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  • Creating a common selector class with UITableView or UIPicker

    - by trevrosen
    I have several places in my app where I need to select a Foo for further processing from a list of Foo objects. I'd like to do this as a modal view, but neither UIPicker nor UITableView seems to lend itself to the standard approach, since the usual way to do a modal view controller involves setting the parent view controller up as the delegate, and both of those classes need to implement data source protocols, etc. Implementing the data source and selection protocol methods in my parent view controller defeats the purpose of trying to use one common class for implementing this modal selector screen all over my app. Does anyone have any solutions to this problem or am I effectively stuck implementing this selector class over and over again?

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  • Unable to generate temporary class for web service

    - by sac
    I have an application with a proxy class for my webservice - This works fine in all 32-bit machines. However the same app throws an exception in windows server 2008 64-bit machine. It looks like the temporary class could not be generated for the web service. The error in the event viewer is "error CS0008: Unexpected error reading metadata from file '' -- 'Bad Key. ' Here's the call stack... at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence) at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies) at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence) at System.Xml.Serialization.XmlSerializer.GetSerializersFromCache(XmlMapping[] mappings, Type type) at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Type type) at System.Web.Services.Protocols.SoapClientType..ctor(Type type) at System.Web.Services.Protocols.SoapHttpClientProtocol..ctor() at Fusion.ServiceCatalogProxy..ctor() I am not able to get any info about this bad key error....

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  • Error using traits class.: "expected constructor destructor or type conversion before '&' token"

    - by Mark
    I have a traits class that's used for printing out different character types: template <typename T> class traits { public: static std::basic_ostream<T>& tout; }; template<> std::ostream& traits<char>::tout = std::cout; template<> std::wostream& traits<unsigned short>::tout = std::wcout; gcc (g++) version 3.4.5 (yes somewhat old) is throwing an error: "expected constructor destructor or type conversion before '&' token" And I'm wondering if there's a good way to resolve this. (it's also angry about _O_WTEXT so if anyone's got some insight into that, I'd also appreciate it)

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  • Python 3.1.1 Class Question

    - by Protean
    I'm a new Python programmer who is having a little trouble using 'self' in classes. For example: class data: def __init__(self): self.table = [] def add(self, file): self.table.append(file) data.add('yes') In this function I want to have table be a variable stored in the class data and use add to modify it. However, when I run this script it gives me the error: Traceback (most recent call last): File "/Projects/Python/sfdfs.py", line 7, in <module> data.add('yes') TypeError: add() takes exactly 2 positional arguments (1 given) I assume that I am trying to call the function the wrong way in this instance, as this syntax is very similar to an example in the python documentation: http://docs.python.org/3.1/tutorial/classes.html

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  • Python-MySQLdb problem: wrong ELF class: ELFCLASS32

    - by jsalonen
    As part of trying out django CMS (http://www.django-cms.org/), I'm struggling with getting Python-MySQLdb to work (http://pypi.python.org/pypi/MySQL-python/). I have installed Django CMS and all of its dependencies (Python 2.5, Django, django-south, MySQL server) I'm trying out the example code within Django CMS code with MySQL as chosen database type When I execute python manage.py syncdb, the following error occurs: django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: /root/.python-eggs/MySQL_python-1.2.3c1-py2.5-linux-i686.egg-tmp/_mysql.so: wrong ELF class: ELFCLASS32 I have been able to trace the problem specifically to python-mySQLdb (as also visible in the stack trace). Other than that, I am completely puzzled. I don't have a clue what ELFCLASS32 means, or what ELF class is anyway. I suspect that this error could have something to do with the fact that I am running 64-bit version of Debian 5 (on a VPS). Any good ideas how to troubleshoot?

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  • Adding an attribute to a class by using properties editor

    - by Fred Yang
    Visual studio allows you to design component visually. For example, you are designing a windows form. You change its property in the properties editor. The IDE will generate the code in a partial class in xx.designer.cs file. We can customize this behavior by changing the UITypeEditor for the properties. The question now is , Can we extend this code generation behavior? for example, we change a setting in property window, and then the IDE will add an .net Attribute to the class? Thanks

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  • Share c# class source code between several projects

    - by phq
    I have written a class that will handle internal logging in my application. Now I want to use this class in another new and totally separate project. I could simply copy the file to the new project folder, but I would like to only have one copy of it to maintain so that all changes in it will apply to both projects over time. I can use the "add existing file", but where do I put the file so that the next developer knows that it is required. I have once had a "shared" folder for this but one time that folder was not brought into the next development computer. What is the best way to organize this so that it makes most sense for new maintainers and minimizes the risk for broken links in projects.

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  • key value coding-compliant for NSObject class?

