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  • Writing more efficient xquery code (avoiding redundant iteration)

    - by Coquelicot
    Here's a simplified version of a problem I'm working on: I have a bunch of xml data that encodes information about people. Each person is uniquely identified by an 'id' attribute, but they may go by many names. For example, in one document, I might find <person id=1>Paul Mcartney</person> <person id=2>Ringo Starr</person> And in another I might find: <person id=1>Sir Paul McCartney</person> <person id=2>Richard Starkey</person> I want to use xquery to produce a new document that lists every name associated with a given id. i.e.: <person id=1> <name>Paul McCartney</name> <name>Sir Paul McCartney</name> <name>James Paul McCartney</name> </person> <person id=2> ... </person> The way I'm doing this now in xquery is something like this (pseudocode-esque): let $ids := distinct-terms( [all the id attributes on people] ) for $id in $ids return <person id={$id}> { for $unique-name in distinct-values ( for $name in ( [all names] ) where $name/@id=$id return $name ) return <name>{$unique-name}</name> } </person> The problem is that this is really slow. I imagine the bottleneck is the innermost loop, which executes once for every id (of which there are about 1200). I'm dealing with a fair bit of data (300 MB, spread over about 800 xml files), so even a single execution of the query in the inner loop takes about 12 seconds, which means that repeating it 1200 times will take about 4 hours (which might be optimistic - the process has been running for 3 hours so far). Not only is it slow, it's using a whole lot of virtual memory. I'm using Saxon, and I had to set java's maximum heap size to 10 GB (!) to avoid getting out of memory errors, and it's currently using 6 GB of physical memory. So here's how I'd really like to do this (in Pythonic pseudocode): persons = {} for id in ids: person[id] = set() for person in all_the_people_in_my_xml_document: persons[person.id].add(person.name) There, I just did it in linear time, with only one sweep of the xml document. Now, is there some way to do something similar in xquery? Surely if I can imagine it, a reasonable programming language should be able to do it (he said quixotically). The problem, I suppose, is that unlike Python, xquery doesn't (as far as I know) have anything like an associative array. Is there some clever way around this? Failing that, is there something better than xquery that I might use to accomplish my goal? Because really, the computational resources I'm throwing at this relatively simple problem are kind of ridiculous.

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  • Mac OS X Server Configure DHCP Options 66 and 67

    - by Paul Adams
    I need to configure Mountain Lion (10.8.2) OS X Server BOOTP to provide DHCP options 66 and 67 to provide PXE booting for PCs on my network. I have tried following the bootpd MAN pages, but they are not specific enough. I have also read conflicting information on the net, but nothing definitive for Mountain Lion DHCP. From bootpd man page: bootpd has a built-in type conversion table for many more options, mostly those specified in RFC 2132, and will try to convert from whatever type the option appears in the property list to the binary, packet format. For example, if bootpd knows that the type of the option is an IP address or list of IP addresses, it converts from the string form of the IP address to the binary, network byte order numeric value. If the type of the option is a numeric value, it converts from string, integer, or boolean, to the proper sized, network byte-order numeric value. Regardless of whether bootpd knows the type of the option or not, you can always specify the DHCP option using the data property list type <key>dhcp_option_128</key> <data> AAqV1Tzo </data> My TFTP server is 172.16.152.20 and the bootfile is pxelinux.0 I have edited /etc/bootpd.plist and added the following to the subnet dict: <key>dhcp_option_66</key> <data> LW4gLWUgrBCYFAo= </data> <key>dhcp_option_67</key> <data> LW4gLWUgcHhlbGludXguMAo= </data> According to the man page, the data elements are supposed to be Base64 encoded, but no matter what I try, I cannot get PXE clients to boot. I have tried encoding 172.16.152.20 using various methods: echo "172.16.152.20" | openssl enc -base64 returns MTcyLjE2LjE1Mi4yMAo= DHCP Option Code Utility (http://mac.softpedia.com/get/Internet-Utilities/DHCP-Option-Code-Utility.shtml) generating a string from 172.16.152.20 yields: LW4gLWUgMTcyLjE2LjE1Mi4yMAo= (used in the above example) DHCP Option Code Utility generating an IP Addresss from 172.16.152.20 yields: LW4gLWUgrBCYFAo= Encoding pxelinux.0 with the above methods likewise yields different encodings. I have tried using all three methods of encoding the data elements, but nothing seems to work i.e. my PXE boot clients do not get directed to my TFTP server. Can anyone help? Regards, Paul Adams.

