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  • Virtual Memory and Paging

    - by Kenshin
    Hello, I am doing some exercices to understand how the virtual memory and paging works, my question is as follows : Suppose we use a paged memory with pages of 1024 bytes, the virtual address space is of 8 pages but the physical memory can only contain 4 frames of pages. Replacement policy is LRU. What is the physical address in main memory that corresponds to virtual address 4096? and how do you get to that result? Same thing as question 1 but with virtual address 1024 A page fault occurs when accessing a word in page 0, which page frame will be used to receive the virtual page 0? Page Image

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  • difference between a lexical, morphological and semantic mistakes?

    - by AnH
    Hi there, I just want to make sure that I understood the differences between a lexical, morphological and semantic mistakes correctly. If am not mistaken semantic mistakes deal with problems concerning meanings, for example writing a sentence that is correct grammar wise but doesn't make any sense is a semantic mistake, morphological mistakes deals more or less on how the word should look like, for example childrenS is a morphological mistake, so that leaves lexical mistakes, what are those exactly?? can someone sum up the differences between those 3 mistakes please so that I may know for sure that I got them down correctly? Thank you in advance

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  • Change a localized InfoPlist.strings using an Xcode target

    - by nevan
    Here's an obscure problem. I'm using an InfoPlist.strings to localize my app name. It's only got one value: CFBundleDisplayName = "Mon App". The strings file is localized (putting it in a directory for that localization). I've just made an extra target, where I change things like the non-localized app name (different Info.plists), and the icon. I'm also changing the Default.png using a run script build phase (copying different files depending on the app type I'm building). I've tried using the script to copy different versions of my InfoPlist.strings, but I couldn't make it work. Here's what I used: if($TARGET_NAME == "MonApp")then cp fr.lproj/MonApp_InfoPlist.strings fr.lproj/InfoPlist.strings endif I've seen a post suggesting wincent strings util for processing strings, but wanted to see if there's an easy way to do this. Any help greatly appreciated.

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  • Jetty 7 Continuations: How to *not* redispatch the request?

    - by Don Werve
    I'm using Jetty 7 continuations to implement some asynchronous processing. What I'm trying to do is start off the continuation (via .suspend()), and then hand the continuation off to some other object that will compose the response, which works fine. But Jetty keeps redispatching the response (with isInitial = false) to the servlet, and I don't want or need that, because the response is being dealt with by some other object. So, I'd like to find a way to explicitly not redispatch the request on timeout or expire, because I'm using an event-driven series of callbacks to actually produce the response.

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  • How do I give MacPorts privileges?

    - by cojadate
    I tried to install PostgreSQL server development libraries using MacPorts and got the following: Warning: MacPorts running without privileges. You may be unable to complete certain actions (e.g. install). ---> Computing dependencies for postgresql-server-devel ---> Dependencies to be installed: postgresql-devel ---> Building postgresql-devel Error: Target org.macports.build returned: shell command failed Error: The following dependencies failed to build: postgresql-devel Error: Status 1 encountered during processing. To report a bug, see <http://guide.macports.org/#project.tickets> So I guess that means I need to running MacPorts with privileges and try again. Unfortunately I've no idea how to give MacPorts privileges. I'm running OS X 10.6.3

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  • Garbage collecting at ColdFusion CFC

    - by Sergii
    Hello. I have a CFC as singletone object in Application scope. One of the methods is used for massive data processing and periodically causes the "Java heap space" errors. EDIT All variables inside the method are VAR-scoped, so they should not be kept in the object scope when invokation ended. It can be a bit dumb question for Java people, but I'd like to know how Java garbage collector cleans up the CFC methods memory: only when whole request ends, or maybe right after each method/function invokation? Second option is interesting because it can allow me to split my large method into the few, as one of the possible optimizations.

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  • SVN Mac oSX issue - permissions?

