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  • When is Facebook Connect supposed to call its delegate methods?

    - by RickiG
    Hi The Facebook connect code is eluding me a bit. I have no problem doing a login, and a wall post, however, I simply can not figure out how the delegate methods for the FBDialog andFBStreamDialog is supposed to work. - (void)postToWall { FBStreamDialog *dialog = [[[FBStreamDialog alloc] init] autorelease]; dialog.delegate = self; dialog.userMessagePrompt = @"Enter your message:"; dialog.attachment = [NSString stringWithFormat:@"JSONpost code"]; [dialog show]; } I adhere to these protocols in my controller: <FBDialogDelegate, FBSessionDelegate, FBRequestDelegate> I then implement the two methods: - (void) dialogDidCancel:(FBDialog *)dialog { NSLog(@"Failed"); } - (void) dialogDidSucceed:(FBDialog *)dialog { NSLog(@"Success"); } After I tap "publish" and the postToWall methods is done executing the Facebook "pop up" in the UI is empty, except a small "X" in the top right corner and a "F" (facebook logo) in the top left corner. The UI will stay there until I tap the "X", this results in the dialogDidCancel delegate method being called. The post data is showing up on the Facebook page, everything seems to work. Why is thedialogDidSucceedmethod never called? I need this to release my facebook controller and restore the UI back to where the user was before "starting" FB Connect. Thank You:)

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  • Postfix how to triggering my script when outgoing email status is sent?

    - by Laszlo Malina
    I want to run a program when postfix has successfully sent out a mail (local or remote). I would like to pass the headers to program and if possible also the destination ip or address (exclude spam filter delivery). I just have an idea: Delivery Status Notification processing via uniqe transport program, but I'd prefer the above. My goal is to be recorded lifetime (events) of email: it came, it went out (from, to, subject, datetime, message id, message status: bounce, sent). I would only need the state of the outgoing mail, because incoming and bounce program is working. It is possible to trigger a program (similar to a transport pipe/spawn) or DSN "cheat" stay? Thanks in advance for any reply!

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  • jqueryvalidation no space customization

    - by Ken
    i have a form where the user can update his name and last name. i use jquery validation to validate the form. how can i validate if the user put spaces? here's what i have: <script> $(document).ready(function(){ $('#submit').click(function() { var valid = $("#myform").valid(); if(!valid) { return false; } $.ajax({ type: "POST", url: 'save', data: $('#myform').serialize(), dataType: 'json', cache: false, success: function(result) { // redirect to another page } }); }); }); </script> </head> <body> <form id="myform" method="post" action=""> <fieldset> <legend>update name</legend> <p> <label for="fname">Name</label> <em>*</em><input id="fname" name="fname" size="25" class="required" minlength="2" /> </p> <p> <label for="lname">Last Name</label> <em>*</em><input id="lname" name="lname" size="25" class="required" minlength="2" /> </p> <p> <input id="submit" type="submit" value="Submit"/> </p> </fieldset> </form> thanks

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  • nVidia driver is not installed for x64 Windows 7 (Vaio VGN-SZ460N)

    - by Sergey Osypchuk
    I just upgraded memory to 4GB for Sony Vaio VGN-SZ460N laptop and trying to install Windows 7 x64. All works fine with default drivers, except video - I am not able to set resolution more than 1024x768. Technical specification says that this model is using: Chipset : Intel® 945GM Processor : NVIDIA® GeForce® Go 7400 notebook graphics processing unit (GPU) and Intel® Graphics Media Accelerator 950 I was trying to use Intel 945GM driver, for Windows 7 Ultimate x64 and get error: This computer does not meet the mininum requirements for installing the software Also, I was trying to download nVidia GeForce Go 7400 x64 but it says that there is no compatible hardware. Actually, it has disclaimer that those drivers doesn't work for Sony vaio and recomendation to use OEM website. Sony website has only 32-bit version of driver which says that it cannot be installed and x64 should be used... Any ideas?

