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  • Porting Oracle Procedure to PostgreSQL

    - by Grasper
    I am porting an Oracle function into Postgres PGPLSQL.. I have been using this guide: http://www.postgresql.org/docs/8.1/static/plpgsql.html CREATE OR REPLACE PROCEDURE DATA_UPDATE (mission NUMBER, task NUMBER) AS BEGIN IF mission IS NOT NULL THEN UPDATE MISSION_OBJECTIVE MO SET (MO.MO_TKR_TOTAL_OFF_SCHEDULED, MO.MO_TKR_TOTAL_RECEIVERS) = (SELECT NVL(SUM(RR.TRQ_FUEL_OFFLOAD),0), NVL(SUM(RR.TRQ_NUMBER_RECEIVERS),0) FROM REFUELING_REQUEST RR, MISSION_REQUEST_PAIRING MRP WHERE MO.MSN_INT_ID = MRP.MSN_INT_ID AND MO.MO_INT_ID = MRP.MO_INT_ID AND MRP.REQ_INT_ID = RR.REQ_INT_ID) WHERE MO.MSN_INT_ID = mission AND MO.MO_INT_ID = task ; END IF ; COMMIT ; END ; I've got it this far: CREATE OR REPLACE FUNCTION DATA_UPDATE (NUMERIC, NUMERIC) RETURNS integer as ' DECLARE mission ALIAS for $1; task ALIAS for $2; BEGIN IF mission IS NOT NULL THEN UPDATE MISSION_OBJECTIVE MO SET (MO.MO_TKR_TOTAL_OFF_SCHEDULED, MO.MO_TKR_TOTAL_RECEIVERS) = (SELECT COALESCE(SUM(RR.TRQ_FUEL_OFFLOAD),0), COALESCE(SUM(RR.TRQ_NUMBER_RECEIVERS),0) FROM REFUELING_REQUEST RR, MISSION_REQUEST_PAIRING MRP WHERE MO.MSN_INT_ID = MRP.MSN_INT_ID AND MO.MO_INT_ID = MRP.MO_INT_ID AND MRP.REQ_INT_ID = RR.REQ_INT_ID) WHERE MO.MSN_INT_ID = mission AND MO.MO_INT_ID = task ; END IF; COMMIT; END; ' LANGUAGE plpgsql; This is the error I get: ERROR: syntax error at or near "SELECT" LINE 1: ...OTAL_OFF_SCHEDULED, MO.MO_TKR_TOTAL_RECEIVERS) = (SELECT COA... I do not know why this isn't working... any ideas?

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  • RTF template coding, XSLT coding

    - by sujith
    I have the below requirement <data> <dataset1> <number>1</number> <name>red</name> <number>2</number> <name>Yellow</name> <number>3</number> <name>black</name> <number>4</number> <name>Violet</name> </dataset1> <dataset2> <index>1</index> <index>2</index> <index>3</index> <index>4</index> </dataset2> </data> I need to loop through dataset2 take the index value, compare it with the value of number tag in dataset1. If a match occurs then display value of corresponding name tag. I need to get the output in rtf format. Please give BI tags or relevent xslt code to do the same. Thanks in advance.

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  • WCF - remote service without using IIS - base address?

    - by Mark Pim
    I'm trying to get my head around the addressing of WCF services. We have a client-server setup where the server occasionally (maybe once a day) needs to push data to each client. I want to have a lightweight WCF listener service on each client hosted in an NT service to receive that data. We already have such an NT service setup hosting some local WCF services for other tasks so the overhead of this is minimal. Because of existing legacy code on the server I believe the service needs to be exposed as ASMX and use basicHttpBinding to allow it to connect. Each client is registered on the server by the user (they need to configure them individually) so discovery is not the issue. My question is, how does the addressing work? I imagine the user entering the client's address on the server in the form http://0.0.0.0/MyService or even http://hostname/MyService If so, how do I configure the client service in its App.config? Do I use localhost? If not then what is the reccommended way of exposing the service to the server? Note: I don't want to host in IIS as that adds extra requirements to the hardware required for the client. The clients will be almost certainly located on LANs, not over the public internet

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  • TLS with SNI in Java clients

