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• Can I create a collection in Scala that uses different equals/hashCode/compare implementations?

  - by Willis Blackburn

  I'm looking for as simple way to create an identity set. I just want to be able to keep track of whether or not I've "seen" a particular object while traversing a graph. I can't use a regular Set because Set uses "==" (the equals method in Scala) to compare elements. What I want is a Set that uses "eq." Is there any way to create a Set in Scala that uses some application-specified method for testing equality rather than calling equals on the set elements? I looked for some kind of "wrapEquals" method that I could override but did not find it. I know that I could use Java's IdentityHashMap, but I'm looking for something more general-purpose. Another idea I had was to just wrap each set element in another object that implements equals in terms of eq, but it's wasteful to generate tons of new objects just to get a new equals implementation. Thanks!

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• PHP Doxygen Collaboration Diagrams

  - by Shabbyrobe

  I've started playing around with doxygen to generate documentation from my PHP code. I notice there are two diagrams in the generated output - inheritance and collaboration. I know about the inheritance one, but the collaboration one has piqued my interest since reading the manual: If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen will generate a graph for each documented class showing the direct and indirect implementation dependencies (inheritance, containment, and class references variables) of the class with other documented classes. The impression I get from that description is that composition relationships should be represented by the collaboration diagram as well, but it always seems to just be identical to the inheritance one. Is there something I can do to hint to Doxygen the things I would like to appear in this diagram? Does it just not work with PHP?

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• iOS Facebook SDK: FBRequestDelegate only works on AppDelegate??

  - by RMR

  Hi guys, I want to encapsulate all my Facebook interactions within a FacebookFacade class to keep things clean and tidy. I have an instance of the iOS SDK Facebook class within my FacebookFacade. My problem is that when I make a Graph API call within the facade, such as: [self.facebook requestWithGraphPath:@"me" andDelegate:self]; the only method of FBRequestDelegate that gets called is requestLoading: and nothing else. I have tried putting similar code in other places, like in controllers and other models, and there too not all of the FBRequestDelegate methods get called, only requestLoading:. In fact the only way I can get the other FBRequestDelegate methods to be called is to put all my Facebook logic in the AppDelegate and make my AppDelegate the FBRequestDelegate. Why is this the case? Am I missing something here? I definitely do not want to use the AppDelegate as my FBRequestDelegate as I don't want to confuse the purpose of the AppDelegate. Thanks.

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• How do I start mysqld with options

  - by xiankai

  I need to start up mysqld with command line options as from here: http://dev.mysql.com/doc/refman/5.1/en/server-options.html#option_mysqld_skip-grant-tables I normally do sudo service mysqld start, but passing the option as sudo service mysqld start --skip-grant-tables does not seem to work. Alternatively I have tried starting as a daemon, sudo mysqld_safe --skip-grant-tables & But it seems to terminate too soon: 131101 04:59:57 mysqld_safe Logging to '/var/lib/mysql/vagrant.example.com.err'. 131101 04:59:57 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 131101 05:00:03 mysqld_safe mysqld from pid file /var/lib/mysql/vagrant.example.com.pid ended My last option seems to specify the option in /etc/my.cnf instead, but is there any way to do it via the command line?

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• postgresql 9.1 Multiple Cluster on same host

  - by user1272305

  I have 2 cluster databases, running on the same host, Ubuntu. My fist database port is set to default but my second database port is set to 5433 in the postgresql.conf file. While everything is ok with local connections, I cannot connect using any of my tools to the second database with port 5433, including pgAdmin. Please help. Any parameter that I need to modify for the new database with port 5433? netstat -an | grep 5433 shows, tcp 0 0 0.0.0.0:5433 0.0.0.0:* LISTEN tcp6 0 0 :::5433 :::* LISTEN unix 2 [ ACC ] STREAM LISTENING 72842 /var/run/postgresql/.s.PGSQL.5433 iptables -L shows, Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• How can I VPN into a domain and act as if it is local?

  - by Duall

  I've looked and looked and the internet seems to have finally failed me, there's no information on my specific issue. I have two locations, and one server (sbs 2008); I need them to act like one physical LAN. I know it's possible, I just know how to set it up, or anything about VPNs, etc. So, just to clarify a bit more: 1 Small Business Server 2008 ~30 Computers with varying systems from Windows XP to 7 2 Physical Locations I use redirected folders, but since that would consume a lot of bandwith over VPN, I have a machine over there that can be the workhorse for storage. Users need to access e-mail and shared databases from this server (or possibly some form of DFS with aforementioned workhorse) from the other building. Is there a nice tutorial (or I nice person that wants to write it) online that can explain how to set up computers from an external network to act like they were in the LAN?

