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  • Rails migration to add boolean column to Postgres on Heroku

    - by pmc255
    I'm trying to execute a simple Rails migration to add a boolean column to an existing table. Here's the add_column call: add_column :users, :soliciting, :boolean, :null => false, :default => false However, after the migration runs (successfully, with no errors), I don't see the new column. If I go into the console and list the columns on the User table, for example, with this command: >> User.columns.each { |c| puts "#{c.name} : #{c.type}" } All the other columns show up, but not the one I just added with the migration. What's even more strange is that looking up a random user object yields the Postgres version of booleans (Ruby strings) >> User.find(1).soliciting => "t" However, the existing boolean columns all show up with standard Ruby boolean values of true and false. What's going on here? Is the migration actually complete? Why doesn't the column show up, yet is accessible in the model objects?

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  • django-rest-framework: api versioning

    - by w--
    so googling around it appears that the general consensus is that embedding version numbers in REST URIs is a bad practice and a bad idea. even on SO there are strong proponents supporting this. e.g. Best practices for API versioning? My question is about how to accomplish the proposed solution of using the accept header / content negotiation in the django-rest-framework to accomplish this. It looks like content negotiation in the framework, http://django-rest-framework.org/api-guide/content-negotiation.html is already configured to automatically return intended values based on accepted MIME types. If I start using the Accept header for custom types, I'll lose this benefit of the framework. Is there a better way to accomplish this in the framework?

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  • Iphone SDK, arc4random CGPointmake?

    - by Harry
    I have tried using integers to store the number like so: playPin = 35 + arc4random() % 118; playY = -50 - arc4random() %100; if (CGRectIntersectsRect(pin.frame, refreshpin.frame)){ pin.center = CGPointMake(playPin, playY); pinend.center = CGPointMake(pin.center.x, pin.center.y+58); } Then using them, when needed, but... its random the first time, then it just keeps repeating itself. then i tried this: if (CGRectIntersectsRect(pin.frame, refreshpin.frame)){ pin.center = CGPointMake(35 + arc4random() % 118, -50 - arc4random() %100); pinend.center = CGPointMake(pin.center.x, pin.center.y+58); } And this also doesn't work, you cant even see the items i want to display! Any ideas? Thanks. Harry.

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  • Creating a form for editing embedded documents with MongoMapper

    - by Luke Francl
    I'm playing around with MongoMapper but I'm having trouble figuring out how to create a form for an object that has embedded documents. With ActiveRecord, I'd use fields_for but when asked if this would be supported a few months ago, MongoMapper author John Nunemaker wrote: "Nope and nope. It is really [not] that hard with attr_accessor's." OK, fair enough, but how do you write the form for this to work? I'm not interested in using the nested form implementations that are out there because I want to do this the "normal" way as I'm learning about MongoMapper. My model is simple enough - I've got a Person with embedded documents for email addresses, phone numbers, etc. I do not care about updating existing embedded documents. They can be re-created from the form input each time a Person is edited.

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  • Question with R. Element wise multiplication, addition, and division with 2 data.frames with varying

    - by Michael
    I have a various data.frames with columns of the same length where I am trying to multiple 2 rows together element-wise and then sum this up. For example, below are two vectors I would like to perform this operation with. > a.1[186,] q01_a q01_b q01_c q01_d q01_e q01_f q01_g q01_h q01_i q01_j q01_k q01_l q01_m 3 3 3 3 2 2 2 3 1 NA NA 2 2 and > u.1[186,] q04_avl_a q04_avl_b q04_avl_c q04_avl_d q04_avl_e q04_avl_f q04_avl_g q04_avl_h q04_avl_i q04_avl_j q04_avl_k q04_avl_l q04_avl_m 4 2 3 4 3 4 4 4 3 4 3 3 3` The issue is that various rows have varying numbers of NA's. What I would like to do is skip the multiplication with any missing values ( the 10th and 11th position from my above example), and then after the addition divide by the number of elements that were multiplied (11 from the above example). Most rows are complete and would just be multiplied by 13. Thank you!

