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  • IAR MSP430 compiler internal error while compiling

    - by michael
    IAR C/C++ Compiler for MSP430 5.10.1 [Evaluation] (5.10.1.20144) I get an illegal state internal error when attempting to compile the FreeRTOS 5.4 Task.c file (everything else compiles fine) Internal Error: [CoreUtil/General]: Illegal state The kick start version of IAR (MSP430 version) works fine. Any thoughts?

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  • Problems with native Win32api RichEdit control and its IRichEditOle interface

    - by Michael
    Hi All! As part of writing custom command (dll with class that implements Interwoven command interface) for one of Interwoven Worksite dialog boxes,I need to extract information from RichEdit textbox. The only connection to the existing dialog box is its HWND handle; Seemingly trivial task , but I got stuck : Using standard win32 api functions (like GetDlgItemText) returns empty string. After using Spy++ I noticed that the dialog box gets IRichEditOle interface and seems to encapsulate the string into OLE object. Here is what I tried to do: IRichEditOle richEditOleObj = null; IntPtr ppv = IntPtr.Zero; Guid guid = new Guid("00020D00-0000-0000-c000-000000000046"); Marshal.QueryInterface(pRichEdit, ref guid, out ppv); richEditOleObj = (IRichEditOle)Marshal.GetTypedObjectForIUnknown(ppv,typeof(IRichEditOle)); judging by GetObjectCount() method of the interface there is exactly one object in the textbox - most likely the string I need to extract. I used GetObject() method and got IOleObject interface via QueryInterface : if (richEditOleObj.GetObject(0, reObject, GetObjectOptions.REO_GETOBJ_ALL_INTERFACES) == 0) //S_OK { IntPtr oleObjPpv = IntPtr.Zero; try { IOleObject oleObject = null; Guid objGuid = new Guid("00000112-0000-0000-C000-000000000046"); Marshal.QueryInterface(reObject.poleobj, ref objGuid, out oleObjPpv); oleObject = (IOleObject)Marshal.GetTypedObjectForIUnknown(oleObjPpv, typeof(IOleObject)); To negate other possibilites I tried to QueryInteface IRichEditOle to ITextDocument but this also returned empty string; tried to send EM_STREAMOUT message and read buffer returned from callback - returned empty buffer. And on this point I got stuck. Googling didn't help much - couldn't find anything that was relevant to my issue - it seems that vast majority of examples on the net about IRichEditOle and RichEdit revolve around inserting bitmap into RichEdit control... Now since I know only basic stuff about COM and OLE , I guess I am missing something important here. I would appreciate any thoughts suggestions or remarks.

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  • Passing parameters to a flash movie inserted in a VB program

    - by Michael
    Hi! I need to insert a Flash movie in a Visual Basic 2008 express form and send parameters to the movie, but am a newbie to VB. The flash movie will plot points sent by VB in a graph. I tried to insert the Shockwave Flash control in the form but cannot find it anywhere. So I inserted the webbrowser control, which I understand can be used to a similar purpose. But how would I send the values of X and Y (coordinates to plot in Flash) to the flash swf? Thanks for any help!

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  • Iterating with CakePhp

    - by Michael
    Hi all, What do you all recommend for iterative development in cakePhp? Create a separate project and port it over once a week? Basically, what's the best way to keep a live site from a working site, and the best way to merge them automatically? Thanks!

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  • How can I use a TreeWalker to dump out the DOM

    - by michael
    Hi, In w3c dom interface, there is DOMTreeWalker to traverse the DOM. I find this example which uses DOMTreeWalker: http://www.java-tips.org/java-se-tips/org.w3c.dom/how-to-traverse-the-dom-tree-using-treewalker-2.html But my question is How can I use the DOMTreeWalk to dump the dom structure and value to a file? i.e. I need to know when a parent start and a parent end so that I can do when I dump the dom to a file (i need to insert after each parent dumps its children: <parent> <child a1="1" a2="2"/> <child a3="1" a4="3"/> <child a5="1" a6="5"/> </parent>

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  • How to scale a sprite image without losing color key information?