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• How can I make a group bar plot in ggplot2?

  - by maximusyoda

  I have four of these kind of dataframes each with a different name (Apple,Ball,Cat) with different values of frequency but same 4 season names Seasons Frequency DJF 9886 JJA 5408 MAM 12876 SON 6932 And I am trying to make a group bar plot. The graph I'm looking for is like this, where c,d,e,f will be the names - Apple, Ball, Cat. Y-axis will be Frequency Each group will have 4 bars: DJF,JJA,MAM,SON Filled by seasons The number of Frequency written above the bar plot. How can I format the data to make it suitable for ggplot (cbind, melt etc) and use it in ggplot?

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• Exchange 2010 Autodiscover/OAB update issue

  - by bulldog5046

  Mid way through migration from 2003 to 2010 and with a few test users on 2010 i've noticed that the OAB is not being downloaded to outlook clients. I've checked the URL's are configured, addded both our CAS servers to the web based distribution list for the OAB and assigned the OAB to 2 mailbox databases we use but when i use outlook 'Test E-Mail AutoConfiguration' test i still see that the autodiscover says "OAB URL: Public Folder" even though i've now deselected the option. I've ran Test-OutlookWebServices to which i was getting an OAB error about no URL in the autodiscovery but having just re-ran it now appears fine, yey the autoconfigure test still does not. Does anyone have any idea why i'm getting this discrepency?

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• NHibernate parent-childs save redundant sql update executed

  - by Broken Pipe

  I'm trying to save (insert) parent object with a collection of child objects, all objects are new. I prefer to manually specify what to save\update and when so I do not use any cascade saves in mappings and flush sessions by myself. So basically I save this object graph like: session.Save(Parent) foreach (var child in Parent.Childs) { session.Save(child); } session.Flush() I expect this code to insert Parent row, then each child row, however NHibernate executes this SQL: INSERT INTO PARENT.... INSERT INTO CHILD .... UPDATE CHILD SET ParentId=@1 WHERE Id=@2 This update statement is absolutely unnecessary, ParentId was already set correctly in INSERT. How do I get rid of it? Performance is very important for me.

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• Shared volume for data (multiple MDF) and another shared volume for logs (multiple LDF)

  - by hagensoft

  I have 3 instances of SQL Server 2008, each on different machines with multiple databases on each instance. I have 2 separate LUNS on my SAN for MDF and LDF files. The NDX and TempDB files run on the local drive on each machine. Is it O.K. for the 3 instances to share a same volume for the data files and another volume for the log files? I don't have thin provisioning on the SAN so I would like to not constaint disk space creating multiple volumes because I was adviced that I should create a volume (drive letter) for each instance, if not for each database. I am aware that I should split my logs and data files at least. No instance would share the actual database files, just the space on drive. Any help is appretiated.

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• Optimal Disk Setup for OLTP SQL Server

  - by Chris

  We have a high transaction (lots of reads and writes) database server (running SQL 2005) that is currently set up with a RAID 1 OS partition (C:) and a RAID 5 data/log/tempdb partition (D:). The C: has 2 drives and the D: has 4 drives. The server has around 300 databases ranging from 10MB to 2GB in size. I have been reading up on best practices for partioning the disks, but would like some opinions on our setup since we are so limited in the number of disks. It seems like RAID 10 is popular, but I dont think we could use it with only 6 total disks to work with. Thanks. Update I went with 3 RAID 1 Partitions (2 disks each) Partition 1: OS, TempDB, Backups Partition 2: Logs Partition 3: Data

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• Recommend a Software for documenting work/research

  - by Rogue

  Need a software for documenting my work & research. I was considering to use blog engine but then I don't want to be playing around with backing up the databases and the matter separately. The specifications for the software would be: 1) To catalogue work by categories, tags and date. 2) Easy editing and drawing features 3) Easily incorporate saved html files into matter I'm writing, with the formatting and pictures. (probably use the mht format, don't want to be wasting timeformatting html pages) Would like the html pages to be directly displayed in the software and not opened on demand Software should be for Windows. Any recommendations? 4) Language tools could be an addition but only an optional feature

