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Advice moving from Eclipse to xCode

- by Gloin the Dark

To xCode xPerts: I have been doing Java in Eclipse for about 9 years now and I have really gotten used to the power of the refactoring tools. There are a few operations I do all the time. I am looking for equivalents in xCode since it has better support for objective-c than eclipse. (I'm not at my Mac as I write this. So some of this is from memory. I am still very new to xCode.) 1 "rename". It seems that the xCode equivalent for variables is "edit all in scope". Does this work for files/classes/methods too? 2 "extract local variable" select an expression it creates a local var initialized to that expression. It even creates a usable name for the variable. 3 "extract method" select some code and it will create a method with that code and appropriate parameters/return value. 4 "inline" (variable or method) opposite of extract, inlines all or just the selected occurrence of the selected var or method. 5 "find next" occurrence of selected text. In eclipse I can select some text and hit ctrl-k to go to the next occurrence of that in the file. likewise shift-ctrl-k finds backwards. IIRC the xCode "find next" ignores the selection and only uses what is in the find box. 6 "change method signature" This would be very useful with ocjective-c's named parameter messaging syntax. This is great for adding parameters to a method. 7 "pull-up/push-down" for moving methods up or down the class hierarchy. 8 "move" for moving elements around to other classes etc. Those are the ones that I use all of the time. I have estimated that these tools cut my coding time in half. Are any of these supported in xCode? Thanks in advance for any advice.

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vbCrLf in Multiline TextBox shows up only when .Trim() is called

- by Brandon Montgomery

I have an ASP TextBox with TextMode set to MultiLine. I'm having problems with preserving the vbCrLf characters when a user tries to put line breaks into the text. When a button on the page is pressed, I'm taking the text from the control, trimming it using String.Trim, and assigning that value to a String property on an object (which, in turn assigns it to a private internal String variable on the object). The object then takes the value from the private internal variable and throws it into the database using a stored procedure call (the SP parameter it is put into is an nvarchar(4000)). ASPX Page: <asp:UpdatePanel ID="UpdatePanel2" runat="server" RenderMode="Inline" UpdateMode="Conditional" ChildrenAsTriggers="true"> <ContentTemplate>  <asp:TextBox TextMode="MultiLine" runat="server" ID="txtComments" Width="100%" Height="60px" CssClass="TDTextArea" Style="border: 0px;" MaxLength="2000" />  </ContentTemplate> </asp:UpdatePanel> code behind: ProjectRequest.StatusComments = txtComments.Text.Trim object property: Protected mStatusComments As String = String.Empty Property StatusComments() As String Get Return mStatusComments.Trim End Get Set(ByVal Value As String) mStatusComments = Value End Set End Property stored proc call: Common.RunSP(mDBConnStr, "ProjectStatusUpdate", _ Common.MP("@UID", SqlDbType.NVarChar, 40, mUID), _ Common.MP("@ProjID", SqlDbType.VarChar, 40, mID), _ Common.MP("@StatusID", SqlDbType.Int, 8, mStatusID), _ Common.MP("@Comments", SqlDbType.NVarChar, 4000, mStatusComments), _ Common.MP("@PCTComp", SqlDbType.Int, 4, 0), _ Common.MP("@Type", Common.TDSqlDbType.TinyInt, 1, EntryType)) Here's the strangest part. When I debug the code, if I type "test test" (without the quotes) into the comments text box, then click the save button and use the immediate window to view the variable values as I step through, here is what I get: ?txtComments.Text "test test" ?txtComments.Text.Trim "test test" ?txtComments.Text(4) " "c ?txtComments.Text.Trim()(4) " "c Anyone have a clue as to what's going on here?

