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• Escape not idempotent in zsh's vi emulation?

  - by user1063042

  I have zsh configured to use vi keybindings. I've noticed some unexpected behavior with "escape". In vim (I haven't tested vanilla vi) if I hit escape twice, I can hit 'i' once to return to insert mode. In zsh if I happen to hit escape twice, hitting 'i' won't return me to insert mode, I have to hit it twice. Another example of this comes up in navigation. If I hit escape once, I can use '^' and '$' as expected. But if I've accidentally hit escape twice (or more) they fail to work until I return to insert mode and escape again. Do I somehow have zsh configured incorrectly, or is this just a known difference in zsh's vi emulation?

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• Perform action based on load avg

  - by sfx

  I'm running some web applications on an debian server and have to struggle with ddos attacks sometimes. It's eating up all my resources and I can't ssh anymore into the server. An idea was to drop all connections if the load avg is too high, so there are still resources for me and accept new connections if the load avg is low enough. Since this has to work under heavy load I'm afraid a cronjob wouldn't be fast enough or take too much resources. tl;dr: Is there a way to configure the behavior if the load avg is above a specific threshold?

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• Redirect one input from one terminal to another

  - by Niki Yoshiuchi

  I have sshed into a linux box and I'm using dvtm and bash (although I have also tried this with Gnu screen and bash). I have two terminals, current /dev/pts/29 and /dev/pts/130. I want to redirect the input from one to the other. From what I understand, in /dev/pts/130 I can type: cat </dev/pts/29 And then when I type in /dev/pts/29 the characters I type should show up in /dev/pts/130. However what ends up happening is that every other character I type gets redirected. For example, if I type "hello" I get this: /dev/pts/29 | /dev/pts/130 $ | $ cat </dev/pts/29 $ el | hlo This is really frustrating as I need to do this in order to redirect the io of a process running in gdb (I've tried both run /dev/pts/# and set inferior-tty /dev/pts/# and both resulted in the aforementioned behavior). Am I doing something wrong, or is this a bug in bash/screen/dvtm?

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• openssl error wehn compiling Ruby from source

  - by Florian Salihovic

  Prelude: I don't want to use rvm. I installed ruby 2 with the following configuration on Mac OS X 10.8.5 ./configure --prefix=/usr/local \ --enable-pthread \ --with-readline-dir=/usr/local \ --enable-shared It is installed, version is printed correctly ... Now, when invoking gem install jekyll I get the following error: ERROR: Loading command: install (LoadError) cannot load such file -- openssl ERROR: While executing gem ... (NoMethodError) undefined method `invoke_with_build_args' for nil:NilClass I installed openssl into /usr/local but i'm really banging my head against the wall on how installing gems. It can't be that big of a deal right?

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• Building a subquery with ARel in Rails3

  - by Christopher

  I am trying to build this query in ARel: SELECT FLOOR(AVG(num)) FROM ( SELECT COUNT(attendees.id) AS num, meetings.club_id FROM `meetings` INNER JOIN `attendees` ON `attendees`.`meeting_id` = `meetings`.`id` WHERE (`meetings`.club_id = 1) GROUP BY meetings.id) tmp GROUP BY tmp.club_id It returns the average number of attendees per meeting, per club. (a club has many meetings and a meeting has many attendees) So far I have (declared in class Club < ActiveRecord::Base): num_attendees = meetings.select("COUNT(attendees.id) AS num").joins(:attendees).group('meetings.id') Arel::Table.new('tmp', self.class.arel_engine).from(num_attendees).project('FLOOR(AVG(num))').group('tmp.club_id').to_sql but, I am getting the error: undefined method `visit_ActiveRecord_Relation' for #<Arel::Visitors::MySQL:0x9b42180> The documentation for generating non trivial ARel queries is a bit hard to come by. I have been using http://rdoc.info/github/rails/arel/master/frames Am I approaching this incorrectly? Or am I a few methods away from a solution?