    - by ftrotter
    There is an ongoing discussion on the security and trust working group for NHIN Direct regarding the IP-to-domain mapping problem that is created with traditional SSL. If an HISP (as defined by NHIN Direct) wants to host thousands of NHIN Direct "Health Domains" for providers, then it will an "artificially inflated cost" to have to purchase an IP for each of those domains. Because Apache and OpenSSL have recently released TLS with support for the SNI extension, it is possible to use SNI as a solution to this problem on the server side. However, if we decide that we will allow server implementations of the NHINDirect transport layer to support TLS+SNI, then we must require that all clients support SNI too. OpenSSL based clients should do this by default and one could always us stunnel to implement an TLS+SNI aware client to proxy if your given programming language SSL implementation does not support SNI. It appears that native Java applications using OpenJDK do not yet support SNI, but I cannot get a straight answer out of that project. I know that there are OpenSSL Java libraries available but I have no idea if that would be considered viable. Can you give me a "state of the art" summary of where TLS+SNI support is for Java clients? I need a Java implementers perspective on this.

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  • Heroku taps push weirdness...

    - by holden
    I have the strangest experience using taps to move data between my machine and heroku. It works fine except that it seems to loose 0s directly behind the decimal place for my geo coordinates. Ie 50.0519322 for some reason gets set to 50.519322... no idea why. When I pull the data from the remote location ie. heroku db:pull... it works fine, all decimal places intact on my machine, however, when i push it back to the remote server it loses these zeros. Especially directly behind the decimal place, though I haven't noticed it elsewhere yet. At first I was storing the lat and lng as simply numeric but refined it to: change_column :places, :lat, :numeric, :precision => 15, :scale => 10 change_column :places, :lng, :numeric, :precision => 15, :scale => 10 With no result, any ideas what's going on? From the console on the remote server i get the lat as being: #<BigDecimal:2aebcc5967c0,'0.50519322E2',18(18)> and my machine as: #<BigDecimal:10232f7c8,'0.50519322E2',12(16)> which is also odd, the second one because it shows up as 50.0519322 when i edit it thru my view but when i do to_f via console it gives me 50.519322

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  • IRequest / IResponse Pattern

    - by traderde
    I am trying to create an Interface-based Request/Response pattern for Web API requests to allow for asynchronous consumer/producer processing, but not sure how I would know what the underlying IResponse class is. public void Run() { List<IRequest> requests = new List<IRequest>(); List<IResponse> responses = new List<IResponse(); requests.Add(AmazonWebRequest); //should be object, trying to keep it simple requests.Add(EBayWebRequest); //should be object, trying to keep it simple foreach (IRequest req in requests) { responses.Add(req.GetResponse()); } foreach (IResponse resp in response) { typeof resp???? } } interface IRequest { IResponse GetResponse(); } interface IResponse { } public class AmazonWebServiceRequest : IRequest { public AmazonWebServiceRequest() { //get data; } public IResponse GetResponse() { AmazonWebServiceRequest request = new AmazonWebServiceRequest(); return (IResponse)request; } } public class AmazonWebServiceResponse : IResponse { XmlDocument _xml; public AmazonWebServiceResponse(XmlDocument xml) { _xml = xml; _parseXml(); } private void _parseXml() { //parse Xml into object; } } public class EBayWebRequest : IRequest { public EBayWebRequest () { //get data; } public IResponse GetResponse() { EBayWebRequest request = new EBayWebRequest(); return (IResponse)request; } } public class EBayWebResponse : IResponse { XmlDocument _xml; public EBayWebResponse(XmlDocument xml) { _xml = xml; _parseXml(); } private void _parseXml() { //parse Xml into object; } }

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  • Appengine datastore phantom entity - inconsistent state?

