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  • Absolute path of a file object

    - by Morgoth
    This has been discussed on StackOverflow before - I am trying to find a good way to find the absolute path of a file object, but I need it to be robust to os.chdir(), so cannot use f = file('test') os.path.abspath(f.name) Instead, I was wondering whether the following is a good solution - basically extending the file class so that on opening, the absolute path of the file is saved: class File(file): def __init__(self, filename, *args, **kwargs): self.abspath = os.path.abspath(filename) file.__init__(self, filename, *args, **kwargs) Then one can do f = File('test','rb') os.chdir('some_directory') f.abspath # absolute path can be accessed like this Are there any risks with doing this?

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  • 2 ways to create new object by setting property values

    - by Samvel Siradeghyan
    Hi all I have a class Question which has a property Text public class Question { public string Text { get; set; } } Now I wont create on object of this type by giving value to property. I can do that in this two ways: Question q = new Question { Text = "Some question" }; and Question q = new Question() { Text = "Some question" }; Is there any difference between this two cases and if they are the same, why we need both? Thanks.

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  • ComboBox's Selected Value Changed On Lost Focus in VB.NET

    - by tunwn
    I have a datagridview(dgv) with a DataGridViewComboBoxColumn(colLocation) colLocation.AutoComplete = False colLocation.HeaderText = "Stored to" colLocation.DataSource = DB.getLocation() colLocation.DisplayMember = "description" colLocation.ValueMember = "id" I added the colLocation to dgv. "descirption" contains Unicode characters. I can see the comboBox correctly and choose the item. The problem is when the comboBox lost the focus, the value is changed to first item of the comboBox. Any suggestion? Updated: I found out that the ComboBox doesn't change the data when the DisplayMember is in English characters. It changes only when the DisplayMember is in Unicode chracter. Any idea for how could solve this? – tunwn 0 secs ago

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  • should I ever put a major version number into a C#/Java namespace?

    - by Andrew Patterson
    I am designing a set of 'service' layer objects (data objects and interface definitions) for a WCF web service (that will be consumed by third party clients i.e. not in-house, so outside my direct control). I know that I am not going to get the interface definition exactly right - and am wanting to prepare for the time when I know that I will have to introduce a breaking set of new data objects. However, the reality of the world I am in is that I will also need to run my first version simultaneously for quite a while. The first version of my service will have URL of http://host/app/v1service.svc and when the times comes by new version will live at http://host/app/v2service.svc However, when it comes to the data objects and interfaces, I am toying with putting the 'major' version of the interface number into the actual namespace of the classes. namespace Company.Product.V1 { [DataContract(Namespace = "company-product-v1")] public class Widget { [DataMember] string widgetName; } public interface IFunction { Widget GetWidgetData(int code); } } When the time comes for a fundamental change to the service, I will introduce some classes like namespace Company.Product.V2 { [DataContract(Namespace = "company-product-v2")] public class Widget { [DataMember] int widgetCode; [DataMember] int widgetExpiry; } public interface IFunction { Widget GetWidgetData(int code); } } The advantages as I see it are that I will be able to have a single set of code serving both interface versions, sharing functionality where possible. This is because I will be able to reference both interface versions as a distinct set of C# objects. Similarly, clients may use both interface versions simultaneously, perhaps using V1.Widget in some legacy code whilst new bits move on to V2.Widget. Can anyone tell why this is a stupid idea? I have a nagging feeling that this is a bit smelly.. notes: I am obviously not proposing every single new version of the service would be in a new namespace. Presumably I will do as many non-breaking interface changes as possible, but I know that I will hit a point where all the data modelling will probably need a significant rewrite. I understand assembly versioning etc but I think this question is tangential to that type of versioning. But I could be wrong.