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• how to read element when we have multiple class in jquery

  - by pritisolanki

  Hi, I have a multiple div almost more than 50 and there are some div with class "holiday" Example: <div class="fc-event fc-event-vert fc-corner-top fc-corner-bottom **holiday**" style="position: absolute; z-index: 8; top: 0px; left: 61px; width: 71px; height: 40px;">content</div> I am trying to identify this div in jquery and modify the width from 71 to 80 px .. i tried $('div.holiday') it return object but when i try $('div.holiday').attr('width') it return undefined... Can someone help me in this how i can resolve this issue. Regards Priti

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• Excel - Avoid cell text to be shown onto next empty cell

  - by e-mre

  When you have text in an Excel cell that is too long to be shown in the visible area of a single cell and the cell next to the first cell (the one on the right) is empty, Excel lets the text to be printed onto the next cell. This is what I want to change. I want to avoid this text overflow. I know I can avoid this by enabling "word wrap" and adjusting row height. But that is not what I want. I want to change the DEFAULT behavior of Excel so it shows the value of each cell only in the visible area of that cell. No overflow, no word wrap. Is this possible? (I am using Excel 2010 by the way)

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• WCF service using duplex channel in different domains

  - by ds1

  I have a WCF service and a Windows client. They communicate via a Duplex WCF channel which when I run from within a single network domain runs fine, but when I put the server on a separate network domain I get the following message in the WCF server trace... The message with to 'net.tcp://abc:8731/ActiveAreaService/mex/mex' cannot be processed at the receiver, due to an AddressFilter mismatch at the EndpointDispatcher. Check that the sender and receiver's EndpointAddresses agree. So, it looks like the communication just work in one direction (from client to server) if the components are in two separate domains. The Network domains are fully trusted, so I'm a little confused as to what else could cause this? Server app.config <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="JobController.ActiveAreaBehavior"> <serviceMetadata httpGetEnabled="false" /> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="JobController.ActiveAreaBehavior" name="JobController.ActiveAreaServer"> <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration="" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="net.tcp://SERVER:8731/ActiveAreaService/" /> </baseAddresses> </host> </service> </services> </system.serviceModel> </configuration> but I also add an end point programmatically in Visual C++ host = gcnew ServiceHost(ActiveAreaServer::typeid); NetTcpBinding^ binding = gcnew NetTcpBinding(); binding->MaxBufferSize = Int32::MaxValue; binding->MaxReceivedMessageSize = Int32::MaxValue; binding->ReceiveTimeout = TimeSpan::MaxValue; binding->Security->Mode = SecurityMode::Transport; binding->Security->Transport->ClientCredentialType = TcpClientCredentialType::Windows; ServiceEndpoint^ ep = host->AddServiceEndpoint(IActiveAreaServer::typeid, binding, String::Empty); // Use the base address Client app.config <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <bindings> <netTcpBinding> <binding name="NetTcpBinding_IActiveAreaServer" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="524288" maxBufferSize="65536" maxConnections="10" maxReceivedMessageSize="65536"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="Transport"> <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" /> <message clientCredentialType="Windows" /> </security> </binding> </netTcpBinding> </bindings> <client> <endpoint address="net.tcp://SERVER:8731/ActiveAreaService/" binding="netTcpBinding" bindingConfiguration="NetTcpBinding_IActiveAreaServer" contract="ActiveArea.IActiveAreaServer" name="NetTcpBinding_IActiveAreaServer"> <identity> <userPrincipalName value="[email protected]" /> </identity> </endpoint> </client> </system.serviceModel> </configuration> Any help is appreciated! Cheers

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• Compiling SWIG library for Ruby on Mac OS X fails