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  • cakephp routing problem, plugin routing works but not others

    - by Paul
    I'm having a strange routing problem with a site I just uploaded, and I've made a number of changes to test what's happening. It doesn't make any sense. My setup is: - I'm using one plugin, which I've included all the routing in the routes.php file. - I've also included the routes for two other controllers, 'events' and 'updates' they look like this: Router::connect('/login', array('plugin' = 'pippoacl', 'controller' = 'users', 'action' = 'login')); Router::connect('/logout', array('plugin' = 'pippoacl', 'controller' = 'users', 'action' = 'logout')); Router::connect( '/events/', array( 'controller' = 'events', 'action' = 'index')); Router::connect('/updates', array('controller' = 'updates', 'action' = 'index')); What happens when I try to get to 'events' is that I get an error message saying: "Not Found Error: The requested address '/Events' was not found on this server." I've checked the database and it's accessible, through the plugin's model/controller/view. I've also made sure the model/controllers for 'events' and 'updates' are there. Can anyone tell me how to trouble shoot this? Thanks, Paul

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  • Symbol not found: _OBJC_CLASS_$_UIPopoverController

    - by Paul Peelen
    Hi, I am having problems with my universal app. I have set the Base SDK to iPhone 3.2 and set the target to 3.1. I have moved the files that are using the UIPopoverController to their own files and they shouldn't be loaded when loading the app on the iPhone. Still, when I build my app I get the following error when I build and debug to my device: dyld: Symbol not found: _OBJC_CLASS_$_UIPopoverController Referenced from: /var/mobile/Applications/B3B90643-92DC-4E5C-8B2F-83A42D6D57E0/citybikes.app/citybikes Expected in: /System/Library/Frameworks/UIKit.framework/UIKit in /var/mobile/Applications/B3B90643-92DC-4E5C-8B2F-83A42D6D57E0/citybikes.app/citybikes I really hope someone can help me. Best regards, Paul Peelen

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  • IMAP Idle Timeout

    - by Paul
    Lets say I am using IMAP IDLE to monitor changes in a mail folder. The IMAP spec says that IDLE connections should only stay alive for 30 minutes max, but it is recommended that a lower number of minutes is selected - say 20 minutes, then cancel the idle and restart. I am wondering what would happen if the mail contents changed between the idle canceling, and the new idle being created. An email could potentially be missed. Given that RECENT is a bit vague, this could lead to getting a message list before the old idle ends, and a new idle starts. But this is almost the same as polling every 20 minutes, and defeats some of the benefit of idle. Alternatively, a new idle session could be started prior to terminating the expiring one. But in any case, I think this problem has already been solved so here I am asking for recommendations. Thanks, Paul

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  • creating new usercontrols at runtime in ASP.NET MVC

    - by Paul Connolly
    Hi everyone, My situation is that the user is creating an entity on my site which contains the particlars of the driectors of that company, name address etc.. The Director form is a separate user control with the appropriate textboxes etc. At run time we don't know how many of these directors there will be so I need one to be able to use something like an "ADD DIRECTOR" or "DELETE DIRECTOR" button which will present or delete the another usercontrol to add the additional director. Currently I am trying to make this happen within a pane of the JQuery Accordion control. I have looked many places for how to do this but to no avail. Can anyone tell me where I might find some inforamation about how I can do this? All the best Paul

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  • POCO Best Practice

    - by Paul Johnson
    All, I have a series of domain objects (project is NHibernate based). Currently as per 'good practice' they define only the business objects, comprising properties and methods specific to each objects function within the domain. However one of the objects has a requirement to send an SMTP message. I have a simple SMTP client class defined in a separate 'Utilities' assembly. In order to use this mail client from within the POCO, I would need to hold a reference to the utilities assembly in the domain. My query is this... Is it a departure from best practice to hold such a reference in a POCO, for the purpose of gaining necessary business functionality. Kind Regards Paul J.