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jQuery autocomplete: taking JSON input and setting multiple fields from single field

- by Sly

I am trying to get the jQuery autocomplete plugin to take a local JSON variable as input. Once the user has selected one option from the autocomplete list, I want the adjacent address fields to be autopopulated. Here's the JSON variable that declared as a global variable in the of the HTML file: var JSON_address={"1":{"origin":{"nametag":"Home","street":"Easy St","city":"Emerald City","state":"CA","zip":"9xxxx"},"destination":{"nametag":"Work","street":"Factory St","city":"San Francisco","state":"CA","zip":"94104"}},"2":{"origin":{"nametag":"Work","street":"Umpa Loompa St","city":"San Francisco","state":"CA","zip":"94104"},"destination":{"nametag":"Home","street":"Easy St","city":"Emerald City ","state":"CA","zip":"9xxxx"}}}</script> I want the first field to display a list of "origin" nametags: "Home", "Work". Then when "Home" is selected, adjacent fields are automatically populated with Street: Easy St, City: Emerald City, etc. Here's the code I have for the autocomplete: $(document).ready(function(){ $("#origin_nametag_id").autocomplete(JSON_address, { autoFill:true, minChars:0, dataType: 'json', parse: function(data) { var rows = new Array(); for (var i=0; i<=data.length; i++) { rows[rows.length] = { data:data[i], value:data[i].origin.nametag, result:data[i].origin.nametag }; } return rows; } }).change(function(){ $("#street_address_id").autocomplete({ dataType: 'json', parse: function(data) { var rows = new Array(); for (var i=0; i<=data.length; i++) { rows[rows.length] = { data:data[i], value:data[i].origin.street, result:data[i].origin.street }; } return rows; } }); }); }); So this question really has two subparts: 1) How do you get autocomplete to process the multi-dimensional JSON object? (When the field is clicked and text entered, nothing happens - no list) 2) How do you get the other fields (street, city, etc) to populate based upon the origin nametag sub-array? Thanks in advance!

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emacs: Can I set compilation-error-regexp-alist in a mode hook fn?

- by Cheeso

I am trying to set the compilation-error-regexp-alist in a function that I add as a mode hook. (defun cheeso-javascript-mode-fn () (turn-on-font-lock) ...bunch of other stuff ;; for JSLINT (make-local-variable 'compilation-error-regexp-alist) (setq compilation-error-regexp-alist '( ("^[ \t]*\\([A-Za-z.0-9_: \\-]+\\)(\\([0-9]+\\)[,]\\( *[0-9]+\\))\\( Microsoft JScript runtime error\\| JSLINT\\): \\(.+\\)$" 1 2 3) )) ;;(make-local-variable 'compile-command) (setq compile-command (let ((file (file-name-nondirectory buffer-file-name))) (concat "%windir%\\system32\\cscript.exe \\cheeso\\bin\\jslint.js " file))) ) (add-hook 'javascript-mode-hook 'cheeso-javascript-mode-fn) The mode hook runs. The various things I Set in the mode hook work. The compile-command gets set. But for some reason, the compilation-error-regexp-alist value doesn't take effect. If I later do a M-x describe-variable on compilation-error-regexp-alist, it shows me the value I think it should have. But .. the errors in the compilation buffer don't get highlighted, and M-x next-error does not work. If I add the error regexp value to the compilation-error-regexp-alist via setq-default, like this: (setq-default compilation-error-regexp-alist '( ... jslint regexp here ... ... many other regexp's here... )) ...then it works. The errors in the compilation buffer get properly highlighted and M-x next-error functions as expected.

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Altering URLs and mapping - path_prefix? - Ruby on Rails...

- by bgadoci

Ok, so I am working on a blog application of sorts. Thus far, it allows for a user to sign up for their own account, create posts, tags, comments, etc. I have just implemented the ability to use www.myapp.com/brandon to set @user to find by username and therefore correctly display the users information at each url. So when you go to www.myapp.com/brandon you see all Brandon's posts, tags, and comments associated with those posts, etc. Works great. I implementing this URL mapping through the routes.rb file by adding the following: map.username_link '/:username', :controller => 'posts', :action => 'index' And then just setting the @user variable in the PostController and corresponding views to find_by_username. Now the issue is this. Once at www.myapp.com/brandon when you click on a post title, it sends to myapp.com/posts/id without the username in the URL which blows up my view because nothing is being set for the @user variable. How do I tell Rails to create the link reading www.myapp.com/brandon/posts/id vs www.myapp.com/posts/id and then map that action? I am assuming this will involve some code in the view, and then adding another line in the routes.rb file, map.subdomain_link '/:username/posts/:id', :controller => 'posts', :action => 'show' and adding the @user variable to the PostController#show action, but not totally sure if this is even the right approach. UPDATE: I have been reading about :path_prefix and seems like it might be what I am looking for. I have tried to implement simply by adding map.resources :posts, :path_prefix => '/:user_username/:post_id' to the routes.rb file but not working (even after server restart). I am sure this is not correct but wanted to let you know what I have tried.

