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  • Signs to Quit Programming?

    - by acidzombie24
    I was hanging out with two people and one of them had a design book and the other was talking to me about programming and design. He said he had difficulties programming and wondered what are signs that you should not or should stop programming? He wanted to know if he should stick to design and i said i didnt know since i havent seen him do either. How does one know if he or she should quit programming and stick to another discipline? and what are some signs?

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  • Implementing Brainf*ck loops in an interpreter

    - by sub
    I want to build a Brainf*ck (Damn that name) interpreter in my freshly created programming language to prove it's turing-completeness. Now, everything is clear so far (<+-,.) - except one thing: The loops ([]). I assume that you know the (extremely hard) BF syntax from here on: How do I implement the BF loops in my interpreter? How could the pseudocode look like? What should I do when the interpreter reaches a loop beginning ([) or a loop end (])? Checking if the loop should continue or stop is not the problem (current cell==0), but: When and where do I have to check? How to know where the loop beginning is located? How to handle nested loops? As loops can be nested I suppose that I can't just use a variable containing the starting position of the current loop. I've seen very small BF interpreters implemented in various languages, I wonder how they managed to get the loops working but can't figure it out.

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  • Client side page permissions - Javascript / jquery / cookies / other?

    - by Ozaki
    TLDR Using plain HTML / Javascript. Want to block access to some pages (doesn't have to be super secure just to stop some peeking eyes). I thought of simply doing this by setting a cookie for each page they are allowed to visit with a value of true but thats a bit messy. Although it would work. Is there a way to set an array of values to a cookie so I can read the cookie and if a name of a page is in there then allow access with an IF statement or so on each of my pages. If they dont have the cookie just to replace my #content (entirepage) to "sorry no" etc. For example: $.cookie("Access","page1, page2, page3",{ expires: 1 }); Am already using JQuery, Jquery cookie. etc. I am up for anyway of doing this cookie idea is just an example So what do you think would be the best / most efficient way of managing this?

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  • MVC Site - Ensuring the default entry view is always correct

    - by Klaptrap
    I have a MVC site with AD authorization. This is all working fine. I publish the site to the webserver and call the site directly (http://intranet). If I have not logged in for a while (I have an authorised cookie with a 30 minute TTL), I am prompted to log-in and if successful I am redirected to the homeController's index view. This is great and as expected. If I keep the session open (browser open) and browse away from the site, if I then browse back to http://intranet, I am not challenged as I have recently authenticated but the default page is from a different controller and not the home page view. How can I stop this from happening? It cannot be a session setting as this is not a new session and the routes appear correct - they are not beng called at this point anyhow. Please MVC guru's advise....!

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  • Cleanup for control inside a FlowDocument

    - by Thorarin
    I have a custom control that I use inside a FlowDocument. The control uses a System.Drawing.ImageAnimator to display transparent, animated GIF images. Why is this such a pain in the butt in WPF anyway? :P In my original implementation, this was causing memory leaks when a paragraph containing the control was being deleted from the document, because the ImageAnimator kept a reference to the control for event handling. I've now implemented a WeakEventManager pattern which seems to indeed fix the leak itself, but I would like to stop "OnFrameChanged" events from being fired if a particular animated GIF is not currently in the document, instead of relying on the garbage collector to eventually collect the control objects and my event manager to notice that there no longer are valid listeners to the event. Basically, I would like to take a more active role in this and have the control react to being removed from the FlowDocument. Is there some way to do this? I've been unable to find it. OnVisualParentChanged doesn't get fired, because the direct parent (a Paragraph) is unchanged.