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• Get the tags of a document in Subversion

  - by Onno

  I was wondering if there is a way to easily see the tags of a specific file in Subversion using the command line and/or TortoiseSVN. Most version control system allow you to see easily access the tags/labels of a file. When using TortoiseSVN I can do this when I access the "Revision Graph". This however is a operation that takes around 44 minutes. I consider this very hard work just to know what tags have been created for the file. Is there another way to do it? Or is there no way to instantaneously access tag information. Thanks, Onno

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• Corrupt mysql system tables

  - by psynnott

  I am having issues with the columns_priv table in the mysql system database. I cannot add new users currently. I have tried repairing it using mysqlcheck --auto-repair --all-databases --password but I get the following output: mysql.columns_priv Error : Incorrect file format 'columns_priv' error : Corrupt Is there any other way to repair this table, or how do I go about replacing it with a blank table? What would I lose by doing that? Thank you Edit (Additional Info) mysqld is currently using 100% cpu constantly. Looking at show processlist, I get: mysql> show processlist; +-----+------------------+-----------+-------+---------+------+-------------------+------------------------------------------------------------------------------------------------------+ | Id | User | Host | db | Command | Time | State | Info | +-----+------------------+-----------+-------+---------+------+-------------------+------------------------------------------------------------------------------------------------------+ | 5 | debian-sys-maint | localhost | mysql | Query | 1589 | Opening tables | ALTER TABLE tables_priv MODIFY Column_priv set('Select','Insert','Update','References') COLL | | | 752 | root | localhost | NULL | Query | 0 | NULL | show processlist | +-----+------------------+-----------+-------+---------+------+-------------------+------------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)

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• Should I create subclass NSManagedObject or not?

  - by TP

  Hi, I have spent a few days learning and writing NSCoding and finally got it working. However, it took very long to archive and unarchive the (quite complex) object graph, which is unacceptable. After searching the internet for some time, I think the better way is to use core data. Do you recommend that 1) I should rewrite all my classes as subclasses of NSManagedObject or 2) should I create an instance variable of NSManagedObject in each of my class so that any changes to the class also updates its core data representation? Doing either way will need significant changes to the exiting classes and I think I have to update lots of unit test cases as well if it changes the way the classes are initialized. What do you recommend? I really don't want to head to the wrong approach again... Thanks!

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• How do I check to see if an apt lock file is locked?

  - by gondoi

  I am writing a script to do some apt commands, but I am running into potential issues of the apt/dpkg databases being locked so my script bails. I want to check the lock files (i.e. /var/lib/dpkg/lock) before doing anything just like apt does when it runs it's command, but I can't figure out how apt is performing the lock. The lock file is always there, and apt-get is not doing a flock on the file. How else would it be checking to see if it is in use? From an strace I see that apt-get opens the file, but that is it. In my script, I can open the file while apt-get has it open as well.

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• SQL 2008. I have user in a db which has no login on the server. How is it possible?

  - by Boppity Bop

  I am talking about windows authentication. I dont have access to the server adming rights but a dbadmin sent me screenshot where my user is not in the logins of the server. and also there is only one windows group called admin - databases which I am 100% sure my guy cannot be part of it. BUT... his username is in users of my db... How come user can appear in a db not having login on the server? P.S. in the logs it prints: Login failed for user 'xxxx'. Reason: Token-based server access validation failed with an infrastructure error. Check for previous errors

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• Best way to troubleshoot apache not starting?

  - by lowgain

  We have recently gotten a backup server to mirror all our data onto in case the primary server goes down. I've gotten all the sites data updated through rsync, and all the apache config and databases updated. Both machines are on Ubuntu 9 (9.04 on the primary, 9.10 on the backup). So everything seems synced up for the most part at this point (still need to figure out user syncing), and I try to start Apache. I get * Starting web server apache2 [fail] Nothing else indicating what the problem could be. I know I don't have enough info to expect a solution from you guys, so I'd just like to know where I can go from here to further investigate this issue. Would there be any error logs for this? Thanks!