  - by Stefan Schmidt

  I tried to compile the following SWIG library for Ruby and everything went smooth until the last step. /* File : computation.c */ int add(int x, int y) { return x + y; } /* File: computation.i */ %module computation extern int add(int x, int y); $ swig -ruby computation.i $ gcc -c computation.c $ gcc -c computation_wrap.c -I/opt/local/lib/ruby/1.8/i686-darwin10 $ gcc -shared computation.o computation_wrap.o -o computation.so Undefined symbols: "_rb_str_cat", referenced from: _Ruby_Format_TypeError in computation_wrap.o "_rb_exc_new3", referenced from: _SWIG_Ruby_ExceptionType in computation_wrap.o "_rb_define_class_under", referenced from: _SWIG_Ruby_define_class in computation_wrap.o _SWIG_Ruby_define_class in computation_wrap.o [...] ld: symbol(s) not found collect2: ld returned 1 exit status My configuration: $ sw_vers ProductName: Mac OS X ProductVersion: 10.6.3 BuildVersion: 10D575 $ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin10] $ swig -version SWIG Version 1.3.40 Compiled with /usr/bin/g++-4.2 [i386-apple-darwin10.3.0] $ gcc --version i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5646)

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• Compile Error Using singleton - iPhone SDK

  - by mrburns05

  Since someone here is a bit hot-headed and deleted my last question ill post a new one with a title to better please his ego...Hows this Michael? Anyways, im getting this error when i compile: Undefined symbols: "_OBJC_CLASS_$_SortedItems", referenced from: __objc_classrefs__DATA@0 in SortedByNameTableDataSource.o ld: symbol(s) not found collect2: ld returned 1 exit status Basically i followed apples "TheElements" sample app to create the singleton, tableview datasource and just changed some stuff around to suit my needs - ive triple checked all my code and cannot figure out why im getting this.. If anyone can help please do, it would be much appreciated. if more of my code is needed ill post.. let me know

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• Rails3. How do I display two different objects in a search?

  - by JZ

  I am using a simple search that displays search results: @adds = Add.search(params[:search]) In addition to the search results I'm trying to utilize a method, nearbys(), which displays objects that are close in proximity to the search result. The following method displays objects which are close to 2, but it does not display object 2. How do I display object 2 in conjunction with the nearby objects? @adds = Add.find(2).nearbys(10) While the above code functions, when I use search, @adds = Add.search(params[:search]).nearbys(10) a no method error is returned, undefined methodnearbys' for Array:0x30c3278` How can I search the model for an object AND use the nearbys() method AND display all results returned?

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• Is this a normal operating temperature range for a New Third-Generation MacBook Air (2.13 MHz, 120 G

  - by doug

  Even with just my text editor open (no web browser) and maybe the terminal, the baseline temperature is usually above 40 C. When i open 4-5 browser tabs in Safari (even if none of Sites have Flash) the temp can quickly go over 50 C. (In addition, i am observing these temps even though i have turned the fan up to 3000 rpms). (i have install smcFanControl on my MBA so i can see the temp in the menu bar.) So this means my MBA is running much warmer than my MBP; and in practice, it means that i have to be very careful how i use my MBA. Of course if i load a Site with Flash, it just freaks out, and often quickly goes above 65 C (I've installed a flash blocker to avoid this). Is anyone else observing this behavior? I have checked the Apple boards and sure enough, there are a lot of complaints, but nothing from Apple.

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• JavaScript setInterval loop not holding variable

  - by Ryan

  Here is my code: var showNo = 1; window.setInterval(function() { console.log(showNo); if(showNo === 1) { var nextNo = 2; } else if(showNo === 2) { var nextNo = 3; } else if(showNo === 3) { var nextNo = 4; } else if(showNo === 4) { var nextNo = 5; } else if(showNo === 5) { var nextNo = 1; } else { var showNo = 1; var nextNo = 2; } var showNo = nextNo; }, 500); My question is, why is the showNo variable not holding when the setInterval loop starts? The console displays 'undefined' in the above example. This may be a simple question, but I am trying to teach myself query and this has me stuck.. Any answers would be great. Thanks.