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What's with the love of dynamic Languages

- by Kibbee

It seems that everybody is jumping on the dynamic, non-compiled bandwagon lately. I've mostly only worked in compiled, static typed languages (C, Java, .Net). The experience I have with dynamic languages is stuff like ASP (Vb Script), JavaScript, and PHP. Using these technologies has left a bad taste in my mouth when thinking about dynamic languages. Things that usually would have been caught by the compiler such as misspelled variable names and assigning an value of the wrong type to a variable don't occur until runtime. And even then, you may not notice an error, as it just creates a new variable, and assigns some default value. I've also never seen intellisense work well in a dynamic language, since, well, variables don't have any explicit type. What I want to know is, what people find so appealing about dynamic languages? What are the main advantages in terms of things that dynamic languages allow you to do that can't be done, or are difficult to do in compiled languages. It seems to me that we decided a long time ago, that things like uncompiled asp pages throwing runtime exceptions was a bad idea. Why is there is a resurgence of this type of code? And why does it seem to me at least, that Ruby on Rails doesn't really look like anything you couldn't have done with ASP 10 years ago?

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Django model operating on a queryset

- by jmoz

I'm new to Django and somewhat to Python as well. I'm trying to find the idiomatic way to loop over a queryset and set a variable on each model. Basically my model depends on a value from an api, and a model method must multiply one of it's attribs by this api value to get an up-to-date correct value. At the moment I am doing it in the view and it works, but I'm not sure it's the correct way to achieve what I want. I have to replicate this looping elsewhere. Is there a way I can encapsulate the looping logic into a queryset method so it can be used in multiple places? I have this atm (I am using django-rest-framework): class FooViewSet(viewsets.ModelViewSet): model = Foo serializer_class = FooSerializer bar = # some call to an api def get_queryset(self): # Dynamically set the bar variable on each instance! foos = Foo.objects.filter(baz__pk=1).order_by('date') for item in foos: item.needs_bar = self.bar return items I would think something like so would be better: def get_queryset(self): bar = # some call to an api # Dynamically set the bar variable on each instance! return Foo.objects.filter(baz__pk=1).order_by('date').set_bar(bar) I'm thinking the api hit should be in the controller and then injected to instances of the model, but I'm not sure how you do this. I've been looking around querysets and managers but still can't figure it out nor decided if it's the best method to achieve what I want. Can anyone suggest the correct way to model this with django? Thanks.

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function's return address is different from its supposed value, buffer overflow,

- by ultrajohn

Good day everyone! I’m trying to understand how buffer overflow works. I’m doing this for my project in a computer security course I’m taking. Right now, I’m in the process of determining the address of the function’s return address which I’m supposed to change to perform a buffer overflow attack. I’ve written a simple program based from an example I’ve read in the internet. What this program does is it creates an integer pointer that will be made to point to the address of the function return address in the stack. To do this, (granted I understand how a function/program variables get organized in the stack), I add 8 to the buffer variable’ address and set it as the value of ret. I’m not doing anything here that would change the address contained in the location of func’s return address. here's the program: Output of the program when gets excecuted: As you can see, I’m printing the address of the variables buffer and ret. I’ve added an additional statement printing the value of the ret variable (supposed location of func return address, so this should print the address of the next instruction which will get executed after func returns from execution). Here is the dump which shows the supposed address of the instruction to be executed after func returns. (Underlined in green) As you can see, that value is way different from the value printed contained in the variable ret. My question is, why are they different? (of course in the assumption that what I’ve done are all right). Else, what have I done wrong? Is my understanding of the program’s runtime stack wrong? Please, help me understand this. My project is due nextweek and I’ve barely touched it yet. I’m sorry if I’m being demanding, I badly need your help.

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Flash (AS3) can't read response ...

