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  • dynamic access magic constants in php

    - by Radu
    Hello, Is there a way to shortcut this: function a($where){ echo $where; } function b(){ a(basename(__FILE__).'::'.__FUNCTION__.'()::'.__LINE__); } to something like this: define("__myLocation__", ''.basename(__FILE__).'::'.__FUNCTION__.'()::'.__LINE__.''); function a($where){ echo $where; } function b(){ a(__mYLocation_); } I know that this cannot be done with constants (is just an theoretical example), but I can't find a way to shorthen my code. If a use a function to get my line it will get the line where that function is not the line from where the function was called. I usualy call a function that prints directly to the log file, but in my log I need to know from where the function was called, so i use basename(__FILE__).'::'.__FUNCTION__.'()::'.__LINE__ this will print something like: index.php::b()::6 It is a lot of code when you have over 500 functions in different files. Is there a shorten or better way to do this? Thank you.

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  • Is it weird or strange to make multiple WCF Calls to build a ViewModel before presenting it?

    - by Nate Bross
    Am I doing something wrong if I need code like this in a Controller? Should I be doing something differently? public ActionResult Details(int id) { var svc = new ServiceClient(); var model = new MyViewModel(); model.ObjectA = svc.GetObjectA(id); model.ObjectB = svc.GetObjectB(id); model.ObjectC = svc.GetObjectC(id); return View(model); } The reason I ask, is because I've got Linq-To-Sql on the back end and a WCF Service which exposes functionality through a set of DTOs which are NOT the Linq-To-Sql generated classes and thus do not have the parent/child properties; but in the detail view, I would like to see some of the parent/child data.

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  • Is multithreading the right way to go for my case?

    - by Julien Lebosquain
    Hello, I'm currently designing a multi-client / server application. I'm using plain good old sockets because WCF or similar technology is not what I need. Let me explain: it isn't the classical case of a client simply calling a service; all clients can 'interact' with each other by sending a packet to the server, which will then do some action, and possible re-dispatch an answer message to one or more clients. Although doable with WCF, the application will get pretty complex with hundreds of different messages. For each connected client, I'm of course using asynchronous methods to send and receive bytes. I've got the messages fully working, everything's fine. Except that for each line of code I'm writing, my head just burns because of multithreading issues. Since there could be around 200 clients connected at the same time, I chose to go the fully multithreaded way: each received message on a socket is immediately processed on the thread pool thread it was received, not on a single consumer thread. Since each client can interact with other clients, and indirectly with shared objects on the server, I must protect almost every object that is mutable. I first went with a ReaderWriterLockSlim for each resource that must be protected, but quickly noticed that there are more writes overall than reads in the server application, and switched to the well-known Monitor to simplify the code. So far, so good. Each resource is protected, I have helper classes that I must use to get a lock and its protected resource, so I can't use an object without getting a lock. Moreover, each client has its own lock that is entered as soon as a packet is received from its socket. It's done to prevent other clients from making changes to the state of this client while it has some messages being processed, which is something that will happen frequently. Now, I don't just need to protect resources from concurrent accesses. I must keep every client in sync with the server for some collections I have. One tricky part that I'm currently struggling with is the following: I have a collection of clients. Each client has its own unique ID. When a client connects, it must receive the IDs of every connected client, and each one of them must be notified of the newcomer's ID. When a client disconnects, every other client must know it so that its ID is no longer valid for them. Every client must always have, at a given time, the same clients collection as the server so that I can assume that everybody knows everybody. This way if I'm sending a message to client #1 telling "Client #2 has done something", I know that it will always be correctly interpreted: Client 1 will never wonder "but who is Client 2 anyway?". My first attempt for handling the connection of a new client (let's call it X) was this pseudo-code (remember that newClient is already locked here): lock (clients) { foreach (var client in clients) { lock (client) { client.Send("newClient with id X has connected"); } } clients.Add(newClient); newClient.Send("the list of other clients"); } Now imagine that in the same time, another client has sent a packet that translates into a message that must be broadcasted to every connected client, the pseudo-code will be something like this (remember that the current client - let's call it Y - is already locked here): lock (clients) { foreach (var client in clients) { lock (client) { client.Send("something"); } } } An obvious deadlock occurs here: on one thread X is locked, the clients lock has been entered, started looping through the clients, and at one moment must get Y's lock... which is already acquired on the second thread, itself waiting for the clients collection lock to be released! This is not the only case like this in the server application. There are other collections which must be kept in sync with the clients, some properties on a client can be changed by another one, etc. I tried other types of locks, lock-free mechanisms and a bunch of other things. Either there were obvious deadlocks when I'm using too much locks for safety, or obvious race conditions otherwise. When I finally find a good middle point between the two, it usually comes with very subtle race conditions / dead locks and other multi-threading issues... my head hurts very quickly since for any single line of code I'm writing I have to review almost the whole application to ensure everything will behave correctly with any number of threads. So here's my final question: how would you resolve this specific case, the general case, and more importantly: aren't I going the wrong way here? I have little problems with the .NET framework, C#, simple concurrency or algorithms in general. Still, I'm lost here. I know I could use only one thread processing the incoming requests and everything will be fine. However, that won't scale well at all with more clients... But I'm thinking more and more to go this simple way. What do you think? Thanks in advance to you, StackOverflow people which have taken the time to read this huge question. I really had to explain the whole context if I want to get some help.

