXXXXXXXXXXXX 4c 63 f8 movslq %eax,%r15 415233 186 4.06% |XXXX 48 c1 e8 20 shr $0x20,%rax 415237 102 2.22% |XX 4c 01 f9 add %r15,%rcx 41523a 414 9.03% |XXXXXXXXXX a8 0f test $0xf,%al 41523c 680 14.83% |XXXXXXXXXXXXXXXX 74 45 je 415283 ::Run(char const*, char const*)+0x4b3 41523e 0.00% | 41 89 c7 mov %eax,%r15d 415241 0.00% | 41 83 e7 01 and $0x1,%r15d 415245 0.00% | 41 83 ff 01 cmp $0x1,%r15d 415249 0.00% | 41 89 c7 mov %eax,%r15d 415250 679 13.05% |XXXXXXXXXXXXXXXX 48 c1 eb 08 shr $0x8,%rbx 415254 124 2.38% |XX 0f b6 c3 movzbl %bl,%eax 415257 0.00% | 41 0f b6 04 00 movzbl (%r8,%rax,1),%eax 41525c 43 0.83% |X 48 8b 04 c1 mov (%rcx,%rax,8),%rax 415260 828 15.91% |XXXXXXXXXXXXXXXXXXX 4c 63 f8 movslq %eax,%r15 415263 388 7.46% |XXXXXXXXX 48 c1 e8 20 shr $0x20,%rax 415267 141 2.71% |XXX 4c 01 f9 add %r15,%rcx 41526a 634 12.18% |XXXXXXXXXXXXXXX a8 0f test $0xf,%al 41526c 749 14.39% |XXXXXXXXXXXXXXXXXX 74 45 je 4152b3 ::Run(char const*, char const*)+0x4c3 41526e 0.00% | 41 89 c7 mov %eax,%r15d 415271 0.00% | 41 83 e7 01 and $0x1,%r15d 415275 0.00% | 41 83 ff 01 cmp $0x1,%r15d 415279 0.00% | 41 89 c7 mov %eax,%r15d

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  • Empty page instead of custom tomcat error page

    - by Alexander
    My setting: Apache 2.2 + Tomcat 6.0 @ Windows 2008 R2 64bit static webpages: / servlet: /foo tomcat and apache are connected by mod_jk 404.jsp is placed in tomcat\webapps\ROOT tomcat\conf\web.xml: <error-page> <error-code>404</error-code> <location>/404.jsp</location> </error-page> apache\conf\extra\httpd-ssl.conf: JkMount /foo/* worker1 JkMount /404.jsp worker1 When I open https://...../404.jsp my custom error page is displayed. But when I open https://...../foo/nonexisting.html an empty page is displayed. If I remove the <error-page>...</error-page> code from web.xml and open https://...../foo/nonexisting.html then tomcats own 404 is displayed. Any hints?

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  • ID not recognized in .ascx page

    - by Alexander
    I have the following code: <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="DurationPicker.ascx.cs" Inherits="Permias.DurationPicker" %> <%@ Register TagPrefix="Club" Namespace="ClubSite" %> <div class="controlblock"> <table> <tr> <td> Start Date: </td> <td> <Club:DatePicker ID="dp1" runat="server" /> </td> <td> <Club:TimePicker ID="tp1" runat="server" /> </td> </tr> <tr> <td> End Date: </td> <td> <Club:DatePicker ID="dp2" runat="server" /> </td> <td> <Club:TimePicker ID="tp2" runat="server" /> </td> </tr> </table> </div> In my code behind I have public System.DateTime startDateTime { get { return dp1.SelectedDate.Add(tp1.SelectedTime.TimeOfDay); } set { dp1.SelectedDate = value; tp1.SelectedTime = value; } } However dp1 is underlined in red, which means it can't find dp1.. why is this?

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  • Mapping Hilbert values to 3D points

    - by Alexander Gladysh
    I have a set of Hilbert values (length from the start of the Hilbert curve to the given point). What is the best way to convert these values to 3D points? Original Hilbert curve was not in 3D, so I guess I have to pick by myself the Hilbert curve rank I need. I do have total curve length though (that is, the maximum value in the set). Perhaps there is an existing implementation? Some library that would allow me to work with Hilbert curve / values? Language does not matter much.

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  • Keeping track of business rules within IT department?