    - by Michael P
    Hello everyone, I'm currently developing a simple application that displays map and draws some markers on it. I'm developing for Windows Mobile, so I decided to use DirectDraw and Imaging interfaces to make the application fast and pretty. The map moves when user moves finger on the touchscreen, so the whole map moving/scrolling animation has to be fast, but it is not. On every map update I have to draw portion of the map, control buttons, and markers - buttons and markers are preloaded on DirectDraw surface as a mipmap. So the only thing I do is BitBlit from the mipmap to a back buffer, and from the back buffer to a primary surface (I can't use page flipping due to the windowed mode of my application). Previously I used premultiplied-alpha surface with 32 bit ARGB pixel format for images mipmap, everything was looking good, but drawing entire "scene" was horribly slow - i could forget about smooth map scrolling. Now I'm using mipmap with native (RGB565) pixel format and fuchsia (0xFF00FF) color key. Drawing is much better my mipmap surface is generated on program loading - images are loaded from files, scaled (with filtering) and drawn on mipmap. The problem is, that image scaling process blends pixel colors, and those pixels which are on the border of a sprite region are blended with surrounding fuchsia pixels resulting semi-fuchsia color that is not treated as color key. When I do blitting with color key option, sprites have small fuchsia-like borders, and it looks really bad. How to solve this problem? I can use alpha blitting, but it is too slow - even in ARGB 1555 format.

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  • Memory allocation in Xvfb

    - by michael
    Hi, I have following this blog in setting Xvfb in my ubuntu environment: http://corpocrat.com/2008/08/19/how-to-install-xvfb-x11-server-in-linux-server/ So I did this: Xvfb :1 -screen 0 800x600x24& My question is does Xvfb only allocate memory during initialization? i.e. just enough for a display of 800x600x24? So as I have more and more programs (different programs or same program multiple times) display to the Xvfb , it does not allocate more memory? Thank you.

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  • Can I include a NSUserDefault password test in AppDelegate to load a loginView?

    - by Michael Robinson
    I have a name and password in NSUserDefaults for login. I want to place a test in my AppDelegate.m class to test for presence and load a login/signup loginView.xib modally if there is no password or name stored in the app. Here is the pulling of the defaults: -(void)refreshFields { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; usernameLabel.text = [defaults objectForKey:kUsernameKey]; passwordLabel.text = [defaults objectForKey:kPasswordKey]; Here is the tabcontroller loading part: - (void)applicationDidFinishLaunching:(UIApplication *)application { firstTab = [[FirstTab alloc] initWithStyle:UITableViewStylePlain]; UINavigationController *firstNavigationController = [[UINavigationController alloc] initWithRootViewController:firstTab]; [firstTab release]; secondTab = // EDITED FOR SPACE thirdTab = // EDITED FOR SPACE tabBarController = [[UITabBarController alloc] init]; tabBarController.viewControllers = [NSArray arrayWithObjects:firstNavigationController, secondNavigationController, thirdNavigationController, nil]; [window addSubview:tabBarController.view]; [firstNavigationController release]; [secondNavigationController release]; [thirdNavigationController release]; [self logout]; [window makeKeyAndVisible]; Here is where the loginView.xib loads automatically: - (void)logout { loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil]; UINavigationController *loginNavigationController = [[UINavigationController alloc] initWithRootViewController:loginViewController]; [loginViewController release]; [tabBarController presentModalViewController:loginNavigationController animated:YES]; [loginNavigationController release]; } I want to replace the above autoload with a test similar to below (that works) using IF-ELSE - (void)logout { if ([usernameLabel.text length] == 0 || [passwordLabel.text length] == 0) { loginViewController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil]; UINavigationController *loginNavigationController = [[UINavigationController alloc] initWithRootViewController:loginViewController]; [loginViewController release]; [tabBarController presentModalViewController:loginNavigationController animated:YES]; [loginNavigationController release]; }else { [window addSubview:tabBarController.view];} Thanks in advance, I'm totally lost on this.

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  • AsyncTask and Contexts

    - by Michael
    So I'm working out my first multi-threaded application using Android with the AsyncTask class. I'm trying to use it to fire off a Geocoder in a second thread, then update the UI with onPostExecute, but I keep running into an issue with the proper Context. I kind of hobbled my way through using Contexts on the main thread, but I'm not exactly sure what the Context is or how to use it on background threads, and I haven't found any good examples on it. Any help? Here is an excerpt of what I'm trying to do: public class GeoCode extends AsyncTask<GeoThread, Void, GeoThread> { @Override protected GeoThread doInBackground(GeoThread... i) { List<Address> addresses = null; Geocoder geoCode = null; geoCode = new Geocoder(null); //Expects at minimum Geocoder(Context context); addresses = geoCode.getFromLocation(GoldenHour.lat, GoldenHour.lng, 1); } } It keeps failing at the sixth line there, because of the improper Context.

