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  • Loading a Reusable UITableViewCell from a Nib

    - by Greg Martin
    I am able to design custom UITableViewCells and load them just fine using the technique described in the thread found at http://forums.macrumors.com/showthread.php?t=545061. However, using that method no longer allows you to init the cell with a reuseIdentifier which means you have to create whole new instances of each cell at every call. Has anyone figured out a good way to still cache particular cell types for reuses, but still be able to design them in Interface Builder?

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  • Erlang-style light-weight processes in .NET

    - by alexey
    Is there any way to implement Erlang-style light-weight processes in .NET? I found some projects that implement Erlang messaging model (actors model). For example, Axum. But I found nothing about light-weight processes implementation. I mean multiple processes that run in a context of a single OS-thread or OS-process.

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  • Why Joda DateTimeFormatter cannot parse timezone names ('z')

    - by dimitrisli
    From DateTimeFormatter javadoc: Zone names: Time zone names ('z') cannot be parsed. Therefore timezone parsing like: System.out.println(new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy").parse("Fri Nov 11 12:13:14 JST 2010")); cannot be done in Joda: DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE MMM dd HH:mm:ss z yyyy"); System.out.println(dtf.parseDateTime("Fri Nov 11 12:13:14 JST 2010")); //Exception in thread "main" java.lang.IllegalArgumentException: Invalid format: "Fri Nov 11 12:13:14 JST 2010" is malformed at "JST 2010" //at org.joda.time.format.DateTimeFormatter.parseDateTime(DateTimeFormatter.java:673)

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  • Will a ScheduledExecutorService create new threads as needed?

    - by Matt Ball
    I'm using Executors.newScheduledThreadPool() to create a ScheduledExecutorService, specifying the number of threads like so: int corePoolSize = 42; ScheduledExecutorService foo = Executors.newScheduledThreadPool(corePoolSize); According to the JavaDocs, the corePoolSize argument sets the number of threads to keep in the pool, even if they are idle. Does this mean that this ExecutorService implementation may create more than corePoolSize threads as needed, similar to a cached thread pool?

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  • Distributed sequence number generation?

    - by Jon
    I've generally implemented sequence number generation using database sequences in the past. e.g. Using Postgres SERIAL type http://neilconway.org/docs/sequences/ I'm curious though as how to generate sequence numbers for large distributed systems where there is no database. Does anybody have any experience or suggestions of a best practice for achieving sequence number generation in a thread safe manner for multiple clients?

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  • What are shared by multi threads in the same process?

    - by skydoor
    I found that each thread still has its own registers. Also has its own stack, but other threads can read and write the stack memory. My questions, what are shared by the multi threads in the same process? What I can imagine is 1) address space of the process; 2) stack, register; 3) variables Can any body elaborate it and add more?

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  • How can I build multiple processes with TBB?

    - by Jackie
    Now I plan to parallelize my sequential solver. I hope I could run several copies of my solver(maybe with different parameters) in parallel simultaneously on a multi-core computer. can I do this with TBB? The reason I ask this question is that the book says: do not introduce anything in your code that will not allow single-thread execution. Any experts can explain this issue? Thanks.

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  • Eventlet and locking

    - by TheDude
    Since Eventlet uses green threading and asynchronous I/O, do I still need to set locks before accessing objects? My understanding is that greenlets are all part of one thread and locking isn't necessary. Can anyone confirm or deny this?

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  • How to handle input and parameter validation between layers?

    - by developr
    If I have a 3 layer web forms application that takes user input, I know I can validate that input using validation controls in the presentation layer. Should I also validate in the business and data layers as well to protect against SQL injection and also issues? What validations should go in each layer? Another example would be passing a ID to return a record. Should the data layer ensure that the id is valid or should that happen in BLL / UI?

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  • JavaScript - Why does google-maps wait until jquery finishes download?

    - by Teddyk
    I'm using the following Google Maps autload (asynchronous) to load asynchronous both Google Maps v3 and JQuery, like so: <script type="text/javascript" src="http://www.google.com/jsapi?autoload={ "modules":[ {name:"maps",version:3,other_params:"sensor=false"},{"name":"jquery","version":"1.4.2"},{"name":"jqueryui","version":"1.8.1"} ]}"></script> However, looking at the network traffic, it appears that it is not downloading asynchronously. Question: Does anyone understand why the %7Bcommon (google-maps) file is being delayed from download until the jquery-ui.min file completes download first?