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  • jquery ui dialog in asp.net mvc3 doesn't open on second time

    - by giri
    when i click the New Trade button in the form it opens jquery ui dialog. but, i have link button in the gridview when i click the link button it should open jquery ui dialog, it opens jquery ui dialog before clicking the new trade button. but, after clicking the new trade button, if i click link button in the gridview it invoke "ViewTradeDialog(id)" function, the dialog doesn't open, it shows error message "$vwdia.html(data).dialog is not a function". my code follows: @using (Html.BeginForm("NewTrade", "Trade", FormMethod.Post, new { id = "searchForm" })) { <div id="searchbtn"> <input id="btn_newtrade" type="submit" value="New Trade" /> </div> } jquery code <script type="text/javascript"> $(function () { var $loading = $('<img src="../../loading.gif" alt="loading">'); var $dialog = $('<div></div>').append($loading); $('#searchForm').submit(function (e) { var url = this.action; $.ajax({ autoOpen: false, url: url, success: function (data) { $dialog.html(data).dialog({ zIndex:1, width: 1400, height: 600, resizable: false, title: 'New Trade Details', modal: true, buttons: { "close": function () { $dialog.dialog('close'); }, "Add Trade": function () { $dialog.dialog('close'); $.ajax({ type: 'POST', url: url }); } } }); } }); return false; }); }); function ViewTradeDialog(id) { alert(id); var $vwdia = $('<div></div>'); var url = '/Trade/ViewTrades?tradeid=' + id; $.ajax({ url: url, success: function (data) { $vwdia.html(data).dialog({ width: 600, height: 600, resizable: false, title: 'View Trade Details', modal: false, buttons: { "close": function () { $vwdia.dialog('close'); } } }); } }); return false; }

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  • jquery val() not working

    - by Vina
    jQuery val() didnt working, this is the simple script: $("#com_form").submit(function() { var name = $("#nama").val(); var komentar = $("#komentar").val(); alert.("Hi, "+name+" this is your comment: "+komentar) }); });*/ this is the HTML form: <form method="post" name="com_form" id="com_form"> <p>What is your name:<br> <input type="text" name="nama" id="nama"> </p> <p>Leave your comment here:<br> <input type="text" name="komentar" id="komentar"> </p> <p> <input type="submit" name="button2" id="button2" value="Submit"> </p> </form> actually, I was tried to create ajax post, the value "nama" is submited but not "komentar". So I tried to debug using alert (like one above) and still "komentar" is not change. What should I do?

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  • Active Directory Problem

    - by Ankur Dholakiya
    Hello All, I have one server 2008 installed with AD, SQL and IIS. Now I am trying to attach different HDD on this server only. I am able to install windows server 2008 r2 64bit on the server, but when I try to install the ActiveDirectory on the server the setup doesn't get completed and keep processing at following level. "Configuring Active directory and local host domains ......." If I attach same HDD on any other PC Active directory setups completes successfully. My server is Xeon quad core with 8GB of RAM. Can any one help the appropriate solution for this?

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  • Java Client .class File Protection

    - by Zac
    I am in the requirements phase of building a JEE application that will most likely run on a GlassFish/JBoss backend (doesn't matter for now). I know I shouldn't be thinking about architecture at requirements time, but one can't help but start to imagine how the components would all snap together :-) Here are some hard, non-flexible requirements on the client-side: (1) The client application will be a Swing box (2) The client is free to download, but will use a subscription model (thus requiring a login mechanism with server-side authentication/authorization, etc.) (3) Yes, Java is the best platform solution for the problem at hand for reasons outside the scope of this post (4) The client-side .class files need safeguarding against decompiling That last (4th) requirement is the basis of this post. I'm not really worried about someone actually decompiling and getting at my source code: in the end, it's just Swing controls driven by some lightweight business logic. I'm worried about a scenario where someone decompiles my code, modifies it to exploit/attack the server, re-compiles, and fires it up. I've envisioned all sorts of nasty solutions, but didn't know if this was a common problem with a common solution for JEE developers. Any thoughts? Not interested in "code obfuscation" techniques! Thanks for any input!

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  • NLB RPC server is unavailable on the specified computer

    - by Robin Weston
    Hi guys, Firstly, I'll admit that my networking knowledge is limited so as people request more information I'll update this question accordingly. I am trying to create a NLB Cluster across 2 Windows Server 2008 Web Servers. Neither of the machines are members of a domain, and both have 2 NICs (one for processing external web traffic, and one for communicating internally). I have installed NLB on both machines, and have created a cluster on Host A and added itself to it. However, when I try and add Host B (using the address from the external NIC) I get the following error : "The RPC server is unavailable on the specified computer". On Host B I can see that the RPC service is running fine. I can also ping and RDP from Host A to Host B with no problems either. I have disabled the windows firewall on both machines but that had no effect

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  • How can I force PHP's fopen() to return the current version of a web page?

