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  • How to order search results by multiple fields?

    - by JustinRoR
    I am using Sunspot and Will_paginate for search in my application and don't how to have my search results start out with certain ordering conditions. The model I am searching is the UserPrice model and want my :price and :purchase_date in descending order or lowest price to highest and present date to past: class UserPrice < ActiveRecord::Base attr_accessible :price, :product_name, :purchase_date belongs_to :product # Sunspot configuration searchable do text :product_name do product.name end end end class SearchController < ApplicationController def index @search = UserPrice.search do fulltext params[:search] paginate(:per_page => 5, :page => params[:page]) end @user_prices = @search.results end end Even though I don't know how, I'm not sure if I would use Sunspot or Will_paginate to sort by order of price and purchase date. How would I achieve this though? Thank you. UPDATE I try to use the order_by method but not sure how the model would look now. class SearchController < ApplicationController def index @search = UserPrice.search do fulltext params[:search] paginate(:per_page => 5, :page => params[:page]) facet(:business_retail_store_id) facet(:business_online_store_id) order_by :price, :desc order_by :purchase_date, :desc end @user_prices = @search.results end end Not sure why having the following in my controller: order_by :price, :desc order_by :purchase_date, :desc I get the error: Sunspot::UnrecognizedFieldError in SearchController#index No field configured for UserPrice with name 'price' This doesn't make sense to me since I do have these fields inside of my UserPrice model and in my database. How do I fix this?

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  • Is it bad practise to initialise fields outside of an explicit constructor

    - by MrTortoise
    So its monday and we are arguing about coding practises. The examples here are a litttle too simple, but the real deal has several constructors. In order to initialise the simple values (eg dates to their min value) I have moved the code out of the constructors and into the field definitions. public class ConstructorExample { string _string = "John"; } public class ConstructorExample2 { string _string; public ConstructorExample2() { _string = "John"; } } How should it be done by the book. I tend to be very case by case and so am maybe a little lax abotu this kind of thing. However i feel that accams razor tells me to move the initialisation out of multiple constructors. Of course I could always move this shared initialisation into a private method. The question is essentially ... is initialising fields where they are defined as opposed to the constructor bad in any way? The argument I am facing is one of error handling, but i do not feel it is relevant as there are no possible exceptions that won't be picked up at compile time.

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  • F# ref-mutable vars vs object fields

    - by rwallace
    I'm writing a parser in F#, and it needs to be as fast as possible (I'm hoping to parse a 100 MB file in less than a minute). As normal, it uses mutable variables to store the next available character and the next available token (i.e. both the lexer and the parser proper use one unit of lookahead). My current partial implementation uses local variables for these. Since closure variables can't be mutable (anyone know the reason for this?) I've declared them as ref: let rec read file includepath = let c = ref ' ' let k = ref NONE let sb = new StringBuilder() use stream = File.OpenText file let readc() = c := stream.Read() |> char // etc I assume this has some overhead (not much, I know, but I'm trying for maximum speed here), and it's a little inelegant. The most obvious alternative would be to create a parser class object and have the mutable variables be fields in it. Does anyone know which is likely to be faster? Is there any consensus on which is considered better/more idiomatic style? Is there another option I'm missing?

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  • Trouble accessing fields of a serialized object in Java

    - by typoknig
    I have instantized a class that implements Serializable and I am trying to stream that object like this: try{ Socket socket = new Socket("localhost", 8000); ObjectOutputStream toServer = new ObjectOutputStream(socket.getOutputStream()); toServer.writeObject(myObject); } catch (IOException ex) { System.err.println(ex); } All good so far right? Then I am trying to read the fields of that object like this: //This is an inner class class HandleClient implements Runnable{ private ObjectInputStream fromClient; private Socket socket; // This socket was established earlier try { fromClient = new ObjectInputStream(socket.getInputStream()); GetField inputObjectFields = fromClient.readFields(); double myFristVariable = inputObjectFields.get("myFirstVariable", 0); int mySecondVariable = inputObjectFields.get("mySecondVariable", 0); //do stuff } catch (IOException ex) { System.err.println(ex); } catch (ClassNotFoundException ex) { System.err.println(ex); } finally { try { fromClient.close(); } catch (Exception ex) { ex.printStackTrace(); } } } But I always get the error: java.io.NotActiveException: not in call to readObject This is my first time streaming objects instead of primitive data types, what am I doing wrong? BONUS When I do get this working correctly, is the ENTIRE CLASS passed with the serialized object (i.e. will I have access to the methods of the object's class)? My reading suggests that the entire class is passed with the object, but I have been unable to use the objects methods thus far. How exactly do I call on the object's methods? In addition to my code above I also experimented with the readObject method, but I was probably using it wrong too because I couldn't get it to work. Please enlighten me.