    - by Steve Griff
    Hello there, /Volumes/sites is a connection to a samba share that hosts some of our sites. We authorise using a username & password that is the same user/pass to log onto the mac. When committing, (or even doing a cleanup) from the Mac Client side using the svn command line tool or SCPlugin, this error occurs: Commit succeeded, but other errors follow: Error bumping revisions post-commit (details follow): In directory '/Volumes/sites/foobar/public_html' Error processing command 'committed' in '/Volumes/sites/foobar/public_html' Error replacing text-base of 'index.php' Can't move '/Volumes/sites/foobar/public_html/.svn/tmp/text-base/index.php.svn-base' to '/Volumes/sites/foobar/public_html/.svn/text-base/index.php.svn-base': Operation not permitted Any ideas? I think it's to do with permissions on the mac side not being able to move files around on the samba share. Apologies if my question is kinda vague so any extra information I can give please shout. Regards Steve

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  • Help using Horner's rule and Hash Functions in JAVA?

    - by Matt
    I am trying to use Horner's rule to convert words to integers. I understand how it works and how if the word is long, it may cause an overflow. My ultimate goal is to use the converted integer in a hash function h(x)=x mod tableSize. My book suggests, because of the overflow, you could "apply the mod operator after computing each parenthesized expression in Horner's rule." I don't exactly understand what they mean by this. Say the expression looks like this: ((14*32+15)*32+20)*32+5 Do I take the mod tableSize after each parenthesized expression and add them together? What would it look like with this hash function and this example of Horner's rule?

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  • Which one should I choose AMQP or XMPP for real-time browser-based game?

    - by Devyn
    Hi, I'm choosing between AMQP (RabbitMQ) vs XMPP (eJabberd) for my browser-based flash-free javascript powered real-time turn-based game. I don't know much about AMQP and XMPP protocol. I would like to use PHP for user-authorization and some data store-retrieve with MySQL. As far as I found out, RabbitMQ has PHP clients but eJabberd not. What I understood is javascript client calls PHP script and manipulate necessary processing and then pass to AMQP or XMPP server to pass the data to opponent player. There is a good book 'Pro XMPP Programming with JS and jQuery' from Wrox but there is no example with PHP. So following are my questions. 1) Which protocol is suit for my game? 2) Shall I choose RabbitMQ just for it's PHP client support?

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  • mysql query performance help

    - by Stefano
    Hi I have a quite large table storing words contained in email messages mysql> explain t_message_words; +----------------+---------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------+---------+------+-----+---------+----------------+ | mwr_key | int(11) | NO | PRI | NULL | auto_increment | | mwr_message_id | int(11) | NO | MUL | NULL | | | mwr_word_id | int(11) | NO | MUL | NULL | | | mwr_count | int(11) | NO | | 0 | | +----------------+---------+------+-----+---------+----------------+ table contains about 100M rows mwr_message_id is a FK to messages table mwr_word_id is a FK to words table mwr_count is the number of occurrencies of word mwr_word_id in message mwr_message_id To calculate most used words, I use the following query SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id ORDER BY word_count DESC LIMIT 100; that runs almost forever (more than half an hour on the test server) mysql> show processlist; +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- | Id | User | Host | db | Command | Time | State | Info +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- processlist | 41 | root | localhost:3148 | tst_db | Query | 1955 | Copying to tmp table | SELECT SUM(mwr_count) AS word_count, mwr_word_id FROM t_message_words GROUP BY mwr_word_id | +----+------+----------------+--------+---------+------+----------------------+----------------------------------------------------- 3 rows in set (0.00 sec) Is there anything I can do to "speed up" the query (apart from adding more ram, more cpu, faster disks)? thank you in advance stefano

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  • Pattern Matching in Scheme

    - by kunjaan
    How do I accept the following input? (list of 0 or more charcters and ends with 3) or (list of 1 or more characters 4 and 0 or more characters after 4) something like (match ( list 3)) -> #t (match ( list 1 2 3)) -> #t (match (list 1 2 3 4)) -> #t (match (list 1 2 3 4 5)) -> #t (match (list 4)) -> #f EDIT: THIS IS NOT MY HOMEWORK. I trying to write something like ELIZA from PAIP but I know only how to write a pattern that begins with a word.