    - by 4thSpace
    I've created a singleton class that loads a plist. I keep getting this error when I try to set a value: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key test.' I have one key in the plist file. The key is named "test" and has no value associated with it. I set the value like this: [[PlistManager sharedManager].plist setValue:@"the title value" forKey:@"test"]; I look at the set plist dictionary and see this from within PlistManager: po self.plistDictionary { test = ""; } I get the error just as I'm leaving PlistManager in the debugger. PlistManager is of type NSObject. So no xibs. Any ideas on what I need to do?

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  • How to set HTTP Headers from client class inherited from SoapHttpClientProtocol

    - by Alfred
    I'm using a class MyClass inherited from SoapHttpClientProtocol (auto-generated in my project by creating a WebReference from a .wsdl file, representing a service). Before calling a "WebMethod" of this service, I need to custom the http header of my request. I tried overloading the GetWebRequest() method of SoapHttpClientProtocol that way : public partial class MyClass: System.Web.Services.Protocols.SoapHttpClientProtocol{ protected override WebRequest GetWebRequest(Uri uri) { HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(uri); request.Headers.Add("MyCustomHeader", "MyCustomHeaderValue"); return request; } } I was hoping that GetWebRequest was called in the constructor of MyClass, apparently it's not. Could someone help me ?

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  • Using the same class in both server and web service

    - by iTayb
    I have classes that are needed in both my web service and my server. For example, I have a class named Order that I'd like to send from my server to the web service and vice-versa. Problem is that the class in the server is Order and the one on the web service is localhost.Order, and it is impossible to convert between them, even though they are built from the very same code. Error is cannot convert from 'Order[]' to 'localhost.Order[]'. What can I do? Thank you very much.

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  • How to fix width of DIV that contains floated elements?

    - by joe
    I have a DIV container with several inner DIVs layed out by floating them all left. The inner DIVs may change width on certain events, and the containing DIV adjusts accordingly. I use float:left in the container to keep it shrunk to the width of the inner divs. I use float:left in the inner divs so the layout is clean even when their contents change. The catch is that I want the DIV container width and height to remain constant, UNLESS a particular event causes a change to the inner widths. Conceptually I want to use float on the inners for the layout benefit, but then I want to "fix" them so they don't float around. So if the container is 700px wide, I want it to remain so even if the user narrows the browser window. I'd like the container, and it's internal DIVs to just be clipped by the browser window. I sense this can all be done nicely in CSS, I just can't quite figure out how. I'm not averse to adding another container if necessary... Since the only desired layout changes are event-based, I am also willing to use a bit of JS. But is this necessary? (And I'm still not sure I know what to modify: container dimensions? inner floatiness? other?) <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <style type="text/css"> #canvas { overflow:auto; /* for clearing floats */ } #container { float:left; /* so container shrinks around contained divs */ border:thin solid blue; } .inner { float:left; /* so inner elems line up nicely w/o saying fixed coords */ padding-top:8px; padding-bottom:4px; padding-left:80px; padding-right:80px; } #inner1 { background-color:#ffdddd; } #inner2 { background-color:#ddffdd; } #inner3 { background-color:#ddddff; } </style> </head> <body> <div id="canvas"> <div id="container"> <div id="inner1" class="inner"> inner 1 </div> <div id="inner2" class="inner"> inner 2 </div> <div id="inner3" class="inner"> inner 3 </div> </div> </div> cleared element </body> </html>

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  • Why is business-class storage so expensive?

    - by Mark Henderson
    This is a Canonical Question about the Cost of Enterprise Storage. See also the following question: What's the best way to explain storage issues to developers and other users Regarding general questions like: Why do I have to pay 50 bucks a month per extra gigabyte of storage? Our file server is always running out of space, why doesn't our sysadmin just throw an extra 1TB drive in there? Why is SAN equipment so expensive? The Answers here will attempt to provide a better understanding of how enterprise-level storage works and what influences the price. If you can expand on the Question or provide insight as to the Answer, please post.

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  • Why callback functions needs to be static when declared in class

    - by Dave17
    I was trying to declare a callback function in class and then somewhere i read the function needs to be static but It didn't explain why? #include <iostream> using std::cout; using std::endl; class Test { public: Test() {} void my_func(void (*f)()) { cout << "In My Function" << endl; f(); //Invoke callback function } static void callback_func() {cout << "In Callback function" << endl;} }; int main() { Test Obj; Obj.my_func(t.callback_func); }

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  • Using YQL multi-query & XPath to parse HTML, how to escape nested quotes?

