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  • Is Scala ready for prime time?

    - by jayraynet
    Now that I've done a few trivial things with Scala (which I love for "hello world" and contrived applications!) I am left wondering.. part about maturity of the tools to support development, and part about general applicability. Are the toolsets ready? Is Scala appropriate for use on enterprise / business applications? Would "you" use it on a non-trivial project? Some of my (possibly unfounded) concerns would be: are the IDE and toolsets as rich as what we have to develop .net and java applications (eclipse for Scala seems limited compared to eclipse for java)? are the build / CI / testing toolsets able to effectively deal with Scala? how maintainable is the concise code that can be (encouraged?) written in the language? is it possible to find developers with Scala experience? is there enough critical mass to get help through on-line reference and books that are more than "intro" to the language? So bottom line - is the ecosystem mature enough to use now, or better off waiting to see how it evolves? EDIT: let's say "non-trivial" is a multi-year, multi-release, 10-20 developers project.

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  • Equivalent to GetTickCount() on Linux

    - by Matt Joiner
    I'm looking for an equivalent to GetTickCount() on Linux. Presently I am using Python's time.time() which presumably calls through to gettimeofday(). My concern is that the time returned (the unix epoch), may change erratically if the clock is messed with, such as by NTP. A simple process or system wall time, that only increases positively at a constant rate would suffice. Does any such time function in C or Python exist?

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  • Project generation problem using Spring Roo

    - by Harry
    Hi, I just downloaded SpringSource Tool Suite, and tried to generate a demo application using roo, but i'm getting error below Code: Created /home/dev/springsource/workspace/demo/pom.xml Undo create /home/dev/springsource/workspace/demo/pom.xml Invalid dependency scope: PROVIDED [Timer-0] NullPointerException at org.springframework.roo.classpath.itd.AbstractItdMetadataProvider.notify(AbstractItdMetadataProvider.java:84) What is the problem? is this Maven issue? Using: Ubuntu 8.10, SpringSource Tool Suite Version: 2.3.3.M1, Roo 1.1.0.M1, Apache Maven Thanks

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  • Linux based MS Office thumbnail generation

    - by El Yobo
    I've been taken on board to work on a PHP based web application. One part of the application generates thumbnail images for MS Office documents on demand, and it uses MS Office + the VeryPDF docprint utility to do this. Because of this one requirement, the system is running on Windows Server 2003 + IIS. I would prefer to have the system running on a Linux server, rather than MS, as I have far more experience in administering Linux systems than Windows and we have no other in-house technical staff. Does anyone know a way to handle the document conversion using native Linux software? I would love something PHP native, but am willing to look outside that if necessary. Thanks for your suggestions.

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  • Can't use SFML sprite drawing and OpenGL rendering at the same time

    - by Ken
    I'm using some SFML built in functions to draw sprites and text as an overlay on top of some OpenGL rending in an SFML RenderWindow. The opengl rendering appears fine until I add the code to draw the sprites or text. The sprite or text drawing causes the OpenGL stuff to disappear. The follow code show what I'm trying to do sf::RenderWindow window(sf::VideoMode(viewport.width,viewport.height,32), "SFML Window"); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0,viewport.width,0,viewport.height,0,1); while (window.pollEvent(Event)) { //event handling... //begin drawing glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_TRIANGLES); glColor3f(col.x,col.y,col.z); for(int i=0;i<3;i++) glVertex2f(pos.x+verts[i].x,pos.y+verts[i].y); glEnd(); // adding this line causes all the previous opengl triangles not to appear window.draw("Sometext"); window.display(); }

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  • RAW key generation in IOS with AES

    - by sudheer
    I am novice to the cryptography in ios . I got a requirement to convert android encryption code into IOS . Below is the android code part. I need that in IOS . Can any one please help me out in this . I need this below android code in IOS. private static byte[] getRawKey(byte[] seed) throws Exception { KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); sr.setSeed(seed); kgen.init(256, sr); SecretKey skey = kgen.generateKey(); byte[] raw = skey.getEncoded(); return raw; }

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  • Observer pattern for unpredictable observation time

    - by JoJo
    I have a situation where objects are created at unpredictable times. Some of these objects are created before an important event, some after. If the event already happened, I make the object execute stuff right away. If the event is forthcoming, I make the object observe the event. When the event triggers, the object is notified and executes the same code. if (subject.eventAlreadyHappened()) { observer.executeStuff(); } else { subject.subscribe(observer); } Is there another design pattern to wrap or even replace this observer pattern? I think it looks a little dirty to me.

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  • LightView: JavaFX 2 real-time visualizer for GlassFish

    - by arungupta
    Adam Bien launched LightFish, a light-weight monitoring and visualization application for GlassFish. It comes with a introduction and a screencast to get you started. The tool provides monitoring information about threads and memory (such as heap size, thread count, peak thread count), transactions (commits and rollbacks), HTTP sessions, JDBC sessions, and even "paranormal activity". In a recently released first part of a tri-part article series at OTN, Adam explains how REST services can be exposed as bindable set of properties for JavaFX. The article titled "Enterprise side of JavaFX" shows how a practical combination of REST and JavaFX together. It explains how read-only and dynamic properties can be created. The fine-grained binding model allows clear separation of the view, presentation, and business logic. Read the first part here.