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  • Executing AJAX scripts within an AJAX response

    - by KcYxA
    Hi there, I'm having trouble using AJAX page updates along with other AJAX scripts. During a normal page load, the AJAX scripts (picture scrolling and picture thumbnails) work fine. But when I update a page with AJAX, these scripts (usually loaded in the header of the initial page load) stop working. I am wondering if this is specific to these scripts and I need to look into them deeper to resolve/re-write or if I am missing something more generic in combining AJAX page updates with AJAX scripts the returned code relies on. Embedded javascript runs fine. Thanks for your ideas! PS: The scripts I am using are from www.dynamicdrive.com are: 1) stepcarousel (http://www.dynamicdrive.com/dynamicindex4/stepcarousel.htm) and 23) thumbnailviewer (http://www.dynamicdrive.com/dynamicindex4/thumbnail.htm) from the

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  • Starting Tornado Web

    - by picklepete
    Hi, I'm quite new to using Tornado Web as a web server, and am having a little difficulty keeping it running. I normally use Django and Nginx, and am used to start/stop/restarting the server. However with Tornado I'm having trouble telling it to "run" without directly executing my main python file for the site, ie "python ~/path/to/server.py". I'm sure I'm getting this completely wrong - is there a way of 'bootstrapping' my script so that when Nginx starts, Tornado starts? Any help would be appreciated!

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  • Stack memory in Android

    - by Matt
    I'm writing an app that has a foreground service, content provider, and a Activity front end that binds to the service and gets back a List of objects using AIDL. The service does work and updates a database. If I leave the activity open for 4-8+ hours, and go to the "Running Services" section under settings on the phone (Nexus One) an unusually large amount of memory being used is shown (~42MB). I figure there is a leak. When I check the heap memory i get Heap size:~18MB, ~2MB allocated, ~16MB free. Analyzing the hprof in Eclipse MAT seems fine, which leads me to theorize that memory is leaking on the stack. Is this even possible? If it is, what can I do to stop or investigate the leak? Is the reported memory usage on the "Running Services" section of android even correct (I assume it is)? Another note: I have been unable to reproduce this issue when the UI is not up (with only the service running)

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  • whats wrong with the following code