    - by aloo
    Getting a weird error on java appengine code that used to work fine (nothing has changed but the data in the datastore). I'm trying to iterate over the results of a query and change a few properties of the entities. The query does return a set of results, however, when I try to access the first result in the list, it throws an exception when trying to access any of its properties (but its key). Here's the exception: org.datanucleus.state.JDOStateManagerImpl isLoaded: Exception thrown by StateManager.isLoaded Could not retrieve entity of kind OnTheCan with key OnTheCan(3204258) org.datanucleus.exceptions.NucleusObjectNotFoundException: Could not retrieve entity of kind OnTheCan with key OnTheCan(3204258) at org.datanucleus.store.appengine.DatastoreExceptionTranslator.wrapEntityNotFoundException(DatastoreExceptionTranslator.java:60) And here is my code: PersistenceManager pm = PMF.get().getPersistenceManager(); Query query = null; List<OnTheCan> cans; query = pm.newQuery("SELECT this FROM " + OnTheCan.class.getName() + " WHERE open == true ORDER BY onTheCanId ASC"); query.setRange(0, num); cans = (List<OnTheCan>) query.execute(); for (OnTheCan c : cans) { System.err.println(c.getOnTheCanId()); // this works fine! getting the key works c.setOpen(false); // failure here with the above exception c.setAutoClosed(true); c.setEndTime(new Date(c.getStartTime().getTime() + 600000/*10*60*1000*/)); } pm.close(); The code throws the exception when trying to execute c.setOpen(false) - thats the first time I'm accessing or setting a property that isnt the key. So it seems there is a phantom entity in my datastore with key 3204258. THis entity doesn't really exist (queried the datastore from admin console) but for some reason its being returned by the query. Could my data store be in an inconsistent state? I've managed the following workaround by placing it as the first line in my for loop. Clearly an ugly hack: if (c.getOnTheCanId() == 3204258) { continue; } Any ideas?

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  • .htaccess equivalent of baseurl?

    - by Ryan
    Hello, I'm trying to install Symfony on a shared server and am attempting to duplicate the httpd.conf command: # Be sure to only have this line once in your configuration NameVirtualHost 127.0.0.1:8080 # This is the configuration for your project Listen 127.0.0.1:8080 <VirtualHost 127.0.0.1:8080> DocumentRoot "/home/sfproject/web" DirectoryIndex index.php <Directory "/home/sfproject/web"> AllowOverride All Allow from All </Directory> Alias /sf /home/sfproject/lib/vendor/symfony/data/web/sf <Directory "/home/sfproject/lib/vendor/symfony/data/web/sf"> AllowOverride All Allow from All </Directory> </VirtualHost> I need to do so using .htaccess The redirect portion was done in the root using the following: Options +FollowSymlinks RewriteEngine on rewritecond %{http_host} ^symfony.mysite.ca [nc] rewriterule ^(.*)$ http://symfony.mysite.ca/web/$1 [r=301,nc] For the alias, I've tried using: RewriteBase / but no success. The main issue is that the index.php file residing in the /web folder uses the /web path in its path to images and scripts. So instead of href="/css/main.css" //this would work it uses href="/web/css/main.css" //this doesn't work, already in the /web/ directory! Any ideas? Thanks!

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  • Implementing the ‘defer’ statement from Go in Objective-C?

    - by zoul
    Hello! Today I read about the defer statement in the Go language: A defer statement pushes a function call onto a list. The list of saved calls is executed after the surrounding function returns. Defer is commonly used to simplify functions that perform various clean-up actions. I thought it would be fun to implement something like this in Objective-C. Do you have some idea how to do it? I thought about dispatch finalizers, autoreleased objects and C++ destructors. Autoreleased objects: @interface Defer : NSObject {} + (id) withCode: (dispatch_block_t) block; @end @implementation Defer - (void) dealloc { block(); [super dealloc]; } @end #define defer(__x) [Defer withCode:^{__x}] - (void) function { defer(NSLog(@"Done")); … } Autoreleased objects seem like the only solution that would last at least to the end of the function, as the other solutions would trigger when the current scope ends. On the other hand they could stay in the memory much longer, which would be asking for trouble. Dispatch finalizers were my first thought, because blocks live on the stack and therefore I could easily make something execute when the stack unrolls. But after a peek in the documentation it doesn’t look like I can attach a simple “destructor” function to a block, can I? C++ destructors are about the same thing, I would create a stack-based object with a block to be executed when the destructor runs. This would have the ugly disadvantage of turning the plain .m files into Objective-C++? I don’t really think about using this stuff in production, I’m just interested in various solutions. Can you come up with something working, without obvious disadvantages? Both scope-based and function-based solutions would be interesting.

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  • Workflow engine BPMN, Drools, etc or ESB?