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  • What is the difference in WCF when using KnownType and ServiceKnownType?

    - by Paul Speranza
    I have a service that returns an array of animal but the list can contain cats, dogs, etc, which all extend animal. I know I need to use either the KnownType or ServiceKnownType attribute, and on the entity class or the service class, respectively. What is the difference between the 2 attributes? I prefer the ServiceKnownType because it is applied on the service, exactly where it is needed and called for, as opposed to KnownType which is applied on my entity. To me applying it on the entity class means knowing too far ahead how my entity class is being used. For now I have it on my entity and it works like a charm, but I am looking for guidance here as to best practices and usefullness. Thanks, Paul Speranza

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  • MapView Annotation Callout action when opened

    - by Paul Peelen
    Hi, I have a mapview with serveral annotations. Every annotation has a leftCalloutAccessoryView which is a UIViewController class. The reason for this is that I want every annotation to load some data from the server, and add the result of that data to the annotation subTitle. This all works perfectly, except that I dont want to load all that data when my app is started, but I want to the remote call to be done only when the callout bubble is opened. Does anybody know how I can do this? The viewWillload, viewDidLoad ect. don't work in this case. Any examples as well? Best regards, Paul Peelen

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  • WiX - Modifying an existing service to be dependent on the service I am installing

    - by Paul Nearney
    Hi all, Using Wix3, its trivial to ensure that a windows service being installed is given a dependency on a service that is already installed on the target machine, but I need to do the opposite - i.e. as part of my install I need to modify the service dependencies of an existing service (i.e. already installed on the target machine), to ensure that that service is dependent on the service I am installing. Is there a simple way to do this using WiX? or will I need to write a custom action? Many thanks, Paul

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  • ROO: how to create composit primary key in Entity

    - by Paul
    Hi, What can I do if I need to create entity for a table in production DB (Oracle 10g) with composite primary key. For example: [CODE] CREATE TABLE TACCOUNT ( BRANCHID NUMBER(3) NOT NULL, ACC VARCHAR2(18 BYTE) NOT NULL, DATE_OPEN DATE NOT NULL, DATE_CLOSE DATE, NOTE VARCHAR2(38 BYTE) ); CREATE UNIQUE INDEX PK_TACCOUNT ON TACCOUNT (BRANCHID, ACC); I don't want to change the structure of this table. Is it possible to create an "id" field using roo commands? I use Spring Roo 1.0.2.RELEASE [rev 638] Paul

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  • creating new usercntrols at runtime in ASP.NET MVC

    - by Paul Connolly
    Hi everyone, My situation is that the user is creating an entity on my site which contains the particlars of the driectors of that company, name address etc.. The Director form is a separate user control with the appropriate textboxes etc. At run time we don't know how many of these directors there will be so I need one to be able to use something like an "ADD DIRECTOR" or "DELETE DIRECTOR" button which will present or delete the another usercontrol to add the additional director. Currently I am trying to make this happen within a pane of the JQuery Accordion control. I have looked many places for how to do this but to no avail. Can anyone tell me where I might find some inforamation about how I can do this? All the best Paul

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  • J2me Blackberry Numeric Input

    - by Paul
    Hello, I am developing a blackberry application using j2me and LWUIT (blackberry port). Everything works great except for the TextField in numeric mode. Basically when you have focus on the TextField you have to first go into "NUMERIC" mode (by pressing alt + aA) in order to input, which is not user friendly and a problem. The proposed solution is to use a TextArea instead that allows you to open a NATIVE type input box. The problem there is that the user needs to focus the field and then press the fire button which again is unfriendly. Does anyone know of any simple solutions? The few solutions i have in mind (but not sure how to do them): 1) Capture any keypress on the TextArea and go into NATIVE mode, instead of just the fire key. 2) Put the blackberry input mode into numeric using code for the whole form. Any advice will be appreciated. Many Thanks, Paul

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  • Synchronising tables across remote Access databases

    - by Paul H
    Hi folks, I'm helping out a business by providing an Access DB to manage requests of various types. As they are a construction company, they have one machine in an 'office' on the building site, plus 3 based in their main office. The machine on site has no internet connectivity. Is there any (reasonably simple) way to synchronise these databases every so often? I realise the tables could be merged, but each has an autoincrement field which must be synced between instances (i.e. when merging two tables the autoincrement should be reassigned based on the combination of records). Cheers in advance, Paul