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  • Why use shorter VARCHAR(n) fields?

    - by chryss
    It is frequently advised to choose database field sizes to be as narrow as possible. I am wondering to what degree this applies to SQL Server 2005 VARCHAR columns: Storing 10-letter English words in a VARCHAR(255) field will not take up more storage than in a VARCHAR(10) field. Are there other reasons to restrict the size of VARCHAR fields to stick as closely as possible to the size of the data? I'm thinking of Performance: Is there an advantage to using a smaller n when selecting, filtering and sorting on the data? Memory, including on the application side (C++)? Style/validation: How important do you consider restricting colunm size to force non-sensical data imports to fail (such as 200-character surnames)? Anything else? Background: I help data integrators with the design of data flows into a database-backed system. They have to use an API that restricts their choice of data types. For character data, only VARCHAR(n) with n <= 255 is available; CHAR, NCHAR, NVARCHAR and TEXT are not. We're trying to lay down some "good practices" rules, and the question has come up if there is a real detriment to using VARCHAR(255) even for data where real maximum sizes will never exceed 30 bytes or so. Typical data volumes for one table are 1-10 Mio records with up to 150 attributes. Query performance (SELECT, with frequently extensive WHERE clauses) and application-side retrieval performance are paramount.

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  • Adding validations without knowing the fields

    - by Frexuz
    My example form <% form_for @ad do |f| %> <%= f.error_messages %> <p> <%= f.label :ad_type_id %><br /> <%= f.collection_select(:ad_type_id, AdType.all, :id, :name) %> </p> <p> <% @ad.ad_properties.each do |property| %> <%= property.name %>: <% f.fields_for :ad_values do |value_field| %> <%= value_field.text_field :ad_id, :value => @ad.id %> <%= value_field.text_field :ad_property_id, :value => property.id %> <%= value_field.text_field :value %> <% end %><br /><br /> <% end %> </p> <p> <%= f.label :description %><br /> <%= f.text_area :description %> </p> <p><%= f.submit %></p> <% end %> Explanation: Ad has many properties. I can add new properties at any time (it's a normal model). Lets say the Ad is of the type 'hotel'. Then I would add properties like 'stars' and 'breakfast_included' Then I store each of these properties' values in a separate model. And all this works fine with my form above. My problem: These fields are not validated because I can't know what their names are. I need to add validations dynamically somehow. My thought: #Before the normal validations kick in def add_validations self.properties.each do |property| property.add_validation :whatever #somehow :) end end How could I do this?

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  • Adding fields to Django form dynamically (and cleanly)

    - by scott
    Hey guys, I know this question has been brought up numerous times, but I'm not quite getting the full implementation. As you can see below, I've got a form that I can dynamically tell how many rows to create. How can I create an "Add Row" link that tells the view how many rows to create? I would really like to do it without augmenting the url... # views.py def myView(request): if request.method == "POST": form = MyForm(request.POST, num_rows=1) if form.is_valid(): return render_to_response('myform_result.html', context_instance=RequestContext(request)) else: form = MyForm(num_rows=1) return render_to_response('myform.html', {'form':form}, context_instance=RequestContext(request)) # forms.py class MyForm(forms.Form): def __init__(self, *args, **kwargs): num_rows = kwargs.pop('num_rows',1) super(MyForm, self).__init__(*args, **kwargs) for row in range(0, num_rows): field = forms.CharField(label="Row") self.fields[str(row)] = field # myform.html http://example.com/myform <form action="." method="POST" accept-charset="utf-8"> <ul> {% for field in form %} <li style="margin-top:.25em"> <span class="normal">{{ field.label }}</span> {{ field }} <span class="formError">{{ field.errors }}</span> </li> {% endfor %} </ul> <input type="submit" value="Save"> </form> <a href="ADD_ANOTHER_ROW?">+ Add Row</a>