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  • Pseudorandom crashes in Flash Debugger - My bad, or Abode's?

    - by rinogo
    I'm working on a large-size dual AS3/Flex project (some parts are pure AS3, other parts are Flex), and I'm experiencing a lot of Flash Debugger crashes. These crashes aren't completely random - it seems like I can get them to occur with greater consistency when I perform certain actions in my app. However, at the same time, they aren't consistently repeatable - sometimes a set of actions causes my app to crash, and other times, the same steps execute fine without a crash. I have two questions (carefully worded to remove my personal bias :) ) Are these crashes due to my coding practices, or Adobe's Flash Debugger? When I deploy my app on a web site and access it via Flash Player, should I expect the same crashes to occur, or is Flash Player considerably more resilient than Flash Debugger? Thanks so much, all! :) -Rich

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  • OpenGL es 2.0 Read depth buffer

    - by Brian
    Hi! As far as i know, we can't read the Z(depth) value in OpenGL ES 2.0. So I am wondering how we can get the 3D world coordinates from a point on the 2D screen? Actually I have some random thoughts might work. Since we can read the RGBA value by using glReadPixels, how about we duplicate the depth buffer and store it in a color buffer(say ColorforDepth). Of course there need to be some nice convention so that we don't lose any information of the depth buffer. And then when we need a point's world coordinates , we attach this ColorforDepth color buffer to the framebuffer and then render it. So when we use glReadPixels to read the depth information at this frame. However, this will lead to 1 frame flash since the colorbuffer is a weird buffer translated from the depth buffer. I am still wondering if there is some standard way to get the depth in OpenGL es 2.0? Thx in advance!:)

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  • the carry flag issue!

    - by Zia ur Rahman
    Suppose AX =FFFE and BX=1234 now if we write cmp ax,bx (bx will be subtracted from ax and the approprite flages will be updated) now the binary representation of the numbers in ax and bx is given by AX = 1111 1111 1111 1110 BX= 0001 0010 0011 0100 As bx will be subtracted from ax so we have to negate bx (as Result= ax+(-bx)) so the negated bx (2's complement of bx ) is given by. BX= 1110 1101 1100 1100 Now we add both ax and bx (as subtraction is implemented by addition in computer) AX= 1111 1111 1111 1110 BX= 1110 1101 1100 1100 ------------------------------------ 1 1110 1101 1100 1010 Now as you can see the result is of 17 bits now the 17th bit should go into carry flage, but when i checked it the carry flag is 0 that is CF=0 why?

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  • How can I tell if a user came to a page via a Google Adwords PPC campaign?

    - by Mike Crittenden
    I have a form with a hidden "Came from Adwords" field that will be marked true (via javascript) if the user came from a PPC campaign and will stay false if not. That way, when the user submits the form, we will have each submission stored with info about whether that submission came from adwords or not, all without the user knowing. How can I fetch this info? I know that Google sets a cookie called Conversion whenever you click a PPC link to a page, but the cookie's content is just random alphanumeric characters. Is there something in the Analytics/Adwords API that will let me test for this? Do I have to resort to adding ?ref=adwords or something onto the PPC URLs so that I can test that way?

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  • List of dict in Python

    - by plalex
    Hi everybody, I've got a list of dict in Python: dico_cfg = {'name': entry_name, 'ip': entry_ip, 'vendor': combo_vendor, 'stream': combo_stream} self.list_cfg.append(dico_cfg) I append to my list a lot of dict in the same way. Now I would like to delete one dict and only one dict in this list? What is the best way to proceed? I've try with the index of the list, but when I remove a dict from the list, the index is modify, so after some random remove my index doesn't correspond anymore to the dict I want to remove in my list. I hope that is clear. Maybe I can add an "id" row in my dict, so I can ask to remove more preciously the dict I want. I'll ask to remove the dict where id is equal to the id's dict I want to remove. How can I do that? I hope I'm enough clear. Sorry but I'm a newbie in Python.