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• Showing protocol specific mini icons for Jabber/XMPP gateway contacts

  - by aef

  Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. I'm using a gateway service on the side of my Jabber/XMPP server to communicate with lots of contacts over proprietary networks like ICQ or MSN. So I don't use Empathy's native support for ICQ and MSN, and I don't want to change back to using such a thing for various reasons. One thing that annoys me is that Empathy does not make it clear to me that these contacts are from another instant messaging network. If I enable the View Show Protocols option they are all recognized as Jabber/XMPP contacts. Although I perfectly understand why that happens, I would like to be able to change this behavior to make Empathy mark these contacts correctly. Is there a configuration option or a plugin for this? Or may this feature still be in development and will be available later?

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• How to remove $data stream from file in windows 8

  - by chris.w.mclean

  Windows for a while now has added an additional hidden stream to files that were downloaded from the internet. If you attempted to use these files, you'd get all kinds of odd behavior as windows was detecting this additional stream and then preventing the app / exe from getting all sorts of security clearance. But in previous versions of windows you could right click on a file, go to properties then click 'Unblock' which removed the extra stream. Windows 8 seems to be doing the additional streams trick, but I haven't yet found a way to remove them using the win 8 UI. Anyone know how to do this?

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• tcsh `cd` always issues a printout of `$PWD`. How do I disable this?

  - by Ross Rogers

  Someone in IT thought it would be a good idea to modify the default behavior of the command cd in our tcsh environment. As of Monday the "upgraded" version of cd always prints out $PWD after it navigates to the new directory. e.g. % cd ~/ Directory: /nfs/pdx/home/rbroger1 which cd yields no results so it isn't being alias'd. Is there some environment variable or normal tcsh variable that is being set in our setup scripts to produce this output? I don't want to change all my scripts to use a wrappered or alias'd cd. I just want plain ol' cd.

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• IPv4 private address assignment

  - by helloworld922

  I'm working on a private network which uses static IPv4 addresses as well as DHCP addressing for the physical LAN network. At a previous company I worked at they would assign static addresses in the 10.*.*.* space and all DHCP/LAN addresses were assigned in the 192.168.*.* space. Both of these address spaces are defined in the IPv4 private address space and there were never any internal conflicts. From personal experience at home, school, at work, and pretty much any other machine I've dealt with extensively (Windows and a few Linux distros), the DHCP server would always by default choose an address from the 192.168.*.* address space. Now my question is can I rely on this behavior? Do DHCP servers always by default assign from the 192.168.*.* pool (or any pool other than the 10.*.*.* pool), leaving the 10.*.*.* pool free for private static addressing? If not, under what conditions might a DHCP server choose an address in the 10.*.*.* address space?

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• How can I make Firefox remember my session while still clearing browsing history on close?

  - by Philip

  I am aware, thanks to this thread ( https://support.mozilla.com/en-US/forum/1/381229 ), that Firefox doesn't save sessions when browsing history is cleared at close, as effectively the open tabs are themselves cleared from the history before the session is saved. But I would like Firefox to behave differently. Is there any way to change Firefox's behavior so it will clear my browsing history when it closes, but remember only that a certain list of tabs were open, and then restore those tabs when it opens (not even necessarily with those tabs' histories)? I'm running FF 3.5.6 on Mac OS X 10.5. Thanks.

