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• Is it a good practice to have trim in setter?

  - by zibi

  I'm doing a code review and I noticed such a code: @Entity @Table(name = "SOME_TABLE") public class SomeReportClass { @Column(name = "REPORT_NUMBER", length = 6, nullable = false) private String reportNumber; ..... public String getReportNumber() { return reportNumber; } public void setReportNumber(String reportNumber) { this.reportNumber = StringUtils.trimToNull(reportNumber); } } Every time I see trimming inside of a setter I feel that its not the clearest solution - what is the general practice with that issue?

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• Access element of pointed std::vector

  - by user146780

  I have a function where I provide a pointer to a std::vector. I want to make x = to vector[element] but i'm getting compiler errors. I'm doing: void Function(std::vector<int> *input) { int a; a = *input[0]; } What is the right way to do this? Thanks

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• Will the error be displayed?

  - by user281180

  I have an ajax post and in the controller I return nothing. In case there is a failure will the error message displayed with the follwoing code? [AcceptVerbs(HttpVerbs.Post)] public void Edit(Model model) { model.Save(); } $.ajax({ type: "POST", url: '<%=Url.Action("Edit","test") %>', data: JSON.stringify(data), contentType: "application/json; charset=utf-8", dataType: "html", success: function() { }, error: function(request, status, error) { alert("Error: " & request.responseText); } });

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• Why are interfaces unusable in PHP?

  - by streetparade

  I mean an interface definition without defining the return type makes it unusable? This makes more Clear Interface run { public function getInteger(); } class MyString implements run { public function myNumber() { } public function getInteger() { return "Not a number"; } } In Java every Interface has a return type like Integer,String,Void I know that PHP is unfortunately a loosly typed Language but isnt there a Solution for that Problem? Is it Possible to defining a Interface with a Return type like Integer?

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• How should onClick Listener by defined and instantiated for an Activity

  - by Code Droid

  My Activity has multiple lists so I have defined MyClickListener as below: My question is how I should instantiate this class: MyClickListener mMyClickListener = new MyClickListener(); Or maybe it is better to instantiate inside the onCreate(Bundle) and just define above. Whats considered the better way? I don't want too much in onCreate() its already full of stuff. Any thoughts on the declaration and instatiation? Whats the best way? private class MyClickListener implements OnClickListener { @Override public void onClick(View view) { } }

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• Alert box not being called upon button click

  - by user279521

  I have a fairly simple code, a button click event, with the first line being a message box. When the button is clicked, the messagebox is not called. protected void btnSubmitToCRM_Click(object sender, EventArgs e) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1');", true); if (!ValidateCoreValue()) { ClientScript.RegisterStartupScript(GetType(), "alert", "alert('btnSubmitToCRM_Click - 1 - False');", true); return; } } Any ideas?

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• something about C++ unnamed namespace.

  - by Javran

  #include <iostream> namespace { int a=1; } int a=2,b=3; int main(void) { std::cout<<::a<<::b; return 0; } I complie it with my g++,but the output is 23, who can explain it? is that a way to get access to the <unnamed> namespace ::a?

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• Pointers in c/c++

  - by jammkie same

  include void main() { int p[]={0,1,2,3,4}; int *a[]={p,p+1,p+2,p+3,p+4}; printf("%u %u %u %u",a,a,(*a)); } What should be the output of the above code? And if we make array p as static(static int p[]), output gets changed .Why?

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• this parameter modifier in C#?

  - by Ivan

  I'm curious about this code snippet: public static class XNAExtensions { /// <summary> /// Write a Point /// </summary> public static void Write(this NetOutgoingMessage message, Point value) { message.Write(value.X); message.Write(value.Y); } // ... }; What does the this keyword mean next to the parameter type? I can't seem to find any information about it anywhere, even in the C# specification.

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• Weird initialization in C

  - by pacopepe

  Hi there, I have this piece of code and i don't know how it works #include <stdio.h> int main(void) { int numero = ({const int i = 10; i+10;}); printf("%d\n", numero); // Prints 20 return 0; } Why if i delete the second part (i+10;), the compiler gets an error? Why are the brackets necessary? Thank you ^^!

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• java source code doubt

  - by abson

  Why is it that class swi22 { public static void main(String[] args) { int a=98; switch(a) { default:{ System.out.println("default");continue;} case 'b':{ System.out.println(a); continue;} case 'a':{ System.out.println(a);} } System.out.println("Switch Completed"); } } gives error as: continue outside of loop

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• Open new panel with button clicked.

  - by bat

  Java Swing GUI: I am using ActionListener to preform the action when a button is clicked. What i want to do is when a button is clicked, open a new panel, but load/get the new panel from a different file. This is what i have so far but i rather just link to another file. THANKS! =] public void actionPerformed(java.awt.event.ActionEvent e) { //something like this... loadFile(newPlane.java); }

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• How to use __LINE__ in a string

  - by John

  Just using it as a method parameter is fine but what about an easy way to use it in strings? For instance say I have this: 11 void myTest() 12 { 13 if(!testCondition) 14 logError("testcondition failed"); 15 } And I want the output to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?

