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• Does changing the order of class private data members breaks ABI

  - by Dmitry Yudakov

  I have a class with number of private data members (some of them static), accessed by virtual and non-virtual member functions. There's no inline functions and no friend classes. class A { int number; string str; static const int static_const_number; public: // got virtual and non-virtual functions, working with these memebers virtual void func1(); void func2(); // no inline functions or friends }; Does changing the order of private data members breaks ABI in this case? class A { string str; static const int static_const_number; int number; // <-- integer member moved here ... };

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• I need a groovy criteria to get all the elements after i make sort on nullable inner object

  - by user1773876

  I have two domain classes named IpPatient,Ward as shown below. class IpPatient { String ipRegNo Ward ward static constraints = { ward nullable:true ipRegNo nullable:false } } class Ward { String name; static constraints = { name nullable:true } } now i would like to create criteria like def criteria=IpPatient.createCriteria() return criteria.list(max:max , offset:offset) { order("ward.name","asc") createAlias('ward', 'ward', CriteriaSpecification.LEFT_JOIN) } At present IpPatient table has 13 records, where 8 records of IpPatient doesn't have ward because ward can be null. when i sort with wardName i am getting 5 records those contain ward. I need a criteria to get all the elements after i make sort on nullable inner object.

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• Base64 Android encode to PHP decode make error

  - by studio lambda

  I'm a french guy, so, I'm sorry for my english... I'm developing an Android App which communicate with a PHP REST service. So, when I try to encode an image file into Base64 like this : InputStream fileInputStream = context.getContentResolver().openInputStream(uri); BufferedInputStream in = new BufferedInputStream(fileInputStream); StringWriter out = new StringWriter(); int b; while ((b = in.read()) != -1) out.write(b); out.flush(); out.close(); in.close(); String encoded = new String(android.util.Base64.encode(out.toString() .getBytes(), android.util.Base64.DEFAULT)); On server side, I make : $data=base64_decode(chunk_split($base64BinaryData)); The result is that my image file is corrupted! INFO : the image is made by an Intent to android.provider.MediaStore.ACTION_IMAGE_CAPTURE Activity in Emulator mode (avd 5554) I've already read lots of discussions about similar problem but nothing fix my bug. thanks for help Regards,

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• How to display unique success messages on jquery form validation

  - by mastah

  Hi guys, hope you can help me on this one, I'm currently using this: jQuery plugin:validation (Homepage) I've been reading related questions here, but this one is the closest get. http://stackoverflow.com/questions/1863448/jquery-validation-on-success from the plugin's documentation http://docs.jquery.com/Plugins/Validation/validate#toption success String, Callback If specified, the error label is displayed to show a valid element. If a String is given, its added as a class to the label. If a Function is given, its called with the label (as a jQuery object) as its only argument. That can be used to add a text like "ok!". Currently I'm only object given to me is the label, and I can only add text to it. Now what I want is to have unique success message. For example: username field will have a success message: 'username okay!' email = 'email seems right' something along those lines, instead of displaying just one generic success message on all the fields. Thanks in advanced :)

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• HQL query for entity with max value

  - by Rob

  I have a Hibernate entity that looks like this (accessors ommitted for brevity): @Entity @Table(name="FeatureList_Version") @SecondaryTable(name="FeatureList", pkJoinColumns=@PrimaryKeyJoinColumn(name="FeatureList_Key")) public class FeatureList implements Serializable { @Id @Column(name="FeatureList_Version_Key") private String key; @Column(name="Name",table="FeatureList") private String name; @Column(name="VERSION") private Integer version; } I want to craft an HQL query that retrieves the most up to date version of a FeatureList. The following query sort of works: Select f.name, max(f.version) from FeatureList f group by f.name The trouble is that won't populate the key field, which I need to contain the key of the record with the highest version number for the given FeatureList. If I add f.key in the select it won't work because it's not in the group by or an aggregate and if I put it in the group by the whole thing stops working and it just gives me every version as a separate entity. So, can anybody help?

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• DataTable C# Empty column type

  - by Dested

  I am trying build a DataTable one row at a time using the following code. foreach (var e in Project.ProjectElements[hi.FakeName].Root.Elements()) { index = 0; object[] obj=new object[count]; foreach (var holdingColumn in names) { string d = e.Attribute(holdingColumn.Key).Value; obj[index++] = d; } dt.Rows.Add(obj); } The problem is the DataTable has types tied to the columns. Sometimes im passing null (or an empty string) in that object index and it is telling me that it cant be converted properly to a DateTime (in this case). My question is what should I default this value to, or is there some way to have the DataTable ignore empty values.