    - by Edward Tanguay
    The current content of this google docs page is: However, when reading this page with the following PHP fopen() script, I get an older, cached version: I've tried two solutions proposed in this question (a random attribute and using POST) and I also tried clearstatcache() but I always get the cached version of the web page. What do I have to change in the following script so that fopen() returns the current version of the web page? <?php $url = 'http://docs.google.com/View?id=dc7gj86r_32g68627ff&amp;rand=' . getRandomDigits(10); echo $url . '<hr/>'; echo loadFile($url); function loadFile($sFilename) { clearstatcache(); if (floatval(phpversion()) >= 4.3) { $sData = file_get_contents($sFilename); } else { if (!file_exists($sFilename)) return -3; $opts = array('http' => array( 'method' => 'POST', 'content'=>'' ) ); $context = stream_context_create($opts); $rHandle = fopen($sFilename, 'r'); if (!$rHandle) return -2; $sData = ''; while(!feof($rHandle)) $sData .= fread($rHandle, filesize($sFilename)); fclose($rHandle); } return $sData; } function getRandomDigits($numberOfDigits) { $r = ""; for($i=1; $i<=$numberOfDigits; $i++) { $nr=rand(0,9); $r .= $nr; } return $r; } ?>

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  • Is it possible to upgrade PHP to 5.3 on a Centos Kloxo installation?

    - by Malachi
    I have a VPS running Centos with Kloxo on and I was wondering how I would upgrade the PHP to 5.3 - It's currently running 5.2.6. When I try and do a yum update I get the following errors: Resolving Dependencies --> Running transaction check --> Processing Dependency: libpq.so.4 for package: lxphp ---> Package postgresql-libs.i386 0:8.3.7-umask.7 set to be updated --> Finished Dependency Resolution lxphp-5.2.1-400.i386 from installed has depsolving problems --> Missing Dependency: libpq.so.4 is needed by package lxphp-5.2.1-400.i386 (installed) Error: Missing Dependency: libpq.so.4 is needed by package lxphp-5.2.1-400.i386 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest The program package-cleanup is found in the yum-utils package. Any help would be greatly appreciated.

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  • Should I split my website into different servers

    - by Nyxynyx
    I have a website where a user uploads photos, the photos gets resized and thumbnailed, and stored on the server. At the same time, there are some INSERTS into a MySQL table regarding the photo uploaded (like description, user id etc). The site currently runs off a managed VPS, and I love the support it provides. However it is expensive to store the many small photos and the resizing and thumbnailing processes do cause spikes on the app performance. (Amazon S3 is pretty expensive, especially considering the costs for uploading many small files) Question: Will it be a good idea to move the image processing operations and image storage to another server which is an unmanaged dedicated server with a much lower cost/gb and keep the current VPS for its 24/7 support and hosting the webapp? Or should I move the entire site to the dedicated server? VPS Specs 16 cores 2.4GHz (E5620) 1GB memory 60GB Storage 3.5TB transfer $43/mth Managed (24/7) Dedicated Specs i3 2130 2 cores 3.4+ GHz 16 GB DDR3 2 x 1TB SATA2 storage 15 TB transfer $79/mth Unmanaged (Weekdays support) Software used Apache PHP MySQL Solr PostgreSQL ImageMagick

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  • How can I install mod_dav_svn 1.6 on CentOS 5.4?

    - by Vincenzo
    I'm trying to install mod_dav_svn on CentOS 5.4, and this is what I see: # yum --enablerepo=rpmforge install mod_dav_svn Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: mirrors.adams.net * base: mirror.sanctuaryhost.com * extras: mirror.sanctuaryhost.com * rpmforge: fr2.rpmfind.net * updates: mirror.steadfast.net Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package mod_dav_svn.x86_64 0:1.4.2-4.el5_3.1 set to be updated --> Processing Dependency: subversion = 1.4.2-4.el5_3.1 for package: mod_dav_svn --> Running transaction check ---> Package subversion.i386 0:1.4.2-4.el5_3.1 set to be updated --> Finished Dependency Resolution [...] Version 1.4.2 is older than my installed Subversion 1.6.9 (I installed it before). How and where can I get mod_dav_svn in version 1.6.9?

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  • rails - when using Group_by - How to get an Index?