    - by Tom
    We currently have an application that is based on an in-house developed workflow engine with YAML based DSL. We are looking to move parts of it to Java. I have discovered a number of java solutions like Intalio, JBPM, Drools Expert, Drools Flow etc. They appear to be aimed at businesses where the business analyst creates the workflows using a graphical editor and submits them to the workflow engine. They seem geared towards ease of use for non-technical people rather than for developers with a focus on human interaction. The workflows tend to look like. Discover-a-file -\ -> join -> process-file -> move-file -> register-file Discover-some-metadata -/ If any step fails we need to retry it X times. We also need to be able to stop the system and be able to restart it and have it continue from where it was (durable). Some of our workflows can be defined by a set of goals we need to achieve so Jess's backwards rule chaining sounds interesting but it is not open source. It might be that what we are after is a Finite State Machine engine or just an Enterprise Service Bus and do everything as JMS queues. Is there a good open source workflow engine that is both standards-based but also geared towards developers. We don't particular want to use a graphical workflow designer or write reams of XML and it should ideally be in Java or language agnostic (makes REST/Soap calls to external services). Thanks, Tom

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  • Reporting System architecture for better performance

    - by pauloya
    Hi, We have a product that runs Sql Server Express 2005 and uses mainly ASP.NET. The database has around 200 tables, with a few (4 or 5) that can grow from 300 to 5000 rows per day and keep a history of 5 years, so they can grow to have 10 million rows. We have built a reporting platform, that allows customers to build reports based on templates, fields and filters. We face performance problems almost since the beginning, we try to keep reports display under 10 seconds but some of them go up to 25 seconds (specially on those customers with long history). We keep checking indexes and trying to improve the queries but we get the feeling that there's only so much we can do. Off course the fact that the queries are generated dynamically doesn't help with the optimization. We also added a few tables that keep redundant data, but then we have the added problem of maintaining this data up to date, and also Sql Express has a limit on the size of databases. We are now facing a point where we have to decide if we want to give up real time reports, or maybe cut the history to be able to have better performance. I would like to ask what is the recommended approach for this kind of systems. Also, should we start looking for third party tools/platforms? I know OLAP can be an option but can we make it work on Sql Server Express, or at least with a license that is cheap enough to distribute to thousands of deployments? Thanks

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  • How does one properly redefine self while avoiding the "Multiple methods named ..." warning?

    - by Elise van Looij
    In Apple's The Objective-C Programming Language: Defining a Class the section named "Redifining self" recommends that that class methods allocate and return instances use 'self' only to allocate an instance and then refer only to that instance. Thus, I have a number of subclasses, that have class methods along the lines of: + (id)scrollViewWithFrame: (NSRect)rectFrame { id newInstance = [[[self alloc] initWithFrame:rectFrame] autorelease]; [newInstance setHasHorizontalScroller: YES]; [newInstance setHasVerticalScroller: YES]; [newInstance setBorderType: NSNoBorder]; [newInstance setAutoresizingMask: (NSViewWidthSizable | NSViewHeightSizable)]; return newInstance; } The above is, of course, a subclass of NSScrollView. Unfortunately, Xcode 3.x all these NSView subclasses now raise warnings: "Warning: Multiple methods named '-setAutoresizingMask' found". I believe it has something to do with GCC 4.2, the settings of which I have not changed. The warning is correct, of course, since NSView and its various subclasses all implement setAutoresizingMask, but it is also unnecessary. Since they're only warnings, I ignore them but there is a risk that in between the thirty or so unnecessary ones, a really useful warning lurks which I simply don't see. So, what to do? I do want to adhere to good coding practices and I want to build warning-free apps -- how can I do both?

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  • refactor LINQ TO SQL custom properties that instantiate datacontext

    - by Thiago Silva
    I am working on an existing ASP.NET MVC app that started small and has grown with time to require a good re-architecture and refactoring. One thing that I am struggling with is that we've got partial classes of the L2S entities so we could add some extra properties, but these props create a new data context and query the DB for a subset of data. This would be the equivalent to doing the following in SQL, which is not a very good way to write this query as oppsed to joins: SELECT tbl1.stuff, (SELECT nestedValue FROM tbl2 WHERE tbl2.Foo = tbl1.Bar), tbl1.moreStuff FROM tbl1 so in short here's what we've got in some of our partial entity classes: public partial class Ticket { public StatusUpdate LastStatusUpdate { get { //this static method call returns a new DataContext but needs to be refactored var ctx = OurDataContext.GetContext(); var su = Compiled_Query_GetLastUpdate(ctx, this.TicketId); return su; } } } We've got some functions that create a compiled query, but the issue is that we also have some DataLoadOptions defined in the DataContext, and because we instantiate a new datacontext for getting these nested property, we get an exception "Compiled Queries across DataContexts with different LoadOptions not supported" . The first DataContext is coming from a DataContextFactory that we implemented with the refactorings, but this second one is just hanging off the entity property getter. We're implementing the Repository pattern in the refactoring process, so we must stop doing stuff like the above. Does anyone know of a good way to address this issue?