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  • Integrating Pentaho/Talend/etc. with an OR Mapper

    - by DaDaDom
    We have an application (Java) with an own OR mapper. Within this system we have what can be compared to Hibernate's interceptors (we call it triggers): Do specific actions just before saving data in the database, after it's deleted and so on. The underlying database is MySQL. Now we would like to use tools such as Pentaho Data Integration or Talend to convert data to put it into our system. It's no problem to do that directly on the SQL level, but by doing so we loose the built-in power of our triggers. Is there a way to somehow integrate any of the Data Integration solutions into our existing application? It would be great if there was a way to write into instances of our classes instead of writing into the database directly. Any hints welcome :-)

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  • How to use/manipulate return value from nested boost::bind

    - by JQ
    I have two functions: 1. A & DataSource(); 2. void DataConsumer( A * ); What I want to achieve: Using one statement to assemble them into one functor. I have tried: 1. boost::function< void() func( boost::bind( DataConsumer, & boost::bind( DataSource ) ) ); certainly it didn't work, compiler says it can not convert 'boost::_bi::bind_t ' to 'A *' 2. boost::function< void() func( boost::bind( DataConsumer, boost::addressof( boost::bind( DataSource ) ) )); compiler says cannot convert parameter 1 from 'boost::_bi::bind_t' to 'A &' Question: how to use return value from the nested boost::bind ? or if you want to use boost::lambda::bind.

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  • django admin gives warning "Field 'X' doesn't have a default value"

    - by noam
    I have created two models out of an existing legacy DB , one for articles and one for tags that one can associate with articles: class Article(models.Model): article_id = models.AutoField(primary_key=True) text = models.CharField(max_length=400) class Meta: db_table = u'articles' class Tag(models.Model): tag_id = models.AutoField(primary_key=True) tag = models.CharField(max_length=20) article=models.ForeignKey(Article) class Meta: db_table = u'article_tags' I want to enable adding tags for an article from the admin interface, so my admin.py file looks like this: from models import Article,Tag from django.contrib import admin class TagInline(admin.StackedInline): model = Tag class ArticleAdmin(admin.ModelAdmin): inlines = [TagInline] admin.site.register(Article,ArticleAdmin) The interface looks fine, but when I try to save, I get: Warning at /admin/webserver/article/382/ Field 'tag_id' doesn't have a default value

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  • Strange behaviour of switch case with boolean value

    - by Nikhil Agrawal
    My question is not about how to solve this error(I already solved it) but why is this error with boolean value. My function is private string NumberToString(int number, bool flag) { string str; switch(flag) { case true: str = number.ToString("00"); break; case false: str = number.ToString("0000"); break; } return str; } Error is Use of unassigned local variable 'str'. Bool can only take true or false. So it will populate str in either case. Then why this error? Moreover this error is gone if along with true and false case I add a default case, but still what can a bool hold apart from true and false? Why this strange behaviour with bool variable?

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  • Groovy on Grails: GORM and BitSets?

    - by Visionary Software Solutions
    I don't see anything in the official documentation about unsupported persistence data types, so I'm working under the assumption that types available in the Groovy language should be handled. However, for the following domain class: class DocGroupPermissions { Workgroup workgroup; Document document; BitSet permissions = new BitSet(2) public DocGroupPermissions() {} void setPermissions(boolean canRead, boolean canWrite){ setReadPermissions(canRead) setWritePermissions(canWrite) } BitSet getPermissions() { return permissions } void setReadPermissions(boolean canRead) { permissions.set(0,canRead) } void setWritePermissions(boolean canWrite) { permissions.set(1,canWrite) } boolean getReadPermissions() { return permissions.get(0) } boolean getWritePermissions() { return permissions.get(1) } static belongsTo = [workgroup:Workgroup, document:Document] static constraints = { workgroup(nullable:false, blank:false) document(nullable:false, blank:false) } } I'm getting: 2009-11-15 16:46:12,298 [main] ERROR context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.MappingException: An association from the table doc_group_permissions refers to an unmapped class: java.util.BitSet Has anyone run into this before?