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  • How do I convert a TimeSpan to a formatted string?

    - by Michael Wheeler
    Exact Duplicate Timespan formatting First question here: I have two DateTime vars, beginTime and endTime. I have gotten the difference of them by doing the following: TimeSpan dateDifference = endTime.Subtract(beginTime); How can I now return a string of this in hh hrs, mm mins, ss secs format using C#. If the difference was 00:06:32.4458750 It should return this 00 hrs, 06 mins, 32 secs Thanks for the help

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  • Read-only view of a Java list with more general type parameter

    - by Michael Rusch
    Suppose I have class Foo extends Superclass. I understand why I can't do this: List<Foo> fooList = getFooList(); List<Superclass> supList = fooList; But, it would seem reasonable for me to do that if supList were somehow "read-only". Then, everything would be consistent as everything that would come out of an objList would be a Foo, which is a Superclass. I could probably write a List implementation that would take an underlying list and a more general type parameter, and would then return everything as the more general type instead of the specific type. It would work like the return of Collections.unmodifiableList() except that the type would be made more general. Is there an easier way? The reason I'm considering doing this is that I am implementing an interface that requires that I return an (unmodifiable) List<Superclass>, but internally I need to use Foos, so I have a List<Foo>. I can't just cast.

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  • NHibernate handling mutliple resultsets from a sp call

    - by Michael Baldry
    I'm using a stored procedure to handle search on my site, it includes full text searching, relevance and paging. I also wanted it to return the total number of results that would have been returned, had paging not being there. So I've now got my SP returning 2 select statements, the search and just SELECT @totalResults. Is there any way I can get NHibernate to handle this? I'm currently accessing the ISession's connection, creating a command and executing the SP myself, and mapping the results. This isn't ideal, so I'm hoping I can get NH to handle this for me. Or if anyone has any other better ways of creating complicated searches etc with NH, I'd really like to hear it.

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  • Eclipse PDE - Plug-in, Feature, and Product Versioning

    - by Michael
    I am having much confusion over the process of upgrading version numbers in dependent plug-ins, features, and products in a fairly large eclipse workspace. I have made API changes to java code residing in an existing plug-in and thus requires an increase of the Major part of the version identifier. This plug-in serves as a dependency to a given feature, where the feature is later included in a product. From the documentation at http://wiki.eclipse.org/Version_Numbering, I understand (for the most part) when the proper number should be increased on the containing plug-in itself. However, how would this Major version number change on the plug-in affect dependent, "down-the-line" items (e.g., features, products)? For example, assume we have the typical "Hello World" setup as follows: Plug-in: com.example.helloworld, version 1.0.0 Feature: com.example.helloworld.feature, version 1.0.0 Product: com.example.helloworld.product, version 1.0.0 If I were to make an API change in the plug-in, this would require a version update to be that of 2.0.0. What would then be the version of the feature, 1.1.0? The same question can be applied for the product level as well (e.g., if the feature is 1.1.0 OR 2.0.0, what is the product version number)? I'm sure this is quite the newbie question so I apologize for wasting anyone's time and effort. I have searched for this type of content but all I am finding is are examples showing how to develop a plug-in, feature, product, and update site for the first time. The only other content related to my search has been developing feature patches and have not touched on the versioning aspect as much as I would prefer. I am having difficulty coming into (for the first time) an Eclipse RCP / PDE environment and need to learn the proper way and / or best practices for making such versioning updates and how to best reflect this throughout other dependent projects in the workspace.

