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• Auto save, filter applied screen shots

  - by DUKE

  Unlike Windows, it is very easy to take screen shots of selected area of the screen in Ubuntu. But I am researching how to have the following features when taking screen shots of the selected area: (1) The final output should be automatically saved to a location, for example on the desktop. (This feature is available in Mac OSX) (2) A filter (such as drop down shadow) should be automatically applied to the image. The above should happen as soon as the selection is done, without poping up any dialogs and expecting any inputs from the user.

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• Minecraft help?

  - by Michael Duke

  I have tried several ways to get Minecraft to work I have had no results. I would much appreciate help. i have tried downloading it from Minecraft.net changing the permission and running it in terminal it crashed the second it opened so manually opened it from terminal using cd and bash commands it then said michael@MichaelsLaptop:~$ cd Downloads michael@MichaelsLaptop:~/Downloads$ bash Minecraft_Installer_20.sh Minecraft_Installer_20.sh: line 1: syntax error near unexpected token newline' Minecraft_Installer_20.sh: line 1:'

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• Java Spotlight Episode 138: Paul Perrone on Life Saving Embedded Java

  - by Roger Brinkley

  Interview with Paul Perrone, founder and CEO of Perrone Robotics, on using Java Embedded to test autonomous vehicle operations for the Insurance Institute for Highway Safety that will save lives. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News JDK 8 is Feature Complete Java SE 7 Update 25 Released What should the JCP be doing? 2013 Duke's Choice Award Nominations Another Quick update to Code Signing Article on OTN Events June 24, Austin JUG, Austin, TX June 25, Virtual Developer Day - Java, EMEA, 10AM CEST Jul 16-19, Uberconf, Denver, USA Jul 22-24, JavaOne Shanghai, China Jul 29-31, JVM Summit Language, Santa Clara Sep 11-12, JavaZone, Oslo, Norway Sep 19-20, Strange Loop, St. Louis Sep 22-26 JavaOne San Francisco 2013, USA Feature Interview Paul J. Perrone is founder/CEO of Perrone Robotics. Paul architected the Java-based general-purpose robotics and automation software platform known as “MAX”. Paul has overseen MAX’s application to rapidly field self-driving robotic cars, unmanned air vehicles, factory and road-side automation applications, and a wide range of advanced robots and automaton applications. He fielded a self-driving autonomous robotic dune buggy in the historic 2005 Grand Challenge race across the Mojave desert and a self-driving autonomous car in the 2007 Urban Challenge through a city landscape. His work has been featured in numerous televised and print media including the Discovery Channel, a theatrical documentary, scientific journals, trade magazines, and international press. Since 2008, Paul has also been working as the chief software engineer, CTO, and roboticist automating rock star Neil Young’s LincVolt, a 1959 Lincoln Continental retro-fitted as a fully autonomous extended range electric vehicle. Paul has been an engineer, author of books and articles on Java, frequent speaker on Java, and entrepreneur in the robotics and software space for over 20 years. He is a member of the Java Champions program, recipient of three Duke Awards including a Gold Duke and Lifetime Achievement Award, has showcased Java-based robots at five JavaOne keynotes, and is a frequent JavaOne speaker and show floor participant. He holds a B.S.E.E. from Rutgers University and an M.S.E.E. from the University of Virginia. What’s Cool Shenandoah: A pauseless GC for OpenJDK

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• Save 10% when you by this Java mascot stress toy

  - by hinkmond

  That's right! Attention Java online shoppers! We have a blue-light special for a limited time. Buy a squishy Duke stress reliever toy and get 10% off. See: Java mascot stress toy Here's a quote: Polyfoam stress toy is shaped like Java mascot, Duke. 2-1/4" x 3-1/2" x 1-3/4". Custom mold. Red/White/Black. Stress Reliever Toy? Now, why would you be stressed out if you're a Java technology fan..? Don't answer that. Hinkmond

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• Java Magazine????7???

  - by sasa

  11?20??Java Magazine????7?????????? ?7???????????????? ?????Java DUKE’S CHOICE AWARDS BlueJ?????????????????????? Web??????????????????????????? Project Lambda??? Java HotSpot VM??????(2):????????????????? NIO.2??????·????API??? Java EE Connector Architecture 1.6 Payment API—JSR 229?? Oracle Berkeley DB Java Edition?Java API(???2) ???????JavaFX????????? Graal??? JavaFX Media API????????? ?????????????????????????????????????????? Java Magazone?????????Java??????????????Java Developer Newsletter???????????????????????????12?31?????????????1,000???Java??????Duke?????????????????????

