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  • anonymous function variable scope [js, ajax]

    - by arthurprs
    $(".delete").click( function() { var thesender = this; $(thesender).text("Del..."); $.getJSON("ajax.php", {}, function(data) { if (data["result"]) $(thesender).remove(); // variable defined outside else alert('Error!'); } ); return false; } ); This can cause problems if user clicks on another ".delete" before the ajax callback is called?

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  • rake db:migrate gives a uninitialized class variable @@configuration in Rails error

    - by PK
    uninitialized class variable @@configuration in Rails /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:19:in `configuration' /usr/lib/ruby/gems/1.8/gems/thoughtbot-factory_girl-1.2.2/lib/factory_girl.rb:24 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require' This is the initial part of the enviroment.rb: RAILS_GEM_VERSION = '2.1.0' unless defined? RAILS_GEM_VERSION require File.join(File.dirname(__FILE__), 'boot') Rails::Initializer.run do |config| config.gem "oauth", :version => "0.2.7", :lib => "oauth"

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  • What's a good library for parsing mathematical expressions in java?

    - by CSharperWithJava
    I'm an Android Developer and as part of my next app I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants, trig and exponential functions, etc. I've looked around and Jep seems to be popular, but I would like to hear more suggestions, especially from people who have used these libraries before.

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  • Derivative of a Higher-Order Function

    - by Claudiu
    This is in the context of Automatic Differentiation - what would such a system do with a function like map, or filter - or even one of the SKI Combinators? Example: I have the following function: def func(x): return sum(map(lambda a: a**x, range(20))) What would its derivative be? What will an AD system yield as a result? (This function is well-defined on real-number inputs).

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  • How do I add a reference to an assembly?

    - by Gold
    I am trying to run some PDF to text C# code. I have references to 2 DLLs and I get this error when I try to run the program: the type 'java.io.File' is defined in an assembly that is not referenced. You must add a reference to assembly 'IKVM.GNU.Classpath, Version=0.20.0.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58'. How do I add a reference to this assembly?

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  • How to open a nested child PreferenceScreen in Android.

    - by Mike
    Hello, I have a PreferenceScreen that is defined in XML that serves all the preferences for my application. This PreferenceScreen also has a child PreferenceScreen nested within it. My implementing class is called PreferencesActivity. I know I can open the main Preferences window via startActivity(new Intent(this, PreferencesActivity.class)); but how do I go about opening the child PreferenceScreen via an Intent?

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  • Problems with deploying struts annotations in ear file

    - by Asif
    I am attempting to make use of the struts 2 annotations, what I have found is if I deploy the app as a war file everything works fine but if I deploy my war as part of an ear file none of the struts annotations work only the actions defined in struts.xml work. I can't seem to work out why deploying as a ear file annotations don't work. Has anyone else experienced this problem? I am using struts 2.1.8 and deploying to Jboss 5 thanks

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  • How to restrict rightBarButtonItem size in UINavigationBar ?

    - by lefakir
    I create a rightBarButtonItem with this method : - (UIBarButtonItem *)customBarButtonWithSelector:(SEL)callback { UIButton *customButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; customButton.bounds = CGRectMake(0, 0, 30.0f, 30.0f); return [[[UIBarButtonItem alloc] initWithCustomView:customButton] autorelease]; } At execution time the selector is fired when the bar is touched outside the button (near the middle). Is there a way to restrict the event responder in the defined bounds or in a acceptable range ?

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  • ForeignKey django 1.1.1 model

    - by Spikie
    i have class staff_name(models.Model): firstname = models.CharField(max_length=150) surname = models.CharField(max_length=150) class inventory_transaction(models.Model): staffs = models.ForeignKey(staff_name) i want to get or create staff surname and first name through inventory_transaction i used these code below inventory_transaction.objects.get_or_create(staffs_surname_contains=sname,staffs_firstname_contains=fname) i got this error "staffs_surname_contains can not be defined" what have i done wrong ? thanks

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  • Using Jquery.Form Plugin + MultiFile to automatically upload a single file