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  • Fill fields on a webpage

    - by MajuiF
    Hi everyone, I've already asked this question, but it's still too unclear to me, and it seems people haven't understood what I'm trying to do, so I'll try and be clearer. This website: https://www4.polymtl.ca/poly/poly.html is the website I want to fill. What I would like to be able to do, is modify the values of the "nip", "code", and "naissance" fields with text (for example, code being "majuif"). <input type=password name=code size=8 maxlength=8> <input type=password name=nip size=8 maxlength=8> <input type=password name=naissance size=8 maxlength=8> However, I don't know how to do that. And this is my problem. Should I write another HTML file - I don't know if the word "macro" can be used for that, but I'm pretty sure it can - and insert JavaScript in it? Please note that I'm not a professional in JavaScript or HTML, but I have basics, and still learning. Thanks, -Max.

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  • Blackberry UI tool bar : fields alignment

    - by Galaxy
    i am developing custom toolbar manager, but i want to adjust the fields alignment to be centered not aligned to the left , any advice below is the code of toolbar package galaxy.bb.ui.container; import net.rim.device.api.ui.Color; import net.rim.device.api.ui.Graphics; import net.rim.device.api.ui.XYEdges; import net.rim.device.api.ui.container.HorizontalFieldManager; import net.rim.device.api.ui.decor.Background; import net.rim.device.api.ui.decor.BackgroundFactory; import net.rim.device.api.ui.decor.Border; import net.rim.device.api.ui.decor.BorderFactory; public class ToolBarManager extends HorizontalFieldManager { private int bgColor = Color.BLACK; private int borderColor = Color.WHITE; private int borderStyle= Border.STYLE_FILLED; public ToolBarManager(){ super(USE_ALL_WIDTH); } public ToolBarManager(int bgColor) { super(USE_ALL_WIDTH); this.bgColor = bgColor; } public ToolBarManager(int bgColor, int borderStyle) { super(USE_ALL_WIDTH); this.bgColor = bgColor; this.borderStyle = borderStyle; } public int getBgColor() { return bgColor; } public void setBgColor(int bgColor) { this.bgColor = bgColor; } public int getBorderColor() { return borderColor; } public void setBorderColor(int borderColor) { this.borderColor = borderColor; } public int getBorderStyle() { return borderStyle; } public void setBorderStyle(int borderStyle) { this.borderStyle = borderStyle; } protected void paint(Graphics graphics) { super.paint(graphics); XYEdges padding = new XYEdges(5, 5, 5, 5); Border roundedBorder = BorderFactory.createRoundedBorder(padding, borderColor, borderStyle); this.setBorder(roundedBorder); Background bg = BackgroundFactory.createSolidBackground(bgColor); this.setBackground(bg); } }

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  • Creating nested fields for column on assignment table?

    - by H O
    I have three models, that represent a many to many relationship - Product, Sale and Product_sale. I have a nested form that allows me to create new products from the sale form - so far, so good. I have, however, added some additional fields to the assignment table - price, for example. How can I set the price on the assignment table from the product form, when it is nested in the sale form? I currently have the code below: <%= sale.fields_for :products do |products_builder| %> <%= render :partial => "products/form", :locals => {:f => products_builder, :form_actions_visible => false} %> <% end -%> I could nest a Product_sale form within the product form, but this would create a new product_sale, which is not what I am looking for. I will most likely need to nest the price field within the product form, to ensure that it updates the correct assignment record (since there could be multiple products on one sale form). How can I use a fields_for loop on the product form to update the existing assignment record that is built when I do @sale.products.build? The assignment record will not yet be saved, so I can not access it using a where clause and edit it that way. Thanks!

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  • SQL Server: Why use shorter VARCHAR(n) fields?