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• open flash chart help needed

  - by Carlos Barbosa

  def reparto_de_ventas_por_marca #obtener los montos de las ventas en el periodo comprendido y sumarlas @ventas = Venta.find(:all) @marcas = Marca.find(:all) title = Title.new("Ingresos de este mes: #{@total}") pie = Pie.new pie.start_angle = 35 pie.animate = true pie.tooltip = '#val# de #total#<br>#percent# de 100%' pie.colours = ["#245a9c", "#fff"] pie.values = [ @marcas.each do |result| PieValue.new(result.ventas.count, result.name) end ] chart = OpenFlashChart.new chart.title = title chart.add_element(pie) chart.x_axis = nil render :text => chart.to_s end It just doesn't works i need to get the values to create a graph with flash chart. any help will be appreciated.

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• Doctrine inserts when it should update

  - by Goran Juric

  I am trying to use do the most simple update query but Doctrine issues an INSERT statement instead of an UPDATE. $q = Doctrine_Query::create() ->from('Image i') ->where('id = ?'); $image = $q->fetchOne($articleId, Doctrine_Core::HYDRATE_RECORD); $image->copyright = "some text"; $image->save(); I have also tried using the example from the manual, but still a new record gets inserted: $userTable = Doctrine_Core::getTable('User'); $user = $userTable->find(2); if ($user !== false) { $user->username = 'Jack Daniels'; $user->save(); } edit: This example from the manual works: $user = new User(); $user->assignIdentifier(1); $user->username = 'jwage'; $user->save(); The funny thing is that I use this on another model and there it works OK. Maybe I have to fetch the whole array graph for this to work (I have another model in a one to many relationship)?

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• Can you link to a good MySQL dumper PHP script?

  - by Ivan

  I need to migrate a website to another host. I have only FTP server access and MySQL name+pass (the MySQL server's IP I was provided is 127.0.0.1, and there's neither PhpMyAdmin nor SSHell to use). A web app run there can access the DB using credentials I know and localhost server. So I'd need a PHP script, that will correctly dump all the available databases of the MySQL server so that they can be imported on the new server. Can you recommend a good one?

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• Facebook Api - Local development, Testserver, Liveserver ... How?

  - by Thijs Kaspers

  I'm working on a new website that uses the Facebook API for users to login and several implementations of the graph Api. My workflow usually is: Development on localhost Development using MAMP/XAMPP or similar software Push to server - testing domain A team of people can test the changes for a few days to see if everything works as planned. Push to server - live domain Changes are live for public Facebook uses the site URL in the appsettings and for security reasons, they will only redirect to that url... Problem is.. I have localhost and 2 different domains. How can I make this work? Ofcourse I could edit the hostsfile, but that only fixes it for localhost.. Still no solution for the testdomain. Please tell me this is somehow possible! I'm getting more and more depressed with the Facebook API.

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• Post to a page wall that I'm not admin

  - by Jirico

  I created an app to post to pages the user chooses. How can I direct the message to a page Wall on behalf of the user? From my tests the post is sent, but the page can't see it and the page is not notified either. I have OAuth extended Permissions of publish_stream, what else do I need to my post not being invisible? I will try to clarify the problem in details: 1- I send a post to a Facebook page that is not mine, I'm just a normal user, via application that ask for publish_stream, read_stream permissions. 2- I verify the page logging as admin but no notification is delivered and I can't see the post on my Wall. 3-If I log as the sender user I can see the post on page Wall, it looks like the post is private and just the sender user can see It. If I try to recover the post via Graph API using the same user it returns false. 4- Only the users who has the app installed can see the post on page wall.

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• Moving FederatedEmail/SystemMailbox from One Store to Another - Exchange 2010

  - by ThaKidd

  Hello all. Just upgraded from Exchange 2003 to 2010. Somehow, I have two mailbox databases on my single Exchange 2010 server. One database contains all of the mailboxes I had moved from the 2003 exchange server; the other contains two SystemMailboxes and one FederatedEmail box. I am just starting to get a grasp on the commands used in the EMS. I was wondering if someone could point me in the right direction to move these three "system" mailboxes into my actual mailbox database so I can eliminate the second database. Just trying to sure up this one server before I role out my backup Exchange server. Thanks in advance! Your help and ideas are greatly appreciated as I try to make this setup as simple as possible.

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• alternatives to roboform

  - by ldigas

  Yes, I know there is already a few similar questions. Is there an alternative to RoboForm (which for some reason makes my FF very slow, because of some other extensions) which has the same way of working. What I mean, you click on ... and it opens a new tab with the page in question, and logs on to it (so no databases, and such ...). One other advantage would be if it kept passwords locally. Basically, I'm looking for RoboForm other than RoboForm. Anyone knows of any ?

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