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  • Flex - Drag and drop - Drop a subset of multiple items

    - by flanagann
    I'm developing two DataGrid with drag and drop support. Multiple items can be selected from the source data grid, and dropped into the target data grid. I'm using an drag and drop event listener which completes the operation only in certain cases. I'm using event.preventDefault() but it doesn't work, since it stops the drag and drop from all the items. My aim is, for example, finally dropping 2 elements from the total 4 elements that I previously selected. public function onDropPermission(event:DragEvent):void { var sourceGrid:mx.controls.DataGrid = new mx.controls.DataGrid(); sourceGrid = event.dragInitiator as mx.controls.DataGrid; var targetGrid:mx.controls.DataGrid = new mx.controls.DataGrid(); targetGrid = event.target as mx.controls.DataGrid; var i:int; for (i = 0; i < sourceGrid.selectedIndices.length; i++) { var j:int; for (j = 0; j < dataGroupPermissions.length; j++) { var permission:Permission = new Permission; permission = dataGroupPermissions[j] as Permission; if (permission.id == sourceGrid.selectedItems[i].id) { event.preventDefault(); } } } }

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  • jQuery Ajax / .each callback, next 'each' firing before ajax completed

    - by StuR
    Hi the below Javascript is called when I submit a form. It first splits a bunch of url's from a text area, it then: 1) Adds lines to a table for each url, and in the last column (the 'status' column) it says "Not Started". 2) Again it loops through each url, first off it makes an ajax call to check on the status (status.php) which will return a percentage from 0 - 100. 3) In the same loop it kicks off the actual process via ajax (process.php), when the process has completed (bearing in the mind the continuous status updates), it will then say "Completed" in the status column and exit the auto_refresh. 4) It should then go to the next 'each' and do the same for the next url. function formSubmit(){ var lines = $('#urls').val().split('\n'); $.each(lines, function(key, value) { $('#dlTable tr:last').after('<tr><td>'+value+'</td><td>Not Started</td></tr>'); }); $.each(lines, function(key, value) { var auto_refresh = setInterval( function () { $.ajax({ url: 'status.php', success: function(data) { $('#dlTable').find("tr").eq(key+1).children().last().replaceWith("<td>"+data+"</td>"); } }); }, 1000); $.ajax({ url: 'process.php?id='+value, success: function(msg) { clearInterval(auto_refresh); $('#dlTable').find("tr").eq(key+1).children().last().replaceWith("<td>completed rip</td>"); } }); }); }

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  • MacBook Pro - Aquamacs - spell check

    - by peggy Li
    I have tried to use spell check for aquamac. I highlighted a region of the text. Then clicked Edit, then spell check region. I got the error message: Error : No word lists can be found for the language "en_US". Then I went to the website to download the following dictionaries: CocoAspell : I just clicked the download button. It was reported that the download was successful. However, when I tested it and highlighted a text region and clicked spell check. The same error message came out. Do I need to pull the downloaded .pkg to a certain place, such as the application folder, before I opened the .pkg? Or what else do I need to do make it work? I also downloaded the base package Aspell (for Intel) and the pre-built dictionaries as (as the instruction of the website), just the same way as point 1. I still got the same error message. Again, Do I need to pull the downloaded .pkg to a certain place, such as the application folder, before I opened the .pkg? Or what else do I need to do make it work? I would be greatly appreciated if someone could give me some help? Peggy Li

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  • echo command not found while testing selenium with phpunit