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• UnsupportedOperationException on Collection

  - by Duke Vador

  While studying the Collection API, we find that some methods (add, remove,...) may throw a java.lang.UnsupportedOperationException if the current implementation of the Collection does not support those functionalities. Is there,actually, in the JDK, a concrete Collection that does not support those methods ? Thanks a lot for your answers.

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• Collection, which method is used to authorize an add of an element ?

  - by Duke Vador

  We find a lot of concrete subclasses under Collection. While trying to add an element in a concrete collection, this collection will use a method to determine if it can accept to store the element (and eventually that this element is not already in the collection). It could use equals(), hashCode() or compareTo() of the element. Is it possible to find a summary about which method is used by each implementation of Collection ? Thanks a lot for your answers.

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• Mac does not recognize wide screen

  - by DUKE

  I am using Mac OS X Lion 10.7.4 on my Mac mini, with Samsung monitor with default resolution 1360 x 768. My Mac mini is connected to Samsung VGA port by Apple mini port to VGA adapter. When starting, my Mac does not recognize the wide screen resolution and always starts in a 4:3 mode, (but it shows 1360x768 as the resolution in the settings). I have to do one of the following actions to bring my Mac to the wide screen resolution: (1) Changing to some other resolution and bring back to the default resolution. (2) Unplug the Apple mini port to VGA adapter and re-connect again. (3) Put the machine to sleep and wake it up again. I am using Ubuntu 12.04, (in a different partition) in the same hardware, but Ubuntu is perfectly recognizing the display.

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• SFTP: file symlinks in a jailed (chrooted) directory

  - by Kevin Duke

  I'm trying to set up sftp so that a few trusted people can access/edit/create some files. I have jailed a user into their home directory (/home/name) but have run into a problem. I want for them to also be able to access other parts of the VPS because it is also a game server, webhost, etc, and I want for them to be able to have full control of files outside their jailed directory. I tried making a symlink (ln -s) to the desired directory but it does not work, as expected. I tried (cp -rl) to the files that I wanted to give access and it worked -- they can edit the files in their directory and it changes the one stored outside of jail. BUT they cannot create new files (they can but it won't update outside of jail). I know I'm probably not doing this the "right way" but what can I do to do what I want?

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• Resolving "not found" messages after doing ./configure building node.js

  - by duke

  Hello I am trying to install node.js on debian AMD64. I got node.js from git. When I do ./configure a bunch of "checking for program" messages say "not found". I want to resolve all these and ensure everything needed is present. Can anyone suggest what I need to do to resolve the "not found" messages? Thanks heaps. server:/devel/node# ./configure Checking for program g++ or c++ : /usr/bin/g++ Checking for program cpp : /usr/bin/cpp Checking for program ar : /usr/bin/ar Checking for program ranlib : /usr/bin/ranlib Checking for g++ : ok Checking for program gcc or cc : /usr/bin/gcc Checking for gcc : ok Checking for library dl : yes Checking for library execinfo : not found Checking for openssl : not found Checking for function SSL_library_init : yes Checking for header openssl/crypto.h : yes Checking for library rt : yes --- libeio --- Checking for library pthread : yes Checking for function pthread_create : yes Checking for function pthread_atfork : yes Checking for futimes(2) : yes Checking for readahead(2) : yes Checking for fdatasync(2) : yes Checking for pread(2) and pwrite(2) : yes Checking for sendfile(2) : yes Checking for sync_file_range(2) : yes --- libev --- Checking for header sys/inotify.h : yes Checking for function inotify_init : yes Checking for header sys/epoll.h : yes Checking for function epoll_ctl : yes Checking for header port.h : not found Checking for header poll.h : yes Checking for function poll : yes Checking for header sys/event.h : not found Checking for header sys/queue.h : yes Checking for function kqueue : not found Checking for header sys/select.h : yes Checking for function select : yes Checking for header sys/eventfd.h : not found Checking for SYS_clock_gettime : yes Checking for library rt : yes Checking for function clock_gettime : yes Checking for function nanosleep : yes Checking for function ceil : yes Checking for fdatasync(2) with c++ : yes 'configure' finished successfully (1.479s) server:/devel/node#

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• Getting PHP to work with apache to run .php files through browser

  - by Kevin Duke

  I have VPS running Debian 5.0 (I think) and I would like to get it to run PHP files. I was told it needed to be configured with Apache. I tried entering the command apt-get install apache2 php5 libapache2-mod-php5. But there was no change. Console output: http://pastebin.com/sVMWq6mA This is everything in my /etc/apache2/mods-enabled: http://img35.imageshack.us/img35/6474/modsb.jpg My webserver can be accessed here: http://206.217.223.136/test/ In my test.php file I have the code : <?php phpinfo(); ?> but instead of displaying the page, it tries to download it. How can I fix this?