    - by Alan Neal
    I wanted to find a way to upload a single file*, in the background, have it start automatically after file selection, and not require a flash uploader, so I am trying to use two great mechanisms (jQuery.Form and JQuery MultiFile) together. I haven't succeeded, but I'm pretty sure it's because I'm missing something fundamental. Just using MultiFile, I define the form as follows... <form id="photoForm" action="image.php" method="post" enctype="multipart/form-data"> The file input button is defined as... <input id="photoButton" "name="sourceFile" class="photoButton max-1 accept-jpg" type="file"> And the Javascript is... $('#photoButton').MultiFile({ afterFileSelect: function(){ document.getElementById("photoForm").submit(); } }); This works perfectly. As soon as the user selects a single file, MultiFile submits the form to the server. If instead of using MultiFile, as shown above, let's say I include a Submit button along with the JQuery Form plugin defined as follows... var options = { success: respondToUpload }; $('#photoForm').ajaxForm(options); ... this also works perfectly. When the Submit button is clicked, the form is uploaded in the background. What I don't know how to do is get these two to work together. If I use Javascript to submit the form (as shown in the MultiFile example above), the form is submitted but the JQuery.Form function is not called, so the form does not get submitted in the background. I thought that maybe I needed to change the form registration as follows... $('#photoForm').submit(function() { $('#photoForm').ajaxForm(options); }); ...but that didn't solve the problem. The same is true when I tried .ajaxSubmit instead of .ajaxForm. What am I missing? BTW: I know it might sound strange to use MultiFile for single-file uploads, but the idea is that the number of files will be dynamic based on the user's account. So, I'm starting with one but the number changes depending on conditions.

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  • Embedding more text into the mail body in SMTP Gmail sender

    - by Rahul Varma
    Hi folks, I am using Gmail sender function defined here to send a mail to the predefined mail id. But my problem is that i want to embed more text into the body of my mail... The Gmail sender is only accepting one sting to be embedded into the body of the mail. Can anyone tell me how to embed more strings into the body of the mail... If Gmail sender is not efficient method to send a mail then please suggest me an alternative with an example....

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  • Looking for Java libraries to create a report editor

    - by Julian
    I have to develop a specialised report editor in Java. The user will get a number of fields that can be layed out on a page plus some graphical elements. The resulting report design needs to be serialized into already defined database tables. Is there any software library that will help to achieve this without reinventing the wheel? I have come across Eclipse GEF and Zest, but I am not sure if this really meets my problem.

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  • ObjectDataSource typename of a singleton Business object

    - by luppi
    My singleton business object is defined in Global: public class Global : HttpApplication { public static BusinessForm BusinessFormLayer; void Application_Start(object sender, EventArgs e) { FormDalProvider concreteProvider = FormDalProvider.Instance; BusinessForumLayer = new BusinessForum(concreteProvider); } } My page: <asp:ObjectDataSource ID="objThreads" runat="server" SelectMethod="GetForms" SelectCountMethod="GetFormsCount" TypeName="Global.BusinessFormLayer" EnablePaging="true" SortParameterName="sortExpression">

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  • Why are my resources suddenly unresolved in my Android project?

    - by Eno
    Eclipse is complaining about my Android project saying all my references to resources are unresolved, even though R.java does exist. For example: signin_btn=(Button)findViewById(R.id.signin_btn); signin_btn.setOnClickListener(this); I definately have signin_btn defined in my resources. Dont know why Eclipse is not seeing my R class anymore. How to fix?

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  • jQuery Tooltip widget well-suited to use with an IMAGE-MAP? suggestions/recommendations please

    - by Tim
    I would like to display different tooltip content for each of the areas defined in an image-map. Are there any jQuery plug-ins that have an API well-suited to use with image-maps? I would like it also be be flexible with regard to where the tooltip content comes from, e.g. the content might be contained in an anchor element of an invisible iframe or it might come from a database. Thanks

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  • Javascript Associative Arrays

    - by John Hartsock
    Hello all, It seems to me that this should work but I cant see what exactly is the problem. The error Im receiving is "DDROA is not defined" Could anyone help enlighten me. var DDROA = { AllowedRoutes : { AR0 : {text : 'SomeText', value : 'SomeValue'}, AR1 : {text : 'SomeText2', value : 'SomeValue2'} }, RouteContext : { RC0 : {text : 'None', value : '0', AllowedRoutes : new Array( DDROA.AllowedRoutes.AR0 // An error occurs here ) } } }