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  • fire and forget compared to http request

    - by cometta
    Hi, i looking for opinion from you all. I have a web application that need to records data into another web application database. I not prefer to use http request GET on 2nd application because of latency issue. I looking for fast way to save records on 2nd application quickly, i came across the idea of "fire and forget" , will JMX suit for this scenario? from my understanding jmx will gurantee message delivery. Let say i need to call at least 1000 random requests per seconds to 2nd application should i use jmx? http request? or xmpp instead?

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  • Excel parsing (xls) date error

    - by tau-neutrino
    I'm working on a project where I have to parse excel files for a client to extract data. An odd thing is popping up here: when I parse a date in the format of 5/9 (may 9th) in the excel sheet, I get 39577 in my program. I'm not sure if the year is encoded here (it is 2008 for these sheets). Are these dates the number of days since some sort of epoch? Does anyone know how to convert these numbers to something meaningful? I'm not looking for a solution that would convert these properly at time of parsing from the excel file (we already have thousands of extracted files that required a human to select relevant information - re-doing the extraction is not an option).

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  • JasperReports: is it possible to use multiple data sources, or if not, to use collections in paramet

    - by Knut Arne Vedaa
    It seems that the reporting idiom is that a report consist of a single list of items, with some additional data (parameters). Are there ways to include several unrelated lists in a report, or would this go against the idiom to such an extent that a different tool should rather be used to generate the output? Suppose, for instance, you have a list of Persons that lives in a Building, with names, phone numbers and so on. This list would be the main datasource. Additionally, on the same report you want to show various other information about that Building, such as address, number of floors and so on. The number of items in this information might vary between Buildings, so that you cannot simply put it into static parameters, but would need a map or a list. This is of course a contrieved example, but should serve to illustrate the problem. In short: can you use several unrelated lists in a report?

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  • C# timer won't tick

    - by Andrej
    hi, i have a strange problem... I've been going out of my mind for the past couple of hours... the timer i put in my winform code (from the toolbar) won't tick... I have timers on a couple of forms in my program, they all work fine... I try to do exactly the same it this it won't tick... I select it, drag it on to a form, enable it, set interval and handle the tick event... and nothing happens... i even tried putting random code like messagebox.show in the tick event just to see if anything happens, and nothing!!! as I said, a have a couple of more timer in my program (on other forms, not in the one i'm trying to put this timer) and they all work fine... any suggestions? thanks in advance!

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  • backslashbox is too wide

    - by Tim
    Hi I feel the first column in my longtable is too wide. Please see the figure below My code is: \begin{center} \begin{longtable}{|c|c|c|c|c|c|} \caption{Error rates for SVM and 100 random counts. \label{tab:svmcount100errortable}}\\ \hline \backslashbox{Concepts}{Train sizes} & 10 & 100 & 1000 & 10000 & 100000\\ \hline 1 & 0.49 (0.00) & 0.49 (0.00) & 0.47 (0.00) & 0.43 (0.00) & 0.33 (0.00)\\ \hline \end{longtable} \end{center} I wonder if there is some way to reduce the width of the first column? Thanks and regards!

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  • Mysql PHP generated table: doesn't work with Tablesorter

    - by echedey lorenzo
    Hi, I found this great Tablesorter plugin for jQuery but I can't make it work with my PHP generated table. Here's the code: <script type="text/javascript"> function table() { $("#container").load("table.php?randval="+Math.random()); } $(document).ready(function() { table(); $("table").tablesorter(); }); </script> Where #container is the div where the table will be and table is the name of the table. I get the table loaded but sorting function is not working. It works if I put the table directly in html in the page.. but I don't see the point in having a static table for sorting. Any help would be very appreciated.