- by Quandary

Question: I call an asp.net handler (ashx) like this from Flash, and onLoadSuccessful, I get the ashx response back. The problem now is whatever I do in onLoadSuccessful to get the responseStatus variable never gets me the variable (just an error message: property responseStatus for string not found), but the output of: trace("Response: " + evt.target.data); is Response: &responseStatus=ASP.NET+Fehler%3a+Die+Datei+%22C%3a%5cinetpub%5cwwwroot%5cRaumplaner_New%5cRaumplaner_New%5cabcdef.xml%22+konnte+nicht+gefunden+werden.& It used to work in ActionScript2... Any hints as to what I do wrong ? I mean the request gets sent, and the reponse received, but no matter how I try to do it, I can't access the responseStatus variable... var scriptRequest:URLRequest = new URLRequest(strURL); var scriptLoader:URLLoader = new URLLoader(); var scriptVars:URLVariables = new URLVariables(); scriptLoader.addEventListener(Event.COMPLETE, onLoadSuccessful); scriptLoader.addEventListener(IOErrorEvent.IO_ERROR, onLoadError); scriptLoader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSecurityError); scriptVars.ScaleString = nScale; scriptVars.ModifyFile = "abcdef.xml"; scriptRequest.method = URLRequestMethod.POST; scriptRequest.data = scriptVars; scriptLoader.load(scriptRequest); function onLoadSuccessful(evt:Event):void { trace("Success."); //ExternalInterface.call("alert", "Die neue Skalierung wurde erfolgreich gespeichert."); //getURL("javascript:alert(\""+"Die neue Skalierung wurde erfolgreich gespeichert.\\nALLE Instanzen des Browsers schliessen und neu starten, damit die Änderung in Kraft tritt."+"\");"); trace("Response: " + evt.target.data); trace("ResponseStatus: " + evt.target.data.responseStatus); var loader:URLLoader = URLLoader(evt.target); trace("responseStatus: " + loader.data.responseStatus); }

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perl issuing os command with defined variables

- by Vinnie Biros

I am adding functionality into my scripts so that they can use kerberos authentication to run automatically and use secure protocols when executing. I have my functionality working for shell scripts that do exactly what i want, however i am having issues porting it to perl to work within my perl scripts as i am new to perl. Here is my working shell code and trying to get the same functionality in perl: #!/bin/sh ticketFileName=`basename $0-$$` #set filename variable to name of script plus the PID krb5CacheLocation=/tmp/$ticketFileName #set ticket cache location to /tmp + script name /usr/share/centrifydc/kerberos/bin/kinit -c $krb5CacheLocation -kt /root/.ssh/someaccount.keytab someaccount #get TGT and specifiy ticket cache location on kinit export KRB5CCNAME=$krb5CacheLocation #set the KRB5CCNAME variable to tell ssh where to look What i have attempted in perl: #!/usr/bin/perl my $ticketFileName = `basename $0-$$`; my $krb5CacheLocation = '/tmp/'.$ticketFileName; `export KRB5CCNAME=$krb5CacheLocation`; `/usr/share/centrifydc/kerberos/bin/kinit -c $krb5CacheLocation -kt /root/.ssh/unixmap0000.keytab unixmap0000`; Seems it is not liking the passed variable that i am referencing in the OS command. Anyone have any ideas or suggestions?

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Write a compiler for a language that looks ahead and multiple files?

- by acidzombie24

In my language I can use a class variable in my method when the definition appears below the method. It can also call methods below my method and etc. There are no 'headers'. Take this C# example. class A { public void callMethods() { print(); B b; b.notYetSeen(); public void print() { Console.Write("v = {0}", v); } int v=9; } class B { public void notYetSeen() { Console.Write("notYetSeen()\n"); } } How should I compile that? what i was thinking is: pass1: convert everything to an AST pass2: go through all classes and build a list of define classes/variable/etc pass3: go through code and check if there's any errors such as undefined variable, wrong use etc and create my output But it seems like for this to work I have to do pass 1 and 2 for ALL files before doing pass3. Also it feels like a lot of work to do until I find a syntax error (other than the obvious that can be done at parse time such as forgetting to close a brace or writing 0xLETTERS instead of a hex value). My gut says there is some other way. Note: I am using bison/flex to generate my compiler.