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  • ASP.NET MVC 2.0: How to read querystring value

    - by Shyju
    I am trying to build a small ASP.NET MVC 2 application.I have a controller class with the below method in it public ActionResult Index() { TestMvc.Models.PersonalInformation objPerson = new TestMvc.Models.PersonalInformation(); objPerson.FirstName = "Shyju"; objPerson.LastName = "K"; objPerson.EmailId="[email protected]"; return View(objPerson); } And when the page (View) being called, i can see this data there as my view has these data's displaying. Now i want to know how can i pass a query string in the url and use that id to build the PersonalInformation object.Hoe can i read the querystring value ? Where to read ? I want the quesrtstring to be like http://www.sitename/user/4234 where 4234 is the user id

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  • save and restore state of a tab bar controller

    - by phunehehe
    I have an application that has a UITabBarController with two tabs, each having its own navigation controller. Now I want to store the state of the application when the user closes it, so that when the user relauches the application will show the same place as the last time before it was closed. So, in applicationWillTerminate: I have [NSKeyedArchiver archiveRootObject:tabBarController toFile:@"lastVisitedTab"]; Then, in applicationDidFinishLaunching: I have UITabBarController *last= (UITabBarController *)[NSKeyedUnarchiver unarchiveObjectWithFile:@"lastVisitedTab"]; if (last) tabBarController = [last retain]; I also have an extension to UIImage to make it compliant to NSCoding. However, this doesn't work, as the state is not preserved. The first tab gets selected all the time, and no navigation is preserved either. Can someone tell me what's wrong, or show me how to do it correctly?

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  • How do I ignore set and get when assigning or retrieving a value?

    - by cbsch
    Hello. Is it possible to ignore set and get when I'm assigning to or retrieving a value? In specific, I'm inheriting from a class that has a property declared like this: public Int32 Value { get; set; } What I'd like to do is to override it and do something useful in those set and get's. The problem appears when I override it, I also have to manually assign, or return the value from the property. If I do something like this: override public Int32 Value { get { return this.Value; } set { this.Value = value; // do something useful } Then I'm creating an infinite loop. Is there a way to set or get the value without invoking the code in set and get, or do I have to make a separate name for the actual variable?

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  • Default value list for pipeline param in Powershell

    - by fatcat1111
    I have a Powershell script that reads values off of the pipeline: PARAM ( [Parameter(ValueFromPipeline = $true)] $s ) PROCESS { echo "* $s" } Works just fine: PS my.ps1 foo * foo I would like the script to have list of default values, as the most common usage will always use the same values and storing them in the default will be most convenient. I did the usual assignment: PARAM ( [Parameter(ValueFromPipeline = $true)] $s = 'bar' ) PROCESS { echo "* $s" } Again, works just fine: PS my.ps1 * bar PS my.ps1 foo * foo However when setting the default to be a list, I get back something entirely reasonable but not at all what I want: PARAM ( [Parameter(ValueFromPipeline = $true)] $s = @('bar', 'bat', 'boy') ) PROCESS { echo "* $s" } Result: PS my.ps1 * bar bat boy I expected: PS my.ps1 * bar * bat * boy How can I get one call in to the Process loop for each default value? (This is somewhat different than getting one call in to Process, and wrapping the current body of in a big foreach loop over $s).

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  • Google SpreadSheets - When using a time trigger in code, some cells getting '#N/A' value

    - by Robi
    I've created a Google spreadsheet with imported data on one cell, extracting specific string to another cell and pasting the data in a table with a trigger for every 2 hours. Now everything works perfectly when running the script manually but when logged out and waiting for the cells to fill, sometimes the pasted cell getting "#N/A" value. Here is the code I'm using: function PasteV(){ var ss = SpreadsheetApp.getActiveSpreadsheet(); var sheet = ss.getSheets()[0]; var timestamp= sheet.getRange("D1").getValue(); var sale= sheet.getRange("G1").getValue(); var rent= sheet.getRange("J1").getValue(); sheet.appendRow([timestamp, rent, sale]); } Again when running manually countless times - no problem. I'll appreciate your help. Thanks.