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• Is there any way to accomplish something like List<object> list = new List<int>() in C#?

  - by devoured elysium

  That is the question. What I want to accomplish is something similar to the following Java code: class A { } class B extends A { } public class Tests { public static void main(String [] args) { ArrayList<? extends A> lists = new ArrayList<B>(); } } (in which B extends A means B inherits from A) Is it possible at all? Thanks

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• Multiple key presses doing different events in C#

  - by Nevik Eeirnb

  Hi, private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.W) player1.moveUp(); if (e.KeyCode == Keys.NumPad8) player2.moveUp(); } In the above code the moveUp methods basically just increment a value. I want it so both keys can be pressed (or held down)at the same time and both events will trigger. Thanks, Nevik

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• C++: Syntax for map where Data type is function?

  - by Rosarch

  In C#, what I want would look something like this: IDictionary<string, action()> dict = new Dictionary<string, action()>(); How do I do this in C++? This gives compiler errors: map<string, void()> exercises;

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• How to pass array to function without variable instantiation, in C++

  - by Vincenzo

  Can I do this in C++ (if yes, what is the syntax?): void func(string* strs) { // do something } func({"abc", "cde"}); I want to pass an array to function, without instantiating it as a variable. Thanks for suggestions.

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• How does the following code work? It gives the answer how I want. But I want to know how it works? C

  - by user338096

  public static void ShutDownComputer() { ManagementBaseObject outParameter = null; ManagementClass sysOs = new ManagementClass("Win32_OperatingSystem"); sysOs.Get(); sysOs.Scope.Options.EnablePrivileges = true; ManagementBaseObject inParameter = sysOs.GetMethodParameters("Win32Shutdown"); inParameter["Flags"] = "8"; inParameter["Reserved"] = "0"; foreach (ManagementObject maObj in sysOs.GetInstances()) { outParameter = maObj.InvokeMethod("Win32Shutdown", inParameter, null); } }

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• Getting OperationName in RequestInterceptor

  - by zak

  I have implemented a custom requestor interceptor for the purpose of authenticating requests, similar to below. I am trying to get the operation name in ProcessRequest and unable to. Can anyone let me know how do I get the operation name here? public class SampleInterceptor: Microsoft.ServiceModel.Web.RequestInterceptor { public SampleInterceptor() : base(true) { } public override void ProcessRequest(ref System.ServiceModel.Channels.RequestContext requestContext) { //need the operation name here to authenticate } }

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• expected identifier before ‘(’

  - by gcc

  stored_name_t scan_construct_struct(void) { stored_name_t stn; int i=0; scanf("%c %lf %lf",&(stn.name) ,&(stn.(the_lower_limit)) ,&(stn.(the_upper_limit))); for(i=0; (scanf("%s", stn.(numbers[i])))!=0; ++i) ; return stn; } dene.c:37: error: expected identifier before ‘(’ token and there is an one more error but I cannot see

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• Flex: cannot resize player back from Full Screen

  - by Patrick

  hi, The key event is not listened by my Flex app. Since it is really simple code, I cannot understand where the problem is... init() { stage.addEventListener(KeyboardEvent.KEY_DOWN, escHandler); } private function escHandler(event:KeyboardEvent):void { debugF.text = "ESC pressed"; } thanks

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• Is it possible to access the Class object in a static method?

  - by Bears will eat you

  Consider the following Java class: public class Foo { public static void doStuff() { // boring stuff here } } Is it possible to access either the class literal Foo.class, or just the class name "Foo" from within a static method such as doStuff()? In a non-static method I would just call this.getClass(), but there is no this to use in a static method.

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• "The operation has timed out" when trying to send email

  - by user1718859

  protected void Button1_Click(object sender, EventArgs e) { try { SmtpClient sm = new SmtpClient(); MailMessage ms = new MailMessage(); ms.To.Add(new MailAddress(TextBox1 .Text )); ms.Subject = TextBox2.Text; ms.Body = TextBox3.Text; ms.IsBodyHtml = true; sm.Send(ms); } catch (Exception el) { Response.Write(el.Message); } }

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• Timer (NSTimer) won't work...why?

  - by eco_bach

  Hi I have the following, can anyone familiar with NSTimer tell me why it isn't working?? I've tried various values for an interval but no luck. self.timer = [NSTimer scheduledTimerWithTimeInterval:.5 target:self selector:@selector(update:) userInfo:nil repeats:YES]; And then my selector method - (void)update:(NSTimer*)timer { //DOESN"T TRACE OUT! NSLog(@" update:theTimer and userInfo = %@",timer.userInfo); }

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• saveOrUpdate(Object) method of Hibernate

  - by Vikram

  when i use saveOrUpdate(Object) method of Hibernate. How can I know that row is updated or new row added into table??? Return type of method saveOrUpdate(Object) is void, so am not able to find out the result after calling this method. kindly help me.

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