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  • Entering and retrieving data from SQLite for an android List View

    - by Infiniti Fizz
    Hi all, I started learning android development a few weeks ago and have gone through the developer.android.com tutorials etc. But now I have a problem. I'm trying to create an app which tracks the usage of each installed app. Therefore I'm pulling the names of all installed apps using the PackageManager and then trying to put them into an SQLite database table. I am using the Notepad Tutorial SQLite implementation but I'm running into some problems that I have tried for days to solve. I have 2 classes, the DBHelper class and the actual ListActivity class. For some reason the app force closes when I try and run my fillDatabase() function which gets all the app names from the PackageManager and tries to put them into the database: private void fillDatabase() { PackageManager manager = this.getPackageManager(); List<ApplicationInfo> appList = manager.getInstalledApplications(0); for(int i = 0; i < appList.size(); i++) { mDbHelper.addApp(manager.getApplicationLabel(appList.get(i)).toString(), 0); } } addApp() is a function defined in my AppsDbHelper class and looks as follows: public long createApp(String name, int usage) { ContentValues initialValues = new ContentValues(); initialValues.put(KEY_NAME, name); initialValues.put(KEY_USAGE, usage); return mDb.insert(DATABASE_TABLE, null, initialValues); } The database create is defined as follows: private static final String DATABASE_CREATE = "create table notes (_id integer primary key autoincrement, " + "title text not null, usage integer not null);"; I have commented out all statements that follow fillDatabase(); in the onCreate() method of the ListActivity and so know that it is definetely the problem but I don't know why. I am taking the appName and putting it into the KEY_NAME field of the row and putting 0 into the KEY_USAGE field of the row (because initially, my app will default the usage of each app to 0 (not used yet)). If my addApp() function doesn't take the usage and just puts KEY_NAME into the ContentValues and into the database, it seems to work fine, but I want a column for usage. Any ideas why it is not working? Have I overlooked something? Thanks for your time, InfinitiFizz

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  • Searchable list of objects in Java

    - by Christian
    I want to create a large (~300,000 entries) List of self defined objects of the class Drug. Every Drug has an ID and I want to be able to search the Drugs in logarithmic time via that ID. What kind of List do I have to use? How do I declare that it should be searchable via the ID?

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  • Unstable DNS with bind

    - by yasser abd
    we have a Centos machine called jupiter, on which I have installed bind9, On every other machine the DNS is set to be the IP address of jupiter (192.168.2.101), as you can see in the output of the following command in windows >ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : mypcs Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller Physical Address. . . . . . . . . : 00-1A-A0-AC-E4-CC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::c16d:3ae4:5907:30c4%8(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.2.98(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Thursday, September 20, 2012 10:26:11 AM Lease Expires . . . . . . . . . . : Sunday, September 23, 2012 10:26:10 AM Default Gateway . . . . . . . . . : 192.168.2.1 DHCP Server . . . . . . . . . . . : 192.168.2.1 DHCPv6 IAID . . . . . . . . . . . : 201333408 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-3A-50-01-00-1A-A0-AC-E4-CC DNS Servers . . . . . . . . . . . : 192.168.2.101 192.168.2.1 192.168.2.1 NetBIOS over Tcpip. . . . . . . . : Enabled All machines can always nslookup one of the domain (mydomain.com) that is set in the jupiter's DNS server, you can see that in the output of nslookup on the same windows machine: >nslookup mydomain.com Server: UnKnown Address: 192.168.2.101 Name: mydomain.com Address: 192.168.2.100 The problem is, sometimes mydomain.com can not be pinged, here is the output of the ping on the same windows machine >ping mydomain.com Ping request could not find host mydomain.com. Please check the name and try again. This looks very random, and happens once in a while, so the machine can lookup the DNS records but can't ping it, nor can browse the website that is hosted on mydomain.com, which should resolve to 192.168.2.100 On a linux machine that has the same DNS settings, the output of dig command for mydomain is as follows: $ dig mydomain.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.2 <<>> mydomain.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36090 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 ;; QUESTION SECTION: ;mydomain.com. IN A ;; ANSWER SECTION: mydomain.com. 86400 IN A 192.168.2.100 ;; AUTHORITY SECTION: mydomain.com. 86400 IN NS jupiter. ;; ADDITIONAL SECTION: jupiter. 86400 IN A 192.168.2.101 ;; Query time: 1 msec ;; SERVER: 192.168.2.101#53(192.168.2.101) ;; WHEN: Thu Sep 20 16:32:14 2012 ;; MSG SIZE rcvd: 83 We've never had the same problem on MACs, they always resolve mydomain.com Here is how I have defined mydomain.com on Bind9's configs on Jupiter, notice that the name of the machine on 192.168.2.100 is venus, so I have this file: /var/named/named.venus: $TTL 1D @ IN SOA jupiter. admin.ourcompany.com. ( 2003052800 ; serial 86400 ; refresh 300 ; retry 604800 ; expire 3600 ; minimum ) @ IN NS jupiter. @ IN A 192.168.2.100 * IN A 192.168.2.100 /var/named/zones/named.venus.zone zone "mydomain.com" IN {type master;file "/var/named/named.venus";allow-update {none;};}; One thing to note is that I haven't defined reverse DNS lookups, only the forward DNS lookups are defined in Bind9 configs, not sure if that's relevant or not. So my question is, why is this being so unstable? what could be the cause?