    - by chryss
    It is frequently advised to choose database field sizes to be as narrow as possible. I am wondering to what degree this applies to SQL Server 2005 VARCHAR columns: Storing 10-letter English words in a VARCHAR(255) field will not take up more storage than in a VARCHAR(10) field. Are there other reasons to restrict the size of VARCHAR fields to stick as closely as possible to the size of the data? I'm thinking of Performance: Is there an advantage to using a smaller n when selecting, filtering and sorting on the data? Memory, including on the application side (C++)? Style/validation: How important do you consider restricting colunm size to force non-sensical data imports to fail (such as 200-character surnames)? Anything else? Background: I help data integrators with the design of data flows into a database-backed system. They have to use an API that restricts their choice of data types. For character data, only VARCHAR(n) with n <= 255 is available; CHAR, NCHAR, NVARCHAR and TEXT are not. We're trying to lay down some "good practices" rules, and the question has come up if there is a real detriment to using VARCHAR(255) even for data where real maximum sizes will never exceed 30 bytes or so. Typical data volumes for one table are 1-10 Mio records with up to 150 attributes. Query performance (SELECT, with frequently extensive WHERE clauses) and application-side retrieval performance are paramount.

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  • addSubview insertSubview aboveSubview bit confused as to why it does not work

    - by John Smith
    I'm a bit confused all as to why the belowSubview does not work. I'm adding some (subviews) to my navigationController and all of that works well. -(UITableView *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { ... ... [self.navigationController.view addSubview:ImageView]; [self.navigationController.view addSubview:toolbar]; add some point in my app I wish to add another toolbar or image above my toolbar. so let's say I'm doing something like this -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { ... ... [self.navigationController.view insertSubview:NewImageView aboveSubview:toolbar]; //crucial of course [edit] rvController = [RootViewController alloc] initWithNibName:@"RootViewController" bundle:[NSBundle] mainBundle]; rvController.CurrentLevel += 1; rvController.CurrentTitle = [dictionary objectForKey:@"Title"]; [self.navigationController pushViewController:rvController animated:YES]; rvController.tableDataSource = Children; [rvController release]; However this doesn't work.. Does anyone know what I'm doing wrong here ... Should I have used something else instead of addSubview or is the problem somewhere else?

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  • Sharepoint list fields stored in content database?

    - by nav
    Hi, I am trying to find out where data for Sharepoint list fields are stored in the content database. For example from the AllLists table filtering on the listid i am intrested in I can derive the following from the tp_ContentTypes column on the field I'm interested in: <Field Type="CascadingDropDownListFieldWithFilter" DisplayName="Secondary Subject" Required="FALSE" ID="{b4143ff9-d5a4-468f-8793-7bb2f06b02a0}" SourceID="{6c1e9bbf-4f02-49fd-8e6c-87dd9f26158a}" StaticName="Secondary_x0020_Subject" Name="Secondary_x0020_Subject" ColName="nvarchar13" RowOrdinal="0" Version="1"><Customization><ArrayOfProperty><Property><Name>SiteUrl</Name><Value xmlns:q1="http://www.w3.org/2001/XMLSchema" p4:type="q1:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">http://lvis.amberlnk.net/knowhow</Value></Property><Property><Name>CddlName</Name><Value xmlns:q2="http://www.w3.org/2001/XMLSchema" p4:type="q2:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">SS</Value></Property><Property><Name>CddlParentName</Name><Value xmlns:q3="http://www.w3.org/2001/XMLSchema" p4:type="q3:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">PS</Value></Property><Property><Name>CddlChildName</Name><Value xmlns:q4="http://www.w3.org/2001/XMLSchema" p4:type="q4:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance"/></Property><Property><Name>ListName</Name><Value xmlns:q5="http://www.w3.org/2001/XMLSchema" p4:type="q5:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Secondary</Value></Property><Property><Name>ListTextField</Name><Value xmlns:q6="http://www.w3.org/2001/XMLSchema" p4:type="q6:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Title</Value></Property><Property><Name>ListValueField</Name><Value xmlns:q7="http://www.w3.org/2001/XMLSchema" p4:type="q7:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Title</Value></Property><Property><Name>JoinField</Name><Value xmlns:q8="http://www.w3.org/2001/XMLSchema" p4:type="q8:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Primary</Value></Property><Property><Name>FilterField</Name><Value xmlns:q9="http://www.w3.org/2001/XMLSchema" p4:type="q9:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Content Type ID</Value></Property><Property><Name>FilterOperator</Name><Value xmlns:q10="http://www.w3.org/2001/XMLSchema" p4:type="q10:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance">Show All</Value></Property><Property><Name>FilterValue</Name><Value xmlns:q11="http://www.w3.org/2001/XMLSchema" p4:type="q11:string" xmlns:p4="http://www.w3.org/2001/XMLSchema-instance"/></Property></ArrayOfProperty></Customization></Field> Which table do I need to query to find the data held on this field? Many Thanks Nav