    - by Bill Szerdy
    I am getting an ERROR: Unknown command: 'echo' executing a selenium script with phpunit. Based on the output that echo command should be included in my version of PHPUnit. The selenium script does execute successfully in the firefox selenium IDE. mkdir_build: phpunit: [exec] PHPUnit 3.4.12 by Sebastian Bergmann. [exec] [exec] . [exec] TestFull [exec] E [exec] [exec] Time: 11 seconds, Memory: 6.50Mb [exec] [exec] There was 1 error: [exec] [exec] 1) TestFull::testNumberOne [exec] PHPUnit_Framework_Exception: Response from Selenium RC server for testComplete(). [exec] ERROR: Unknown command: 'echo'. [exec] [exec] [exec] /directory/to/tests/TestFull.php:14 [exec] [exec] FAILURES! [exec] Tests: 1, Assertions: 0, Errors: 1. And the RC server output: $ java -jar selenium-server.jar -port 4445 -debug 13:23:08.426 INFO - Java: Sun Microsystems Inc. 14.2-b01 13:23:08.428 INFO - OS: Linux 2.6.28-15-server i386 13:23:08.439 INFO - v2.0 [a2], with Core v2.0 [a2] 13:23:08.439 INFO - Selenium server running in debug mode. 13:25:05.661 DEBUG - ---------retrieving CommandQueue for sel_93352 13:25:05.662 DEBUG - Browser 2c8b3b5657a640db9fb278ecbd01049e/:top sel_93352 posted ERROR: Unknown command: 'echo' 13:25:05.662 DEBUG - ---------retrieving CommandQueue for sel_93352 13:25:05.662 DEBUG - putting command: ERROR: Unknown command: 'echo' 13:25:05.662 DEBUG - ..command put?: true 13:25:05.662 DEBUG - sel_93352 commandHolder sel_93352 getCommand() called 13:25:05.662 DEBUG - waiting for data for at most 10 more s 13:25:05.662 DEBUG - data from polling: ERROR: Unknown command: 'echo' 13:25:05.662 DEBUG - sel_93352 commandResultHolder sel_93352 getResult() -> ERROR: Unknown command: 'echo' 13:25:05.663 DEBUG - Got result: ERROR: Unknown command: 'echo' on session 2c8b3b5657a640db9fb278ecbd01049e 13:25:05.663 INFO - Got result: ERROR: Unknown command: 'echo' on session 2c8b3b5657a640db9fb278ecbd01049e 13:25:05.663 DEBUG - Handled by org.openqa.selenium.server.SeleniumDriverResourceHandler in HttpContext[/selenium-server,/selenium-server] 13:25:05.663 DEBUG - RESPONSE: HTTP/1.1 200 OK Date: Wed, 07 Apr 2010 20:25:05 GMT Server: Jetty/5.1.x (Linux/2.6.28-15-server i386 java/1.6.0_16 Cache-Control: no-cache Pragma: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Content-Type: text/plain Connection: close

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  • postgresql error - ERROR: input is out of range

    - by CaffeineIV
    The function below keeps returning this error message. I thought that maybe the double_precision field type was what was causing this, and I tried to use CAST, but either that's not it, or I didn't do it right... Help? Here's the error: ERROR: input is out of range CONTEXT: PL/pgSQL function "calculate_distance" line 7 at RETURN ********** Error ********** ERROR: input is out of range SQL state: 22003 Context: PL/pgSQL function "calculate_distance" line 7 at RETURN And here's the function: CREATE OR REPLACE FUNCTION calculate_distance(character varying, double precision, double precision, double precision, double precision) RETURNS double precision AS $BODY$ DECLARE earth_radius double precision; BEGIN earth_radius := 3959.0; RETURN earth_radius * acos(sin($2 / 57.2958) * sin($4 / 57.2958) + cos($2/ 57.2958) * cos($4 / 57.2958) * cos(($5 / 57.2958) - ($3 / 57.2958))); END; $BODY$ LANGUAGE 'plpgsql' VOLATILE COST 100; ALTER FUNCTION calculate_distance(character varying, double precision, double precision, double precision, double precision) OWNER TO postgres; //I tried changing (unsuccessfully) that RETURN line to: RETURN CAST( (earth_radius * acos(sin($2 / 57.2958) * sin($4 / 57.2958) + cos($2/ 57.2958) * cos($4 / 57.2958) * cos(($5 / 57.2958) - ($3 / 57.2958))) ) AS text);

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  • PostgreSQL: Rolling back a transaction within a plpgsql function?

