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  • List method creation

    - by Jonathan D
    I'm creating a list of my defined objects like so List<clock> cclocks = new List<clocks>(); for each object in the list i'm calling a method moveTime, like so foreach(clock c in cclocks) { c.moveTime(); } is the a way i can write some cleaver thing so i can call cclocks.moveTime(); it would then go though the list doing that method I guess I want to create a collection method? I'm guessing there must be some thing I can do I just don't know what. thanks for your help

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  • Why is Decimal('0') > 9999.0 True in Python?

    - by parxier
    This is somehow related to my question Why is ''0 True in Python? In Python 2.6.4: >> Decimal('0') > 9999.0 True From the answer to my original question I understand that when comparing objects of different types in Python 2.x the types are ordered by their name. But in this case: >> type(Decimal('0')).__name__ > type(9999.0).__name__ False Why is Decimal('0') > 9999.0 == True then? UPDATE: I usually work on Ubuntu (Linux 2.6.31-20-generic #57-Ubuntu SMP Mon Feb 8 09:05:19 UTC 2010 i686 GNU/Linux, Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1] on linux2). On Windows (WinXP Professional SP3, Python 2.6.4 (r264:75706, Nov 3 2009, 13:23:17) [MSC v.1500 32 bit (Intel)] on win32) my original statement works differently: >> Decimal('0') > 9999.0 False I even more puzzled now. %-(

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  • Calculating terrain height in 3d-space

    - by Jonas B
    Hi I'm diving into 3d programming a bit and am currently learning by writing a procedural terrain generator that generates terrain based on a heightmap. I would also want to implement some physics and my first attempt at terrain collision was by simply checking the current position vs the heightmap. This however wont work well against small objects as you'd have to calculate the height by taking the heightdifference of the nearest vertices of the object and doing this every colision check is pretty slow. Beleive me I tried googling for it but there's simply so much crap and millions of blogs posting ripped-of newbie tutorials everywhere with basically no real information on the subject, I can't find anything that explains it or even names any generally used techniques. I'm not asking for code or a complete solution, but if anyone knows a particular technique good for calculating a high-res heightmap out of the already generated and smoothed terrain I would be very happy as I could look into it further when I know what I'm looking for. Thanks

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  • Java HashSet is allowing dupes; problem with comparable?

    - by IVR Avenger
    Hi, all. I've got a class, "Accumulator", that implements the Comparable compareTo method, and I'm trying to put these objects into a HashSet. When I add() to the HashSet, I don't see any activity in my compareTo method in the debugger, regardless of where I set my breakpoints. Additionally, when I'm done with the add()s, I see several duplicates within the Set. What am I screwing up, here; why is it not Comparing, and therefore, allowing the dupes? Thanks, IVR Avenger

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  • Sharing code between sqlite-net and servicestack ormlite?

    - by lanks
    I am using sqlite-net to store data on my MonoDroid mobile application. I am wanting to sync this data with a server side service as well. Would it be possible to share the code for my Entity objects between sqlite-net and Servicestacks ormlite? The main difference between the two that I can see is declaring the "using namespace" statements at the top of the class for the object. Is it possible to detect the platform and set the using statements based on the platform? The other difference would be referencing the different dlls for servicestack so I suppose on the mobile app it would not compile if there are references to the servicestack namespaces... What would a good approach be to achieve sharing of this code?

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  • Exception "Illegal attempt to associate a collection with two open sessions" when saving object

    - by Alex
    I am using CastleProject ActiveRecord and I use lazy load feature of this ORM. In order to make lazy load work, it is required to create SessionScope. I do this in Program.cs: public static SessionScope sessionScope; private static void InitializeActiveRecord() { ActiveRecordStarter.Initialize(); sessionScope = new SessionScope(); } This works fine for loading, however, when I try to save my objects, I get an exception saying "Illegal attempt to associate a collection with two open sessions". I guess this is due to the fact that I created one session myself. How to avoid this exception?

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  • Creating Dynamic variables from json response

    - by c0mrade
    My JSON response looks like this : {"sample":[{"id":"2","name":"branch name"},{"id":"3","name":"branch name 2"}]} My function looks like this : function getJSONObjects(){ $.getJSON("http://localhost/api/branches", function(data){ $.each(data.sample, function(i,item){ var loc = "branch"; eval("var " + loc + item.id + "=123;"); alert(loc + item.id); }); }); } The idea is to create branch + id object so I can do something with it(create marker on a map), so I tried to assign it any value to see if this was working. I wanted both branch2 and branch3 to alert 123 so I have something to start with. But currently this alerts branch2 and branch3 instead of 123. I have little experience with creating dynamic variables/objects can someone tell me what I'm doing wrong or maybe another approach towards solving this?

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  • Data Access Layer in ASP.Net: Where do I create the Connection?