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  • Append indexed input fields with attached datepicker widget

    - by Micor
    I am looking for the most efficient way to add a set of fields with datepicker widget attached on click event. So here I have a set of indexed events being generated on a page: <div id="events"> <div class="event"> <input type="text" id="event_0_startDate" name="event[0].startDate" class="date"/> <input type="hidden" id="event_0_startDate_day" name="event[0].startDate_day" /> <input type="hidden" id="event_0_startDate_month" name="event[0].startDate_month" /> <input type="hidden" id="event_0_startDate_year" name="event[0].startDate_year"/> </div> <div class="event"> <input type="text" id="event_1_startDate" name="event[1].startDate" class="date"/> <input type="hidden" id="event_1_startDate_day" name="event[1].startDate_day" /> <input type="hidden" id="event_1_startDate_month" name="event[1].startDate_month" /> <input type="hidden" id="event_1_startDate_year" name="event[1].startDate_year" /> </div> .... more event divs .... </div> <a href="#" id="add_event">Add event</a> .. with datepicker widget attached: $(".date").datepicker({ onClose: function(dateText,picker) { var prefix = $(this).attr('id'); $('#' + prefix + '_month').val( dateText.split(/\//)[0] ); $('#' + prefix + '_day').val( dateText.split(/\//)[1] ); $('#' + prefix + '_year').val( dateText.split(/\//)[2] ); } }); I need a function that will add inside div id="events" after the last div class="event" another div class="event" where N is the next index and attach datepicker widget above to the new input field with class="date" like: <div class="event"> <input type="text" id="event_N_startDate" name="event[N].startDate" class="date"/> <input type="hidden" id="event_N_startDate_day" name="event[N].startDate_day"/> <input type="hidden" id="event_N_startDate_month" name="event[N].startDate_month" /> <input type="hidden" id="event_N_startDate_year" name="event[N].startDate_year" /> </div> Thank you.

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  • Windows 7 64 Bit - ODBC32 - Legacy App Problem

    - by Arturo Caballero
    Good day StackOverFlowlers, I´m a little stuck (really stuck) with an issue with a legacy application on my organization. I have a Windows 7 Enterprise 64 Bit machine, Access 2000 Installed and the Legacy App (Is built with something like VB but older) The App uses System ODBC in order to connect to a SQL 2000 DataBase on a Remote Server. I created the ODCB using C:\Windows\SysWOW64\odbcad32.exe app in order to create a System DSN. I did not use the Windows 7 because it is not visible to the Legacy App. I tested the ODBC connection with Access and worked ok, I can access the remote database. Then I run the legacy App as Administrator and the App can see the ODBC, but I´m getting errors on credential validation and I´m getting this error: DIAG [08001] [Microsoft][ODBC SQL Server Driver][Multi-Protocol]SQL Server does not exist or access denied. (17) DIAG [01000] [Microsoft][ODBC SQL Server Driver][Multi-Protocol]ConnectionOpen (Connect()). (53) DIAG [IM006] [Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed (0) I use Trusted Connection on the ODBC in order to validate the user by Domain Controller. I think that the credentials are not being sent by the Legacy App to the ODBC, or something like that. I don´t have the source code of the Legacy App in order to debug the connection. Also, I turned off the Firewall. Any ideas?? Thanks in advance!

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  • Accessing an object's fields without an active session

    - by Dave
    I'm using Hibernate 4.0.1.Final. Is it possible to access an object's fields if that object has been loaded via the org.hibernate.Session.load(Class clazz, Serializable id) method and there is no active session? I use this code to access an object by id … protected Object find(Class clazz, Serializable id) { Object obj = null; try { startOperation(); obj = session.load(clazz, id); tx.commit(); } catch (HibernateException e) { handleException(e); } finally { session.close(); } return obj; } but if I have that object without an active session, like with this code … final Organization foundOrg = orgDao.findById(org.getOrganizationId()); System.out.println(foundOrg.getName()); I get this error on the "System.out" line … org.hibernate.LazyInitializationException: could not initialize proxy - no Session at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:149) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:195) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) at org.myco.myproject.orgsclient.model.Organization_$$_javassist_0.getName(Organization_$$_javassist_0.java) at org.myco.myproject.orgsclient.dao.OrganizationDAOTest.testInsertSchool(OrganizationDAOTest.java:43) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