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  • phing and phpUnderControl ... working together

    - by Paul Hanssen
    Hi, Has anyone got these to work together seemlessly? I have tried, had some success using the plugin at http://phing.info/trac/wiki/Users/Documentation/CruiseControl, but have failed to: Get the metrics graphs working (nothing appears) Enable the "PMD" - project mess detection - reports Are there any other ant-specific commands that must (can) be run in addition to my phing build script? Also, the front page of the reports section dumps a heap of log information, and I'm trying to get rid of that too. Cheers for any help ... we are running phing 2.3.0 and phpUnderControl 0.4.7. Paul

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  • Convert From Custom List to List of String

    - by Paul Johnson
    Hi all I have the following code: Public Shared Function ConvertToString(ByVal list As IList) As String Dim strBuilder = New System.Text.StringBuilder() Dim item As Object For Each item In list strBuilder.Append(obj.ToString()) strBuilder.Append(",") Next Return strBuilder.ToString(strBuilder.Length - 1) End Function The intention is to convert an IList of custom objects to a string equivalent comprising each element in the Ilist. Unfortunately I can't seem to find a way to get the underlying data of the custom object, and of course as in the above example, using object simply gives me a string of types definitions, rather than access to the underlying data. Any assistance much appreciated. Paul.

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  • Redirecting from ASP.NET WebForms to MVC

    - by Paul Gordon
    Hi there, We have a large existing ASP.NET WebForms application, but we are now moving over to MVC. Rather than go through a painful process of trying to integrate MVC into the existing app, we're looking at creating a brand new VS project to completely isolate the new code. As a first step, we are wanting to use the existing login process of the WebForms app, then redirect over to the MVC app. Does anyone know of an easy way to do this (i.e. redirect from a WebForms project to the MVC project, in the same VS solution)? All the information I've found so far suggests either starting from scratch in MVC, or combing MVC into the existing Webforms project - neither of which is very feasible. Many thanks, Paul

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  • umount bind of stale NFS

    - by Paul Eisner
    i've got a problem removing mounts created with mount -o bind from a locally mounted NFS folder. Assume the following mount structure: NFS mounted directory: $ mount -o rw,soft,tcp,intr,timeo=10,retrans=2,retry=1 \ 10.20.0.1:/srv/source /srv/nfs-source Bound directory: $ mount -o bind /srv/nfs-source/sub1 /srv/bind-target/sub1 Which results in this mount map $ mount /dev/sda1 on / type ext3 (rw,errors=remount-ro) # ... 10.20.0.1:/srv/source on /srv/nfs-source type nfs (rw,soft,tcp,intr,timeo=10,retrans=2,retry=1,addr=10.20.0.100) /srv/nfs-source/sub1 on /srv/bind-target/sub1 type none (rw,bind) If the server (10.20.0.1) goes down (eg ifdown eth0), the handles become stale, which is expected. I can now un-mount the NFS mount with force $ umount -f /srv/nfs-source This takes some seconds, but works without any problems. However, i cannot un-mount the bound directory in /srv/bind-target/sub1. The forced umount results in: $ umount -f /srv/bind-target/sub1 umount2: Stale NFS file handle umount: /srv/bind-target/sub1: Stale NFS file handle umount2: Stale NFS file handle Here is a trace http://pastebin.com/ipvvrVmB I've tried umounting the sub-directories beforehand, find any processes accessing anything within the NFS or bind mounts (there are none). lsof also complains: $ lsof -n lsof: WARNING: can't stat() nfs file system /srv/nfs-source Output information may be incomplete. lsof: WARNING: can't stat() nfs file system /srv/bind-target/sub1 (deleted) Output information may be incomplete. lsof: WARNING: can't stat() nfs file system /srv/bind-target/ Output information may be incomplete. I've tried with recent stable Linux kernels 3.2.17, 3.2.19 and 3.3.8 (cannot use 3.4.x, cause need the grsecurity patch, which is not, yet, supported - grsecurity is not patched in in the tests above!). My nfs-utils are version 1.2.2 (debian stable). Does anybody have an idea how i can either: force the un-mount some other way? (any dirty trick is welcome, data loss or damage neglible at this point) use something else instead of mount -o bind? (cannot use soft links, cause mounted directories will be used in chroot; bindfs via FUSE is far to slow to be an option) Thanks, Paul Update 1 With 2.6.32.59 the umount of the (stale) sub-mounts work just fine. It seems to be a kernel regression bug. The above tests where with NFSv3. Additional tests with NFSv4 showed no change. Update 2 We have tested now multiple 2.6 and 3.x kernels and are now sure, that this was introduced in 3.0.x. We will fille a bug report, hopefully they figure it out.