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  • Object tree navigation language in Java

    - by lewap
    In the system which I'm currently developing I often have to navigate an object tree and based on its state and values take actions. In normal Java this results in tedious for loops, if statements etc... Are there alternative ways to achieve tree navigation, similar to XPath for XML? I know there is JXPath and OGNL, but do you know any other libraries for such purpose? Do you know any libraries which generate bytecodes for specific tree navigation expressions to make the processing as fast as Java native fors and ifs?

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  • What are the pros and cons of using an in memory DB rather than a ThreadLocal

    - by Pangea
    We have been using ThreadLocal so far to carry some data so as to not clutter the API. However below are some of issues of using thread local that which I don't like: 1) Over the years the data items being carried in thread local has increased 2) Since we started using threads (for some light weight processing), we have also migrating these data to the threads in the pool and copying them back again I am thinking of using an in memory DB for these (we doesn't want to add this to the API). I wondering if this approach is good. What are the pros and cons? thx in advance.

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  • iPhone - Get a pointer to the data behind CGDataProvider?

    - by jtrim
    I'm trying to take a CGImage and copy its data into a buffer for later processing. The code below is what I have so far, but there's one thing I don't like about it - it's copying the image data twice. Once for CGDataProviderCopyData() and once for the :getBytes:length call on imgData. I haven't been able to find a way to copy the image data directly into my buffer and cut out the CGDataProviderCopyData() step, but there has to be a way...any pointers? (...pun ftw) NSData *imgData = (NSData *)(CGDataProviderCopyData(CGImageGetDataProvider(myCGImageRef))); CGImageRelease(myCGImageRef); // i've got a previously-defined pointer to an available buffer called "mybuff" [imgData getBytes:mybuff length:[imgData length]];

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  • How to capture actions taken on Windows Media Player

    - by bluenile
    Hi, I want to programmtically detect the state of movie currently being played in Windows Media Player. i..e if the movie is maximized I need to find that it is maximized and put the word "MAXIMIZED" in text file, if the movie is paused I need to capture PAUSED in text file, if movie is stopped I need to capture STOPPED in text file. The capturing needs to happen in the background i.e. totally transparent to end user as the user takes action while watching the movie on Windows Media player I am planning to achieve this using Visual Basic 6.0 Kindly provide me inputs / pointers on how to go about this. Thanks

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  • Calling and leaving gnuplot prompt and png export

    - by ldigas
    a) I have a data file with, well ... data, and a .gnu file with gnuplot commands. If I call gnuplot like this: gnuplot -p commands_file.gnu I'll get the graph on screen and when I close it, gnuplot will be in it's own prompt (gnuplot_). How can I make it just show the graph, and put me back on cmd prompt after I close it ? b) How to "export" that graph to png or something insertable in Word ? I know there are a dozen tutorials for this on the 'net, but I'm having trouble just finding a simple example.

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  • Allow native DLL to output stdout / stderr in c# console application

    - by xaw
    I have a native DLL which outputs via stdout / stderr. I have a C# console application which calls this DLL and outputs binary data to a parent C# application which started the C# console exe, processing stdout / stderr. Currently when I call the C# exe it works just fine (the DLL hooks up to the stdout of my console application and puts its data in just fine). Is this by design (and shouldn't be broken in future .NET framework versions)? Are there limitations on my managed code's deployment with this strategy (full-trust, permission requirements, GAC issues, etc)? I can't seem to find any documentation about stdout with a managed exe and an unmanaged dll both putting data in that standard output on MSDN. Thanks,

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  • In javascript, how do I find out the name of a function from within that function?

    - by roryhewitt
    The title should make it clear. Is it possible from within a function to determine the name of that function? Basically, I'm adding some debugging code to a number of functions, and I'd like to be able to simply add the following line inside every function: if (global_debugOn) alert("Processing function " + function-name); How can I get 'function-name'? Yes, obviously I could simply type in the function name (after all I'm typing in the whole alert bit), but that's a hassle to do, especially if there is a nice simple way of retrieving it dynamically. Plus, as function names change during development, I'd like to keep it up-to-date... I hoped that maybe the arguments attribute might hold this (e.g. arguments[0], like in C), but I couldn't get it to work. I'm not even sure if arguments works anyway. Thanks! Rory

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  • Windows Azure worker roles: One big job or many small jobs?