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  • C# TCP Async EndReceive() throws InvalidOperationException ONLY on Windows XP 32-bit

    - by James Farmer
    I have a simple C# Async Client using a .NET socket that waits for timed messages from a local Java server used for automating commands. The messages come in asynchronously and is written to a ring buffer. This implementation seems to work fine on Windows Vista/7/8 and OSX, but will randomly throw this exception while it's receiving a message from the local Java server: Unhandled Exception: System.InvalidOperationException: EndReceive can only be called once for each asynchronous operation.     at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult, SocketError& errorCode)     at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)     at SocketTest.Controller.RecvAsyncCallback(IAsyncResult ar)     at System.Net.LazyAsyncResult.Complete(IntPtr userToken)     ... I've looked online for this error, but have found nothing really helpful. This is the code where it seems to break: /// <summary> /// Callback to receive socket data /// </summary> /// <param name="ar">AsyncResult to pass to End</param> private void RecvAsyncCallback(IAsyncResult ar) { // The exception will randomly happen on this call int bytes = _socket.EndReceive(_recvAsyncResult); // check for connection closed if (bytes == 0) { return; } _ringBuffer.Write(_buffer, 0, bytes); // Checks buffer CheckBuffer(); _recvAsyncResult = _sock.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, RecvAsyncCallback, null); } The error doesn't happen on any particular moment except in the middle of receiving a message. The message itself can be any length for this to happen, and the exception can happen right away, or sometimes even up to a minute of perfect communication. I'm pretty new with sockets and network communication, and I feel I might be missing something here. I've tested on at least 8 different computers, and the only similarity with the computers that throw this exception is that their OS is Windows XP 32-bit.

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  • 32 bit depth jpg images problem in IE when referenced locally

    - by Stefan
    We have an webbapplication that takes an image that will be uploaded and resized. The resize-library we used saved all pictures with 32-bit depth whatever the depth was before. We have an online client that can view the pictures via an html-file and all is fine there. All pictures are shown correctly. The problem: We also have an vb-winform application that download the pictures and show them in an html-file locally in an webbrowser control. But here all pictures are rejected (not rendered), just the red cross. If we create an static html-file with img-tags in them locally, its the same. All pictures that has 32-bits depth are shown as red crosses. If we resave the pictures with 24-bits depth it magically works again. So ofcourse that was our "workaround", let the resize-library save all pictures with 24-bits depth instead. Summary: 32-bits jpg files shows correct in IE when online but not when referenced locally in a local html-file. (This is true for IE8 on both winxp and windows7). The same local html-file opened in mozilla showed OK. Question: I have googled this a lot but has not found anything about this "problem". Is this a bug in IE8?

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  • One position right barrel shift using ALU Operators?

    - by Tomek
    I was wondering if there was an efficient way to perform a shift right on an 8 bit binary value using only ALU Operators (NOT, OR, AND, XOR, ADD, SUB) Example: input: 00110101 output: 10011010 I have been able to implement a shift left by just adding the 8 bit binary value with itself since a shift left is equivalent to multiplying by 2. However, I can't think of a way to do this for shift right. The only method I have come up with so far is to just perform 7 left barrel shifts. Is this the only way?

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  • Java Nimbus LAF with transparent text fields