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  • onload Event in embedded SVG not calling function in attached script. Scope Issue?

    - by Nick
    Hi So I've got an XHTML page with a script - not inline > <script type="text/javascript" > src="../global/js/scripts.js"></script> and an embedded (I tried embed and object, same behavior) SVG document with a onload="CheckIfLoaded(evt)" attribute. The problem is firefox doesn't call the CheckIfLoaded() function in scripts.js. Firebug gives me "CheckIfLoaded() is not defined" with no reference to any line numbers. I can't find any information regarding the scope of javascript functions with respect to embedded content. Curiously, it works fine in IE. I could of course add a reference to the script into the SVG file as well but I believe that will result in the client downloading the scripts file twice and in addition I have 1000+ svg files and I'd really rather not add one line to all of them, although I suppose I could write a batch file or whatever if I have to. Any one know more about this? Thanks, Nick

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  • odd problem with jni interacting with dll's - not sure why a change to gc ergonomics fixes it

    - by jim hale
    We were having a problem with our Tomcat jvm blowing up and giving us an hs_* dump at random times but always in the same spot, that wasn't very informative other than saying we had an EXCEPTION_ACCESS_VIOLATION Commenting out various parts of the java that called particular jni functions just made it blow consistently in another spot. By changing our jvm options from: set PAF_OPTS=-Xms1024m -Xmx32000m -server -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+DisableExplicitGC -XX:+UseCompressedOops -Djava.library.path="%CATALINA_HOME%"\jni -Dcom.sun.management.jmxremote TO set PAF_OPTS=-Xms1024m -Xmx32000m -server -XX:+DisableExplicitGC -XX:+UseCompressedOops -Djava.library.path="%CATALINA_HOME%"\jni -Dcom.sun.management.jmxremote The problem went away. The solution does not give me a warm and fuzzy however and am wondering anyone might understand what's going on under the covers here. Environment: jdk1.6, 64 bit OS and Java, Tomcat, Windows

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  • BIC generator - Generate BIC from IBAN bank account number

    - by Tim
    Is there any existing library or script I can use to generate the BIC code from an IBAN bank account number (and other necessary information)? I've searched the web, but found only IBAN generators. Thanks in advance! Edit: Solution for Belgian IBAN's There exists a webservice for Belgian iban numbers, it's very easy to get the bic from the iban bank account number. $client = new SoapClient('http://www.ibanbic.be/IBANBIC.asmx?WSDL'); $bban = $client->getBelgianBBAN(array('Value' => $iban))->getBelgianBBANResult; $bic = $client->BBANtoBIC(array('Value' => $bban))->BBANtoBICResult; I've searched for a dutch webservice aswell, but I couldn't find one. But you can always make one yourself with the data from http://www.betaalvereniging.nl/europees-betalen/sepa-documentatie/bic-afleiden-uit-iban/

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  • Zend_Table_Db and Zend_Paginator and Zend_Paginator_Adapter_DbSelect

    - by Uffo
    I have the following query: $this->select() ->where("`name` LIKE ?",'%'.mysql_escape_string($name).'%') Now I have the Zend_Paginator code: $paginator = new Zend_Paginator( // $d is an instance of Zend_Db_Select new Zend_Paginator_Adapter_DbSelect($d) ); $paginator->getAdapter()->setRowCount(200); $paginator->setItemCountPerPage(15) ->setPageRange(10) ->setCurrentPageNumber($pag); $this->view->data = $paginator; As you see I'm passing the data to the view using $this->view->data = $paginator Before I didn't had $paginator->getAdapter()->setRowCount(200);I could determinate If I have any data or not, what I mean with data, if the query has some results, so If the query has some results I show the to the user, if not, I need to show them a message(No results!) But in this moment I don't know how can I determinate this, since count($paginator) doesn't work anymore because of $paginator->getAdapter()->setRowCount(200);and I'm using this because it taks about 7 sec for Zend_Paginator to count the page numbers. So how can I find If my query has any results?