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  • Subclassing Satchmo's Category model, but then getting the error "'Manager' object has no attribute 'root_categories'"

    - by hellsgate
    I'm using Satchmo as part of a website I'm currently building. At the moment I'm trying add more functions to the Satchmo Category class, but obviously I'm not going to make any changes to the Satchmo files. So, I thought that subclassing the Category class would give me a new class which contains all the Satchmo Category properties and methods while allowing me to add my own. However, either Python subclassing doesn't work like that, or I am doing it wrong. Here is the code I'm using to subclass Category: from product.models import Category class MyCategory(Category): """ additional functions to pull data from the Satchmo store app """ One of the methods I can normally use from the Category class is: Category.objects.root_categories() however, when I try to access MyCategory.objects.root_categories() I get the following error: AttributeError: 'Manager' object has no attribute 'root_categories' Can anyone point me in the right direction for solving this?

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  • C#/ASP.NET MVC 4 Instantiate Object Derived From Interface In Factory Method

    - by Chris
    Currently have a Factory class that features a GetSelector function, which returns a concrete implementation of ISelector. I have several different classes that implement ISelector and based on a setting I would like to receive the appropriate ISelector back. public interface ISelector { string GetValue(string Params); } public class XmlSelector : ISelector { public string GetValue(string Params) { // open XML file and get value } } public static class SelectorFactory { public static ISelector GetSelector() { return new XmlSelector(); // Needs changing to look at settings } } My question is what is the best way to store the setting? I am aware of using AppSettings etc. but I'm not sure whether I want to have to store strings in the web.config and perform a switch on it - just seems to be really tightly coupled in that if a new implementation of ISelector is made, then the Factory would need to be changed. Is there any way of perhaps storing an assembly name and instantiating based on that? Thanks, Chris

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  • rails accessing value from facebooker hash/array

    - by Ben
    This is my first time using the facebooker plugin with rails, and I'm having trouble accessing user info. The website uses FB connect to authenticate users. I am trying to get the name of the university that the logged in user attends. When I use the command <%= facebook_session.user.education_history[:name] %>, I get an error "Symbol as array index". I have also tried using education_history[1], but that just returns "# Facebooker::EducationInfo:<some sort of alphanumeric hash value>" When I use something like <%= facebook_session.user.relationship_status %> , it returns the relationship status just fine. Similarly, <%= facebook_session.user.hometown_location.city %> returns the city name just fine. I've checked out the documentation for facebooker, but I can't figure out the correct way to get the values I need. Any idea on how to get this to work? Thanks!

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  • Getting "value is not defined" while inheriting a type

    - by James Black
    I can't see what I am doing wrong, as the files are in the correct order. In this case it is: BaseDAO.fs CreateDatabase.fs They are in the same namespace, but even when I had them in different modules, and opened the module in CreateDatabase the same error. The error is: Error 1 The value or constructor 'execNonQuery' is not defined I am trying to inherit BaseDAO and use a member that will be common to several files, and I don't see why I get the error above. namespace RestaurantServiceDAO open MySql.Data.MySqlClient type BaseDAO() = let connString = @"Server=localhost;Database=mysql;Uid=root;Pwd=$$$$;" let conn = new MySqlConnection(connString) member self.execNonQuery(sqlStr) = conn.Open() let comm = new MySqlCommand(sqlStr, conn, CommandTimeout = 10) comm.ExecuteNonQuery |> ignore comm.Dispose |> ignore The type that does inherit is here, and execNonQuery is not defined. namespace RestaurantServiceDAO open MySql.Data.MySqlClient type CreateDatabase() = inherit BaseDAO() let createRestaurantTable conn = execNonQuery "CREATE TABLE restaurant(id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, name VARCHAR(100), cur_timestamp TIMESTAMP(8))"

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  • Reference Error for property of Javascript Object

    - by Jeremy Petzold
    I have built an object in Javascript on the Google Apps Script engine and every time I run my script I get a reference error saying uName is not defined. Here is the relivant code: function DataSet() { this.uName = ""; this.dFeild = ""; this.qUrl = "http://api.bfbcs.com/api/pc?players="+uName+"&fields="+dFeilds; this.data = ""; this.dQuery = dQuery; this.execQuery = execQuery; According to all sources I have found, I should not need to use the keyword var, and when I do include that, it throws other errors. What could be going on? Thanks

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  • Add attribute to embed tag using jquery

    - by Rob
    I have the following embed tag: <embed type="application/x-shockwave-flash" width="640" height="505" src="url_to_video" allowscriptaccess="always" allowfullscreen="true"></embed> I have about five of theses on a page, and I'd like to add the attribute wmode="opaque" to all of them. However, I tried to do it like this and it didnt' work: $j("embed").attr('wmode','opaque'); Is there another way I can dynamically set the attribute wmode="opaque" ? Thanks!