    - by Tivac
    The title is more complicated than it has to be, here's the problem query. SELECT * FROM query.multi WHERE queries=" SELECT * FROM html WHERE url='http://www.stumbleupon.com/url/http://www.guildwars2.com' AND xpath='//li[@class=\"listLi\"]/div[@class=\"views\"]/a/span'; SELECT * FROM xml WHERE url='http://services.digg.com/1.0/endpoint?method=story.getAll&link=http://www.guildwars2.com'; SELECT * FROM json WHERE url='http://api.tweetmeme.com/url_info.json?url=http://www.guildwars2.com'; SELECT * FROM xml WHERE url='http://api.facebook.com/restserver.php?method=links.getStats&urls=http://www.guildwars2.com'; SELECT * FROM json WHERE url='http://www.reddit.com/button_info.json?url=http://www.guildwars2.com'" Specifically this line, xpath='//li[@class=\"listLi\"]/div[@class=\"views\"]/a/span' It's problematic because of the quoting, I have to nest them three levels deep and I've run out of quote characters to use. I've tried the following variations without success: //no attribute quoting xpath='//li[@class=listLi]/div[@class=views]/a/span' //try to quote attribute w/ backslash & single quote xpath='//li[@class=\'listLi\']/div[@class=\'views\']/a/span' //try to quote attribute w/ backslash & double quote xpath='//li[@class=\"listLi\"]/div[@class=\"views\"]/a/span' //try to quote attribute with double single quotes, like SQL xpath='//li[@class=''listLi'']/div[@class=''views'']/a/span' //try to quote attribute with double double quotes, like SQL xpath='//li[@class=""listLi""]/div[@class=""views""]/a/span' //try to quote attribute with quote entities xpath='//li[@class=&quot;listLi&quot;]/div[@class=&quot;views&quot;]/a/span' //try to surround XPath with backslash & double quote xpath=\"//li[@class='listLi']/div[@class='views']/a/span\" //try to surround XPath with double double quote xpath=""//li[@class='listLi']/div[@class='views']/a/span"" All without success. I don't see much out there about escaping XPath strings but everything I've found seems to be variations on using concat (which won't help because neither ' nor " are available) or html entities. Not using quotes for the attributes doesn't throw an error but fails because it's not the actual XPath string I need. I don't see anything in the YQL docs about how to handle escaping. I'm aware of how edge-casey this is but was hoping they'd have some sort of escaping guide.

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  • python: variable not getting defined after several conditionals

    - by Protean
    For some reason this program is saying that 'switch' is not defined. What is going on? #PYTHON 3.1.1 class mysrt: def __init__(self): self.DATA = open('ORDER.txt', 'r') self.collect = 0 cache1 = str(self.DATA.readlines()) cache2 = [] for i in range(len(cache1)): if cache1[i] == '*': if self.collect == 0: self.collect = 1 elif self.collect == 1: self.collect = 0 elif self.collect == 1: cache2.append(cache1[i]) self.ORDER = cache2 self.ARRAY = [] self.GLOBALi = 0 self.GLOBALmax = range(len(self.ORDER)) self.GLOBALc = [] self.GLOBALl = [] def sorter(self, array): CACHE_LIST_1 = [] CACHE_LIST_2 = [] i = 0 for ORDERi in range(len(self.ORDER)): for ARRAYi in range(len(array)): CACHE = array[ARRAYi] if CACHE[self.GLOBALi] == self.ORDER[ORDERi]: CACHE_LIST_1.append(CACHE) else: CACHE_LIST_2.append(CACHE) for i in range(len(CACHE_LIST_1)): if CACHE_LIST_1[0] == CACHE_LIST_1[i] or range(len(CACHE_LIST_1)) == 1: switch = 1 print ('1') else: switch = 0 print ('0') break if switch == 1: self.GLOBALl += CACHE_LIST_1 + self.GLOBALc self.GLOBALi = 0 self.GLOBALc = [] else: self.GLOBALi += 1 self.GLOBALc += CACHE_LIST_2 mysrt.sorter(CACHE) return (self.GLOBALl) #GLOBALi =0 # if range(len(self.GLOBALc)) =! range(len(self.ARRAY)) array = ['ape', 'cow','dog','bat'] ORDER_FILE = [] mysort = mysrt() print (mysort.sorter(array))

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  • Should I Make These Vectors Classes or Structs in C#

    - by dewald
    I am creating a geometry library in C# and I will need the following immutable types: Vector2f (2 floats - 8 bytes) Vector2d (2 doubles - 16 bytes) Vector3f (3 floats - 12 bytes) Vector3d (3 doubles - 24 bytes) Vector4f (4 floats - 16 bytes) Vector4d (4 doubles - 32 bytes) I am trying to determine whether to make them structs or classes. MSDN suggests only using a struct if the size if going to be no greater than 16 bytes. That reference seems to be from 2005. Is 16 bytes still the max suggested size? I am sure that using structs for the float vectors would be more efficient than using a class, but what should I do about the double vectors? Should I make them structs also to be consistent, or should I make them classes?