    - by jamieb
    Coming from the MS SQL world, I tend to make heavy use of stored procedures. I'm currently writing an application uses a lot of PostgreSQL plpgsql functions. What I'd like to do is rollback all INSERTS/UPDATES contained within a particular function if I get an exception at any point within it. I was originally under the impression that each function is wrapped in it's own transaction and that an exception would automatically rollback everything. However, that doesn't seem to be the case. I'm wondering if I ought to be using savepoints in combination with exception handling instead? But I don't really understand the difference between a transaction and a savepoint to know if this is the best approach. Any advice please? CREATE OR REPLACE FUNCTION do_something( _an_input_var int ) RETURNS bool AS $$ DECLARE _a_variable int; BEGIN INSERT INTO tableA (col1, col2, col3) VALUES (0, 1, 2); INSERT INTO tableB (col1, col2, col3); VALUES (0, 1, 'whoops! not an integer'); -- The exception will cause the function to bomb, but the values -- inserted into "tableA" are not rolled back. RETURN True; END; $$ LANGUAGE plpgsql;

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  • Scheme Infix to Postfix

    - by Cody
    Let me establish that this is part of a class assignment, so I'm definitely not looking for a complete code answer. Essentially we need to write a converter in Scheme that takes a list representing a mathematical equation in infix format and then output a list with the equation in postfix format. We've been provided with the algorithm to do so, simple enough. The issue is that there is a restriction against using any of the available imperative language features. I can't figure out how to do this in a purely functional manner. This is our fist introduction to functional programming in my program. I know I'm going to be using recursion to iterate over the list of items in the infix expression like such. (define (itp ifExpr) ( ; do some processing using cond statement (itp (cdr ifExpr)) )) I have all of the processing implemented (at least as best I can without knowing how to do the rest) but the algorithm I'm using to implement this requires that operators be pushed onto a stack and used later. My question is how do I implement a stack in this function that is available to all of the recursive calls as well?

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  • drupal ajax create node

    - by Mark
    I need to create a drupal node via ajax. I'm looking for some instructions as in: http://stackoverflow.com/questions/960343/creating-a-drupal-node-with-javascript But with more detail, and including the js steps. The JS will probably look something like this: var title = 'Demo Node Title' $('button').click(function () { $.post('demo/js', {"title" : title}, function(data) { var json = eval("(" + data + ")"); if (json['status'] == "error") { alert(json['message']); } else if (json['status'] == "success") { alert(json['message']); // Need to return the nid of the new node here. Anyone know how to do this? } }); }); The PHP (copied from the other question, but I don't understand it much, how do I set the title of the node? also as the comments says, how do I set an input filter?): <?php /** * Implementation of hook_menu(). */ function demo_menu() { $items = array(); $items['demo/js'] = array( 'title' => 'Demo page', 'page callback' => 'demo_js_page', 'access callback' => TRUE, 'type' => MENU_CALLBACK, ); return $items; } /** * Page callback that saves a node. */ function demo_js_page() { if (isset($_REQUEST['title'])) { $node = new stdClass; $node->type = 'blog'; $node->title = check_plain($_REQUEST['title']); node_save($node); drupal_set_message(t('Created node %title', array('%title' => $_REQUEST['title']))); } return t('Thanks for visiting'); } Thanks in advance.

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  • jquery wait till large document is loaded

    - by Martijn
    In my web application I call a document can be huge. This document is loaded into an iframe. I have a title, buttons and the text which all depends on this document. The text is from the large document and is displayed in the iframe. I'd like to show an animated gif while the document is loading on 3 places (1: document title, 2: document buttons, 3: document text, the iframe) I've tried the onload event on the Iframe, but this doesn't give the me the desired effect. Here's my code that loads the document: function loadDocument(id, doc) { $("#DocumentContent").show(); $("#ButtonBox").show(); // Clear dynamic menu items $("#DynamicMenuContent").html(""); $("#PageContent").html(""); // Load document in frame $("#iframeDocument").attr("src", 'ViewDoc.aspx?id=' + id + '&doc=' + doc + ''); // $("#iframeDocument").attr("src", "Graphics/loader.gif"); // Load menu items $.ajax({ url: "ShowButtons.aspx?id=" + id + "&doc=" + doc, success: function(data) { $("#DynamicMenuContent").html(data) }, error: function(xhr, err, e) { alert("error: " + err) } }); // Set document title $("#documentTitle").load("GetDocumentInfo.aspx?p=title"); } My questions, how can I display a loader gif while the document is loaded? And remove the gif when the document is ready?