    - by Software Monkey
    I have an application that uses disabled JTextFields in several places which are intended to be transparent - allowing the background to show through instead of the text field's normal background. When running the new Nimbus LAF these fields are opaque (despite setting setOpaque(false)), and my UI is broken. It's as if the LAF is ignoring the opaque property. Setting a background color explicitly is both difficult in several places, and less than optimal due to background images actually doesn't work - it still paints it's LAF default background over the top, leaving a border-like appearance (the splash screen below has the background explicitly set to match the image). Any ideas on how I can get Nimbus to not paint the background for a JTextField? Note: I need a JTextField, rather than a JLabel, because I need the thread-safe setText(), and wrapping capability. Note: My fallback position is to continue using the system LAF, but Nimbus does look substantially better. See example images below. Conclusions The surprise at this behavior is due to a misinterpretation of what setOpaque() is meant to do - from the Nimbus bug report: This is a problem the the orginal design of Swing and how it has been confusing for years. The issue is setOpaque(false) has had a side effect in exiting LAFs which is that of hiding the background which is not really what it is ment for. It is ment to say that the component my have transparent parts and swing should paint the parent component behind it. It's unfortunate that the Nimbus components also appear not to honor setBackground(null) which would otherwise be the recommended way to stop the background painting. Setting a fully transparent background seems unintuitive to me. In my opinion, setOpaque()/isOpaque() is a faulty public API choice which should have been only: public boolean isFullyOpaque(); I say this, because isOpaque()==true is a contract with Swing that the component subclass will take responsibility for painting it's entire background - which means the parent can skip painting that region if it wants (which is an important performance enhancement). Something external cannot directly change this contract (legitimately), whose fulfillment may be coded into the component. So the opacity of the component should not have been settable using setOpaque(). Instead something like setBackground(null) should cause many components to "no long have a background" and therefore become not fully opaque. By way of example, in an ideal world most components should have an isOpaque() that looks like this: public boolean isOpaque() { return (background!=null); }

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  • How can I highlight empty fields in ASP.NET MVC 2 before model binding has occurred?

    - by Richard Poole
    I'm trying to highlight certain form fields (let's call them important fields) when they're empty. In essence, they should behave a bit like required fields, but they should be highlighted if they are empty when the user first GETs the form, before POST & model validation has occurred. The user can also ignore the warnings and submit the form when these fields are empty (i.e. empty important fields won't cause ModelState.IsValid to be false). Ideally it needs to work server-side (empty important fields are highlighted with warning message on GET) and client-side (highlighted if empty when losing focus). I've thought of a few ways of doing this, but I'm hoping some bright spark can come up with a nice elegant solution... Just use a CSS class to flag important fields Update every view/template to render important fields with an important CSS class. Write some jQuery to highlight empty important fields when the DOM is ready and hook their blur events so highlights & warning messages can be shown/hidden as appropriate. Pros: Quick and easy. Cons: Unnecessary duplication of importance flags and warning messages across views & templates. Clients with JavaScript disabled will never see highlights/warnings. Custom data annotation and client-side validator Create classes similar to RequiredAttribute, RequiredAttributeAdapter and ModelClientValidationRequiredRule, and register the adapter with DataAnnotationsModelValidatorProvider.RegisterAdapter. Create a client-side validator like this that responds to the blur event. Pros: Data annotation follows DRY principle (Html.ValidationMessageFor<T> picks up field importance and warning message from attribute, no duplication). Cons: Must call TryValidateModel from GET actions to ensure empty fields are decorated. Not technically validation (client- & server-side rules don't match) so it's at the mercy of framework changes. Clients with JavaScript disabled will never see highlights/warnings. Clone the entire validation framework It strikes me that I'm trying to achieve exactly the same thing as validation but with warnings rather than errors. It needs to run before model binding (and therefore validation) has occurred. Perhaps it's worth designing a similar framework with annotations like Required, RegularExpression, StringLength, etc. that somehow cause Html.TextBoxFor<T> etc. to render the warning CSS class and Html.ValidationMessageFor<T> to emit the warning message and JSON needed to enable client-side blur checks. Pros: Sounds like something MVC 2 could do with out of the box. Cons: Way too much effort for my current requirement! I'm swaying towards option 1. Can anyone think of a better solution?

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  • Populating fields in modal form using PHP, jQuery