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  • Problems with show hid jquery

    - by Michael
    I am someone can help... This should be easy but I am lost. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Show Hide Sample</title> <script src="js/jquery.js" type="text/javascript"></script> <script type="text/javascript"> $(document).ready(function(){ $('#content1').hide(); $('a').click(function(){ $('#content1').show('slow'); }); $('a#close').click(function(){ $('#content1').hide('slow'); }) }); </script> <style> body{font-size:12px; font-family:"Trebuchet MS"; background: #CCF} #content1{ border:1px solid #DDDDDD; padding:10px; margin-top:5px; width:300px; } </style> </head> <body> <a href="#" id="click">Test 1</a> <div class="box"> <div id="content1"> <h1 align="center">Hide 1</h1> <P> Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Nullam pulvinar, enim ac hendrerit mattis, lorem mauris vestibulum tellus, nec porttitor diam nunc tempor dui. Aenean orci. Sed tempor diam eget tortor. Maecenas quis lorem. Nullam semper. Fusce adipiscing tellus non enim volutpat malesuada. Cras urna. Vivamus massa metus, tempus et, fermentum et, aliquet accumsan, lectus. Maecenas iaculis elit eget ipsum cursus lacinia. Mauris pulvinar.</p> <p><a href="#" id="close">Close</a></p> </div> </div> <a href="#" id="click">Test 2</a> <div class="box"> <div id="content1"> <h1 align="center">Hide 2</h1> <p> Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Nullam pulvinar, enim ac hendrerit mattis, lorem mauris vestibulum tellus, nec porttitor diam nunc tempor dui. Aenean orci. Sed tempor diam eget tortor. Maecenas quis lorem. Nullam semper. Fusce adipiscing tellus non enim volutpat malesuada. Cras urna. Vivamus massa metus, tempus et, fermentum et, aliquet accumsan, lectus. Maecenas iaculis elit eget ipsum cursus lacinia. Mauris pulvinar.</p> <p><a href="#" id="close">Close</a></p> </div> </div> </body> </html>

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  • Memcached and Rails Fragment Caching Issue

    - by Michael Waxman
    When I have 2 views that fragment cache the same query BUT display them differently, there is only one fragment and they both display it the same way. Is there any way around this? For example... #views/posts/list - cache(@posts) do - for p in @posts = p.title #views/posts/list_with_images - cache(@posts) do - for p in @posts = p.title = p.content = image_tag(p.image_url) #controllers/posts_controller def list ... @posts = Post.all end def list_with_images ... @posts = Post.all end

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  • Technologies used in Remote Administration applications(not RD)

    - by Michael
    I want to know what kind of technologies are used nowadays as underlying screen capture engine for remote administration software like VNC pcAnywhere TeamViewer RAC Remote Administrator etc.. The programming language is not so important as just to know whether a driver needs to be developed which is polling video memory 30 times per second or there are any com objects built in the Windows kernel to help doing this? I'm not interested in 3rd party components for doing this. Do I have to use DirectX facilities? Just want some start point to develop my own screen stream capture engine, which will be less CPU hog.

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  • C# WCF/WebService: Interoperable exception handling.

    - by michael paul
    I understand that WCF will convert an exception into a fault and send it back as a SOAP message, but I was wondering if this is truly interoperable. I guess I'm having a tough time trying to figure out this possible scenario: Client (Java) calls a WCF Service (LoginService). Server checks for proper authorization, user authorization fails. Server throws an UnauthorizedAccessException. WCF converts this into a Fault somehow. (* - See Below As Well) Client has to be able to know how to read this Fault. I guess I'm just having a tough time understanding how this could still be interoperable because it is expecting Java to know how to translate a SOAP Fault that .NET encodes from an UnauthorizedAccessException. Also, how does .NET actually convert the exception to a fault, what goes in as the fault code, name, etc. Some of the things seem to be "duh"s like perhaps the Fault Name is "UnauthorizedAccessException", but I'd rather know for sure than guess.

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  • help fixing pagination class