    - by AnApprentice
    I have the following: sets = DataSet.all.group_by{ |data| [data.project_id, "-", data.thread_id].join(" ") } <% sets.each do |range, datas| %> <p><%= range %>:</p> <% datas.each do |data| %> <%=data%> <p>Last Post<%= data.last.created_at %></p> <% end %> <% end %> Problem is that I need an index. So i updated the above with: <% sets.each_with_index do |range, datas, i| %> <p><%= range %>:</p> <% datas.each do |data| %> <%= i %> <%=data%> <p>Last Post<%= data.last.created_at %></p> <% end %> <% end %> That then breaks, with the error: undefined method `last' for 0:Fixnum Ideas? thank you

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  • Is CakePhp 'standards compliant' when generating HTML, Forms, etc?

    - by dtj
    So I've been reading a lot of "Designing with Web Standards" and really enjoying it. I'm a big CakePhp user, and as I look at the source for various form elements that Cake creates with its FormHelper, I see all sorts of extraneous In the book, he promotes semantic HTML, and writing your markup as simple / generic as possible. So my question is, am I better writing my own HTML in these situations? I really want to work in compliance with XHTML and CSS standards, and it seems I'd spend just as much time (if not more) cleaning up Cakes HTML, when I could just write my own thoughts? p.s. Here's an example in an out of the box form that CakePhp generates using the FormHelper <form id="CompanyAddForm" method="post" action="/omni_cake/companies/add" accept-charset="utf-8"><div style="display:none;"><input type="hidden" name="_method" value="POST" /></div> <div class="input text required"><label for="CompanyName">Name</label><input name="data[Company][name]" type="text" maxlength="50" id="CompanyName" /></div> <div class="input text required"><label for="CompanyWebsite">Website</label><input name="data[Company][website]" type="text" maxlength="50" id="CompanyWebsite" /></div> <div class="input textarea"><label for="CompanyNotes">Notes</label><textarea name="data[Company][notes]" cols="30" rows="6" id="CompanyNotes" ></textarea></div> <div class="submit"><input type="submit" value="Submit" /></div></form>

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  • Git graph with ref logs

    - by Francisco Garcia
    I am trying to improve my custom git log format string. I have almost everything I want except the ref names. I can already get a log similar to what I want: > git log --all --source --pretty=oneline --graph * b7c7ad3855b54e94ad7ac03f2d2e5b96d6e5ac1d refs/heads/b1 na | * 695e1482622a79230fa1d83afb8d70e86847334a refs/heads/master Merge branch 'b1' | |\ | |/ |/| * | ec21f370f82096c0208f43b390da234d92e8c74a refs/heads/b1 beta * | c6bc1f55ab3b1bd568493a5de4298dfcb4f66d8d refs/heads/b1 alfa * | 762dd868ae87753afc1cbf9803744c76f9a9e121 refs/heads/b1 tango | * 57fb27bff06ee9bb569f93ba815e9dcd69521c13 refs/heads/master little last post commit |/ | * 8d613d09b43152a7263b6e02d47ec8a4304f54be refs/heads/b3 the other commit | * e1f32b7cb86633351df06e37c2c58ef3f9fafc40 refs/heads/b3 something |/ | * 01b5c6728cf25dd576733211ce75dd3ecc29c7ba refs/heads/b2 this time a I am fighting to get a customized output with my own format string like this: > git log --pretty=format:'%h - %gD %s' --source -g b7c7ad3 - HEAD@{0} na ec21f37 - HEAD@{1} beta 01b5c67 - HEAD@{2} this time a 01b5c67 - HEAD@{3} this time a 695e148 - HEAD@{4} Merge branch 'b1' 57fb27b - HEAD@{5} little last post commit My main problem is that I cannot get the ref names I want. I assume it is one of the %g? format strings, but none of them seem to give me the full ref name. Another problem is that the %g? format strings are empty unless I walk the reflogs (-g). However git refuses to combine --graph with -g How can reproduce the first sample with a format string which I can further customize?