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  • How do I run an XSLT file?

    - by Eric
    Alright this seems like a stupid question but I can't figure it out. I'm writing an XSLT file to translate an XML document into an XHTML document. I've used both Visual Studio and XML Notepad 2007 to preview the results of my XSLT file, but now I want to actually write out a real XHTML file so I can see how it looks in other browsers. Neither Visual Studio or XML NotePad have an obvious way to save the preview. Am I missing something. Obviously the file is getting created because something is being previewed, but I need to know where that file is being created or better yet choose its location.

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  • What's the easiest way for a Java Swing client to consumer a webservice?

    - by Stephane Grenier
    I have a Java Swing application client that I want to use to consume certain webservices, but I want to make it as painless as possible to code (because really all I want is the info). I do understand that whatever solution is used will need to stub the POJO's too. If you'd like to give a demo, that would be great, or if you can point to a tutorial that would also be really appreciated. I did look at Axis, including the more recent Axis2, but it's a bit more complex than I was hoping (aka. I have to learn something). At least just for some quick prototype testing and not real development, more for the sake of just saying I can, is there something or a tutorial out there?

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  • Newbie question attribute from associated table not showing up in index view

    - by Lauren
    Hi I know this is something simple I am doing wrong. I have three tables, installation, neighborhood, schools Installation: has_many :schools has_many :neighborhoods Neighborhood: has_many :installations has_many :schools Schools: belongs_to :installations belongs_to :neighborhoods I can't figure out how to show the name of the neighborhood the school is located in on the index view. I can get it to show on the show view once I have the school id. But on the index view I can't figure out what to put in the controller that will allow me to access the neighborhood name from the neighborhood_id that is in the School model. I am sure this is so easy and I am screwing up something stupid. HELP!

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  • Hooking a synchronous event handler on a form submit button in JS

    - by Xzhsh
    Hi, I'm working on a security project in javascript (something I honestly have not used), and I'm having some trouble with EventListeners. My code looks something like this: function prevclick(evt) { evt.preventDefault(); document.loginform.submitbtn.removeEventListener('click',prevclick,false); var req = new XMLHttpRequest(); req.open("GET","testlog.php?submission=complete",false); req.send(); document.loginform.submitbtn.click(); //tried this and loginform.submit() } document.loginform.submitbtn.addEventListener('click',prevclick,false); But the problem is, the submit button doesn't submit the form on the first click (it does, however, send the http request on the first click), and on the second click of the submit button, it works as normal. I think there is a problem with the synchronization, but I do need to have the request processed before forwarding the user to the next page. Any ideas on this would be great. Thanks in advance.

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  • Is it possible to use AutoMapper to wrap methods?