    - by michael
    here is my pagination class. the data in the construct is just an another class that does db queries and other stuff. the problem that i am having is that i cant seem to get the data output to match the pagination printing and i cant seem to get the mysql_fetch_assoc() to query the data and print it out. i get this error: Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /phpdev/pagination/index.php on line 215 i know that can mean that the query isnt correct for it to fetch the data but i have entered it correctly. sorry for the script being a little long. i thank all in advance for any help. <?php include_once("class.db.php"); mysql_connect("host","login","password"); mysql_select_db("iadcart"); class Pagination { var $adjacents; var $limit; var $param; var $mPage; var $query; var $qData; var $printData; protected $db; function __construct() { $this->db = new MysqlDB; } function show() { $result = $this->db->query($this->query); $totalPages = $this->db->num_rows($result); $limit = $this->limit; /* ------------------------------------- Set Page ------------------------------------- */ if(isset($_GET['page'])) { $page = intval($_GET['page']); $start = ($page - 1) * $limit; } else { $start = 0; } /* ------------------------------------- Set Page Vars ------------------------------------- */ if($page == 0) { $page = 1; } $prev = $page - 1; $next = $page + 1; $lastPage = ceil($totalPages/$limit); $lpm1 = $lastPage - 1; $adjacents = $this->adjacents; $mPage = $this->mPage; //the magic $this->qData = $this->query . " LIMIT $start, $limit"; $this->printData = $this->db->query($this->qData); /* ------------------------------------- Draw Pagination Object ------------------------------------- */ $pagination = ""; if($lastPage > 1) { $pagination .= "<div class='pagination'>"; } /* ------------------------------------- Previous Link ------------------------------------- */ if($page > 1) { $pagination .= "<li><a href='$mPage?page=$prev'> previous </a></li>"; } else { $pagination .= "<li class='previous-off'> previous </li>"; } /* ------------------------------------- Page Numbers (not enough pages - just display active page) ------------------------------------- */ if($lastPage < 7 + ($adjacents * 2)) { for($counter = 1; $counter <= $lastPage; $counter++) { if($counter == $page) { $pagination .= "<li class='active'>$counter</li>"; } else { $pagination .= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; } } } /* ------------------------------------- Page Numbers (enough pages to paginate) ------------------------------------- */ elseif($lastPage > 5 + ($adjacents * 2)) { //close to beginning; only hide later pages if($page < 1 + ($adjacents * 2)) { for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++) { if ($counter == $page) { $pagination.= "<li class='active'>$counter</li>"; } else { $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; } } $pagination.= "..."; $pagination.= "<li><a href='$mPage?page=$lpm1'>$lpm1</a></li>"; $pagination.= "<li><a href='$mPage?page=$lastPage'>$lastPage</a></li>"; } elseif($lastPage - ($adjacents * 2) > $page && $page > ($adjacents * 2)) { $pagination.= "<li><a href='$mPage?page=1'>1</a></li>"; $pagination.= "<li><a href='$mPage?page=2'>2</a></li>"; $pagination.= "..."; for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++) { if ($counter == $page) { $pagination.= "<li class='active'>$counter</li>"; } else { $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; } } $pagination.= "..."; $pagination.= "<li><a href='$mPage?page=$lpm1'>$lpm1</a></li>"; $pagination.= "<li><a href='$mPage?page=$lastPage'>$lastPage</a></li>"; } else { $pagination.= "<li><a href='$mPage?page=1'>1</a></li>"; $pagination.= "</li><a href='$mPage?page=2'>2</a></li>"; $pagination.= "..."; for ($counter = $lastPage - (2 + ($adjacents * 2)); $counter <= $lastPage; $counter++) { if ($counter == $page) { $pagination.= "<li class='active'>$counter</li>"; } else { $pagination.= "<li><a href='$mPage?page=$counter'>$counter</a></li>"; } } } } /* ------------------------------------- Next Link ------------------------------------- */ if ($page < $counter - 1) { $pagination.= "<li><a href='$mPage?page=$next'> Next </a></li>"; } else { $pagination.= "<li class='next-off'> Next </li>"; $pagination.= "</div>"; } print $pagination; } } ?> <html> <head> </head> <body> <table style="width:800px;"> <?php mysql_connect("localhost","root","games818"); mysql_select_db("iadcart"); $pagination = new pagination; $pagination->adjacents = 3; $pagination->limit = 10; $pagination->param = $_GET['page']; $pagination->mPage = "index.php"; $pagination->query = "select * from tbl_products where pVisible = 'yes'"; while($row = mysql_fetch_assoc($pagination->printData)) { print $row['pName']; } ?> </table> <br/><br/> <?php $pagination->show(); ?> </body> </html>

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  • automated email downloading and treading similar messages

