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  • How to use NSPredicate to catch child objects?

    - by Konstantin
    I'm new to core data and try to get all children objects of various types with one query. Say there's an "Animal" type as parent and "Cat", "Dog" and "Bird" as children. I'd like to get both cats and dogs, but not Birds in single query returned as Animal objects. Is it possible?

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  • is (StringComparison.)Ordinal the same as InvariantCulture for testing equality?

    - by Tim Lovell-Smith
    From what I read so far, it sounds like these StringComparison types are meant to differ in how they do sorting of strings, if so, does that mean that it does'nt matter which StringComparison you use when doing an equality comparison? string.Equals(a, b, StringComparison....) Extra credit: does it make a difference to the answer if we compare OrdinalIgnoreCase and InvariantCultureIgnoreCase? What is the answer then? Please provide supporting argument and/or references.

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  • .net code readability and maintainability

    - by george9170
    There Currently is a local debate as to which code is more readability We have one programmer who comes from a c background and when that programmer codes it looks like string foo = "bar"; if (foo[foo.Length - 1] == 'r') { } We have another programmer that doesn't like this methodology and would rather use if (foo.EndsWith("r")) { } which way of doing these types of operations is better?

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  • Convincing Management to use WCF

    - by Kyle Rozendo
    Hi All, I asked another question, stating that the I am unable to use WCF in a new Web Service project and have come to see that it seems to be the technology to use in regards to extensibility and security. My question is a simple one: How can I persuade management (and developers for that matter) to move over to using WCF as opposed to other web service technologies (ASMX/CFC)? They won't be concerned with a comparison between the types (especially with regard to ASMX), simply what there is to gain. Thanks for your time, Kyle

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  • Any PICK programmers on stack?

    - by Coov
    I work in a shop that is divided into two types of programmers. Programmers that code in .net & sql and programmers that code in pick. Actually, a few of the programmers are writing code in both pick and .net. I was curious if there are any pick programmers out there using StackOverflow? I'd like to get the pick programmers involved in the stack community.

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  • Convert text from English characters to Hebrew characters

    - by Ovi
    Using C#, when a user types a text in a normal textbox, how can you see the Hebrew equivalent of that text? I want to use this feature on a data entry form, when the secretary puts in the customer name using English characters to have it converted automatically in another textbox to the hebrew representation. Maybe something with CultureInfo("he-IL")...

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  • parsec-3.1.0 with custom token datatype

    - by Tener
    parsec-3.1.0 ( http://hackage.haskell.org/package/parsec-3.1.0 ) works with any token type. However there are combinators like Text.Parsec.Char.satisfy that are only defined for Char datatype. There doesn't seem to be any more general counterpart available. Should I define my own versions or did I miss something? Perhaps there are different parser libraries in Haskell that allows: custom token types custom parser state (I need to parse stateful format - Wavefront OBJ)

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  • integer Max value constants in SQL Server T-SQL?

    - by AaronLS
    Are there any constants in T-SQL like there are in some other languages that provide the max and min values ranges of data types such as int? I have a code table where each row has an upper and lower range column, and I need an entry that represents a range where the upper range is the maximum value an int can hold(sort of like a hackish infinity). I would prefer not to hard code it and instead use something like SET UpperRange = int.Max

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  • ContactsContract.CommonDataKinds.Relation does not show in Contacts app

    - by Mark R
    I programatically added almost every type of contact field to a contact and they all work except for Relation. Relation types get added to the contacts database, but they don't show up in the Contacts app. I don't see a way to add Relation information through the Contacts GUI for a standard Gmail contact either. Does the Contacts app just not support this data type?

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  • Xcode Objective-c warnings "creating selector for nonexistent method" with OCUnit (SenTestingKit)

    - by niblha
    I started getting getting warnings like the following in XCode when trying to write some unit tests with OCUnit (SenTestingKit). warning: creating selector for nonexistent method 'myMethodName1:' warning: creating selector for nonexistent method 'myMethodName2:' ... warning: creating selector for nonexistent method 'release' warning: creating selector for nonexistent method 'retain' warning: creating selector for nonexistent method 'alloc' warning: creating selector for nonexistent method 'init' Is it something I should worry about, or can I somehow disable these types of warnings by some compiler flag?

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  • How to Convert Type in Tuples

    - by Pradeep
    how to convert a String type to a Int i have a tuple and i want to convert it to a tuple which has different types tupletotuple :: (String,String,String) ->(String,Int,Int) tupletotuple (a,b,c) = (a,read(b),read(c)) i get this Error Msg Project tupletotuple ("cha",4,3) ERROR - Cannot infer instance * Instance : Num [Char] * Expression : tupletotuple ("cha",4,3)

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  • How to add WCF templates to Visual Studio Express?

    - by Mike Kantor
    I am working through the book Learning WCF by Michele Bustamante, and trying to do it using Visual Studio C# Express 2008. The instructions say to use WCF project and item templates, which are not included with VS C# Express. There are templates for these types included with Visual Studio Web Developer Express, and I've tried to copy them over into the right directories for VS C# Express to find, but the IDE doesn't find them. Is there some registration process? Or config file somewhere?

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  • How are integers casted to bytes in Java?

    - by helixed
    I know Java doesn't allow unsigned types, so I was wondering how it casts an integer to a byte. Say I have an integer a with a value of 255 and I cast the integer to a byte. Is the value represented in the byte 11111111? In other words, is the value treated more as a signed 8 bit integer, or does it just directly copy the last 8 bits of the integer? Thanks, helixed

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  • What is the best keyboard/mouse for ergonomics or to prevent wrist pain?