    - by Woj
    I have two classes: public class TestClass1 { public int TestInt { get; set; } public void TestMethod() { // Do something } } public class TestClass2 { public int TestInt { get; set; } public void TestMethod() { // Do something } } I want to create interface that I can use for both classes. The easiest solution is to implement the interface on TestClass1 and TestClass2 but I don;t have access to the implementation of these classes (external dll). I was wondering if I can create new interface and use AutoMapper to map TestClass1 and TestClass2 to ITestInterface: public interface ITestInterface { int TestInt { get; set; } void TestMethod(); }

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  • Creating an IF statement for datagrid value

    - by EvanRyan
    This is something I thought would be easier than it's turning out to be. For whatever reason, I can't seem to figure out a way to make what I'm trying to do here work with an If statement: List<int> miscTimes = new List<int>(); for (int i = 0; i < MISCdataGridView1.RowCount; i++) { if (MISCdataGridView1.Rows[i].Cells[2].Value == "Something") { miscTimes.Add(Convert.ToInt32(MISCdataGridView1.Rows[i].Cells[3].Value)); } } return miscTimes; For some reason, I can't get it to like anything I do with the if statement. I've tried converting to string and all of that. How should I go about this?

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  • C# xml Class to substitute ini files

    - by Eduardo
    Hi guys, I am learning Windows Forms in C#.NET 2008 and i want to build a class to work with SIMPLE xml files (config file like INI files), but i just need a simple class (open, getvalue, setvalue, creategroup, save and close functions), to substitute of ini files. I already did something and it is working but I am having trouble when I need to create different groups, something like this: <?xml version="1.0" encoding="utf-8"?> <CONFIG> <General> <Field1>192.168.0.2</Field1> </General> <Data> <Field1>Joseph</Field1> <Field2>Locked</Field2> </Data> </CONFIG> how can i specify that i want to read the field1 of [data] group? note that i have same field name in both groups (Field1)! I am using System.Linq, something like this: To open document: XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(FilePath); To save document: xmlDoc.Save(FilePath); To get value: public string getValue(string Field) { string result = ""; try { XmlNodeList xmlComum = xmlDoc.GetElementsByTagName(Field); if (xmlComum.Item(0) == null) result = ""; else result = xmlComum.Item(0).InnerText; } catch (Exception ex) { return ""; } return result; } To set value: public void setValue(string Group, string Field, string FieldValue) { try { XmlNodeList xmlComum = xmlDoc.GetElementsByTagName(Field); if (xmlComum.Item(0) == null) { xmlComum = xmlDoc.GetElementsByTagName(Group); if (xmlComum.Item(0) == null) { // create group createGroup(Group); xmlComum = xmlDoc.GetElementsByTagName(Group); } XmlElement xmlE = xmlDoc.CreateElement(Field); XmlText xmlT = xmlDoc.CreateTextNode(FieldValue); xmlE.AppendChild(xmlT); xmlComum.Item(0).AppendChild(xmlE); } else { // item already exists, just change its value xmlComum.Item(0).InnerText = Value; } xmlDoc.Save(FilePath); } catch (Exception ex) { } } The CreateGroup code: public void createGroup(string Group) { try { XmlElement xmlComum = xmlDoc.CreateElement(Group); xmlDoc.DocumentElement.AppendChild(xmlComum); xmlDoc.Save(FilePath); } catch (Exception ex) { } } Thank You!

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  • Converting digits, generated by weblog service, to Arabic form

    - by Sorush Rabiee
    sorry if this is irrelevance :-) I need to write something in my html code to convert digits of form 0123456789 to ?????????? (Persian digits uni06F0..uni06F9). the number of visitors is generated by blog service. and I want to convert its digits to Arabic. Counter: ????? ????????????? : <BlogSky:Weblog Counter /> ??? the Persian part of above code mean 'Number of visitors' and 'Persons' (from left to right). but digits are represented in latin (0123...). Is it possible to write something like a function in html? i want it to be a global one for using in weblogs. Note: I don't know anything about web programming languages. I'm not sure about language of above code. (html?)