    - by giri
    Hi i am trying to send sms to my mobile using java.When I run the application I am getting the the follwing error. package HelloWorld; import java.io.*; import java.util.BitSet; import javax.comm.*; import java.lang.*; public class SerialToGsm { InputStream in; OutputStream out; String lastIndexRead; String senderNum; String smsMsg; SerialToGsm(String porta) { try { // CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier("serial0"); CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier(porta); SerialPort sp = (SerialPort)portId.open("Sms_GSM", 0); sp.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); sp.setFlowControlMode(sp.FLOWCONTROL_NONE); in = sp.getInputStream(); out = sp.getOutputStream(); // modem reset sendAndRecv("+++AT", 30); // delay for 20 sec/10 sendAndRecv("AT&F", 30); sendAndRecv("ATE0", 30); // echo off sendAndRecv("AT +CMEE=1", 30); // verbose error messages sendAndRecv("AT+CMGF=0", 70); // set pdu mode // sendAndRecv("AT V1E0S0=0&D2&C1", 1000000); } catch (Exception e) { System.out.println("Exception " + e); System.exit(1); } } private String sendAndRecv(String s, int timeout) { try { // clean serial port input buffer in.skip(in.available()); System.out.println("=> " + s); s = s + "\r"; // add CR out.write(s.getBytes()); out.flush(); String strIn = new String(); for (int i = 0; i < timeout; i++){ int numChars = in.available(); if (numChars > 0) { byte[] bb = new byte[numChars]; in.read(bb,0,numChars); strIn += new String(bb); } // start exit conditions // --------------------- if (strIn.indexOf(">\r\n") != -1) { break; } if (strIn.indexOf("OK\r\n") != -1){ break; } if (strIn.indexOf("ERROR") != -1) { // if find 'error' wait for CR+LF if (strIn.indexOf("\r\n",strIn.indexOf("ERROR") + 1) != -1) { break; } } Thread.sleep(100); // delay 1/10 sec } System.out.println("<= " + strIn); if (strIn.length() == 0) { return "ERROR: len 0"; } return strIn; } catch (Exception e) { System.out.println("send e recv Exception " + e); return "ERROR: send e recv Exception"; } } public String sendSms (String numToSend, String whatToSend) { ComputSmsData sms = new ComputSmsData(); sms.setAsciiTxt(whatToSend); sms.setTelNum(numToSend); // sms.setSMSCTelNum("+393359609600"); // SC fixed String s = new String(); s = sendAndRecv("AT+CMGS=" + (sms.getCompletePduData().length() / 2) + "\r", 30); // System.out.println("==> AT+CMGS=" + (sms.getCompletePduData().length() / 2)); // System.out.println("<== " + s); if (s.indexOf(">") != -1) { // s = sendAndRecv(sms.getSMSCPduData() + sms.getCompletePduData() + "\u001A"); // usefull one day? // System.out.println("Inviero questo >>>> " + sms.getCompletePduData()); // if this sintax won't work try remove 00 prefix s = sendAndRecv("00" + sms.getCompletePduData() + "\u001A", 150); // System.out.println("<== " + s); return s; } else { return "ERROR"; } } // used to reset message data private void resetGsmObj() { lastIndexRead = null; senderNum = null; smsMsg = null; } public String checkSms (){ String str = new String(); String strGsm = new String(); strGsm = sendAndRecv("AT+CMGL=0", 30); // list unread msg and sign them as read // if answer contain ERROR then ERROR if (strGsm.indexOf("ERROR") != -1) { resetGsmObj(); return strGsm; // error } strGsm = sendAndRecv("AT+CMGL=1", 30); // list read msg // if answer contain ERROR then ERROR if (strGsm.indexOf("ERROR") != -1) { resetGsmObj(); return strGsm; // error } // evaluate message index if (strGsm.indexOf(':') <= 0) { resetGsmObj(); return ("ERROR unexpected answer"); } str = strGsm.substring(strGsm.indexOf(':') + 1,strGsm.indexOf(',')); str = str.trim(); // remove white spaces // System.out.println("Index: " + str); lastIndexRead = str; // find message string // ------------------- // look for start point (search \r, then skip \n, add and one more for right char int startPoint = strGsm.indexOf("\r",(strGsm.indexOf(":") + 1)) + 2; int endPoint = strGsm.indexOf("\r",startPoint + 1); if (endPoint == -1) { // only one message endPoint = strGsm.length(); } // extract string str = strGsm.substring(startPoint, endPoint); System.out.println("String to be decoded :" + str); ComputSmsData sms = new ComputSmsData(); sms.setRcvdPdu(str); // SMSCNum = new String(sms.getRcvdPduSMSC()); senderNum = new String(sms.getRcvdSenderNumber()); smsMsg = new String(sms.getRcvdPduTxt()); System.out.println("SMSC number: " + sms.getRcvdPduSMSC()); System.out.println("Sender number: " + sms.getRcvdSenderNumber()); System.out.println("Message: " + sms.getRcvdPduTxt()); return "OK"; } public String readSmsSender() { return senderNum; } public String readSms() { return smsMsg; } public String delSms() { if (lastIndexRead != "") { return sendAndRecv("AT+CMGD=" + lastIndexRead, 30); } return ("ERROR"); } } ERROR: Error loading SolarisSerial: java.lang.UnsatisfiedLinkError: no SolarisSerialParallel in java.library.path Caught java.lang.UnsatisfiedLinkError: com.sun.comm.SolarisDriver.readRegistrySerial(Ljava/util/Vector;Ljava/lang/String;)I while loading driver com.sun.comm.SolarisDriver Exception javax.comm.NoSuchPortException

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  • jquery repeat process once get reply from php file