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  • I can't build C# class library by MonoDevelop on Mac OS X

    - by wataradio
    When building following simple C# class library, using System; namespace MyProject { public class MyClass { public MyClass () { } } } I encountered following error message: /Library/Frameworks/Mono.framework/Versions/2.6.4/lib/mono/2.0/Microsoft.Common.targets: Error: You must specify DestinationFolder or DestinationFiles attribute. at Microsoft.Build.Tasks.Copy.Execute () [0x00000] in <filename unknown>:0 Anyone having the same problem? Somethig I tried: This error is solved if I change my project file format "MSBuild (Visual Studio 2008)" to "MonoDevelop 1.0" (Preferences Load/Save Project file format to use when creating new projects) There is no problem when building console app project. Only library project is the problem. There is no problem on Ubuntu and SUSE My Environments: MonoDevelop 2.2.2 Mono 2.6.4 Mac OS X 10.6.3

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  • Checking to see if a generic class is inherited from an interface

    - by SnOrfus
    I've got a class that inherits from an interface. That interface defines an event that I'd like to subscribe to in the calling code. I've tried a couple of things, but they all resolve to false (where I know it's true). How can I check to see if a class implements a specific interface. Here's what I've tried (note, the object in question is a usercontrol that implements MyInterface, stored in an array of controls, only some of which implement MyInterface - it is not null): if (this.controls[index].GetType().IsSubclassOf(typeof(MyInterface))) ((MyInterface)this.controls[index]).Event += this.Handler; if (this.controls[index].GetType().IsAssignableFrom(typeof(MyInterface))) ((MyInterface)this.controls[index]).Event += this.Handler; if (this.controls[index].GetType() == typeof(MyInterface)) ((MyInterface)this.controls[index]).Event += this.Handler; All to no avail.

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  • ByteBuffer recycling class

    - by Chris Dennett
    Hi everyone, I'm wonder how I'd code up a ByteBuffer recycling class that can get me a ByteBuffer which is at least as big as the specified length, and which can lock up ByteBuffer objects in use to prevent their use while they are being used by my code. This would prevent re-construction of DirectByteBuffers and such over and over, instead using existing ones. Is there an existing Java library which can do this very effectively? I know Javolution can work with object recycling, but does that extend to the ByteBuffer class in this context with the requirements set out? Cheers, Chris

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  • Python 3.1.1 Problem With Tuples

    - by Protean
    This piece of code is supposed to go through a list and preform some formatting to the items, such as removing quotations, and then saving it to another list. class process: def rchr(string_i, asciivalue): string_o = () for i in range(len(string_i)): if ord(string_i[i]) != asciivalue: string_o += string_i[i] return string_o def flist(self, list_i): cache = () cache_list = [] for line in list_i: cache = line.split('\t') cacbe[0] = process.rchr(str(cache[0]), 34) cache_list.append(cache[0]) cache_list[index] = cache index += 1 cache_list.sort() return cache_list p = process() list1a = ['cow', 'dog', '"sheep"'] list1 = p.flist(list1a) print (country_list) However; it chokes at 'string_o += string_i[i]' and gives the following error: Traceback (most recent call last): File "/Projects/Python/safafa.py", line 23, in <module> list1 = p.flist(list1a) File "/Projects/Python/safafa.py", line 14, in flist cacbe[0] = process.rchr(str(cache[0]), 34) File "/Projects/Python/safafa.py", line 7, in rchr string_o += string_i[i] TypeError: can only concatenate tuple (not "str") to tuple

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  • How to make a reference to a normal java class from GWT server side

    - by mohammed-qumhieh
    hello I building my project using GWT plugin for eclipse Galileo, after i done from RPC between the server and client, i trying to make a reference from gwt server side to normal java class in non-gwt-project, but every time i make an object from the class (which in non-gwt-project) gives me ClassNotFoundException. i did the buildpath for the gwt project, but still gives me the same exception, is there a way to make that from server side (not from client side). i need help please, i spent a lot of time searching for solution but i did not found anything. i appreciate any suggestions...thanks

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  • non-class rvalues always have cv-unqualified types

    - by FredOverflow
    §3.10 section 9 says "non-class rvalues always have cv-unqualified types". That made me wonder... int foo() { return 5; } const int bar() { return 5; } void pass_int(int&& i) { std::cout << "rvalue\n"; } void pass_int(const int&& i) { std::cout << "const rvalue\n"; } int main() { pass_int(foo()); // prints "rvalue" pass_int(bar()); // prints "const rvalue" } According to the standard, there is no such thing as a const rvalue for non-class types, yet bar() prefers to bind to const int&&. Is this a compiler bug? EDIT: Apparently, this is also a const rvalue :)

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