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  • what is the right 'rails' way to add a link_to a new custom method

    - by jpwynn
    We're adding a new method 'delete_stuff' to the WidgetsController of a scaffolded app. in routes we added match 'widget/delete_stuff/:id' = 'widgets#delete_stuff' I CAN manually create html (GET) links like <a href="/widget/delete_stuff/<% widget.id %>">My Custom Delete Stuff</a> But that's bad on so many levels (uses GET instead of DELETE, doesn't permit a CONFIRM dialog, isnt DRY, etc) Problem is I can't figure out how to use the url helpers for a custom method... trying to do something like this: <% link_to 'DeleteStuff', @widget, :confirm => 'Are you sure?', :method => :delete %> But that just gets ignored when the html is rendered. I'm clearly missing something fundamental on how to use link_to, any help will be appreciated! Cheers, JP

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  • Using C# to iterate form fields with same name

    - by itsatrp
    I have a section of a form that I need to handle differently from the rest of form results. In the section that needs special handling I need to iterate over 3 form fields that have the same name. They have to have the same name, I can't change it. The section of the form I am referring to looks something like this: <td><input name="Color" size="20" value="" type="text"></td> Using C# I try something like this: I try to handle it like this: int i; for (i = 1; i <= Request.Form["Color"][i]; i++) { colorName.Text += Request.Form["Color"]; } Which leads to the following exception: System.NullReferenceException: Object reference not set to an instance of an object. How should I be handling form fields with the same name?

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  • Force Response to Download File(s) to Desktop with Ruby?

    - by viatropos
    I was thinking about making a little crop/resize batch processor online, and wanted to know if there was a way for me to do the following: upload image and specify dimensions click "process" and remote app resizes image image downloads automatically locally to wherever it was I uploaded it (say from my desktop), but with a new name (based on the time for example). This would make it so I could host a free image processor that never stored any data other than tempfiles. Is that possible? Something like Rails' send_file method, but I'm using Sinatra and am looking for something in pure ruby. What's the basic concept behind this? What if I wanted to do this for multiple files? Åssuming I can get multiple files uploaded no problem, how can I download all of them automatically?

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  • How to call an xslt transform into an xsl stylesheet

    - by Mycol
    I have written an xslt that reads some xml file names and does some operations on them. I use a for-each to work them one-by-one. I have each path inside a parameter $path. But now I would like to output the result of applying an external stylesheet to those files. I would write something like <div> <something like xsl-transform($extern-xslt,$path)> </div> to have the result tree of the transformation inside the main html output. It is possible?

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  • How to write gSOAP server using VC++ (VS2008)?

    - by Falcon
    Hi, I have downloaded gSOAP2.8 from sourceforge. I want to use it for writting a gsoap based server. I need to be able to invoke my C++ code from PHP UI. E.g. My php page would show something like: $res = a + b = ? [Submit] When submit button is clicked I want these parameters to be passed to my c++ function lets say compute_sum() ... and this function should be invoked with these parameters, and the results given back to my php page. I want to write this gsoap based c++ server. Can someone please help me with getting started with it? I need to know: 1] What kind of c++ code it should it be? (Windows console app, or a windows service) 2] How do I launch this server? (Would it need to be a webservice, hosted over something like apache?) Please advise and guide. Regards, Falcon

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  • how to display using asp.net mvc

    - by kumar
    I have a partial view called StudentInfo.ascx. In it I have something like this: <fieldset> <legend>Students Information</legend> <div> <label>First Name:</label> <label>Last Name:</label> </div> </fieldset> I have another partial view called Detail.ascx which will need to display this StudentInfo.ascx. I did something like this: <%= Html.RenderAction("StudentInfo"); %> Is that right?

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  • High level programming logic, design, pattern

    - by Muhammad Shahzad
    I have been doing programming from last 7 years, getting better and better, but still i think that am lacking something. I have been doing work in JOOMLA, MAGENTO, WP, Custom PHP, Opencart, laravel, codeignitor. Sometimes i need to design logic for a huge database application, in the applications we need nesting loops and queries, although i follow OOPS standards, ORM etc, still i feel i need more robust coding designs. I need to know how can i improve these things, so that code remain neat, efficient and faster. Also how big webapps like facebook twitter tests there code speed? How high level programmers choose design patterns. If you can help me find something useful with examples?