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  • Web Page Design Get Distorted in Desktop PC Monitor

    - by Tarik
    I am building my web application on my laptop but when I navigate the page on my desktop pc the layout of the div are distorted. I think the solution is giving percentage instead of absolute numbers like 240px to height and width of divs. What do you think ? Do you have another recommendations ? Thanks in advance. What I've done is : <div style="height:240px;width:240px"></div> What I think I have to do is : <div style="height:100%;width:90%"></div>

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  • Drupal CCK 3 Multigroup tables with views

    - by henrijs.seso
    Hi, Each node have CCK-3-dev multigroup with 3 fields. Can I use one of fields as table header? Values of this field are taken from Taxonomy. With a simple recipe example, where food Z and Y are 2 nodes with recipes and each node has multigroup with ingredient name (milk, fish), amount (numbers) and unit (g, kg). Is there a way to create a table like this with views, I want to use views calc to calculate total amount of ingredient needed to prepare multiple recipes: Ingredient A Ingredient B Ingredient C Food Z 200 g 700 g 0 g Food Y 500 g 1000 g 50 g I don't even need units by number, but that would be good too. Anyways, how do I get this?

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  • Best practices for defining and initializing variables in web.xml and then accessing them from Java

    - by DutrowLLC
    I would like to define and initialize some variables in web.xml and the access the values of these variables inside my Java application. The reason I want to do this is because I would like to be able to change the values of these variables without having to recompile the code. What is the best practice for doing this? Most of the variables are just strings, maybe some numbers as well. Does the class that accesses the variables have to be a servlet? Thanks! Chris

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  • How can I prevent Telerik RadChart from generating an onerror attribute?

    - by Sean McMillan
    We're using the Telerik Rad Controls for ASP.Net Ajax on an ASP.Net MVC project. The RadChart generates the following HTML: <img onerror="if(confirm('Error loading RadChart image.\nYou may also wish to check the ASP.NET Trace for further details.\nDisplay stack trace?'))window.location.href=this.src;" src="ChartImage.axd?UseSession=true&amp;ChartID=e25ad666-e05b-4a92-ac0c-4f2c729b9382_chart_ctl00$MainContent$AverageCTMChart&amp;imageFormat=Png&amp;random=0.501658702968461" usemap="#imctl00_MainContent_AverageCTMChart" style="border-width: 0px;" alt=""> I'd like to remove the onerror attribute; I don't really want the customers being offered the option to see a stack trace if something goes wrong. I can't see any way to control the markup that this control generates. Google searches provide no help. Has anyone dealt with this before? How do I remove the onerror attribute?

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  • How to dispose NHibernate ISession in an ASP.NET MVC App

    - by Joe Young
    I have NHibernate hooked up in my asp.net mvc app. Everything works fine, if I DON'T dispose the ISession. I have read however that you should dispose, but when I do, I get random "Session is closed" exceptions. I am injecting the ISession into my other objects with Windsor. Here is my current NHModule: public class NHibernateHttpModule : IHttpModule { public void Init(HttpApplication context) { context.BeginRequest += context_BeginRequest; context.EndRequest += context_EndRequest; } static void context_EndRequest(object sender, EventArgs e) { CurrentSessionContext.Unbind(MvcApplication.SessionFactory); } static void context_BeginRequest(object sender, EventArgs e) { CurrentSessionContext.Bind(MvcApplication.SessionFactory.OpenSession()); } public void Dispose() { // do nothing } } Registering the ISession: container .Register(Component.For<ISession>() .UsingFactoryMethod(() => MvcApplication.SessionFactory.GetCurrentSession()).LifeStyle.Transient); The error happens when I tack the Dispose on the unbind in the module. Since I keep getting the session is closed error I assume this is not the correct way to do this, so what is the correct way? Thanks, Joe

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