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  • Problem getting correct parameters for C# P/Invoke call to C++ dll

    - by Jim Jones
    Trying to Interop a functionality from the Outside In API from Oracle. Have the following function: SCCERR EXOpenExport {VTHDOC hDoc, VTDWORD dwOutputId, VTDWORD dwSpecType, VTLPVOID pSpec, VTDWORD dwFlags, VTSYSPARAM dwReserved, VTLPVOID pCallbackFunc, VTSYSPARAM dwCallbackData, VTLPHEXPORT phExport); From the header files I reduced the parameters to: typedef VTSYSPARAM VTHDOC, VTLPHDOC * typedef DWORD_PTR VTSYSPARAM typedef unsigned long DWORD_PTR typedef unsigned long VTDWORD typedef VTVOID* VTLPVOID #define VTVOID void typedef VTHDOC VTHEXPORT, *VTLPEXPORT These are for 32 bit windows Going through the header files, the example programs, and the documentation I found: 1. That pSpec could be a pointer to a buffer or NULL, so I set it to a IntPtr.Zero (documentation). 2. That dwFlags and dwReserved according to the documentation "Must be set by the developer to 0". 3. That pCallbackFunc can be set to NULL if I don't want to handle callbacks. 4. That the last two are based on structs that I wrote C# wrappers for using the [StructLayout(LayoutKind.Sequential)]. Then instatiated an instance and generated the parameters by first creating a IntPtr with Marshal.AllocHGlobal(Marshal.SizeOf(instance)), then getting the address value which is passed as a uint for dwCallbackData and a IntPtr for phExport. The final parameter list is as follows: 1. phDoc as a IntPtr which was loaded with an address by the DAOpenDocument function called before. 2. dwOutputId as uint set to 1535 which represents FI_JPEGFIF 3. dwSpecType as int set to 2 which represents IOTYPE_ANSIPATH 4. pSpec as an IntPtr.Zero where the output will be written 5. dwFlags as uint set to 0 as directed 6. dwReserved as uint set to 0 as directed 7. pCallbackFunc as IntPtr set to NULL as I will handle results 8. dwCallBackDate as uint the address of a buffer for a struct 9. phExport as IntPtr to another struct buffer still get an undefined error from the API. Meaning that the call returns a 961 which is not defined in any of the header files. In the past I have gotten this when my choice of parameter types are incorrect. I started out using Interop Assistant which was helpful in learning how many of the parameter types get translated. It is however limited by how well I am able to glean the correct native type from the header files. For example the hDoc parameter used in the preceding function was defined as a non-filesytem handle, so attempted to use Marshal to create a handle, then used an IntPtr, and finally it turned out to be an int (actually it was &phDoc used here). So is there a more scientific way of doing this, other than trial and error? Jim

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  • Great Circle & Ray intersection

    - by Karl T
    I have a Latitude, Longitude, and a direction of travel in degrees true north. I would like to calculate if I will intersect a line defined by two more Lat/Lon points. I figure the two points defining the line would create my great circle and my location and azimuth would define my ray (or possibly a small circle). Any ideas?

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