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  • Crystal reports CSV incorrect generation

    - by yauhen
    When setting ExportFormatType.CharacterSeparatedValues crystal report generates every row of data prefixed with column names (Report Headers). Why it does this? How it could be fixed? Usually it is preferred to have single header. For excel export type - generated report looks ok (only single header for all rows). I am using crystal reports 11.5.3700.0. Visual studio 2008, .net 3.5 sp1

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  • SubSonic 2.2 Class Generation

    - by Saif Khan
    Hi, I am using SubSonic on a project with many tables which were created by a sourcecode generator. I noticed Some classes created by SubSonic were generated without code and have the folowing message The class...was not generated because ... does not have a primary key. Is there any way for me to get the code to be generated without adding keyes to all the tables? Thanks

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  • Part-time work as a beginner programmer [on hold]

    - by Valentas
    I wrote to one company near my university (starting in September) and they responded that they will probably hire me from the work I have already done (some projects and Euler problems solving). It's for 15 hours/week or so in order to not fall behind uni work. They require Python, SQL, XML and a good idea about how the Web works. The job role involves acquiring data from the Web and supplying it as search results for flight seekers (people). I am eager to learn but still, what can I do to become prepared for this? I ask because I tend to gravitate from one technology to the other, trying out things but never mastering it properly. What Web technologies are involved in such a job role? I have two months and want to learn as much as possible because there is much info but I have no idea where to start.

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  • How do you track existing requirements over time?

    - by CaptainAwesomePants
    I'm a software engineer working on a complex, ongoing website. It has a lot of moving parts and a small team of UI designers and business folks adding new features and tweaking old ones. Over the last year or so, we've added hundreds of interesting little edge cases. Planning, implementing, and testing them is not a problem. The problem comes later, when we want to refactor or add another new feature. Nobody remembers half of the old features and edge cases from a year ago. When we want to add a new change, we notice that code does all sorts of things in there, and we're not entirely sure which things are intentional requirements and which are meaningless side effects. Did someone last year request that the login token was supposed to only be valid for 30 minutes, or did some programmers just pick a sensible default? Can we change it? Back when the product was first envisioned, we created some documentation describing how the site worked. Since then we created a few additional documents describing new features, but nobody ever goes back and updates those documents when new features are requested, so the only authoritative documentation is the code itself. But the code provides no justification, no reason for its actions: only the how, never the why. What do other long-running teams do to keep track of what the requirements were and why?

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  • XSD.exe question about include files and code generation

    - by Roger Willcocks
    If you have an XSD with an includes reference. Is it possible to generate 2 separate class files. 1 for the XSD, and 1 for the included XSD? My Scenario 4 XSDs, each of which share 15-20 element definitions in common. Rather than maintaining, I'd like to end up with the 4 XSDs all referencing a fifth file with the common definitions, and code generating 5 .cs files to use.

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  • Stings Generation

    - by sikas
    Hi,I would like to know how can I create various string from some given characters eg: given characters: a, b I would like to generate the following strings: aa ab ba bb What I have thought of is having (for 2 inputs only) two for-loops one inside another, and then loop each to the number of inputs which in this case is 2 and the output strings will be 2*2 0 4 strings and as the number increases the number of output strings will increase by multiplying n*n (n-times)

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  • Asp controls Id generation inside repeater