    - by atticae
    If I want to create a 3-Layer ASP.Net application (Presentation Layer, Business Layer, Data Access Layer), where is the best place to create the Connection objects? So far I used a helper class in my Presentation Layer to create an IDbCommand from the ConnectionString in the web.config on each page and passed it on to the DAL classes/methods. Now I am not so sure, if this part shouldn't also be included in the DAL somehow, because it obviously is part of the Data Access. The DAL is in a separately compilated project, so I dont have access to the web.config and cannot access the connection string (right?). What is the best practice here?

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  • MVC without ORM is not real MVC?

    - by ajsie
    at the moment im integrating ORM (doctrine) into a MVC framework (codeigniter). then it hit me that this was the obvious way of setting up a MVC: the controller calls the models that are representing database tables. look at this picture: MVC + ORM then i wondered, how can a MVC without ORM be real MVC? cause then the models are not real objects, rather aggregations of different functions that perform CRUD, then returning the result to the controller. and there is no need for a state (object properties) i guess so the functions would be all static? correct me if im wrong on this one. i guess a lot of people are using models without ORM. please share your thoughts. how do your models look like?

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  • GWT complex app, many screens. Architecture?

    - by Kurian
    I'm making a GWT application which will have many screens. There will be a menu on the left and clicking a menu option will open the relevant module in the right side content area. Clicking on items in the content area will link to other modules that open in the same content area. How do I implement this architecture? How do I pass objects between the different content modules? How do I isolate each module into its own package? Can all of these be within the same Eclipse project? Anything else that should be considered?

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  • JSON documents and SQL database tables

    - by Sharmi
    Do JSON documents in RavenDB cost more than the SQL Server tables in terms of the storage and query costs. And also for centralized access, which one is better? What are the disadvantages of NON-SQL databases like RavenDB,CouchDB,MongoDB, etc... ? I can get that some of these are open source and support more datatypes like enums,objects,etc. but otherwise i don't see any big advantage? Currently there is a problem of storing huge amount of logs from various locations. I am planning to suggest these to my manager so just need a clear idea.

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  • Test for external undefined references in Linux

    - by Charles
    Is there a built in linux utility that I can use to test a newly compiled shared library for external undefined references? Gcc seems to be intelligent enough to check for undefined symbols in my own binary, but if the symbol is a reference to another library gcc does not check at link time. Instead I only get the message when I try to link to my new library from another program. It seems a little silly to get undefined reference messages in a library when I am compiling a different project so I want to know if I can do a check on all references internal and external when I build the library not when I link to it. Example error: make -C UnitTests debug make[1]: Entering directory `~/projects/Foo/UnitTests` g++ [ tons of objects ] -L../libbar/bin -lbar -o UnitTests libbar.so: undefined reference to `DoSomethingFromAnotherLibrary` collect2: ld returned 1 exit status make[1]: *** [~/projects/Foo/UnitTests] Error 1

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  • Linq to SQL Azure generating Error "Specified cast is not valid."

    - by Rabbi
    B"H I have an application that has been working for months using Linq to SQL connecting to a SQLExpress. I tried migrating it to SQL Azure. I copied the structure and data using the Sync Framework. I viewed the data in SQL Azure using SSMS 2008 R2 and it seams to be exactly what I have in my Sql Server. However when I try to use Linq to SQL against it I get an error "Specified cast is not valid." I seams to be happening any time I get child records. i.e. whenever I fill (the first time I access) an entity set. It seams to be happening after the data returns and when Linq tries to put it into the objects. Remember, the application is working perfectly against sqlexpress, even when accessed across the internet or vpn.

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  • does a switch idiom make sense in this case?

    - by the ungoverned
    I'm writing a parser/handler for a network protocol; the protocol is predefined and I am writing an adapter, in python. In the process of decoding the incoming messages, I've been considering using the idiom I've seen suggested elsewhere for "switch" in python: use a hash table whose keys are the field you want to match on (a string in this case) and whose values are callable expressions: self.switchTab = { 'N': self.handleN, 'M': self.handleM, ... } Where self.handleN, etc., are methods on the current class. The actual switch looks like this: self.switchTab[selector]() According to some profiling I've done with cProfile (and Python 2.5.2) this is actually a little bit faster than a chain of if..elif... statements. My question is, do folks think this is a reasonable choice? I can't imagine that re-framing this in terms of objects and polymorphism would be as fast, and I think the code looks reasonably clear to a reader.

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  • Does Microsoft hate firefox? ASP.Net gridview performance in firefox bug?