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• JCarousel scroll method does not always fire

  - by Scott Faisal

  var carousel = jQuery('#mycarousel').data('jcarousel'); var index = carousel.size() + 1; carousel.size(index); var html = '<li> some html </li>'; carousel.add(index, html); carousel.scroll(index, 1); The very last scroll method fires but not always. Is this a bug in JCarousel? The following is the code for the scroll method in JCarousel: /** * Scrolls the carousel to a certain position. * * @method scroll * @return undefined * @param i {Number} The index of the element to scoll to. * @param a {Boolean} Flag indicating whether to perform animation. */ scroll: function(i, a) { if (this.locked || this.animating) return; this.animate(this.pos(i), a); }

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• Microsoft Office "Read-only" warning not appearing on Samba shares on Mac OS X Server

  - by bongo

  Hi, some of my users don't get the "read-only" warning (but "read-only" does appear on the title bar and the document is indeed opened read-only) when opening Office 2007 documents already opened by another user. We run the samba share off an XSan volume under Mac OS X 10.5.8 Server. Strict locking is on but oplocks are off (from Server Admin). At home, with a simple samba share in 10.6.3 server, it works correctly. Any ideas? or is this a 10.5.8 behavior?

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• Thunderbird 3.0 - how to prevent new message indicator from clearing?

  - by Joe Casadonte

  I just installed Thunderbird 3.0 and there are a few things driving me batty. When new email is delivered it has a faint star to the left of the subject (this is different than the new star column thing). In the old days (i.e. last week) the new message indicator wouldn't go away until I read the message or left the folder and returned. Now, as soon as I do anything with any email message, all new message indicators are cleared. How can I go back to the old behavior? Thanks!

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• Using gnome-do as a dock

  - by Manu

  Hello, I've recently removed the bottom toolbar, in Ubuntu, and replaced it with gnome-do, using the "Docky" theme. Things looks nice, but I have a couple of questions : The dock doesn't differentiate between a shortcut and the application itself when launched. What if I want to launch more than one time that app ? (ie. the console). The dock shows all apps launched, not just the apps launched on that particular desktop. Can I change this behavior ? I haven't found it in the preferences. (image from the blog "OMG Ubuntu", http://d0od.blogspot.com/ )

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• Return value from ajax call?

  - by Dan

  Hi, I'm making a basic ajax function in jquery which echoes the number of rows found in a MySQL Query. function checkEventIDClass(id) { var params = 'method=checkEventIDClash&table=test&id=' + id; $.ajax({ type: "POST", url: "ajax.php", data: params, success: function(result){ return result; } }); } Is it possible to use this returned value in another function? I have tried but only get undefined values. In this situation, it will be acceptable to use synchronous calls. Any advice appreciated. Thanks

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• How can I install a custom (patched) PECL extension?

  - by JKS

  I'm trying to use the htscanner PECL extension on my CentOS 5/PHP 5.2.6 machine, but there's a bug in the latest version where a newline character is added to the end of every php_value directive. This behavior causes my include_path and error_log values not to work. The bug and the patch are documented on the PECL site: http://pecl.php.net/bugs/bug.php?id=16891 I've downloaded the latest version, applied the patch, and re-compressed the package — but I can't get the PECL installer to accept it — or any local package, for that matter. I've tried every variation of the pecl install syntax that I can think of, and the only times I'm able to get it to work, it downloads an online copy first and ignores the local copy. Can anyone recommend a method for installing a PECL extension from a local file? Thanks for your consideration.

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• Rails - How do i update a records value in a join model ?

  - by ChrisWesAllen

  I have a join model in a HABTM relationship with a through association (details below). I 'm trying to find a record....find the value of that records attribute...change the value and update the record but am having a hard time doing it. The model setup is this User.rb has_many :choices has_many :interests, :through => :choices Interest.rb has_many :choices has_many :users, :through => :choices Choice.rb belongs_to :user belongs_to :interest and Choice has the user_id, interest_id, score as fields. And I find the ?object? like so @choice = Choice.where(:user_id => @user.id, :interest_id => interest.id) So the model Choice has an attribute called :score. How do I find the value of the score column....and +1/-1 it and then resave? I tried @choice.score = @choice.score + 1 @choice.update_attributes(params[:choice]) flash[:notice] = "Successfully updated choices value." but I get "undefined method score"......What did i miss?

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