    - by toraan
    I define some controls inside repeater itemtemplate, the problem is with the Id that are generated automatically. This is my page: <asp:Repeater ID="rptThreads" runat="server" onitemcreated="rptThreads_ItemCreated"> <HeaderTemplate> <table cellpadding="0px" cellspacing="0"> </HeaderTemplate> <ItemTemplate> <tr style="height:50px"> <td> <asp:PlaceHolder ID="plcItemTitle" runat="server"> <asp:Panel id="titleContainer" runat="server" style="position:absolute;"> <asp:HyperLink ID="lnkTitle" runat="server" style="float:left;padding-right:10px;" Text='<%# Container.DataItem%>'/> <asp:Panel id="pnlEditButtons" runat="server" Visible="false" style="vertical-align:middle;z-index:100;display:none;float:left;" > <asp:ImageButton ID="imgbtn1" runat="server" ImageUrl="~/Images/misc/edit.png" /> <asp:ImageButton ID="imgbtn2" runat="server" ImageUrl="~/Images/misc/Rename.png" /> </asp:Panel> </asp:Panel> </asp:PlaceHolder> </td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater> Now I will try to describe the problem: code-behind: protected void Page_Load(object sender, EventArgs e) { int [] array = {1,2,3,4,5}; rptThreads.DataSource = array; rptThreads.DataBind(); } protected void rptThreads_ItemCreated(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { Panel editButtonsPanel = e.Item.FindControl("pnlEditButtons") as Panel; editButtonsPanel.Visible = true; Panel containerPanel = e.Item.FindControl("titleContainer") as Panel; //Point of Interest!!!! containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');"); } } If I run the page as is, the generated html will be the following (I show only the first 2 items): <table cellpadding="0px" cellspacing="0"> <tr style="height:50px"> <td> <div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;"> <a id="lnkTitle" style="float:left;padding-right:10px;">1</a> <div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> <tr style="height:50px"> <td> <div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;"> <a id="lnkTitle" style="float:left;padding-right:10px;">2</a> <div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> As you can see all divs get the SAME ID, THIS I DONT WANT!!! But If I omit this line form the ItemCreated event: containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');"); The generated HTML will be the following: <table cellpadding="0px" cellspacing="0"> <tr style="height:50px"> <td> <div id="rptThreads_ctl01_titleContainer" style="position:absolute;"> <a id="rptThreads_ctl01_lnkTitle" style="float:left;padding-right:10px;">1</a> <div id="rptThreads_ctl01_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="rptThreads$ctl01$imgbtn1" id="rptThreads_ctl01_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="rptThreads$ctl01$imgbtn2" id="rptThreads_ctl01_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> <tr style="height:50px"> <td> <div id="rptThreads_ctl02_titleContainer" style="position:absolute;"> <a id="rptThreads_ctl02_lnkTitle" style="float:left;padding-right:10px;">2</a> <div id="rptThreads_ctl02_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="rptThreads$ctl02$imgbtn1" id="rptThreads_ctl02_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="rptThreads$ctl02$imgbtn2" id="rptThreads_ctl02_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> All divs get unique IDs, and this I do want My questions are: 1)why it happens? why this line of code messup the ids? 2)how can have the unique ID's and assign javascript in codebehind? I can add this on aspx (it will wotk and I will get unique ids): onmouseover='<%# "javascript:ShowEditButtons(\""+ Container.FindControl("pnlEditButtons").ClientID+ "\");" %>' But I must do it in codebehind because I need to set the javascript only if server validate some things.

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  • Contiguous Time Periods

    It is always better, and more efficient, to maintain referential integrity by using constraints rather than triggers. Sometimes it is not at all obvious how to do this, and the history table, and other temporal data tables, presented problems for checking data that were difficult to solve with constraints. Suddenly, Alex Kuznetsov came up with a good solution, and so now history tables can benefit from more effective integrity checking. Joe explains...

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  • Looking for a way to give acces to some programs for a limited period of time

    - by R. L.
    I install Linux on computers and add to the base installation some other programs. This computer then is sold to a customer as a larger instrument. Now, I am looking for a way to implement some kind licence for this computer so the user can use it for a year and then he would need to "renew" the licence. It is not my intention to lock the whole computer , blocking or deleting some folders should be enough. The only way I could think of was to setup a cron job that deletes my programs, or a second way would be to set the user account to expire after a year. But I give the computer with sudo privilages so the above solutions wouldn't be 100% safe. It is not my intention to encrypt any code, I just want block the possibility to execute certain programs. Is there a way or a program that would "licence the computer" ? Ideally it should be invisible to the user. After one year the program stops working and "he doesn't know why."

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  • Xubuntu LightDM shows blank screen half the time

    - by Sman789
    System info: (will be amended if any more info is asked for) My laptop runs Xubuntu 12.10. As it has a Solid State Drive, /tmp, /var/tmp, /var/log and /var/log/apt are set to tmpfs in the /etc/fstab file - in case this makes any difference. Problem My problem is quite simple. Approximately 50% of boot attempts end in the mouse cursor on a black screen (presumably LightDM failing to load), forcing me to restart and try again. I can access the CTRL+ALT+F1 terminal to reboot the machine, but it's very annoying having to boot and reboot two or three times before one works. Oh, and this problem is the same whether I use the Xubuntu or Unity greeter. Thanks for any help you can give.

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  • How to Become a SEO Expert Within a Short Time

    Do you want to become a SEO expert? If you are a small business owner, you will like to know more about the SEO techniques to give that additional boost to your business. There are some great resources which will help you to become a SEO expert.

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  • asp.net report generation - page cannot be diplayed

    - by user438640
    I have a asp.net application which generates reports.When the user clicks on generate report, the report is generated in the background and link to that report is written on the UI. There is no problem with the application as many of them are able to generate the reports successfully. However few users are facing issue is generating reports.The issue is, "When they click on generate report button, the report is being generated but before getting the link to the report,users are getting "page cannot be displayed" page" "And for few of them it occurs only in IE and not in mozila" Please help me in resolving this issue. Thanks in advance

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  • Broadcom bcm4313 Ubuntu 13.10 connection time out

    - by Wahtever
    After upgrading to Ubuntu 13.10 I keep getting connection timed out every few seconds at which point i have to disconnect and reconnect to the WiFi network. The WiFi card worked fine on 13.04 with the bcmwl-kernel-source installed but giving problems on 13.10: *-network description: Wireless interface product: BCM4313 802.11bgn Wireless Network Adapter vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: eth1 version: 01 serial: c0:14:3d:cc:c9:c7 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=wl0 driverversion=6.30.223.141 (r415941) ip=192.168.1.4 latency=0 multicast=yes wireless=IEEE 802.11abg resources: irq:17 memory:f0500000-f0503fff How can i fix this? Thanks

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