    - by Maxim Gershkovich
    Could someone please explain the significant difference in speed between a firefox updatepanel async postback and one performed in IE? Average Firefox Postback Time For 500 objects: 1.183 Second Average IE Postback Time For 500 objects: 0.295 Seconds Using firebug I can see that the majority of this time in FireFox is spent on the server side. A total of 1.04 seconds. Given this fact the only thing I can assume is causing this problem is the way that ASP.Net renders its controls between the two browsers. Has anyone run into this problem before? VB.Net Code Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click GridView1.DataBind() End Sub Public Function GetStockList() As StockList Dim res As New StockList For l = 0 To 500 Dim x As New Stock With {.Description = "test", .ID = Guid.NewGuid} res.Add(x) Next Return res End Function Public Class Stock Private m_ID As Guid Private m_Description As String Public Sub New() End Sub Public Property ID() As Guid Get Return Me.m_ID End Get Set(ByVal value As Guid) Me.m_ID = value End Set End Property Public Property Description() As String Get Return Me.m_Description End Get Set(ByVal value As String) Me.m_Description = value End Set End Property End Class Public Class StockList Inherits List(Of Stock) End Class Markup <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <script type="text/javascript" language="Javascript"> function timestamp_class(this_current_time, this_start_time, this_end_time, this_time_difference) { this.this_current_time = this_current_time; this.this_start_time = this_start_time; this.this_end_time = this_end_time; this.this_time_difference = this_time_difference; this.GetCurrentTime = GetCurrentTime; this.StartTiming = StartTiming; this.EndTiming = EndTiming; } //Get current time from date timestamp function GetCurrentTime() { var my_current_timestamp; my_current_timestamp = new Date(); //stamp current date & time return my_current_timestamp.getTime(); } //Stamp current time as start time and reset display textbox function StartTiming() { this.this_start_time = GetCurrentTime(); //stamp current time } //Stamp current time as stop time, compute elapsed time difference and display in textbox function EndTiming() { this.this_end_time = GetCurrentTime(); //stamp current time this.this_time_difference = (this.this_end_time - this.this_start_time) / 1000; //compute elapsed time return this.this_time_difference; } //--> </script> <script type="text/javascript" language="javascript"> var time_object = new timestamp_class(0, 0, 0, 0); //create new time object and initialize it Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler); Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler); function BeginRequestHandler(sender, args) { var elem = args.get_postBackElement(); ActivateAlertDiv('visible', 'divAsyncRequestTimer', elem.value + ''); time_object.StartTiming(); } function EndRequestHandler(sender, args) { ActivateAlertDiv('visible', 'divAsyncRequestTimer', '(' + time_object.EndTiming() + ' Seconds)'); } function ActivateAlertDiv(visstring, elem, msg) { var adiv = $get(elem); adiv.style.visibility = visstring; adiv.innerHTML = msg; } </script> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <Triggers> <asp:AsyncPostBackTrigger ControlID="Button1" EventName="click" /> </Triggers> <ContentTemplate> <asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1"> </asp:UpdateProgress> <asp:Button ID="Button1" runat="server" Text="Button" /> <div id="divAsyncRequestTimer" style="font-size:small;"> </div> <asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource1" AutoGenerateColumns="False"> <Columns> <asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" /> <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" /> </Columns> </asp:GridView> <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetStockList" TypeName="WebApplication1._Default"> </asp:ObjectDataSource> </ContentTemplate> </asp:UpdatePanel> </form>

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  • Setting tabindex in dynamic table vertically then horizontally

    - by Wil
    I have a page that is currently generating dynamically created textboxes in a table format. The users are requesting that the tab order be changed from horizontal-vertical to vertical-horizontal. I know that you can use the tabindex attribute to control the tab ordering, but I can't for the life of me figure out the right way to get the sequential number properly for the textboxes. I guess this is more of a math question than anything else! FYI, the textboxes are made while looping two different collections. First collection looped to make the rows, for each row, second collection (which is a property of the first collection objects) is looped to create the columns. Any help would be greatly appreciated. Thanks!

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  • How to implement file transfer with Java sockets?

    - by ZeKoU
    Hello, I am working on a chat implementation with Java sockets. I have focused on few functionalities, like authentication, one person chat and a group chat. I was thinking about adding file transfer functionality, and I wonder what's the good practice about this. Should I have separate socket on the server with different port listening just for file transfers? Right now input and output streams that I get from server socket are binded to Scanner and PrintWriter objects respectively, so I find it hard to use that for file transfer. Any patterns you guys could recommend or give me good recommendations are very appreciated. Thanks, ZeKoU

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  • how to modify a json array with jQuery

    - by Emin
    I have the following json array of objects in my code var groups = [ { "gid": 28, "name": "Group 1", "ishidden": false, "isprivate": false }, { "gid": 16, "name": "Group 2", "ishidden": true, "isprivate": false }, { "gid": 31, "name": "Group 3", "ishidden": true, "isprivate": false }, { "gid": 11, "name": "Group 4", "ishidden": false, "isprivate": false }, { "gid": 23, "name": "Group 5", "ishidden": false, "isprivate": false } ]; I can access or iterate through this with no problm using jQuery. However a situation arose where I need to change a value of one of the items (e.g. change the ishidden property to true for gid: 28) and then run some other jQuery function against it. Is this possible? or do I have to re-build the whole object ? If possible, how can I achieve this? any help would be appreciated!