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  • Help Modifying Generic REST Helper PHP Example Code to Support XML DOM

    - by Jennifer Baker
    Hi! I found this example PHP source code at HTTP POST from PHP, without cURL I need some help modifying the example PHP source to support XML DOM for manipulating a REST API. I thought that if I update the CASE statement for the XML section below from $r = simplexml_load_string($res); to $r = new DOMDocument(); $r->load($res); that it would work but it doesn't. :( Any help would be appreciated. function rest_helper($url, $params = null, $verb = 'GET', $format = 'xml') { $cparams = array( 'http' => array( 'method' => $verb, 'ignore_errors' => true ) ); if ($params !== null) { $params = http_build_query($params); if ($verb == 'POST') { $cparams['http']['content'] = $params; } else { $url .= '?' . $params; } } $context = stream_context_create($cparams); $fp = fopen($url, 'rb', false, $context); if (!$fp) { $res = false; } else { // If you're trying to troubleshoot problems, try uncommenting the // next two lines; it will show you the HTTP response headers across // all the redirects: // $meta = stream_get_meta_data($fp); // var_dump($meta['wrapper_data']); $res = stream_get_contents($fp); } if ($res === false) { throw new Exception("$verb $url failed: $php_errormsg"); } switch ($format) { case 'json': $r = json_decode($res); if ($r === null) { throw new Exception("failed to decode $res as json"); } return $r; case 'xml': $r = simplexml_load_string($res); if ($r === null) { throw new Exception("failed to decode $res as xml"); } return $r; } return $res; }

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  • Spring MVC- several parts/views from a controller

    - by leeeroy
    i'm looking into using Spring MVC - how would I structure the fact that a page can be composed of several different views Consider a controller that's basically: public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { List<Post> posts = repository.getNewPosts(); return new ModelAndView("posts", "posts", posts); } However, I decide that on every page, I'd also want a side "pane" that shows data based on some logic. That "pane" would just be a .jsp that gets included from the above "posts" view, and I could change my controller to: public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { List<Post> posts = repository.getNewPosts(); List<Items> items= repository.getItems(); return new ModelAndView("model", "model", new MyCommonViewModel(posts,items)); } But then I'd have to change every controller to also do List<Items> items= repository.getItems(); , and change everything again the next time I come up with something new. This seems messy. How do I structure this ? `

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  • "blue screen" occurs when using VPN

    - by Milla Well
    I am using the VPN client "Tunnelblick" for getting access to the restricted sites of my university. This is working quite fine, until sometime out of a sudden a "blue screen" occurs which is telling me to restart the computer. I am using Mac OS X Lion on a 4,1 MacBook Air. The error report tells me, that the system crashed somewhere during processing the ipconfig thread. Is someone known to this or similar problems with Mac OS X Lion and VPN and has kind of a solution?

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  • [C#][XNA 3.1] How can I host two different XNA windows inside one Windows Form?

    - by secutos
    I am making a Map Editor for a 2D tile-based game. I would like to host two XNA controls inside the Windows Form - the first to render the map; the second to render the tileset. I used the code here to make the XNA control host inside the Windows Form. This all works very well - as long as there is only one XNA control inside the Windows Form. But I need two - one for the map; the second for the tileset. How can I run two XNA controls inside the Windows Form? While googling, I came across the terms "swap chain" and "multiple viewports", but I can't understand them and would appreciate support. Just as a side note, I know the XNA control example was designed so that even if you ran 100 XNA controls, they would all share the same GraphicsDevice - essentially, all 100 XNA controls would share the same screen. I tried modifying the code to instantiate a new GraphicsDevice for each XNA control, but the rest of the code doesn't work. The code is a bit long to post, so I won't post it unless someone needs it to be able to help me. Thanks in advance.

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  • preparing SMS app for Android KitKat

    - by Pmsc
    in agreement with the recent post from Android Developers http://android-developers.blogspot.pt/2013/10/getting-your-sms-apps-ready-for-kitkat.html ,I was trying to prepare my app to the new android version, but encountered a problem with the part they suggest to create a dialog to let the user set the app as the default application to handle SMS's : Android Developers Post public class ComposeSmsActivity extends Activity { @Override protected void onResume() { super.onResume(); final String myPackageName = getPackageName(); if (!Telephony.Sms.getDefaultSmsPackage(this).equals(myPackageName)) { // App is not default. // Show the "not currently set as the default SMS app" interface View viewGroup = findViewById(R.id.not_default_app); viewGroup.setVisibility(View.VISIBLE); // Set up a button that allows the user to change the default SMS app Button button = (Button) findViewById(R.id.change_default_app); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(Telephony.Sms.Intents.ACTION_CHANGE_DEFAULT); intent.putExtra(Telephony.Sms.Intents.EXTRA_PACKAGE_NAME, myPackageName); startActivity(intent); } }); } else { // App is the default. // Hide the "not currently set as the default SMS app" interface View viewGroup = findViewById(R.id.not_default_app); viewGroup.setVisibility(View.GONE); } } } the code itself in pretty much straightforward, but I'm unable to access to Telephony.Sms.getDefaultSmsPackage because it says that Telephony cannot be resolved, and I can't find any import or declaration that would fix that. Can anyone please help? Thanks in advanced.