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• Finite State Machine Spellchecker

  - by Durell

  I would love to have a debugged copy of the finite state machine code below. I tried debugging but could not, all the machine has to do is to spell check the word "and",an equivalent program using case is welcomed. #include<cstdlib> #include<stdio.h> #include<string.h> #include<iostream> #include<string> using namespace std; char in_str; int n; void spell_check() { char data[256]; int i; FILE *in_file; in_file=fopen("C:\\Users\\mytorinna\\Desktop\\a.txt","r+"); while (!feof(in_file)) { for(i=0;i<256;i++) { fscanf(in_file,"%c",in_str); data[i]=in_str; } //n = strlen(in_str); //start(data); cout<<data; } } void start(char data) { // char next_char; //int i = 0; // for(i=0;i<256;i++) // if (n == 0) { if(data[i]="a") { state_A(); exit; } else { cout<<"I am comming"; } // cout<<"This is an empty string"; // exit();//do something here to terminate the program } } void state_A(int i) { if(in_str[i] == 'n') { i++; if(i<n) state_AN(i); else error(); } else error(); } void state_AN(int i) { if(in_str[i] == 'd') { if(i == n-1) cout<<" Your keyword spelling is correct"; else cout<<"Wrong keyword spelling"; } } int main() { spell_check(); system("pause"); return 0; }

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• Expand a class instance within a class instance in PropertryGrid

  - by Dmi

  In C#, I have a class set up like so: class Page { public class Element { private string test; public string Test { get { return test; } set { test = value; } } } private Element element; public Element PrimaryElement { get { return element; } set { element = value; } } } If I have a PropertyGrid where the select object is an instance of Page, how can I modify Test in its member PrimaryElement from the PropertyGrid? It shows up in grey and is not expandable nor editable.

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• FxCop giving a warning on private constructor CA1823 and CA1053

  - by Luis Sánchez

  I have a class that looks like the following: Public Class Utilities Public Shared Function blah(userCode As String) As String 'doing some stuff End Function End Class I'm running FxCop 10 on it and it says: "Because type 'Utilities' contains only 'static' ( 'Shared' in Visual Basic) members, add a default private constructor to prevent the compiler from adding a default public constructor." Ok, you're right Mr. FxCop, I'll add a private constructor: Private Utilities() Now I'm having: "It appears that field 'Utilities.Utilities' is never used or is only ever assigned to. Use this field or remove it." Any ideas of what should I do to get rid of both warnings?

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• extjs datefield iso format?

  - by Scott

  What is the correct format string for an ext date field of the following kind: 2010-06-22T17:00:00 Thanks

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• Constructor Injection and when to use a Service Locator

  - by Simon

  I'm struggling to understand parts of StructureMap's usage. In particular, in the documentation a statement is made regarding a common anti-pattern, the use of StructureMap as a Service Locator only instead of constructor injection (code samples straight from Structuremap documentation): public ShippingScreenPresenter() { _service = ObjectFactory.GetInstance<IShippingService>(); _repository = ObjectFactory.GetInstance<IRepository>(); } instead of: public ShippingScreenPresenter(IShippingService service, IRepository repository) { _service = service; _repository = repository; } This is fine for a very short object graph, but when dealing with objects many levels deep, does this imply that you should pass down all the dependencies required by the deeper objects right from the top? Surely this breaks encapsulation and exposes too much information about the implementation of deeper objects. Let's say I'm using the Active Record pattern, so my record needs access to a data repository to be able to save and load itself. If this record is loaded inside an object, does that object call ObjectFactory.CreateInstance() and pass it into the active record's constructor? What if that object is inside another object. Does it take the IRepository in as its own parameter from further up? That would expose to the parent object the fact that we're access the data repository at this point, something the outer object probably shouldn't know. public class OuterClass { public OuterClass(IRepository repository) { // Why should I know that ThingThatNeedsRecord needs a repository? // that smells like exposed implementation to me, especially since // ThingThatNeedsRecord doesn't use the repo itself, but passes it // to the record. // Also where do I create repository? Have to instantiate it somewhere // up the chain of objects ThingThatNeedsRecord thing = new ThingThatNeedsRecord(repository); thing.GetAnswer("question"); } } public class ThingThatNeedsRecord { public ThingThatNeedsRecord(IRepository repository) { this.repository = repository; } public string GetAnswer(string someParam) { // create activeRecord(s) and process, returning some result // part of which contains: ActiveRecord record = new ActiveRecord(repository, key); } private IRepository repository; } public class ActiveRecord { public ActiveRecord(IRepository repository) { this.repository = repository; } public ActiveRecord(IRepository repository, int primaryKey); { this.repositry = repository; Load(primaryKey); } public void Save(); private void Load(int primaryKey) { this.primaryKey = primaryKey; // access the database via the repository and set someData } private IRepository repository; private int primaryKey; private string someData; } Any thoughts would be appreciated. Simon