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  • How useful is a 'pure' MVC implementation?

    - by Matt1776
    I work at a company that provides custom made 'CRM'-like software. We are currently redesigning/redeveloping the software with the hopes that it will look more modern and be easier to develop and customize for future clients. Currently it takes a long time to customize each new application. There is a presumption that the reason it takes so long is because of the amount of business logic that is present in the 'view' layer. To some extent I can vouch for this being true, but symptoms don't always reliably point out a cause. There was a suggestion that if we just move the business logic to the controller layer and use pure view (we use java J2EE and struts) as in implementing struts tags instead of calling the bean layer and iterating objects right on the jsp - etc etc. Before I start advocating we go forward with this, I wanted to get a feeling for what other people thought. Does a "pure" implementation of the MVC (especially emphasis on decoupling the controller and the view) provide a cleaner, easier to develop and change code base?

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  • Implementing simple business model in Haskell

    - by elmes
    Supose we have a very simple model: Station has at least one Train Train has at least two Stations The model has to allow to check what stations any given train visits and to check what trains visit a particular station. How to model it in Haskell? I am a Haskell newbie, so please correct me: once an object is created, you cannot modify it - you can only make a new object based on that one (~immutability). Am I right? If so, I'll have to create a lot of temporary variables with semi-initialized objects (during deserialization or even in unit tests). Basically what I need is an example of modeling domain classes in Haskell - after reading "Learn you a haskell.." I still have no idea how to use this language.

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  • Arrays/Lists and computing hashvalues (VB, C#)

    - by Jeffrey Kern
    I feel bad asking this question but I am currently not able to program and test this as I'm writing this on my cell-phone and not on my dev machine :P (Easy rep points if someone answers! XD ) Anyway, I've had experience with using hashvalues from String objects. E.g., if I have StringA and StringB both equal to "foo", they'll both compute out the same hashvalue, because they're set to equal values. Now what if I have a List, with T being a native data type. If I tried to compute the hashvalue of ListA and ListB, assuming that they'd both be the same size and contain the same information, wouldn't they have equal hashvalues as well? Assuming as sample dataset of 'byte' with a length of 5 {5,2,0,1,3}

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  • Powershell's import-clixml from string

    - by rocku
    Is there any way to run import-clixml cmdlet on a string or xml object? It requires a file path as input to produce ps objects and can't get input from an xml object. Since there is convertto-xml cmdlet which serializes ps object into xml object, why isn't there a convertfrom-xml, which would do the opposite? I am aware of System.Xml.Serialization.XmlSerializer class which would do just that, however I would like to stick with cmdlets to do this. Is there any way to do this with cmdlets (probably just with import-clixml), without creating temporary files?

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  • Changing the color of a Rebol button

    - by Dave Matuszek
    I want to ask multiple choice questions in Rebol. Possible answers will be on buttons. I want to turn a button red when it is clicked and it is the wrong answer. When the correct button is pressed, I want to proceed to the next question. I can change the color of a box (mybox/color: red show mybox). I can set up a toggle with two colors (but I can't change it based on the result of an arbitrary test (is the answer correct?). It seems like there is probably a simple way to change the color of a button, without having to create my own button-like face objects. Isn't there?

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  • Core Data: Multiple conditions inside relational aggregate operations

    - by Uzaak
    I have an SQLite table used by Core Data with the following elements: Name: John LastName: Foobar Age: 23 Name: Bob LastName: Baz Age: 37 Name: Peter LastName: Fooqux Age: 32 Name: John LastName: Bar Age: 29 Those are all in a to-many relationship from another object "Company". I need to query the database and retrieve all Company objects with employees called "John" but whose last name does NOT contain "Foo". I did go as far as to make the following predicate: [NSPredicate predicateWithFormat:@"ANY employee.name = 'John'"]; How do I get to filter only by companies whose Johns don't have "Foo" in their last names?

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  • running requestAnimationFrame from within a new object

    - by JVE999
    I'm having trouble running an animation. This is inside var ob1 = function() {};. When called, it runs for a while and then I get the error Uncaught RangeError: Maximum call stack size exceeded. However, this same structure has no problems running outside of the object. /////////////// Render the scene /////////////// this.render = function (){ renderer.render(scene,camera); if(isControls == true) controls.update(clock.getDelta()); this.animate(); //console.log(true); requestAnimationFrame(this.render()); } /////////////// Update objects /////////////// this.animate = function (){ console.log("!"); }

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