    - by air
    i have one php file which process adding of record in Database fro array. for example in array i have 5 items aray an='abc','xyz','ert','wer','oiu' i want to call one php file in j query ajax method um = an.split(','); var counter = 0; if(counter < uemail.length) { $("#sending_count").html("Processing Record "+ ecounter +" of " + an.length); var data = {uid: um[counter] $.ajax({ type: "POST", url: "save.php", data: data, success: function(html){ echo "added"; counter++; } what it do, it complete all the prcess but save.php is still working what i want after one process it stop untill process of save.php complete then it wait for next 10 sec and start adding of 2nd element. Thanks

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  • Django Haystack exact filtering

    - by blackrobot
    I have a haystack search which has the following SearchIndex: class GrantIndex(indexes.SearchIndex): """ This provides the search index for the Grant application. """ text = indexes.CharField(document=True, use_template=True) year = indexes.IntegerField(model_attr='year__year') date = indexes.DateField(model_attr='date') program = indexes.CharField(model_attr='program__area') grantee = indexes.CharField(model_attr='grantee') amount = indexes.IntegerField(model_attr='amount') site.register(Grant, GrantIndex) If I want to search filtering out any programs that ARE NOT 'Health', I run the following query: from haystack.query import SearchQuerySet sqs = SearchQuerySet() sqs = sqs.filter(program='Health') Unfortunately, this also produces objects from the program 'Health\Other' and 'Health\Cardiovascular'. How do I stop the search from allowing those other programs in? I run Ubuntu 9.10 with Xapian as my search back-end.

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  • dojo datagrid will make the page "jump" when sorting is changed

    - by Select0r
    Hi, I have a Dojo Datagrid in one of my pages (which contains more content) and the following problem occurs: As soon as I click on a column header to change the sorting, the page will jump up as if I clicked on some HTML-anchor. Funny enough, the page jump will make the grid show only the first two rows after it jumped, instead of (e.g.) have the grid start at the top of the page after the jump, which is the expected behaviour if an anchor is used. The problem occurs in different browsers (tested: Firefox 3.6, Opera 10, IE6), so I guess it might be a Dojo-problem/-bug. Any ideas to make this annoying behaviour stop? Greetings, Select0r PS: this seems to describe a similar problem, only for JQuery (and unfortunately without a solution, too)

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  • jquery issue, disable on mouseenter queue

    - by jason
    When you mouseenter .li_group class it does a slide down effect on 1 single <li> tag, everything goes smoothly, but during the delay if you take your mouse off and on .li_group it "queues" the effect and slides the li down, delay, slides it down again etc etc... I have tried every way i can think of, even stop(); but it still does it... the reason i use mouseenter instead of hover, is because it works better for ul / li list $(".li_group").live('mouseenter',function(){ var id = "#ec1"; $(id).slideDown(); }).live('mouseleave',function(){ if (jQuery.support.cssFloat==true || getInternetExplorerVersion() > 7) { //ie < 8 endless up/down on close var id = "#ec1"; $(id).delay(5000).slideUp('fast'); } });

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  • How to simulate different CPU frequency and limit RAM

    - by user351103
    Hi I have to build a simulator with C#. This simulator should be able to run a second thread with configureable CPU speed and limited RAM size, e.g. 144MHz and 50 MB. Of course I know that a simulator can never be as accurate as the real hardware. But I try to get almost similar performance. At the moment I'm thinking about creating a thread which I will stop/sleep from time to time. Depending on the desired CPU speed the simulator should adjust the sleep time of this thread and therefore simulate different cpu frequency. To measure the achieved speed I though about using PerformanceCounters. But with this approach I have the problem that I don't know how to limit the RAM size the thread could use. Do you have any ideas how to realize such a simulator? Thanks in advance!!

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  • jQuery event.stopPropagation is not working on <a>

    - by HorusKol
    I have the following javascript: $('#ge-display').click(function (event) { window.open('/googleearth/ge-display.php','','scrollbars=yes,menubar=no,height=650,width=1000,resizable=yes,toolbar=yes,location=no,status=no'); event.stopPropagation(); return false; }); the element with id 'ge-display' is a standard link: <a href="/googleearth/ge-display.php" id="ge-display" target="_blank">Load Google Earth Plugin (in a new window)</a> The problem is - when I take out the 'return false;' line from the click event handler, the javascript popup opens, and then another browser window opens - I thought stopPropagation() would prevent the links own click handler? I've also tried stopImmediatePropagation() - but I still need to return false to stop the default behaviour of the link.