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• Display multiple new windows

  - by Ricardo Deano

  Afternoon all. I have the following scenario: I have a search page where by a client searches for a product from a drop down list, upon clicking a button, a gridview is produced display the spec. What I would like is the functionality for the user to make their selection and a new window pops up with the spec. So I have a simple code behind for the search page: protected void Button1_Click(object sender, EventArgs e) { Session["Product"] = DropDownList1.SelectedValue; string strScript = "window.open('GridViewPage.aspx', 'Key', 'height=500,width=800,toolbar=no,menubar=no,scrollbars=yes,resizable=yes,titlebar=no');"; ScriptManager.RegisterStartupScript(this, typeof(string), "", strScript, true); } And a gridviewpage that presents the data based upon the session created in the search page: <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataSourceID="LinqDataSource1"> <Columns> <asp:BoundField DataField="Product" HeaderText="MemberID" SortExpression="MemberID" /> <asp:BoundField DataField="Spec" HeaderText="Spec" SortExpression="Spec" /> </Columns> </asp:GridView> <asp:LinqDataSource ID="LinqDataSource1" runat="server" ContextTypeName="GridViewInNewWindow.ProductDataContext" EntityTypeName="" TableName="tblProducts" Where="Product == @Product"> <WhereParameters> <asp:SessionParameter Name="Product" SessionField="Product" Type="String" /> </WhereParameters> </asp:LinqDataSource> Now upon first iteration, this does the job...gridview presented in new window...hurrah! i.e. a user searches for egg, the spec for an egg is presented in a new window. However, what I would like to happen is that the user can make multiple searches so a number of new windows are opened. i.e. a user searches for egg once, the spec is returned in a new window; they then wish to see the spec for a chicken, so they use the search page to find said chicken, click the button and another new window is shown displaying the chicken's specs. Does anyone know how I can achieve this? Apologies if this is simple stuff, I am just finding my feet.

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• Need help using the Windows IP Helper API & ParseNetworString in C#.

  - by JohnnyNoir

  I'm attempting to rewrite some C# web service code that uses the Windows IP Helper API call "SendARP" to retreive a remote system's MAC address. SendARP works great - until you cross a network segment as Arp requests aren't routed. I've been looking at the "ParseNetworkString" documentation after happening across its existance on StackOverflow. The quick & dirty algorithm I have in mind is: public static string GetMacAddress(string strHostOrIP) { if (strHostOrIP is IPAddress) { parse results of nbstat -A strHostOrIP return macAddress } if (strHostOrIP is Hostname) { IPHostEntry hostEntry = null; try { hostEntry = Dns.GetHostEntry(strHostOrIP); } catch { return null; } if (hostEntry.AddressList.Length == 0) { return null; } foreach (IPAddress ip in hostEntry.AddressList) { if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) { ipAddress = ip; break; } } } return GetMACAddress(ipAddress); } "ParseNetworkString" is new with Vista/Win2008 so I haven't been able to find example C# code demonstrating its use and I'm no C++ coder so if anyone can point me in the right direction...

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• Why does this IF statement fail?

  - by ChosenOne

  If variable path is empty, and editor.Text is not empty, the SaveFileDialog should be displayed. Now, why on earth is this damn thing failing??? I have tried this with many different variations of code with the same result: FAIL: if(path.Length >= 1) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } At the top of code file I have: path = String.Empty; So why the heck it this failing every single time, even after trying all of the below variations? if(path.Length > 1) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } and if(String.IsNullOrEmpty(path)) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } and if(String.IsNullOrWhiteSpace(path)) // path contains a path. Save changes instead of creating NEW file. { File.WriteAllText(path, content); } else { // no path defined. Create new file and write to it. using(SaveFileDialog saver = new SaveFileDialog()) { if(saver.ShowDialog() == DialogButtons.OK) { File.WriteAllText(saver.Filename, content); } } } This is making me very angry. How could this fail? Setting a break point reveals that path is definitely null/"".