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Help to understand the issue with protected method

- by zeroed

I'm reading Sybex Complete Java 2 Certification Study Guide April 2005 (ISBN0782144195). This book is for java developers who wants to pass java certification. After a chapter about access modifiers (along with other modifiers) I found the following question (#17): True or false: If class Y extends class X, the two classes are in different packages, and class X has a protected method called abby(), then any instance of Y may call the abby() method of any other instance of Y. This question confused me a little. As far as I know you can call protected method on any variable of the same class (or subclasses). You cannot call it on variables, that higher in the hierarchy than you (e.g. interfaces that you implement). For example, you cannot clone any object just because you inherit it. But the questions says nothing about variable type, only about instance type. I was confused a little and answered "true". The answer in the book is False. An object that inherits a protected method from a superclass in a different package may call that method on itself but not on other instances of the same class. There is nothing here about variable type, only about instance type. This is very strange, I do not understand it. Can anybody explain what is going on here?

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Thread implemented as a Singleton

- by rocknroll

Hi all, I have a commercial application made with C,C++/Qt on Linux platform. The app collects data from different sensors and displays them on GUI. Each of the protocol for interfacing with sensors is implemented using singleton pattern and threads from Qt QThreads class. All the protocols except one work fine. Each protocol's run function for thread has following structure: void <ProtocolClassName>::run() { while(!mStop) //check whether screen is closed or not { mutex.lock() while(!waitcondition.wait(&mutex,5)) { if(mStop) return; } //Code for receiving and processing incoming data mutex.unlock(); } //end while } Hierarchy of GUI. 1.Login screen. 2. Screen of action. When a user logs in from login screen, we enter the action screen where all data is displayed and all the thread's for different sensors start. They wait on mStop variable in idle time and when data arrives they jump to receiving and processing data. Incoming data for the problem protocol is 117 bytes. In the main GUI threads there are timers which when timeout, grab the running instance of protocol using <ProtocolName>::instance() function Check the update variable of singleton class if its true and display the data. When the data display is done they reset the update variable in singleton class to false. The problematic protocol has the update time of 1 sec, which is also the frame rate of protocol. When I comment out the display function it runs fine. But when display is activated the application hangs consistently after 6-7 hours. I have asked this question on many forums but haven't received any worthwhile suggestions. I Hope that here I will get some help. Also, I have read a lot of literature on Singleton, multithreading, and found that people always discourage the use of singletons especially in C++. But in my application I can think of no other design for implementation. Thanks in advance A Hapless programmer

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Dynamic Google Maps API InfoWindow HTML Content

- by Peter Hanneman

I am working in Flash Builder 4 with Google Map's ActionScript API. I have created a map, loaded some custom markers onto it and added some MouseEvent listeners to each marker. The trouble comes when I load an InfoWindow panel. I want to dynamically set the htmlContent based off of information stored in a database. The trouble is that this information can change every couple of seconds and each marker has a unique data set so I can not statically set it at the time I actually create the markers. I have a method that will every minute or so load all of the records from my database into an Object variable. Everything I need to display in the htmlContent is contained in this object under a unique identifier. The basic crux of the problem is that there is no way for me to uniquely identify an info window, so I can not determine what information to pull into the panel. marker.addEventListener(MapMouseEvent.ROLL_OVER, function(e:MapMouseEvent):void { showInfoWindow(e.latLng) }, false, 0, false); That is my mouse event listener. The function I call, "showInfowindow" looks like this: private function showInfoWindow(latlng:LatLng):void { var options:InfoWindowOptions = new InfoWindowOptions({title: appData[*I NEED A UNIQUE ID HERE!!!*].type + " Summary", contentHTML: appData[*I NEED A UNIQUE ID HERE!!!*].info}); this.map.openInfoWindow(latlng, options); } I thought I was onto something by being able to pass a variable in my event listener declaration, but it simply hates having a dynamic variable passed through, it only returns the last value use. Example: marker.addEventListener(MapMouseEvent.ROLL_OVER, function(e:MapMouseEvent):void { showInfoWindow(e.latLng, record.unit_id) }, false, 0, false); That solution is painfully close to working. I iterate through a loop to create my markers when I try the above solution and roll over a marker I get information, but every marker's information reflects whatever information the last marker created had. I apologize for the long explaination but I just wanted to make my question as clear as possible. Does anyone have any ideas about how to patch up my almost-there-solution that I posted at the bottom or any from the ground up solutions? Thanks in advance, Peter Hanneman

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CSS Tables & min-width container?