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  • Rails rspec expects Admin::PostsController, which is there.

    - by berkes
    I have a file app/controllers/admin/posts_controller.rb class Admin::PostsController < ApplicationController layout 'admin' # GET /admin/posts def index @pposts = Post.paginate :page => params[:page], :order => 'created_at DESC' end # ...Many more standard CRUD/REST methods... end And an rspec test spec/controllers/admin/posts_controller_spec.rb require 'spec_helper' describe Admin::PostsController do describe "GET 'index'" do it "should be successful" do get 'index' response.should be_success end end #...many more test for all CRUD/REST methods end However, running that spec throws an error. I have no idea what that error means, nor how to start solving it. /home/...../active_support/dependencies.rb:492:in `load_missing_constant': Expected /home/...../app/controllers/admin/posts_controller.rb to define Admin::PostsController (LoadError) I may have it all set up wrong, or may be doing something really silly, but all I want is my CRUD actions on /admin, with separate before filters and a separate layout. And to test these controllers. EDIT ZOMG, made a terrible copy-paste error into this SO posting. The controller was PostsController, not the PagesController that I pasted into there. Problem still stands, as my code is correct, just the SO post, here was wrong.

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  • How to color HTML elements based on a user command string

    - by Anonymous the Great
    When you type something like "red:Hi:" it will type "Hi" in red. The following script does not work and I do not know why, (The one who made the sorting PHP function is Graphain, thanks again!) <?php function getit($raw) { # If the value was posted $raw = isset($raw) ? $raw : ""; # Split it based on ':' $parsed = explode(':', $raw); $colorClass = ""; $text = ""; if (count($parsed) >= 2) { $colorClass = $parsed[0]; $text = $parsed[1]; $text = "~~~" . $text . "~~~" . $colorClass; return $text; } } ?> <script type="text/javascript"> function postit() { var preview = document.getElementById("preview").value; var submit = document.getElementById("post").value; var text = <?php getit(submit); ?> var t = text[0]; preview = t; } </script> <textarea id="preview" cols=70 rows=5 readonly>Preview box</textarea> <p> <textarea id="post" cols=70 rows=5/>Submit box</textarea> <p> <input type="button" onclick="postit();" value="Submit"/>

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  • On Mikrotik RouterOS, is it possible to get Netflow information from a bridged connection?

    - by Tim
    I have a RouterOS box set up to bridge two ethernet connections. I have use-ip-firewall=yes in the bridge configuration, so that the ports go through the firewall. I've enabled netflow reporting via ip/traffic-flow, but the only packets I see reported are broadcast and multicast packets, not the packets that are flowing through the bridge. The documentation indicates that traffic flow logging happens after firewall processing and that it won't work with bridged connections by default, but I would have thought that use-ip-firewall=yes ought to address this. Is it possible to make this work somehow?

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  • Asynchronous event loop design and issues.

    - by Artyom
    Hello, I'm designing event loop for asynchronous socket IO using epoll/devpoll/kqueue/poll/select (including windows-select). I have two options of performing, IO operation: Non-blocking mode, poll on EAGAIN Set socket to non-blocking mode. Read/Write to socket. If operation succeeds, post completion notification to event loop. If I get EAGAIN, add socket to "select list" and poll socket. Polling mode: poll and then execute Add socket to select list and poll it. Wait for notification that it is readable writable read/write Post completion notification to event loop of sucseeds To me it looks like first would require less system calls when using in normal mode, especially for writing to socket (buffers are quite big). Also it looks like that it would be possible to reduce the overhead over number of "select" executions, especially it is nice when you do not have something that scales well as epoll/devpoll/kqueue. Questions: Are there any advantages of the second approach? Are there any portability issues with non-blocking operations on sockets/file descriptors over numerous operating systems: Linux, FreeBSD, Solaris, MacOSX, Windows. Notes: Please do not suggest using existing event-loop/socket-api implementations

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