    - by Ryan Elkins
    Is there any inherent advantage when using multiple workers to process pieces of procedural code versus processing the entire load? In other words, if my workflow looks like this: Get work from queue0 and do A Store result from A in queue1 Get result from queue 1 and do B Store result from B in queue2 Get result from queue2 and do C Is there an inherent advantage to using 3 workers who each do the entire process themselves versus 3 workers that each do a part of the work (Worker 1 does 1 & 2, worker 2 does 3 & 4, worker 3 does 5). If we only care about working being done (finished with step 5) it would seem that it scales the same way (once you're using at least 3 workers). Maybe the big job is better because workers with that setup have less bottleneck issues?

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  • Trying to recognize _NSFaultingMutableSet as member of NSSet

    - by Will
    I'm trying to recognize the result of a generic query to a managed object as an NSSet. Currently the class returned is a member of _NSFaultingMutableSet, which is clearly related, but fails the isMemberOf:[NSSet class] and isKindOf:[NSSet class] calls. Given that Cocoa doesn't do a direct implementation of NSSet, it's not surprising that I've got some air in the pipes, but I'm wondering if I'm messing something obvious up or this requires a higher grade of kung-fu than I possess. Code follows: SEL selector = NSSelectorFromString(someString); if(![self respondsToSelector:selector]){ NSLog(@"Error processing item"); return; } id items = [self performSelector:selector]; Class itemsClass = [items class]; if ( [itemsClass isKindOfClass:[NSSet class]]) { // do something }

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  • Performance logging tips

    - by Germstorm
    I am developing large data collecting ASP.Net/Windows service application-pair that uses Microsoft SQL Server 2005 through LINQ2Sql. Performance is always the issue. Currently the application is divided into multiple larger processing parts, each logging the duration of their work. This is not detailed and does not help us with anything. It would be nice to have some database tables that contain statistics that the application itself collected from its own behavior. What logging tips and data structures do you recommend to spot the parts that cause performance problems?

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  • Reverse rendering of Urdu fonts

    - by Syed Muhammad Umair
    I am working on a project that is based on Urdu language in Ubuntu platform. I'm using Python language and have almost achieved my task. The problem is that, the Urdu text is rendered in reverse order. For example, consider the word ??? (which means work) consisting of the three letters: ? , ? , and ? The output is rendered in reverse order as ??? consisting of the three letters: ?, ?, and ? When copying this text to Open Office or opening the generated XML file in Firefox, the generated result is absolutely desired. I Am using Python 2.6 IDLE, its working perfect with Windows platform, which clearly shows its not the problem of IDLE. Am working on TKINTER GUI library. How can this problem be solved?

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  • How to sift idioms and set phrases apart from other common phrases using NLP techniques?

    - by hippietrail
    What techniques exist that can tell the difference betwen plain common phrases such as "to the", "and the" and set phrases and idioms which have their own lexical meanings such as "pick up", "fall in love", "red herring", "dead end"? Are there techniques which are successful even without a dictionary, statistical methods HMMs train on large corpora for instance? Or are there heuristics such as ignoring or weighting down "promiscuous" words which can co-occur with just about any word versus words which occur either alone or in a specific limited set of idiomatic phrases? If there are such heuristics, how do we take into account set phrases and verbal phrases which do incorporate promiscuous words such as "up" in "beat up", "eat up", "sit up", "think up"? UPDATE I've found an interesting paper online: Unsupervised Type and Token Identi?cation of Idiomatic Expressions

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  • Can't print elements in a DIV tag