- by neezer

<div id="wrapper"> <div id="header">...</div> <div id="main"> <div id="content">...</div> <div id="sidebar">...</div> </div> </div> #wrapper { min-width: 900px; } #main { display: table-row; } #content { display: table-cell; } #sidebar { display: table-cell; width: 250px; } The problem is that the sidebar isn't always at the right-most part of the page (depending on the width of #content). As #content's width is variable (depending on the width of the window), how to I make it so that the sidebar is always at the right-most part of its parent? Ex. Here's what I have now: <--- variable window width ----> --------------------------------- | (header) | --------------------------------- [content] | [sidebar] | | | | | | | | | | | | | And here's what I want: <--- variable window width ----> --------------------------------- | (header) | --------------------------------- [content] | [sidebar] | | | | | | | | | | | | | Please let me know if you need anymore information to help me with this issue. Thanks! PS - I know I can accomplish this easily with floats. I'm looking for a solution that uses CSS tables.

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External XML and AS3

- by VideoDnd

I want to pass external XML a variable. How do I do this? WHAT I'M AFTER - update my variable with COUNT XML WHAT I'M NOT GETTING - The integer to String values - How to pass XML to a variable link http://videodnd.weebly.com/ time.xml <?xml version="1.0" encoding="utf-8"?> <SESSION> <COUNT TITLE="starting position">-77777</COUNT> </SESSION> xml.fla //VARIABLES /*CHANGE TO COUNT MyString or count, I don't know if it was necessary to go from int to String */ var myString:String = ""; var count:int = int(myString); trace(count); //LOAD XML var myXML:XML; var myLoader:URLLoader = new URLLoader(); myLoader.load(new URLRequest("time.xml")); myLoader.addEventListener(Event.COMPLETE, processXML); //PARSE XML function processXML(e:Event):void { myXML = new XML(e.target.data); trace(myXML.COUNT.*); trace(myXML); //TEXT var text:TextField = new TextField(); text.text = myXML.COUNT.*; addChild(text); } output window 'traces to the output window correctly' //zero should read -77777 if tracing correctly 0 -77777 <SESSION> <COUNT TITLE="starting position">-77777</COUNT> </SESSION> errors coercion errors and null references with anything I attempt.

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Signals and Variables in VHDL - Problem

- by Morano88

I have a signal and this signal is a bitvector. The length of the bitvector depends on an input n, it is not fixed. In order to find the length, I have to do some computations. Can I define a signal after defining the variables ? It is ggiving me errors when I do that. It is working fine If I keep the signal before the variables .. but I don't want that .. the length of Z depends on the computations of the variables. What is the solution ? library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity BSD_Full_Comp is Generic (n:integer:=8); Port(X, Y : inout std_logic_vector(n-1 downto 0); FZ : out std_logic_vector(1 downto 0)); end BSD_Full_Comp; architecture struct of BSD_Full_Comp is Component BSD_BitComparator Port ( Ai_1 : inout STD_LOGIC; Ai_0 : inout STD_LOGIC; Bi_1 : inout STD_LOGIC; Bi_0 : inout STD_LOGIC; S1 : out STD_LOGIC; S0 : out STD_LOGIC ); END Component; Signal Z : std_logic_vector(2*n-3 downto 0); begin ass : process Variable length : integer := n; Variable pow : integer :=0 ; Variable ZS : integer :=0; begin while length /= 0 loop length := length/2; pow := pow+1; end loop; length := 2 ** pow; ZS := length - n; wait; end process; end struct;

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How do php apps identify a user after the session has timed out?