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• how subsonic SP should return a value

  - by android.sm

  Hi all, I'm very much new to SubSonic and need a little guidance. Here, I want to know how my SP should return a value. Currently, when I execute it I simply pass an Int and it returns me a string value. Here is code: SubSonic SP: public static StoredProcedure GetQuote(int? CategoryId) { StoredProcedure sp = new StoredProcedure("GetQuote", DataService.GetInstance("Quotes Provider"), "dbo"); sp.Command.AddParameter("@CategoryId", CategoryId, DbType.Int32, 0, 10); return sp; } My Code: public bool GetQuote(int category, out string quote) { bool val = false; quote = ""; try { StoredProcedure sp = SPs.GetQuote(category); if (sp != null) { sp.Execute(); val = true; } } catch (Exception err) { throw err; } return val; } Thanks all

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• Display PDF in Html

  - by anil

  Hi, i want to show PDF in a view in MVC, following function return file public ActionResult TakeoffPlans(string projID) { Highmark.BLL.Models.Project proj = GetProject(projID); List ff = proj.GetFiles(Project_Thin.Folders.CompletedTakeoff, false); ViewData["HasFile"] = "0"; if (ff != null && ff.Count 0 && ff.Where(p = p.FileExtension == "pdf").Count() 0) { ViewData["HasFile"] = "1"; } ViewData["ProjectID"] = projID; ViewData["Folder"] = Project_Thin.Folders.CompletedTakeoff; //return View("UcRenderPDF"); string fileName = Server.MapPath("~/Content/Project List Update 2.pdf"); return File(fileName, "application/pdf", Server.HtmlEncode(fileName)); } but it display some bad data in view, please help me on this

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• Date format strings in .Net and Java

  - by mizipzor

  I have an application that runs on both C# .Net and Java. Two entirely separate but identical code bases. The problem Im having is formatting date and numbers. For example: A user running the .Net variant is inputting a date and a format string. The 26th of April 1986 is formatted 1986-04-26. The actual date, along with the format string, is serialized to an XML file. Later another user running the Java variant opens said XML file and looks at the date. I want them to look the same. Whats the best approach here? There doesnt seem to be a one-to-one mapping between Java and .Nets format strings. Should I limit the possible formats to a selection I know I can represent fully in both .Net and Java?

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• How to count occurrence of an element in a List

  - by MM

  I have an ArrayList a collection class of java as follows. ArrayList<String>animals = new ArrayList<String>(); animals.add("bat"); animals.add("owl"); animals.add("bat"); animals.add("bat"); As you can see the animals ArrayList consists of 3 bat elements and one owl element. I was wondering if there is any API in collection framework that returns the number of bat occurrences or is there a way to determine number of occurrences. I found that google's collection multiset does have an api that returns total number of occurrences of an element. But that is compatible only with jdk1.5. Our product is currently in jdk 1.6. Hence cannot use it.

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• Displaying the Time in AM/PM format in android

  - by Rahul Varma

  Hi, I am getting the time using a time picker and displaying the time in the text view using following code... private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { Toast.makeText(SendMail.this, "Your Appointment time is "+hourOfDay+":"+minute, Toast.LENGTH_SHORT).show(); TextView datehid = (TextView)findViewById(R.id.timehidden); datehid.setText(String.valueOf(hourOfDay)+ ":"+(String.valueOf(minute))); } }; Now, the issue is when i set the time as 8:00 pm then i get the time displayed as 20:0... I want to display the time as 8:00 pm... How can i do that???

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• GEM Version Requirements Deprecated

  - by Kevin Sylvestre

  When creating a new Rails project using: rails sample Then creating a model using: script/generate model person first_name:string last_name:string Everything is fine. However, if I add any gems to my environment.rb: config.gem "authlogic" And run the same generator, I get the following: /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. The warning just recently appeared (I think), but I would like to fix it if possible. Any hints or similar experiences? Thanks.