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  • Objective C Array and Object Release

    - by david
    Hi, I have a newbie question regarding when to release the elements of a NSArray. See following pseudo code: NSMutalbeArray *2DArray = [[NSMutableArray alloc] initWithCapacity:10]; for (int i=0;i<10;i++) { NSMutableArray *array = [[MSMutableArray alloc] initWithCapacity:5]; for (int j=0;j<5;j++) { MyObject *obj = [[MyObject alloc] init]; [array addObject:obj]; [obj release]; } [2DArray addObject:array]; [array release]; } // use 2DArray to do something [2DArray release] My question here is, when I release 2DArray, do I need to explicitly release each of its element (array) first? Also, before I release the "array" object, do I need to release each of its element (MyObject) first? I am new to Objective C. Please help. thanks.

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  • When Drag a object from one div to another , format gets changed

    - by Anuj
    When a object is dragged and dropped from one div to another, the format in li gets changes to text only. I want it in the same format i.e 'li' after droping it. $(function() { $( "#catalog ul" ).sortable({ zIndex: 10000, revert: true }); $( "#catalog" ).accordion(); $( "#catalog ul" ).draggable({ appendTo: "body", helper: "clone", zIndex: 10000 }); $( "#dialogIteration ol" ).droppable({ activeClass: "ui-state-default", hoverClass: "ui-state-hover", drop: function( event, ui ) { $( this ).find( ".placeholder" ).remove(); $( "<li></li>" ).text( ui.draggable.text() ).appendTo( this ); } }).sortable({ items: "li:not(.placeholder)", sort: function() { // gets added unintentionally by droppable interacting with sortable // using connectWithSortable fixes this, but doesn't allow you to customize active/hoverClass options $( this ).removeClass( "ui-state-default" ); } }); $( "ul, li" ).disableSelection(); $("#dialogIteration").dialog(); }); Demo: http://jsfiddle.net/coolanuj/7683X/7/

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  • Access COM object through a windows process handle.

    - by Sivvy
    I'm currently automating an application at work using COM, and have an issue where anyone using my application has a problem if the original application is already open when my application runs. I know how to locate the process if it's open, but instead of having to worry about closing it, or working around it, etc., I want to try to use the existing application instead of opening a new one. This is how I normally start the application in my automation program: Designer.Application desApp = new Designer.Application(); Now I'm attempting to try and use the handle from an existing application: Designer.Application desApp = (Designer.Application)((System.Diagnostics.Process.GetProcessesByName("Designer.exe")[0]).Handle) (I know this doesn't work, since .Handle returns an IntPtr, but I'm using it as an example.) Is there any way to accomplish this? How do I return a usable object if I know the handle/process?

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  • Java: design problem with final-value and empty constructor

    - by HH
    $ javac InitInt.java InitInt.java:7: variable right might not have been initialized InitInt(){} ^ 1 error $ cat InitInt.java import java.util.*; import java.io.*; public class InitInt { private final int right; // Design Problem? // I feel the initialization problem is just due to bad style. InitInt(){} InitInt{ // Still the error, "may not be initialized" // How to initialise it? if(snippetBuilder.length()>(charwisePos+25)){ right=charwisePos+25; }else{ right=snippetBuilder.length()-1; } } public static void main(String[] args) { InitInt test = new InitInt(); System.out.println(test.getRight()); } public int getRight(){return right;} } Partial Solutions and Suggestions use "this" to access methods in the class, instead of creating empty constructor change final to non-final with final field value: initialize all final values in every constructor remove the empty constructor, keep your code simple and clean

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