- by Bill Zimmerman

I am trying to understand how PHP apps check to see if a user is logged in. I am specifically looking at mediawiki's code to try to help me understand, but these cases should be fairly common in all php apps. From what I gather, the main cases are: A user just logged in or was created, every time they visit the page PHP knows its them by checking data common to the $_SESSION variable and the cookie. A user had the 'remember me' option checked on the login page a long time ago. They have a cookie on there computer with a tokenID, which is checked with a token on the server to authenticate them. In this case, there is no session variable, because the time between accesses could be weeks. My question is, what happens when a user is logged in, but the PHP session times out and he wants to access a page? I would have assumed that there is no easy way for the server to know who the person is - and that they would have to be redirected to the login page. However, mediawiki does just that. I've verified that the session files are deleted after X minutes, but when I hit refresh in mediawiki, it knows which user I am, and the 'token' variable is not included in the cookie.

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setInterval alternative

- by spyder

Hi folks, In my app I am polling the webserver for messages every second and displaying them in the frontend. I use setInterval to achieve this. However as long as the user stays on that page the client keeps polling the server with requests even if there is no data. The server does give an indication when no more messages are being generated by setting a variable. I thought of using this variable to clearInterval and stop the timer but that didn't work. What else can I use in this situation? I am using jquery and django. Here is my code: jquery: var refresh = setInterval( function () { var toLoad = '/myMonitor'+' #content'; $('#content').load(toLoad).show(); }, 1000); // refresh every 1000 milliseconds }); html: div id=content is here I can access the django variable for completion in html with each refresh. How can I set clearInterval if at all ? Note: stack overflow does not let me put is &gt &lt so html is incomplete Thanks

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Declaration of arrays before "normal" variables in c?

- by bjarkef

Hi We are currently developing an application for a msp430 MCU, and are running into some weird problems. We discovered that declaring arrays withing a scope after declaration of "normal" variables, sometimes causes what seems to be undefined behavior. Like this: foo(int a, int *b); int main(void) { int x = 2; int arr[5]; foo(x, arr); return 0; } foo sometimes is passed a pointer as the second variable, that does not point to the arr array. We verify this by single stepping through the program, and see that the value of the arr variable in the main scope is not the same as the value of the b pointer variable in the foo scope. And no, this is not really reproduceable, we have just observed this behavior once in a while. Changing the example seems to solve the problem, like this: foo(int a, int *b); int main(void) { int arr[5]; int x = 2; foo(x, arr); return 0; } Does anybody have any input or hints as to why we experience this behavior? Or similar experiences? The MSP430 programming guide specifies that code should conform to the ANSI C89 spec. and so I was wondering if it says that arrays has to be declared before non-array variables? Any input on this would be appreciated.

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[Doxygen] How to documenting global dependencies for functions?

- by Thomas Matthews

I've got some C code from a 3rd party vendor (for an embedded platform) that uses global variables (for speed & space optimizations). I'm documenting the code, converting to Doxygen format. How do I put a note in the function documentation that the function requires on global variables and functions? Doxygen has special commands for annotating parameters and return values as describe here: Doxygen Special Commands. I did not see any commands for global variables. Example C code: extern unsigned char data_buffer[]; //!< Global variable. /*! Returns the next available data byte. * \return Next data byte. */ unsigned char Get_Byte(void) { static unsigned int index = 0; return data_buffer[index++]; //!< Uses global variable. } In the above code, I would like to add Doxygen comments that the function depends on the global variable data_buffer.

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PHP and CURL under Windows 7 64 bits and Apache

- by supermogx

I'm trying to use curl with PHP on my box without any success. My Config : OS : win 7 64 bits, PHP : 5.3.1, Apache : 2.2.14 I was able to use the mysql extension, so the configuration of my php.ini seems fine. But I get and error in Apache log with curl : PHP Warning: PHP Startup: Unable to load dynamic library 'C:/php-5.3.1/ext/php_curl.dll' - The specified module could not be found.\r\n in Unknown on line 0 The file is right there, and it's loading php_mysql.dll without any problem. I tried everything : to put the dll file in apache\bin, windows\system32, put the path of the php EXT in the PATH environment variable. to put some lib (libeay.dll and sssomething.dll) in windows 32 Well, I think this might have something to do with my Windows being 64 bits or with the version of PHP.. maybe. I don't know anymore :( Any idea? Update I'm not using Wamp because I like to know what I do to my system, and ultimately choose the version that I want of apache, php and MySql. My Solution I added the path of PHP in my PATH environement variable and it worked. I'll try to find out what was the DLL needed. Update : Well it looks like it was libeay32.dll and sslleay32.dll had to be in the PATH environment variable. I added to the bin subdirectory of Apache and it worked.