    - by Benjamin
    I have a form that adds links to a database, deletes them, and -- soon -- allows the user to edit details. I am using jQuery and Ajax heavily on this project and would like to keep all control in the same page. In the past, to handle editing something like details about another website (link entry), I would have sent the user to another PHP page with form fields populated with PHP from a MySQL database table. How do I accomplish this using a jQuery UI modal form and calling the details individually for that particular entry? Here is what I have so far- <?php while ($linkDetails = mysql_fetch_assoc($getLinks)) {?> <div class="linkBox ui-corner-all" id="linkID<?php echo $linkDetails['id'];?>"> <div class="linkHeader"><?php echo $linkDetails['title'];?></div> <div class="linkDescription"><p><?php echo $linkDetails['description'];?></p> <p><strong>Link:</strong><br/> <span class="link"><a href="<?php echo $linkDetails['url'];?>" target="_blank"><?php echo $linkDetails['url'];?></a></span></p></div> <p align="right"> <span class="control"> <span class="delete addButton ui-state-default">Delete</span> <span class="edit addButton ui-state-default">Edit</span> </span> </p> </div> <?php }?> And here is the jQuery that I am using to delete entries- $(".delete").click(function() { var parent = $(this).closest('div'); var id = parent.attr('id'); $("#delete-confirm").dialog({ resizable: false, modal: true, title: 'Delete Link?', buttons: { 'Delete': function() { var dataString = 'id='+ id ; $.ajax({ type: "POST", url: "../includes/forms/delete_link.php", data: dataString, cache: false, success: function() { parent.fadeOut('slow'); $("#delete-confirm").dialog('close'); } }); }, Cancel: function() { $(this).dialog('close'); } } }); return false; }); Everything is working just fine, just need to find a solution to edit. Thanks!

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  • dynamic check_box using field_for in rails

    - by Craig Whitley
    I have a many-to-many relationship with a link box, and I want to pull those models together into one form so I can update from the same page. I'm really struggling with getting the check_box to even show all the elements of my array - I've scoured the net and been working on this literally all day, and I'm finding it difficult to apply the information I'm reading to my problem. I'm also extremely new to RoR and I've been following a bit of an outdated video tutorial (pre 2.0) so apologies for my code. So far, I've got it to output only one key pair in the array (the last one) - although outside the form, the code used in the tutorial works exactly how it should. Thats of little use though! Host is the model for which the main form is for, and Billing is the outside model that I'm trying to add to the form. This is the code that works outside of the form from the tutorial: <% for billing in @billings -%> <%= check_box_tag('billing_title[]', billing.id, @host.billings.collect {|obj| obj.id}.include?(billing.id))%> <%= billing.title %><br /> <% end -%> I just need to know how to make it work inside the form. This is the aforementioned code that only retrieves the last array keypair after looping through them: <% f.fields_for :billings do |obj| %><br /> <%= check_box_tag('billing_title[]', billing.id, @billings.collect {|obj| obj.id}.include?(billing.id))%> <%= billing.title %><br /> <% end %> The debug(@billings) : --- - !ruby/object:Billing attributes: title: Every Month id: "1" attributes_cache: {} - !ruby/object:Billing attributes: title: 12 Months id: "2" attributes_cache: {} - !ruby/object:Billing attributes: title: 6 Months id: "5" attributes_cache: {} Any help really appreciated.

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  • Trimming bit of the beginning off a recorder waveform

    - by Lowgain
    I've got a flash 10.1 app that lets me record microphone input to a wav without a media server, which I am saving to an Amazon S3 bucket. I have another process running on a server which gets wavs from this bucket, converts to mp3 using LAME and puts them into another bucket. This all works fine, but in converting wav mp3, about 0.1sec or so of silence is added to my sound. In the application this are being used in, perfect sync is critical, so I need to trim off that little bit. If I have to trim it off the original waveform that is okay, I don't expect anything important to happen in that first fraction of a second. What is the best way to go about this? I am using Adobe's WavWriter to convert by ByteArray into a proper waveform. Is there a way I can easily trim off the first few samples from my ByteArray without invalidating the structure? Alternatively, is there a good server-side tool I can use to trim the wav before running it through LAME, or an argument I can give LAME? Or, could I even trim that sound off the mp3 after it has been converted? Thanks!

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  • java.util.BitSet -- set() doesn't work as expected

    - by dwhsix
    Am I missing something painfully obvious? Or does just nobody in the world actually use java.util.BitSet? The following test fails: @Test public void testBitSet() throws Exception { BitSet b = new BitSet(); b.set(0, true); b.set(1, false); assertEquals(2, b.length()); } It's really unclear to me why I don't end up with a BitSet of length 2 and the value 10. I peeked at the source for java.util.BitSet, and on casual inspection it seems to fail to make sufficient distinction between a bit that's been set false and a bit that has never been set to any value... (Note that explicitly setting the size of the BitSet in the constructor has no effect, e.g.: BitSet b = new BitSet(2);

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