    - by evaldas-alexander
    I am looking for the best way to keep track of the business rules for both developers and everybody else (support staff / management) in a startup enviroment. The challenge is that our business model requires quite a lot of different business rules, which are created pretty much on the fly and evolving organically after that. After running this project for 3+ years, we have so many of such rules that often the only way to be sure about what the application is supposed to do in a certain situation is to go find the module responsible for that process and analyze its code and comments. That is all fine as long as you have one single developer who created the entire application from the scratch, but every new developer needs to go over pretty much entire codebase in order to understand how the application works. Even bigger problem is that non technical employees don't even have that option and therefore are forced to ask me pretty much every day how some certain case would be handled by the application. Quick example - we only start charging for our customer campaigns once they have been active for at least 72 hours, but at the same time we stop creating invoices for campaigns that belong to insolvent accounts and close such accounts within a month of the first failed charge. That does not apply to accounts that are set to "non-chargeable" which most commonly belongs to us since we are using the service ourselves. The invoices are created on the 1st of each month and include charges from the previous month + any current balance that the account might have. However, some customers are charged only 4 days after their invoice has been generated due to issues with their billing department. In addition to that, invoices are also created when customer deactivates his campaign, but that can only be done once the campaign is not longer under mandatory 6 month contract, unless account manager approves early deactivation. I know, that's quite a lot of rules that need to be taken into account when answering a question "when do we bill our customers", but actually I could still append an asterisk at the end of each sentence in order to disclose some rare exceptions. Of course, it would be easiest just to keep the business rules to the minimum, but we need to adapt to changing marketplace - i.e. less than a year ago we had no contracts whatsoever. One idea that I had so far was a simplistic wiki with categories corresponding to areas such as "Account activation", "Invoicing", "Collection procedures" and so on. Another idea would be to have giant interactive flowchart showing the entire customer "life cycle" from prospecting to account deactivation. What are your experiences / suggestions?

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  • Cross-Browser CSS3 Rule

    - by Alexander Corotchi
    I have a stupid question, If I want to add round corner for an element in browsers which support some stuff of CSS3, I have to repeat style several time for each browser, because it is different ? For ex : -moz-border-radius: 12px; /* FF1+ */ -webkit-border-radius: 12px; /* Saf3+, Chrome */ border-radius: 12px; /* Opera 10.5, IE 9 */ It means, that I have to add 3 styles for this radius border, doesn't it ?

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  • weird stuff with asp.net button CSS class

    - by Alexander
    I have the following button: <Club:RolloverButton runat="server" ValidationGroup="Login1" Text="Login" ID="LoginButton" CommandName="Login" CssClass="links" /> .links { display: block; width: 96px; padding: 2px 0px 2px 0px; background: #A53602; text-align: center; text-transform: uppercase; font-size: 10px; color: #FFFFFF; } When this button shows up the first time it shows the style correctly, however if I hover my mouse over this button the layout turns into a standard button, why is that??

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  • Drupal 7: cancel user registration if a wrong field value has been submitted.

    - by Alexander Farber
    Hello, I have a Drupal 7 with 1 field added to registration form - a List with possible values Robot / Male / Female: # select * from field_data_field_gender; entity_type | bundle | deleted | entity_id | revision_id | language | delta | field_gender_value -------------+--------+---------+-----------+-------------+----------+-------+-------------------- user | user | 0 | 6 | 6 | und | 0 | Male user | user | 0 | 5 | 5 | und | 0 | Male user | user | 0 | 7 | 7 | und | 0 | Female user | user | 0 | 1 | 1 | und | 0 | Male The first value Robot is a default value - to prevent SPAM robots from registering at my site. Is there a way to cancel user registration, when a new user submits the registration web form with the default Robot value? (i.e. only Male and Female values are allowed). I've looked at the core Trigger module, but don't see anything suitable there. I've looked at the hook_user_presave and hook_user_insert API docs, but don't see a way there to cancel an ongoing user registration. (I was expecting to do that by returning a special value from those methods...) Thank you! Alex

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  • Change TreeNode image on expand-collapse events

    - by Alexander Stalt
    I have a treeView with many nodes. I want that some nodes change their image when node collapsed/expanded. How can I do it ? Unfortunately, TreeNode don't have properties like ExpandNodeImage, CollapseNodeImage \ TreeView can change very often, so nodes can be deleted/added.. i can delete child nodes and so on... Maybe, there is a class like ExpandAndCollapseNode ?

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  • How to know strong name of GWT serialization policy at the time of host page generation?

    - by Alexander Vasiljev
    There is an excellent article describing a way to embed GWT RPC payload into the host page. A key element is missing there is how to know Strong Name of RPC serialization policy at run time. Strong Name is computed at the compile time, put into the client and obfurscated. Strong name is sent to the server with RPC request as described here. What would you suggest to make this parameter available at the time of host page generation?

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  • problem with image gallery using fancybox jquery

    - by Alexander
    I am trying to use fancybox for one of my image galery and my code is the following.. this is the code for my Gallery.aspx where it inherits from a master page... For some reason it doesn't work.. can you guys tell me what the problem is? <%@ Page Title="" Language="C#" MasterPageFile="~/Global.Master" AutoEventWireup="true" CodeBehind="Gallery.aspx.cs" Inherits="Permias.Gallery" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <script src="jquery.js" type="text/javascript"></script> <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="./fancybox/jquery.fancybox-1.3.1.pack.js"></script> <script type="text/javascript" src="./fancybox/jquery.easing-1.3.pack.js"></script> <script type="text/javascript" src="./fancybox/jquery.mousewheel-3.0.2.pack.js"></script> <link rel="stylesheet" href="./fancybox/jquery.fancybox-1.3.1.css" type="text/css" media="screen" /> </asp:Content> <asp:Content ID="Content3" ContentPlaceHolderID="splash" runat="server"> <div id="splash">&nbsp;</div> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <a class="grouped_elements" rel="group1" href="http://farm5.static.flickr.com/4058/4252054277_f0fa91e026.jpg"><img src="http://farm5.static.flickr.com/4058/4252054277_f0fa91e026.jpg" alt=""/></a> </asp:Content>