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  • Passing a LINQ DataRow Reference in a GridView's ItemTemplate

    - by Bob Kaufman
    Given the following GridView: <asp:GridView runat="server" ID="GridView1" AutoGenerateColumns="false" DataKeyNames="UniqueID" OnSelectedIndexChanging="GridView1_SelectedIndexChanging" > <Columns> <asp:BoundField HeaderText="Remarks" DataField="Remarks" /> <asp:TemplateField HeaderText="Listing"> <ItemTemplate> <%# ShowListingTitle( ( ( System.Data.DataRowView ) ( Container.DataItem ) ).Row ) %> </ItemTemplate> </asp:TemplateField> <asp:BoundField HeaderText="Amount" DataField="Amount" DataFormatString="{0:C}" /> </Columns> </asp:GridView> which refers to the following code-behind method: protected String ShowListingTitle( DataRow row ) { Listing listing = ( Listing ) row; return NicelyFormattedString( listing.field1, listing.field2, ... ); } The cast from DataRow to Listing is failing (cannot convert from DataRow to Listing) I'm certain the problem lies in what I'm passing from within the ItemTemplate, which is simply not the right reference to the current record from the LINQ to SQL data set that I've created, which looks like this: private void PopulateGrid() { using ( MyDataContext context = new MyDataContext() ) { IQueryable < Listing > listings = from l in context.Listings where l.AccountID == myAccountID select l; GridView1.DataSource = listings; GridView1.DataBind(); } }

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  • Asymptotic complexity of a compiler

    - by Meinersbur
    What is the maximal acceptable asymptotic runtime of a general-purpose compiler? For clarification: The complexity of compilation process itself, not of the compiled program. Depending on the program size, for instance, the number of source code characters, statements, variables, procedures, basic blocks, intermediate language instructions, assembler instructions, or whatever. This is highly depending on your point of view, so this is a community wiki. See this from the view of someone who writes a compiler. Will the optimisation level -O4 ever be used for larger programs when one of its optimisations takes O(n^6)? Related questions: When is superoptimisation (exponential complexity or even incomputable) acceptable? What is acceptable for JITs? Does it have to be linear? What is the complexity of established compilers? GCC? VC? Intel? Java? C#? Turbo Pascal? LCC? LLVM? (Reference?) If you do not know what asymptotic complexity is: How long are you willing to wait until the compiler compiled your project? (scripting languages excluded)

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  • Shopify JSONP issue in ajaxAPI

    - by Aaron U
    I'm getting some odd response back from shopify ajaxapi for jsonp. If you cURL a Shopify ajax api location http://storename.domain.com/cart.json?callback=handler you will get a jsonp response. But something is breaking the same request in browsers. It appears to be related to compression? Here are some responses from each browser when attempting to call the jsonp as documented. Firefox: The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression. Internet Explorer: Internet Explorer cannot display the webpage Chrome/Safari/Webkit: Cannot decode raw data, or failed (chrome) Attempted use via jquery: $.getJSON('http://storename.domain.com/cart.json?callback=?', function(data) { ... }); // Results in a failed request, viewable network request panels of dev tools Here is some output from cURL including response headers: $ curl -i http://storename.domain.com/cart.json?callback=CALLBACK_FUNC HTTP/1.1 200 OK Server: nginx Date: Tue, 18 Dec 2012 13:48:29 GMT Content-Type: application/javascript; charset=utf-8 Transfer-Encoding: chunked Connection: keep-alive Status: 200 OK ETag: cachable:864076445587123764313132415008994143575 Cache-Control: max-age=0, private, must-revalidate X-Alternate-Cache-Key: cachable:11795444887523410552615529412743919200 X-Cache: hit, server X-Request-Id: a0c33a55230fe42bce79b462f6fe450d X-UA-Compatible: IE=Edge,chrome=1 Set-Cookie: _session_id=b6ace1d7b0dbedd37f7787d10e173131; path=/; HttpOnly X-Runtime: 0.033811 P3P: CP="NOI DSP COR NID ADMa OPTa OUR NOR" CALLBACK_FUNC({"token":null,"note":null,"attributes":{},"total_price":0,...}) Also related unanswered here: Shopify Ajax API JSONP supported? Thanks

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