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• Getting ajaxterm to work on Debian Lenny

  - by Kevin Duke

  I've been knocking my head out for a while on this one and have read many tutorials, but I just can't get this to work. Ajaxterm, is a webbased SSH client; once installed apt-get install ajaxterm and then enabling it with /etc/init.d/ajaxterm start I should be able to access the SSH terminal with http://mywebsite:8022/ But doing so only gives me a "Page not found", any suggestions? My actual VPS is: http://173.244.205.160 My sources: https://secure.kitserve.org.uk/content/setting-ajaxterm-Ubuntu-and-Debian-powerpc http://wiki.kartbuilding.net/index.php/ajaxterm

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• How can I internationalize strings representing C# enum values?

  - by Duke

  I've seen many questions and answers about mapping strings to enums and vice-versa, but how can I map a series of localized strings to enums? Should I just create an extension method like this that returns the proper string from a resource file? Is there a way to localize attributes (like "Description") that are used in solutions like this? Which is the preferred solution - extension method or attributes. It seems to me that this isn't the intended purpose of attributes. In fact, now that I think about it, if I were to use an extension method an attribute seems like something I'd use to specify a key in a resource file for the localized string I want to use in place of the enum value. EDIT - example: Given the following enum, public enum TransactionTypes { Cheque = 1, BankTransfer = 2, CreditCard = 3 } I would like a way to map each type to a localized string. I started off with an extension method for the enum that uses a switch statement and strongly typed references to the resource file. However, an extension method for every enum doesn't seem like a great solution. I've started following this to create a custom attribute for each enumerated value. The attribute has a base name and key for the resource file containing localized strings. In the above enum, for example, I have this: ... [EnumResourceAttribute("FinancialTransaction", "Cheque")] Cheque = 1, ... Where "FinanacialTransaction" is the resx file and "Cheque" is the string key. I'm trying to create a utility method to which I could pass any value from any enumeration and have it return the localized string representation of that value, assuming the custom attribute is specified. I just can't figure out how to dynamically access a resource file and a key within it.

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• How can I access the group of a linq group-by query from a nested repeater control?

  - by Duke

  I'm using a linq group by query (with two grouping parameters) and would like to use the resulting data in a nested repeater. var dateGroups = from row in data.AsEnumerable() group row by new { StartDate = row["StartDate"], EndDate = row["EndDate"] }; "data" is a DataTable from an SqlDataAdapter-filled DataSet. "dateGroups" is used in the parent repeater, and I can access the group keys using Eval("key.StartDate") and Eval("key.EndDate"). Since dateGroups actually contains all the data rows grouped neatly by Start/End date, I'd like to access those rows to display the data in a child repeater. To what would I set the child repeater's DataSource? I have tried every expression in markup I could think of; I think the problem is that I'm trying to access an anonymous member (and I don't know how.) In case it doesn't turn out to be obvious, what would be the expression to access the elements in each iteration of the child repeater? Is there an expression that would let me set the DataSource in the markup, or will it have to be in the codebehind on some event in the parent repeater?

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• Simple Java calculator

  - by Kevin Duke

  Firstly this is not a homework question. I am practicing my knowledge on java. I figured a good way to do this is to write a simple program without help. Unfortunately, my compiler is telling me errors I don't know how to fix. Without changing much logic and code, could someone kindly point out where some of my errors are? Thanks import java.lang.*; import java.util.*; public class Calculator { private int solution; private int x; private int y; private char operators; public Calculator() { solution = 0; Scanner operators = new Scanner(System.in); Scanner operands = new Scanner(System.in); } public int addition(int x, int y) { return x + y; } public int subtraction(int x, int y) { return x - y; } public int multiplication(int x, int y) { return x * y; } public int division(int x, int y) { solution = x / y; return solution; } public void main (String[] args) { System.out.println("What operation? ('+', '-', '*', '/')"); System.out.println("Insert 2 numbers to be subtracted"); System.out.println("operand 1: "); x = operands; System.out.println("operand 2: "); y = operands.next(); switch(operators) { case('+'): addition(operands); operands.next(); break; case('-'): subtraction(operands); operands.next(); break; case('*'): multiplication(operands); operands.next(); break; case('/'): division(operands); operands.next(); break; } } }

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• Do FormViews not respond to commands issued from an ImageButton?