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  • Dealing with unwanted port numbers on localhost when debugging in Visual Studio

    - by Dan Bailiff
    So when I'm trying to debug a project in Visual Studio, I'll often have 1 or more services that I need to call. These services are separate projects and I'll launch them in separate instances of VS. ASP dev server kindly launches them with temporary port numbers attached. This would be fine except for my programs are looking for an IP without a port attached. (Typically it's as simple as "localhost"!) I've coped by using web config settings and changing the xml to use the port number while debugging. This still doesn't always work and occasionally I'll still have to fudge it and insert port numbers as strings in code! UGH! Then I have to remember to undo all the port herding code before deployment... I want to stop doing this: string _strBaseURL = String.Format("http://{0}:2277", ConfigurationManager.AppSettings["myservice_ip"].ToString()); What is the best practice here? Am I doomed to port herding while debugging VS apps?

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  • How to set AeDebug to get a minidump with the name of the process ?

    - by JC Martin
    I have to perform some post mortem debugging on a C++ project. Known way to perform is to set the cdb debugger as a minidump generator and to process the dumps collects afterwards. I read nearly the whole web and I didn't find a solution to produce a minidump with the name of the process that has crashed Is there a way to set AeDebug\Debugger registry variable in such a manner that cdb generates a dump file with the name of the process ? When I encapsulate the call to cdb.exe in a batch file, it starts well but stays blocked on the symbol searching. I must perform a Ctrl+C in order to stop the batch, then the minidump, with the correct process name, is created... but of course I can't set up such a thing in an unattended production environment... Has anybody done that before ?

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  • NSMutableUrlRequest eats plus signs

    - by Mike
    I create NSMutableUrlRequest for sending data to server, add all necessary fields to it and then add the string for sending like this: [theRequest setHTTPBody:[postString dataUsingEncoding: NSUTF8StringEncoding]]; postString is a usual NSString. The problem is, when I receive this request at the server, all the plus (+) signs disappear from the http body. So if I had "abcde+fghj" on iPhone, I get "abcde fghj" on the server". Can this be some encoding problem from using dataUsingEncoding: NSUTF8StringEncoding? Or some NSMutableUrlRequest stripping feature? What can I do to make it stop stripping plus signs? I need to receive UTF8 strings at the server side.

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  • Problem with View - it does not refresh after db update

    - by crocodillez
    Hi, I am working with small ASP.NET MVC project - online store. I have addToCart method which adds selected product to cart - it updates cart table in my db and showing cart view with its content. But I have problems. While db is updating correctly the view does not. I see that quantity of the product in my db is incremented correctly but quantity in view is not changed. I have to stop debugging my app in visual studia and restart it - then my view is showing correct data. What can be wrong?

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  • How to debug Java code when using ANT script in Eclipse

    - by zengr
    Hi, I have a java class and I need to debug it (put breakpoints and continue using F6). I am using ANT script to init, build, deploy and run the code. I am using: <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true" debuglevel="lines,vars,source"> .......... </javac> But when I place the breakpoint in a line in my foo.java class and I run the ant script (the run part, Right Click on run--Debug As--Ant Build), Eclipse does not stop at that line of code. What am I missing out?!

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  • Is there something like "if not exist create sequence ..." in Oracle SQL?