    - by Steve Duitsman
    I have had pain in my wrists in the past, and as someone who types all day, I was wondering what are some keyboards or mice that have helped for this sort of pain. Update: Many answers have recommended examining chairs/desks for ergonomics. As someone who isn't able to work from home and therefore doesn't have a lot of control over this; is ordering my own chair/desk (whether my employer or I purchase it) a solution that's really realistic?

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  • Problem with JSON, Struts 2 and Ajax.

    - by Javi
    Hello, I have an apllication with Struts 2, Spring and I want to send JSON as a response to an Ajax request, but my server in not sending the JSON in the response. I have this base package: <package name="myApp-default" extends="struts-default"> <result-types> <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" /> <result-type name="json" class="com.googlecode.jsonplugin.JSONResult"> <param name="enableGZIP">true</param> <param name="noCache">true</param> <param name="defaultEncoding">ISO-8859-1</param> </result-type> </result-types> </package> And another package which extends the previous one. <package namespace="/rest" name="rest" extends="myApp-default"> <action name="login" class="restAction" method="login"> <result type="json"/> </action> So I call with jQuery Ajax and debugging it I see it enters in the Action restAction in the method login and it also enters in the method getJsonData() because I have set two breakpoints and the program is stopped first in login and then in getJsonData. public class RestAction extends BaseAction { private String login; private String password; private String jsonData; public String login() { jsonData = "changed"; return Action.SUCCESS; } //I ommit getter/setters for login and password @JSON(name="jsonData") public String getJsonData() { return jsonData; } public void setJsonData(String jsonData) { this.jsonData = jsonData; } } My ajax looks like this: $.ajax({type: 'GET', url: this_url, data: pars, cache:false, success: handleResponse, error: handleError}); With firebug I see that the response to my request is completely void (though I have seen that the data saved in pars variable has been populated to the action and the methods have been executed correctly). And maybe for that reason my ajax enters in my handleError function where xmlHttpRequest.readyState is 4 and xmlHttpRequest.status is 0. Can anyone tell me what may the problem be? Thanks.

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  • .NET Com Interobability

    - by Kottan
    I have C# class X which inherits from class Y. Class X should be Com-Visible (should be used in an old Vb6 application). It is it neccessary to use some Types of class Y in the VB6 application. How can I make them also COM-vivible (without changing class Y) ?

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  • Using SQL Server Intergration Services (SSIS) can you read a file from a FileStream column in SQL Se

    - by tbrovold
    I am trying to create a tool that I can upload different types of files "csv", Excel, XML and load those files into a FileStream column in the database as "Source" untouched over the web. Then using SSIS on the server I want to create a package that will process that file to be loaded into other tables to be used by the web application. Is it possible to have SSIS read a file from FileStream column? if so how?

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  • Generate xml from dataset using xsd in C# at runtime

    - by Archie
    Hello, I want to generate an XML file according to the xsd given at runtime. I have dataset which would be used to fill up the values. Can anyone tell me a simple solution? Also, my xsd file is very big and has complex types in it. and I dont want to try any third party tools. Its urgent. Please help.

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  • Why can't the compiler/JVM just make autoboxing "just work"?

    - by Pyrolistical
    Autoboxing is rather scary. While I fully understand the difference between == and .equals I can't but help have the follow bug the hell out of me: final List<Integer> foo = Arrays.asList(1, 1000); final List<Integer> bar = Arrays.asList(1, 1000); System.out.println(foo.get(0) == bar.get(0)); System.out.println(foo.get(1) == bar.get(1)); That prints true false Why did they do it this way? It something to do with cached Integers, but if that is the case why don't they just cache all Integers used by the program? Or why doesn't the JVM always auto unbox to primitive? Printing false false or true true would have been way better. EDIT I disagree about breakage of old code. By having foo.get(0) == bar.get(0) return true you already broke the code. Can't this be solved at the compiler level by replacing Integer with int in byte code (as long as it is never assigned null)

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  • Namespaces combined with TFS / Source Control explanation

    - by Christian
    As an ISV company we slowly run into the "structure your code"-issue. We mainly develop using Visual Studio 2008 and 2010 RC. Languages c# and vb.net. We have our own Team Foundation Server and of course we use Source Control. When we started developing based on the .NET Framework, we also begun using Namespaces in a primitive way. With the time we 'became more mature', i mean we learned to use the namespaces and we structured the code more and more, but only in the solution scope. Now we have about 100 different projects and solutions in our Source Safe. We realized that many of our own classes are coded very redundant, i mean, a Write2Log, GetExtensionFromFilename or similar Function can be found between one and 20 times in all these projects and solutions. So my idea is: Creating one single kind of root folder in Source Control and start an own namespace-hierarchy-structure below this root, let's name it CompanyName. A Write2Log class would then be found in CompanyName.System.Logging. Whenever we create a new solution or project and we need a log function, we will 'namespace' that solution and place it accordingly somewhere below the CompanyName root folder. To have the logging functionality we then import (add) the existing project to the solution. Those 20+ projects/solutions with the write2log class can then be maintained in one single place. To my questions: - is that a good idea, the philosophy of namespaces and source control? - There must be a good book explaining the Namespaces combined with Source Control, yes? any hints/directions/tips? - how do you manage your 50+ projects?

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  • Groovy Mixin on Instance (Dynamic Mixin)

    - by david
    I'm trying to achieve following: class A { def foo() { "foo" } } class B { def bar() { "bar" } } A.mixin B def a = new A() a.foo() + a.bar() with one significant difference - I would like to do the mixin on the instance: a.mixin B but this results in groovy.lang.MissingMethodException: No signature of method: A.mixin() is applicable for argument types: (java.lang.Class) values: [class B] Is there a chance to get this working like proposed in the Groovy Mixins JSR?

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