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  • TypeInitializationException When Getting an NHibernate Session

    - by Paul Johnson
    I’ve run into what appears to be an NHibernate config problem. Basically, I ran up a simple proof of concept persistence integration test using NUnit, the test simply querys an Oracle database and successfully returns the last record received by the underlying table. However, when the assemblies are taken out of the NUnit test environment and deployed as they would be for an actual application build, my call for an NHibernate session results in a ‘TypeInitializationException’ whilst executing the code line: sessionFactory = New Configuration().Configure().BuildSessionFactory() The application is a vb.net console app running against an Oracle 9.2 database, using a ‘coding framework’ published on the web by Bill McCafferty entitled 'NHibernate Best Practices with ASP.NET' (pre S#harp Architecture). I am running version 2.1.2.4000 of NHibernate. Any assistance much appreciated. Kind Regards Paul J.

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  • How to launch the market intent in 'Give Feedback' mode on android.

    - by Paul Maidment
    Hi There, I have just written a game for the Android market and would like to remind my customers to leave feeback on the market for the application (especially the demo version.) Is there any way to launch the market intent in a mode that will take the user to the feedback / comments section of the page? I already use this approach for linking my demo to the paid app... Intent goToMarket = null; goToMarket = new Intent(Intent.ACTION_VIEW,Uri.parse("market://details?id=com.paulmaidment.games.flagsoftheworld")); startActivity(goToMarket); Is there a best practice that any Android devs out there might know of? Additionally, is there any way to track referalls from my demo app so that I can try to calculate some kind of a conversion rate? (i.e. how effective the demo app is at generating sales.) Thanks, Paul

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  • Calculation route length

    - by Paul Peelen
    Hi, I have a map with about 80 annotations. I would like to do 3 things. 1) From my current location, I would like to know the actual route distance to that position. Not the linear distance. 2) I want to be able to show a list of all the annotations, but for every annotation (having lon/lat) I would like to know the actual route distance from my position to that position. 3) I would like to know the closest annotation to my possition using route distance. Not linear distance. I think the answer to all these three points will be the same. But please keep in mind that I don't want to create a route, I just want to know the distance to the annotation. I hope someone can help me. Best regards, Paul Peelen

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  • how to: re-assemble machine generated classes from xsd files to their original nested state.

    - by Paul Connolly
    Hi everyone, I'm working in Visual Studio 2008 using c#. Let's say I have 2 xsd files e.g "Envelope.xsd" and "Body.xsd" I create 2 sets of classes by running xsd.exe, creating something like "Envelope.cs" and "Body.cs", so far so good. I can't figure out how to link the two classes to serialize (using XmlSerializer) into the proper nested xml, i.e: I want: <Envelope><DocumentTitle>Title</DocumentTitle><Body>Body Info</Body></Envelope> But I get: <Envelope><DocumentTitle>Title</DocumentTitle></Envelope><Body>Body Info</Body> Could someone perhaps show me how the two .cs classes should look to enable XmlSerializer to runt the desired nested result? Thanks a million Paul

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  • OnPage Load display one sentence - hide others

    - by Paul
    Hi I have created http://techavid.com/design/test3.html and when you load the page you see there are 3 images. The sun image is focused(in color), while the others are greyed out until clicked. That is how it should be for the images. Under each image you see a sentence 1st: Sun, 2nd: Airplane & 3rd: Nano, but when page loads you see all three sentences. How to make it so when page loads the first sentence underneath the active image (sun) shows only and the others do not show, they only show when clicked (though that works just need to figure out onpage load only show "1st: Sun")? thanks :) paul J.

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