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Trying to use an Xslt for an xml in asp.net

- by Josemalive

Hello, i have the following xslt sheet: <?xml version="1.0" encoding="UTF-8" ?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:variable name="nhits" select="Answer[@nhits]"></xsl:variable> <xsl:output method="html" indent="yes"/> <xsl:template match="/"> <div> <xsl:call-template name="resultsnumbertemplate"/> </div> </xsl:template> <xsl:template name="resultsnumbertemplate"> <xsl:value-of select="$nhits"/> matches found </xsl:template> </xsl:stylesheet> And this is the xml that im trying to mix with the previous xslt: <Answer xmlns="exa:com.exalead.search.v10" context="n%3Dsl-ocu%26q%3Dlavadoras" last="9" estimated="false" nmatches="219" nslices="0" nhits="219" start="0"> <time> <Time interrupted="false" overall="32348" parse="0" spell="0" exec="1241" synthesis="15302" cats="14061" kwds="14061"> <sliceTimes>15272 </sliceTimes> </Time> </time> </Answer> Im using a xslcompiledtransform and that's working fine: XslCompiledTransform transformer = new XslCompiledTransform(); transformer.Load(HttpContext.Current.Server.MapPath("xslt\\" + requestvariables["xslsheet"].ToString())); transformer.Transform(xmlreader, null, writer); My problems comes when im trying to put into a variable the "nhits" attribute value placed on the Answer element, but i'm not rendering anything using my xslt sheet. Do you know what could be the cause? Could be the xmlns attribute in my xml file? Thanks in advance. Best Regards. Jose

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Maintaining state and data context between requests in ASP.NET + EF4

- by Nick

I have a EF4/ASP.NET web application that is structured to use POCOs and generic repositories, based essentially on this excellent article. The application is relatively sophisticated with one page that involves selection and linking of multiple entities to build up a complex user profile. This requires access to multiple entity types (20 or so) and associated repositories across multiple posts. When a repository is first accessed it uses the existing data context if exists, else it creates a new context. The problem is that if the lifetime of the context is only per-request (as suggested in the article) then you have to deal with multiple contexts and the complexity around detaching and attaching entities from contexts. My solution is to share the context between posts by creating a single View Model that includes all required repositories (initialised to share the same context) plus any associated data and store this model in a Session variable, retrieving from Session on subsequent page requests. Therefore maintaining the same context across all posts until the profile is saved. This works fine BUT I am concerned that I don't actually know exactly what is stored in the model session variable or more importantly the size of the Session variable. So two questions I suppose: firstly should I look for a better solution to handle the shared context across posts issue (any suggestions welcome)? And secondly what is actually stored in the Session when it includes a repository plus context? Any help appreciated!

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C sharp code cleanup : resharper

- by Ankit Rathod

Hello, I just used Resharper in one application and it made me feel as if i don't know how to code at all in C# :(. On every line it gave me it's suggestions :- Few of Resharper's favorite suggestions are :- 1) SomObject o = new SomeObject(); Resharper will convert to : var o = new SomeObject() 2) this.Loaded += new RoutedEventHandler(MainPage_Loaded); to this.Loaded += MainPage_Loaded; 3) convert my variables and putting _ in front of all instance variables. 4) Removing class parent's name. I tested this on Silverlight. public partial class MainPage : UserControl to public partial class MainPage EDIT :- 5) replace instance variable this.variable = somevalue to variable = somevalue Are all of these really necessary? Is it really going to affect the efficiency of my program? I mean what good is it going to do by replacing my class names with var keyword. After all var is also replaced with class name at compile time. Is it doing because it has been programmed to do or do these things really affect in some or another way? Thanks in advance :)

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