    - by Michael
    Okay here it is : I have built an c# console app that downloads email, save attachments , and stores the subject, from, to, body to a MS SQL Database. I use aspNetPOP3 Component to do this. I have build a front end ASP.NET application to search and view the messages. Works great. Next Steps (this is where I need help ): Now I want my users (of the asp.net app) to reply to this message send the email to the originator, and tread any additional replies back and forth on from that original message(like basecamp). This would allow my end user not to have to log-in to a system, they just continue using email (our users can as well). The question is what should I use to determine if messages are related? Subject line I think is a bad approach. I believe the best method i've seen so far is way basecamp does it, but I'm not sure how that is done, here is a real example of the reply to address from a basecamp email (I've changed the host name): [email protected] Basecamp obviously are prefixing the pre-pending a tracking id to the email address, however , when I try this with my mail service, it's rejected. Is this the best approach, is there a way I can accomplish this, is there a better approach, or even a better email component tool? Thanks, Mike

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  • How to transfer objects through the header in WCF

    - by Michael
    I'm trying to transfer some user information in the header of the message through message inspectors. I have created a behavior which adds the inspector to the service (both client and server). But when I try to communicate with the service I get the following error: XmlException: Name cannot begin with the '<' character, hexadecimal value 0x3C. I have also get exception telling me that DataContracts where unexpected. Type 'System.DelegateSerializationHolder+DelegateEntry' with data contract name 'DelegateSerializationHolder.DelegateEntry:http://schemas.datacontract.org/2004/07/System' is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer. The thing is that my object contains other objects which are marked as DataContract and I'm not interested adding the KnownType attribute for those types. Another problem might be that my object to serialize is very restricted in form of internal class and internal properties etc. Can anyone guide me in the right direction. What I'm I doing wrong? Some code: public virtual object BeforeSendRequest(ref Message request, IClientChannel channel) { var header = MessageHeader.CreateHeader("<name>", "<namespace>", object); request.Headers.Add(header); return Guid.NewGuid(); }

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  • Most used .NET namespace

    - by Michael Prewecki
    What is your most commonly used namespace in .NET. I know it will vary greatly based upon the types of projects you develop but the stack overflow audience should provide a fairly decent sample set for the types of .NET projects being developed. I'm simply interest in the name of the namespace (one namespace per answer and no one person should have more than one answer, if someone else has the same answer as you then just upvote their answer). Try to be as specific as possible (so answering System, isn't helpful). I'm after this information to help new developers focus their attention on the most common .NET namespaces...there are after all thousands of them! To start off mine is almost certainly System.Collections.Generic, I use lists of things everywhere.

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  • Sync Vs. Async Sockets Performance in .NET

    - by Michael Covelli
    Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially with the new SocketAsyncEventArgs which saves on the allocation). I think this makes sense if we're talking about a server with many client connections where its not possible to allocate one thread per connection. Then I can see the advantage of using the ThreadPool threads and getting async callbacks on them. But in my app, I'm the client and I just need to listen to one server sending market tick data over one tcp connection. Right now, I create a single thread, set the priority to Highest, and call Socket.Receive() with it. My thread blocks on this call and wakes up once new data arrives. If I were to switch this to an async pattern so that I get a callback when there's new data, I see two issues The threadpool threads will have default priority so it seems they will be strictly worse than my own thread which has Highest priority. I'll still have to send everything through a single thread at some point. Say that I get N callbacks at almost the same time on N different threadpool threads notifying me that there's new data. The N byte arrays that they deliver can't be processed on the threadpool threads because there's no guarantee that they represent N unique market data messages because TCP is stream based. I'll have to lock and put the bytes into an array anyway and signal some other thread that can process what's in the array. So I'm not sure what having N threadpool threads is buying me. Am I thinking about this wrong? Is there a reason to use the Async patter in my specific case of one client connected to one server?

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  • perl escaping \n or \t

    - by Michael
    I need to escape \n so on output I really get newline or tab $ perl -p -e 's/e/a/ge' now I want each e to be substituted with \n $ perl -p -e 's/e/\n/ge' but even \n gives me an error. this was a simplified example. In real script(makefile) I have substitute := perl -p -e 's/@([^@]+)@/defined $$ENV{$$1} ? $$ENV{$$1} : $$1/ge' and in target I have such a nice command $(substitute) $< > $@ and if the input file for perl contains \n at output I will see it literally... I want to have real newline.

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