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  • Override transparency color when converting transparent PNG to JPG

    - by Alexander Malfait
    I'm using Dragonfly to generate thumbnail images in a Rails app. I'm serving all picture images as JPG's. Now the client is uploading transparent PNG files, like this one: http://www.ibanez.co.jp/products/images/eg2010/ART120_TRF_12_02.png Dragonfly uses RMagick to convert these images to JPG. The problem is that it converts the PNG images to JPG with a black background, and my site's design requires a white background. I've tried to override it like this: encoded_image = Magick::Image.from_blob(image.data).first if encoded_image.format.downcase == format image # do nothing else encoded_image.format = format encoded_image.background_color = "white" encoded_image.transparent_color = "white" encoded_image.to_blob end But the produced JPG images still contain a black background. Does anyone know how to beat RMagick into using a white background when converting the transparent layer? I know I could just serve as PNG, but then the images are 10 times as large, and the site is already pretty bandwidth heavy.

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  • [bash] Escape a string for sed search pattern

    - by Alexander Gladysh
    In my bash script I have an external (received from user) string, which I should use in sed pattern. REPLACE="<funny characters here>" sed "s/KEYWORD/$REPLACE/g" How can I escape the $REPLACE string so it would be safely accepted by sed as a literal replacement? NOTE: The KEYWORD is a dumb substring with no matches etc. It is not supplied by user.

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  • "Finally" target for MSBuild

    - by Paul Alexander
    Is there a way to run a certain target after all other targets have been run regardless of their success or failure? try...finally equivalent in MsBuild is related, but only deals with a small group of targets. I need something for the whole package with dozens of sub builds.

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  • pg.so problem with Ruby in Windows

    - by Alexander
    I have installed the pg module with help of gem install pg Which returned Successfully installed pg-0.8.0-x86-mswin32-60 When a .rb-file looks like this require 'rubygems' require 'pg' I get an LoadError (exception 126) which tells me that it can't find the module C:/Ruby/lib/ruby/gems/1.8/gems/pg-0.8.0-x86-mswin32-60/lib/pg.so. I heard something about that it is a Linux compilation. I'm really stuck so I really welcome suggestions. I have also installed PostgreSQL, I use Windows XP.

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  • alternative to strdup

    - by Alexander
    I am using strdup here to copy the value of the parameter name into nm in the constructor... is there an alternative of achieving the same result without using strdup and without using the C++ STL library and using the keyword new instead? Book::Book(const char *name, int thickness, int weight):nm(NULL), thck(thickness), wght(weight){ if(name) nm = strdup(name); } class Book { private: char* nm; .......... ............ .......... ........... };

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  • gdb: Cannot find new threads: generic error

    - by Alexander Gladysh
    When I run GDB against a program which loads a .so which is linked to pthreads, GDB reports error "Cannot find new threads: generic error". I probably miss something in my Ubuntu configuration (as it was installed from minimal install). Any clues? $ gdb --args lua -lluarocks.require GNU gdb (GDB) 7.0-ubuntu Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/lua...(no debugging symbols found)...done. (gdb) run Starting program: /usr/bin/lua -lluarocks.require Lua 5.1.4 Copyright (C) 1994-2008 Lua.org, PUC-Rio require 'ev' [Thread debugging using libthread_db enabled] Cannot find new threads: generic error (gdb) q A debugging session is active. Inferior 1 [process 4986] will be killed. Quit anyway? (y or n) y This function gets called on require 'ev': http://github.com/brimworks/lua-ev/blob/master/lua_ev.c#L25-65 Additional information about my system: $ uname -a Linux localhost 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 04:38:19 UTC 2010 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 9.10 Release: 9.10 Codename: karmic

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  • UITableView becomes invisible after changing data in it

    - by Alexander Shemshurenko
    Hi I have application with TabBar that control several views. In one view i control connection to different servers.Each server provides different set of items. I display these items in UITableView on other view. I create table view like this UITableView * aTableView = [[UITableView alloc] initWithFrame:CGRectMake(X,Y,Width,Height) style:UITableViewStyleGrouped]; [[self view] addSubview:aTableView]; aTableView.da taSource = self; The problem is that Table view displayed ok first time , but if i go back to view number one and change server(changing list of items that should be displayed in table view), table view becomes invisible for some reason. If i tap on the screen in place where it should be, its becomes visible again. Ive tried to call to reloadData and setNeedDisplay in viewWillAppear of the UIViewController that hosts this table view, but without success. Any advice? Thanks

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