  - by Duke

  I am using ImageButtons in place of LinkButtons in a FormView to issue New/Edit/Delete/Cancel commands, but they don't seem to have an effect on the FormView. The ImageButtons will cause a postback but the FormView mode doesn't change from the current mode. I'm sure the ImageButtons were working at one point, but I've been busy with other pages for a while. The only thing that's changed between now and then are some patches I installed in Visual Studio. I haven't been able to find any information related to this issue other than this: http://www.codeproject.com/KB/webforms/TamingTheFormView.aspx In that article there's an onclick method for an ImageButton that's used to change the FormView mode. Would that be the only way to use ImageButtons instead of LinkButtons in a FormView?

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• Any simple approaches for managing customer data change requests for global reference files?

  - by Kelly Duke

  For the first time, I am developing in an environment in which there is a central repository for a number of different industry standard reference data tables and many different customers who need to select records from these industry standard reference data tables to fill in foreign key information for their customer specific records. Because these industry standard reference files are utilized by all customers, I want to reserve Create/Update/Delete access to these records for global product administrators. However, I would like to implement a (semi-)automated interface by which specific customers could request record additions, deletions or modifications to any of the industry standard reference files that are shared among all customers. I know I need something like a "data change request" table specifying: user id, user request datetime, request type (insert, modify, delete), a user entered text explanation of the change request, the user request's current status (pending, declined, completed), admin resolution datetime, admin id, an admin entered text description of the resolution, etc. What I can't figure out is how to elegantly handle the fact that these data change requests could apply to dozens of different tables with differing table column definitions. I would like to give the customer users making these data change requests a convenient way to enter their proposed record additions/modifications directly into CRUD screens that look very much like the reference table CRUD screens they don't have write/delete permissions for (with an additional text explanation and perhaps request priority field). I would also like to give the global admins a tool that allows them to view all the outstanding data change requests for the users they oversee sorted by date requested or user/date requested. Upon selecting a data change request record off the list, the admin would be directed to another CRUD screen that would be populated with the fields the customer users requested for the new/modified industry standard reference table record along with customer's text explanation, the request status and the text resolution explanation field. At this point the admin could accept/edit/reject the requested change and if accepted the affected industry standard reference file would be automatically updated with the appropriate fields and the data change request record's status, text resolution explanation and resolution datetime would all also be appropriately updated. However, I want to keep the actual production reference tables as simple as possible and free from these extraneous and typically null customer change request fields. I'd also like the data change request file to aggregate all data change requests across all the reference tables yet somehow "point to" the specific reference table and primary key in question for modification & deletion requests or the specific reference table and associated customer user entered field values in question for record creation requests. Does anybody have any ideas of how to design something like this effectively? Is there a cleaner, simpler way I am missing? Thank you so much for reading.

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• Wrapbootstrap integration

  - by Shaun Frost Duke Jackson

  Good Afternoon All, I'm having trouble integrating this template into my rails application. I've changes all the images and loaded all the files into their relevant areas. However they still have the subdirectories. Does anyone know of a guide I can walk through which might explain how you do this, especially to include the revolution-slider which has a whole subdirectory of CSS and images. Template being used: https://wrapbootstrap.com/theme/pixma-responsive-multipurpose-template-WB0B348C6 Thanks for the help.

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• Web Deployment Project failed to map path for include virtual

  - by Duke

  I am building my site with a web deployment project but the build fails with a number of errors all relating to the "#include virtual" directives in my master page. The includes are necessary to import a set of centrally managed html template files. Here is an example of the include directive and associated error: <!-- #include virtual="/v3/sits/pdpdev/assets-templates/inc/head.html" --> /PDPRegistration.csproj/Pages/ContentPage.Master(15): error ASPPARSE: Failed to map the path '/v3/sits/pdpdev/assets-templates/inc/head.html'. The error for each included file actually appears multiple times. I'm not sure what is being mapped or why, but this was never a problem until I started using WDP (which I wanted to alter web.config depending on the build environment, among other things.) The project is built locally on my PC and then copied to the web server via a mapped drive. I found a few solutions on the 'net involving IIS metabase - they weren't quite clear to me, and I'm not sure if they apply given how I build and deploy the project (that is, would I have to build on the same system as IIS in order to make use of the metabase?) Can anyone suggest how I can get my project to build with WDP?

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• Java: What does the colon (:) operator do?

  - by Kevin Duke

  I would look it up myself, but I don't even know what it's called. Would anyone mind explaining what it does? Thanks!