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  • Datatable binding to a form is not working

    - by saurabh
    Hi All i am having a form which are having 4 lables and these lables value are displayed in the 4 textboxs, i am using MVVM and binding these textboxs with the Datatble which is coming through the typed dataset not the problem here is when i add a new row in the datatable with default values of columns and update ui by calling onpropertychanged event from my viewmodel , these values are not getting reflected on the form. Before adding a new row in the table , i am removing all previous rows and then add. TIA. Saurabh

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  • Servlet IOException when streaming a Byte Array

    - by MontyBongo
    I occasionally get an IOException from a Servlet I have that writes a byte array to the outputstream in order to provide a file download capability. This download servlet has a reasonable amount of traffic (100k hits a month) and this exception occurs rarely, around 1-2 times a month. I have tried recreating the exception by using the exact same Base64 String and no exception is raised and the Servlet behaves as designed. Is this IO Exception being caused by something outside my applications control? For example a network issue or the user resetting the connection? I have tried to google the cause of an IOException at this point in the stack but to no avail. The environment is running Tomcat 5.5 on CentOS 5.3 with an Apache HTTP Server acting as a proxy using proxy_ajp. ClientAbortException: java.io.IOException at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBufferjava:366) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:352) at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:392) at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:381) at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89) at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:83) at com.myApp.Download.doPost(Download.java:34) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) at com.myApp.EntryServlet.service(EntryServlet.java:278) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.myApp.filters.RequestFilter.doFilter(RequestFilter.java:16) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:444) at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:472) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1286) at java.lang.Thread.run(Thread.java:636) Caused by: java.io.IOException at org.apache.coyote.ajp.AjpAprProcessor.flush(AjpAprProcessor.java:1200) at org.apache.coyote.ajp.AjpAprProcessor$SocketOutputBuffer.doWrite(AjpAprProcessor.java:1285) at org.apache.coyote.Response.doWrite(Response.java:560) at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBufferjava:361) And the code in the Download Servlet: @Override protected void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException { try { response.setContentType("application/pdf"); response.setHeader("Pragma", ""); response.setHeader("Cache-Control", ""); response.setHeader("Content-Disposition", "Inline; Filename=myPDFFile..pdf"); ServletOutputStream out = response.getOutputStream(); byte[] downloadBytes = Base64.decode((String)request.getAttribute("fileToDownloadBase64")); out.write(downloadBytes); } catch (Base64DecodingException e) { e.printStackTrace(); response.getOutputStream().print("An error occurred"); } }

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  • Implementation code of native methods

    - by Tapas Bose
    At first I want to let you know that this question is not related with What is native implementation in Java. I got many useful information from that thread. I want to know that are the codes of the native implementations available? I have jdk source code but I can not find the native codes for System.currentTimeMillis or Runtime.getRuntime().availableProcessors() or other native method. Thanks and regards.

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  • Getting GPU clock speeds with SetupDiEnumDeviceInfo

    - by user157078
    Hi everyone! I posted a question earlier regarding obtaining GPU clock speeds, but I guess the thread appeared as already answered since someone had replied to it. I'd been advised by one of your members to try extracting GPU clock speeds using SetupDiEnumDeviceInfo. However, I looked around at some examples, like this one: http://www.codeproject.com/KB/system/DevMgr.aspx and nothing seemed to be displayed about the clock speed. Could someone please elaborate on how to achieve this, if at all possible? Thanks again

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  • Changing custom cell appearance when entering editing mode

    - by Nava Carmon
    Hi, I have a table with custom cells, that I built in IB. When entering editing mode, content of all cells is moved to show delete edit control. My question is where can I adjust the cell appearance before entering editing mode? I saw that willBeginEditingRowAtIndexPath function is supposed to let adjust the UI, but seems I don't get there at all. Please help, TIA

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  • Accessing the MSP and PSP registers of the Cortex-M3 in C/C++ code using Keil's µVision

    - by Captain NedD
    I need to access the MSP and PSP registers (the main and process stack registers) of the Cortex-M3 processor. I'm writing in C/C++. The µVision and associated compiler doesn't let you do inline assembly for this Thumb-2 only core (and I'm not sure that'd be such a good idea anyway). I need to do this so that I can extract the immediate value of an svc instruction regardless of whether it was executed while in thread or handler mode. Thanks,

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  • Set HTML dropdown selected option using JSTL

    - by sarah
    In the same context i have another query ${productSubCategoryList} and the corresponding setting in request is like for(int i=0;i } here i have multiple select drop down ,even though i get the return value from for as two ,in the UI only one data is getting higlighted not the second one,What is wrong in the code ?

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  • Are there old versions of Windows UX guidelines somewhere?

    - by Camilo Martin
    Since I've read Windows User Experience Interaction Guidelines (there's a PDF download avaliable) I've found it to be admirably self-deprecating, humbly pointing out their own horrible UI practices long scolded by Joel Spolsky. I'd like to know, however, what they had in mind while they made those mistakes. Is this (terrific) UX Guidelines document something new, or were there previous issues of such? If so, where can I find them? My prayers to Google yielded no leniency.

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