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• Building a formset dynamically

  - by vorpyg

  I initially wrote code to build a form dynamically, based on data from the DB, similar to what I described in my previous SO post. As SO user Daniel Roseman points out, he would use a formset for this, and now I've come to the realization that he must be completely right. :) My approach works, basically, but I can't seem to get validation across the entire form to be working properly (I believe it's possible, but it's getting quite complex, and there has to be a smarter way of doing it = Formsets!). So now my question is: How can I build a formset dynamically? Not in an AJAX way, I want each form's label to be populated with an FK value (team) from the DB. As I have a need for passing parameters to the form, I've used this technique from a previous SO post. With the former approach, my view code is (form code in previous link): def render_form(request): teams = Team.objects.filter(game=game) form_collection = [] for team in teams: f = SuggestionForm(request.POST or None, team=team, user=request.user) form_collection.append(f) Now I want to do something like: def render_form(request): teams = Team.objects.filter(game=game) from django.utils.functional import curry from django.forms.formsets import formset_factory formset = formset_factory(SuggestionForm) for team in teams: formset.form.append(staticmethod(curry(SuggestionForm, request.POST or None, team=team, user=request.user))) But the append bit doesn't work. What's the proper way of doing this? Thanks!

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• How Do I Convert text to a WAV file With Inaudible Waveform?

  - by Scott

  I am trying to create an audio watermarking system. I figure the best solution is to create an audio file (WAV) based on a unique string of text and then combine this with the original wav. The part that makes this tricky (for me anyway) is: How do I convert the text string to a wav? How do I ensure that the resulting WAV form is inaudible (or at least barely noticeable to the listener). I would prefer this be done server side (via PHP, etc) but if the processing load isn't too much then would be ok with something in Flash or Javascript. I'd be willing to pay someone to create me a workable solution (complete source code that functions as described). Thanks, Scott!

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• strange problem with WriteBeginTag

  - by user276640

  i use such code, but it renders with error <li class="dd0"><div id="dt1"<a href="http://localhost:1675/Category/29-books.aspx">Books</a></div></li> there is no > in opening tag div. what the problem? writer.WriteBeginTag("li"); //writer.WriteAttribute("class", this.CssClass); writer.WriteAttribute("class", "dd0"); if (!String.IsNullOrEmpty(this.LiLeftMargin)) { writer.WriteAttribute("style", string.Format("margin-left: {0}px", this.LiLeftMargin)); } writer.Write(HtmlTextWriter.TagRightChar); writer.WriteBeginTag("div"); writer.WriteAttribute("id", "dt1"); this.HyperLink.RenderControl(writer); writer.WriteEndTag("div"); writer.WriteEndTag("li");

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• Why the current working directory changes when use the Open file dialog in XP?

  - by RRUZ

  I have found an strange behavior when use the open file dialog in c#. If use this code in Windows XP the current working directory changes to the path of the selected file, however if you run this code in windows 7 the current working directory does not change. private void button1_Click(object sender, EventArgs e) { MessageBox.Show(string.Format("Current Directory {0}",Directory.GetCurrentDirectory()), "My Application",MessageBoxButtons.OK, MessageBoxIcon.Asterisk); DialogResult result = openFileDialog1.ShowDialog(); // Show the dialog and get result. if (result == DialogResult.OK) { } MessageBox.Show(string.Format("Current Directory {0}", Directory.GetCurrentDirectory()), "My Application", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); } Anybody know the reason for this behavior? Why the current directoiry changes in XP and not in windows 7?

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• Cannot insert non latin symbols in MySQL

  - by glebreutov

  I'm writing web-app using MySQL version 5.1.45, Tomcat 5.5.28 and Hibernate 3 When I'm trying to save string that contains non-latin characters (for example ??????) error occurs: 1589 [main] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 1366, SQLState: HY000 1589 [main] ERROR org.hibernate.util.JDBCExceptionReporter - Incorrect string value: '\xD0\xA3\xD0\xBF\xD1\x8F...' for column 'name' at row 1 Hibernate connection settings <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost/E2012?characterEncoding=UTF8&amp;useUnicode=true</property> <property name="connection.username">***</property> <property name="connection.password">***</property> <property name="hibernate.connection.charSet">UTF8</property> MySQL config My.cnf [client] default-character-set=utf8 [mysqld] default-character-set=utf8 Even query set name utf-8 doesn't resolve problem Thanks for help!

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