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• Java: += equivalence

  - by Kevin Duke

  Super quick question to refresh my mind: Is: x -= y; equivalent to: x = x - y; Thanks!

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• How can I limit asp.net control actions based on user role?

  - by Duke

  I have several pages or views in my application which are essentially the same for both authenticated users and anonymous users. I'd like to limit the insert/update/delete actions in formviews and gridviews to authenticated users only, and allow read access for both authed and anon users. I'm using the asp.net configuration system for handling authentication and roles. This system limits access based on path so I've been creating duplicate pages for authed and anon paths. The solution that comes to mind immediately is to check roles in the appropriate event handlers, limiting what possible actions are displayed (insert/update/delete buttons) and also limiting what actions are performed (for users that may know how to perform an action in the absence of a button.) However, this solution doesn't eliminate duplication - I'd be duplicating security code on a series of pages rather than duplicating pages and limiting access based on path; the latter would be significantly less complicated. I could always build some controls that offered role-based configuration, but I don't think I have time for that kind of commitment right now. Is there a relatively easy way to do this (do such controls exist?) or should I just stick to path-based access and duplicate pages? Does it even make sense to use two methods of authorization? There are still some pages which are strictly for either role so I'll be making use of path-based authorization anyway. Finally, would using something other than path-based authorization be contrary to typical asp.net design practices, at least in the context of using the asp.net configuration system?

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• Does SQL Server 2005 error message numbers back to the asp.net application?

  - by Duke

  I'd like to get the message number and severity level information from SQL Server upon execution of an erroneous query. For example, when a user attempts to delete a row being referenced by another record, and the cascade relationship is "no action", I'd like the application to be able to check for error message 547 ("The DELETE statement conflicted with the REFERENCE constraint...") and return a user friendly and localized message to the user. When running such a query directly on SQL Server, the following message is printed: Msg 547, Level 16, State 0, Line 1 <Error message...> In an Asp.Net app is this information available in an event handler parameter or elsewhere? Also, I don't suppose anyone knows where I can find a definitive reference of SQL Server message numbers?

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• How can I use Linq to create an array of dictionaries from XML?

  - by Duke

  Given the following XML structure: <courses> <course> <title>foo</title> <description>bar</description> </course> ... </courses> How could I create an array of dictionaries such that each dictionary contains all the element/value pairs within a course? What I have right now generates an array whose elements contain a single key/value dictionary for each element/value pair in a course: XElement x = XElement.Parse("...xml string..."); var foo = (from n in x.Elements() select n) .Elements().ToDictionary(y => y.Name, y => y.Value); Produces: [0] => {[course, foo]} [1] => {[description, bar]} What I'd like is this: [0] => {[course, foo], [description, bar]}

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• How can I execute an insert with data from a repeater-generated form whose data source is SQL?

  - by Duke

  I'm storing multilingual data in a database whose model is language normalized (like this). For this particular problem the key for the table in question consists of a value entered by the user and a language from the language table. I'd like to dynamically generate a form with input fields for all available languages. The user inputs a key value then goes down a list of field sets filling out the information in each language. In this case there are two fields for every language, a name and a value (the value is language dependent.) I have all existing information displayed on the page with a gridview, below which I have a formview that is always in insert mode allowing the user to enter new data. Within the formview I have a repeater with an SQLDataSource that gets a list of available languages: <asp:Repeater ID="SessionLocaleRepeater" runat="server" DataSourceID="LocaleSQLDataSource" EnableViewState="false"> <ItemTemplate> <tr> <th scope="row"><%# DataBinder.Eval(Container.DataItem, "LocaleName") %></th> <td>Name:</td> <td><asp:TextBox ID="TextBox1" runat="server" Text="" /></td> <td>Number:</td> <td><asp:TextBox ID="TextBox2" runat="server" Text="" /></td> </tr> </ItemTemplate> </asp:Repeater> I figured that in order to insert this data I'd have to execute my sql server insert stored procedure for each item in the repeater; I am trying to use the formview inserting event. The problem is that the repeater isn't databound to the SQLDataSource until after the formview inserting event (inserting event is in PostBackEvent and databind is in PreRender), which means the controls and data are not available when the inserting event is fired. I tried databinding the repeater during the formview inserting event; the controls were available but the data was not. Would this have something to do with how/when the viewstate information is re-added to the controls? From what I've read, Viewstate is one of the first things to be restored. Given the order of events how can I get the data I need for the insert? I'm open to other solutions to creating dynamic input controls, but they will have to query the database to determine how many sets of controls to create.

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