    - by Timo
    Very probably a noob question: For my application that uses an Oracle 8 DB, I am providing an SQL script to setup stuff like triggers, sequences etc., which can be copied and pasted into SQL*Plus. I would like the script to not stop with an error if a sequence that I am trying to create already exists. For a Trigger this can easily be done using "create or replace trigger ...", but for a sequence this does not work. Is there some alternative, like "if not exists mysequence then create sequence ..." (I tried this but it did not work :) ) Alternatively, if this is not possible, is there a way to do a "drop sequence mysequence" without SQL*Plus aborting the script if mysequence does not exist? Thanks. PS: I wish Oracle just had a simple Autoinc field type ... sigh.

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  • unresolved external symbol __penter referenced in function _WspiapiStrdup@4

    - by John Weldon
    I started getting this compile error after upgrading to Visual Studio 2010. Not sure if it's related, but I can't figure out what library to reference to satisfy this dependency? Is it just an API change bug or something? Microsoft (R) Program Maintenance Utility Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. del wstest.res wstest.obj wstest.pdb wstest.ilk wstest.exe wstest.exe.manifest vc90.pdb cl -Gh -Ox -DNDEBUG -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_X86_=1 -DWIN32 -D_WIN32 -W3 -D_WINNT -D_WIN32_WINNT =0x0501 -DNTDDI_VERSION=0x05010000 -D_WIN32_IE=0x0600 -DWINVER=0x0501 -D_MT -D_DLL -MDd wstest.c wstest.c link /DEBUG /DEBUGTYPE:cv -out:wstest.exe wstest.obj Ws2_32.lib Shlwapi.lib Microsoft (R) Incremental Linker Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. wstest.obj : error LNK2019: unresolved external symbol __penter referenced in function _WspiapiStrdup@4 wstest.exe : fatal error LNK1120: 1 unresolved externals NMAKE : fatal error U1077: '"c:\program files (x86)\microsoft visual studio 10.0\vc\bin\link.EXE"' : return code '0x460' Stop.

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  • GDB says that a KVO observer is registered even though it is not (or is it?).

    - by Paperflyer
    When my application is closed, the main controller class removes itself as Observer from the model and then releases the model. Like this: - (void)dealloc { [theModel removeObserver:self forKeyPath:@"myValue"]; [theModel release]; [super dealloc]; } And right after that, the debugger says: 2010-04-29 14:07:40.294 MyProgram[13678:a0f] An instance 0x116f2e880 of class TheModel was deallocated while key value observers were still registered with it. Observation info was leaked, and may even become mistakenly attached to some other object. Set a breakpoint on NSKVODeallocateBreak to stop here in the debugger. Here's the current observation info: <NSKeyValueObservationInfo 0x100288450> ( <NSKeyValueObservance 0x1002aca90: Observer: 0x116f40ec0, Key path: myValue, Options: <New: YES, Old: NO, Prior: NO> Context: 0x0, Property: 0x116f80430> ) where 0x116f2e880 is indeed the model and 0x116f40ec0 is indeed the controller. How can the controller still be an observer when it just removed itself as an observer?

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  • jQuery show div click to hide then do not show again

    - by Jonny Wood
    I am using jQuery to hide a div on my page: $(document).ready(function(){ $('#message').hide(); When a certain part of the page scrolls into view the div shows using $(window).scroll(function() { var top = 0; top = $(window).scrollTop(); if((top >= 1000) && (top < 2000)){ $('#message').fadeIn('slow'); } } I want to add a close button to this as follows $('a#message-hide').click(function() { $('#message').hide('fast'); return false; All good so far but the part I cannot figure out is how to then STOP the div re-appearing when the user scrolls back to the trigger position on the page...?

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  • Scope of the Pages in a Silverlight application

    - by AngryHacker
    I have an app built with the Silverlight Navigation Application Template. I have a main form (e.g. MainPage.xaml) and a bunch of Silverlight Pages, which are swapped in and out of the main content area. In the MainPage.xaml, I have a DispatcherTimer which hits some Uri resources, regardless of which page I am on. Every now and then, it will inexplicably stop firing. I have an inkling that it has to do with the scope of various pages. Can pages inside the MainPage.xaml take away the scope from its parent? Or is this something much simpler?

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