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  • 'is instanceof' Interface bad design

    - by peterRit
    Say I have a class A class A { Z source; } Now, the context tells me that 'Z' can be an instance of different classes (say, B and C) which doesn't share any common class in their inheritance tree. I guess the naive approach is to make 'Z' an Interface class, and make classes B and C implement it. But something still doesn't convince me because every time an instance of class A is used, I need to know the type of 'source'. So all finishes in multiple 'ifs' making 'is instanceof' which doesn't sound quite nice. Maybe in the future some other class implements Z, and having hardcoded 'ifs' of this type definitely could break something. The escence of the problem is that I cannot resolve the issue by adding functions to Z, because the work done in each instance type of Z is different. I hope someone can give me and advice, maybe about some useful design pattern. Thanks

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  • Implementing a "flag as spam/offensive" system

    - by UltraVi01
    I am looking for a community moderated way of managing/eliminating spam and offensive content. Functionality similar to StackOverflow and many other sites seems like a good way to go. Although I'm sure this could greatly vary based on specific needs, I am curious about the backend mechanism/algorithm --that is, has anyone had success using something like "3 strikes and you're out" -- the flagged post is automatically closed/deleted after 3 reports by users with the required credentials. Would something like this likely be effective or would it require a more complex solution to ensure honesty and effectiveness. Any thoughts / experiences would be great

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  • d3 tree - parents having same children

    - by Larry Anderson
    I've been transitioning my code from JIT to D3, and working with the tree layout. I've replicated http://mbostock.github.com/d3/talk/20111018/tree.html with my tree data, but I wanted to do a little more. In my case I will need to create child nodes that merge back to form a parent at a lower level, which I realize is more of a directed graph structure, but would like the tree to accomodate (i.e. notice that common id's between child nodes should merge). So basically a tree that divides like normal on the way from parents to children, but then also has the ability to bring those children nodes together to be parents (sort of an incestual relationship or something :)). Asks something similar - How to layout a non-tree hierarchy with D3 It sounds like I might be able to use hierarchical edge bundling in conjunction with the tree hierarchy layout, but I haven't seen that done. I might be a little off with that though.

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  • How to create a fully qualified hyperlink to a resource dynamically?

    - by Slauma
    In ASP.NET I'd like to create a link which points to a specific Uri and send this link in an email to a user, for instance something like http://www.BlaBla.com/CustomerPortal/Order/9876. I can create the second part of the Uri /CustomerPortal/Order/9876 dynamically in code-behind. My question is: How can I create the base Uri http://www.BlaBla.com without hardcoding it in my application? Basically I want to have something like: http://localhost:1234/CustomerPortal/Order/9876 (on my development machine) http://testserver/CustomerPortal/Order/9876 (on an internal test server) http://www.BlaBla.com/CustomerPortal/Order/9876 (on the production server) So is there a way to ask the server where the application is running: "Please tell me the base Uri of the application" ? Or any other way? Thank you in advance!

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  • Add view overlay to iPhone app

    - by Rob Lourens
    I'm trying to do something like this: - (void)sectionChanged:(id)sender { [self.view addSubview:loadingView]; // Something slow [loadingView removeFromSuperview]; } where loadingView is a semi-transparent view with a UIActivityIndicatorView. However, it seems like added subview changes don't take effect until the end of this method, so the view is removed before it becomes visible. If I remove the removeFromSuperview statement, the view shows up properly after the slow processing is done and is never removed. Is there any way to get around this?

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  • Real pagination vs Next and Previous buttons

    - by Pablo
    By real pagination i mean something like this when in page 3: <<Previous 1 | 2 | {3} | 4 | 5 |...| 15 | Next>> By Next and Previous buttons i mean something like this when in page 3: <<previous Next>> Performance wise im sure the Previous and Next Buttons are better since unlike the real pagination it doesn't require over-querying the database. By over-querying the database i mean getting more information from the database than what you will need to display on the page. My theory is that the Previous and Next Buttons can drastically increase a site performance as it only requires the exact information you will need to display on a page, please correct me if im wrong on this. so, do users really have preference when it comes to this two options? is it just a Developer preference and its convenience? Which one do you prefer? why? *Note: Previous and Next Buttons are usually labeled Newer and older.

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