    - by Mckenzi
    I am using a Drag-able and re-sizeable DIV's in this HTML file. Where the user will place the DIV tag to his desired place in a main parent DIV tag. Now I want to print this main DIV tag, but the problem is that the code which I'm using to PRINT this main DIV is printing in a sequence, like not the way user has arranged the DIV's. Also it doesn't take up the main DIV background IMAGE. here is the code. JAVASCRIPT & CSS <link rel="stylesheet" type="text/css" href="byrei-dyndiv_0.5.css"> <script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.1.min.js" > </script> <script type="text/javascript" src="byrei-dyndiv_1.0rc1.js"></script> <script language="javascript" type="text/javascript"> function change(boxid,divtoaffect) { content = document.getElementById("" + boxid + "").value.replace(/\n/g, '<br>'); document.getElementById(divtoaffect).innerHTML = content; } function select1() { test=document.getElementById("changeMe"); test.style.backgroundImage="url('Sunset.jpg')"; } function select2() { test=document.getElementById("changeMe"); test.style.backgroundImage="url('Blue hills.jpg')"; } function PrintElem(elem) { Popup($(elem).text()); } function Popup(data) { var mywindow = window.open('', 'my div', 'height=400,width=600'); mywindow.document.write('<html><head><title>my div</title>'); /*optional stylesheet*/ //mywindow.document.write('<link rel="stylesheet" href="main.css" type="text/css" />'); mywindow.document.write('</head><body >'); mywindow.document.write(data); mywindow.document.write('</body></html>'); mywindow.document.close(); mywindow.print(); return true; } // Print DIV function printContent(id){ str=document.getElementById(id).innerHTML newwin=window.open('','printwin','left=100,top=100,width=400,height=400') newwin.document.write('<HTML>\n<HEAD>\n') newwin.document.write('<TITLE>Print Page</TITLE>\n') newwin.document.write('<script>\n') newwin.document.write('function chkstate(){\n') newwin.document.write('if(document.readyState=="complete"){\n') newwin.document.write('window.close()\n') newwin.document.write('}\n') newwin.document.write('else{\n') newwin.document.write('setTimeout("chkstate()",2000)\n') newwin.document.write('}\n') newwin.document.write('}\n') newwin.document.write('function print_win(){\n') newwin.document.write('window.print();\n') newwin.document.write('chkstate();\n') newwin.document.write('}\n') newwin.document.write('<\/script>\n') newwin.document.write('</HEAD>\n') newwin.document.write('<BODY onload="print_win()">\n') newwin.document.write(str) newwin.document.write('</BODY>\n') newwin.document.write('</HTML>\n') newwin.document.close() } </script> </head> <body> <style type="text/css"> #output1,#output2 ,#output3 { width: 300px; word-wrap: break-word; border: solid 1px black; } </style> HTML <div style="width:650px;height:300px;" id="changeMe" > <table cellpadding="5" cellspacing="0" width="100%" style="margin:auto;"> <tr> <td><div class="dynDiv_moveDiv" id="output1" style="font-weight:bold;height:20px;margin-top:40px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div> </td> </tr> <tr> <td><div class="dynDiv_moveDiv" id="output2" style="height:40px;margin-top:30px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div></td> </tr> <tr> <td><div class="dynDiv_moveDiv" id="output3" style="height:50px;margin-top:40px;"> <div class="dynDiv_resizeDiv_tl"></div> <div class="dynDiv_resizeDiv_tr"></div> <div class="dynDiv_resizeDiv_bl"></div> <div class="dynDiv_resizeDiv_br"></div> </div></td> </tr> </table> </div> <tr> <td align="center"><input type="button" value="Print Div" onClick="printContent('changeMe')" /> </td> </tr>

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  • Drupal setup for proofreaders - "Revision Moderation"

    - by Olav
    I would like to have external proofreaders to work directly inside my Drupal site. Basically they should be able to create new revisions, annotate, comment etc without affecting what users see without my approval. Particularly the node might already be public. "Revision Moderation" module sounds a bit like what I want, but it seems not to be so much used, and I run into other modules like "Workflow". What is important for me: Possibility to work on content already published Easy for the proofreader, easy for me to direct her to the right location Other useful features such as comments (Like those balloons in Word), diffs etc (I guess I could work around (1) by copying the content)

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