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  • Why am I needing to click twice on a WPF listbox item in order to fire a command?

    - by Donal
    Hi, I'm trying to make a standard WPF listbox be dynamically filled, and for each item in the list box to launch a command when clicked. Currently I have a working listbox, which can be filled and each item will fire the correct command, but in order to fire the command I have to click the list item twice. i.e, Click once to select the item, then click on the actual text to fire the command. As the list is dynamically created, I had to create a data template for the list items: <ListBox.ItemTemplate> <DataTemplate> <TextBlock Margin="4,2,4,2"> <Hyperlink TextDecorations="None" Command="MyCommands:CommandsRegistry.OpenPanel"> <TextBlock Text="{Binding}" Margin="4,2,4,2"/> </Hyperlink> </TextBlock> </DataTemplate> </ListBox.ItemTemplate> Basically, how do I remove the need to click twice? I have tried to use event triggers to fire the click event on the hyperlink element when the list box item is selected, but I can't get it to work. Or, is there a better approach to dynamically fill a listbox and attach commands to each list item? Thanks

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  • (iphone) am I creating a leak when creating a new image from an image?

    - by Eugene
    Hi, I have following code as UIImage+Scale.h category. -(UIImage*)scaleToSize:(CGSize)size { UIGraphicsBeginImageContext(size); [self drawInRect:CGRectMake(0, 0, size.width, size.height)]; // is this scaledImage auto-released? UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return scaledImage; } I use image obtained as above and use it as following. UIImage* image = [[UIImage alloc] initWithData: myData]; image = [image scaleToSize: size]; <- wouldn't this code create a leak since image(before scaling) is lost somewhere? i guess above codes work fine if image was first created with auto-release. But if image was created using 'alloc', it would create a leak in my short knowledge. How should I change scaleToSize: to guard against it? Thank you

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  • I am loading content via Ajax, but I need it to not load anything when my site loads

    - by Reden
    I'm loading content into several divs with ajax_loadContent <div class="content"><div class="container" id="contents2"><!-- Empty div for dynamic content -->Loading content. please wait...</div><script type="text/javascript">ajax_loadContent('contents2','http://www.thewebsite.com/blank.php');</script></div> Basically, I don't want to load anything until the user clicks on the links I have specified to load content into these instances, please help! Right now, I'm loading a blank file to show nothing in the div.

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  • Create an Action<T> to "set" a property, when I am provided with the LINQ Expression for the "get"

    - by Alex
    I'd like to be able to generate a compiled expression to set a property, given the lambda expression that provides the "get" method for a property. Here's what I'm looking for: public Action<int> CreateSetter<T>(Expression<Func<T, int>> getter) { // returns a compiled action using the details of the getter expression tree, or null // if the write property is not defined. } I'm still trying to understand the various types of Expression classes, so if you can point me in the right direction that would be great.

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  • Am i using too much jquery? When i'm crossing the line?

    - by Andrea
    Lately i find myself using jquery and javascript a lot, often to do the same things that i did before using css. For example, i alternate table rows color or create buttons and links hover effects using javascript/jquery. Is this acceptable? Or should i keep using css for these kind of things? So the real question is: When i'm using too much jquery? How can i understand when i'm crossing the line? Thanks.

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  • Django GenericRelation doesn't save related object's id - is this a bug or am I doing it wrong?

    - by pinkeen
    I have a model with a generic relation (call it A), when creating an instance of this object I pass an instance of another model (call it B) as the initializer of the content_object field (via kwargs of the constructor). If I don't save B before creating A then when saving A the content_object_id is saved to the db as NULL. If I save B before passing it to the constructor of A then everything's allright. It's not logical. I assumed that the ID of the related object (B) is fetched when doing A.save() and it should throw some kind of an exception if B isn't saved yet but it just fails silently. I don't like the current solution (saving B beforhand) because we don't know yet if I will be always willing to keep the object, not just scrap it, and there are performance considerations - what if I will add some another data and save it once more shortly after. class BaseNodeData(models.Model): ... extnodedata_content_type = models.ForeignKey(ContentType, null=True) extnodedata_object_id = models.PositiveIntegerField(null=True) extnodedata = generic.GenericForeignKey(ct_field='extnodedata_content_type', fk_field='extnodedata_object_id') class MarkupNodeData(models.Model): raw_content = models.TextField() Suppose we do: markup = MarkupNodeData(raw_content='...') base = BaseNodeData(..., extnodedata=markup) markup.save() base.save() # both records are inserted to the DB but base is stored with extnodedata_object_id=NULL markup = MarkupNodeData(raw_content='...') base = BaseNodeData(..., extnodedata=markup) base.save() markup.save() # no exception is thrown and everything is the same as above markup = MarkupNodeData(raw_content='...') markup.save() base = BaseNodeData(..., extnodedata=markup) base.save() # this works as expected Of course I can do it this way, but it doesn't change anything: base = BaseNodeData(...) base.extnodedata = markup My question is - is this a bug in django which I should report or maybe I'm doing something wrong. Docs on GenericRelations aren't exactly verbose.

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  • i have a arraylist where i am verifying particular object is existing or not but even it exists it always returns false

    - by Raghavender Reddy
    hi i have class called userdata which returns the Userarraylist which is of type User. when ever i try to use contains method to check particular property is existing or not it always returns false why? Actually i want the array list to be generic which should return the objects that are set in array list. String className = data.getUserData().get(0).getClass().getSimpleName(); if(className.equalsIgnoreCase("User")) { ArrayList<User> userdata=new ArrayList(); userdata = data.getUserData(); System.out.println(data.getUserData().contains(u.getUserId())); if(userdata.contains(u.getUserName())) { System.out.println(userdata.get(0).getEmailId()); } }

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  • PHP function to handle most database queries has a problem with results. I am getting the right numb

    - by asdasds
    Here is my little function. It does not handle the results correctly. I do get all the rows that I want, but all the rows of the $results array contain the exact same values. So i make 2 arrays, a temporary array to hold the values after each fetch, and another array to hold all the temporary arrays. First i take the temp array and map its keys to the column names. Then i give it to bind_result, and call fetch() and use it like I would any other result value. Could this be because I re-use the $results array? numresults is the number of values you are taking from each row. if 0, you are not getting any results back. function db_query($db, $query, $params = NULL, $numresults = 0) { if($stmt = $db -> prepare($query)) { if($params != NULL) { call_user_func_array(array($stmt, 'bind_param'), $params); } if(!$stmt -> execute()) { //echo 'exec error:',$db->error; return false; } if($numresults > 0) { $results = array(); $tmpresult = array(); $meta = $stmt->result_metadata(); while ($columnName = $meta->fetch_field()) $tmpresult[] = &$results[$columnName->name]; call_user_func_array(array($stmt, 'bind_result'), $tmpresult); $meta->close(); $results = array(); while($stmt -> fetch()) $results[] = $tmpresult; } $stmt -> close(); } else { //echo 'prepare error: ',$db->error; return false; } if($numresults == 0) return true; return $results; }

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  • new cacti installation on ubuntu 12.04 64bit not graphing any data

    - by Dani Cela
    Hey guys i just installed cacti on a ubuntu 12.04 server and am having issues with any data showing up on my graphs. If i snmpwalk the certain OID it works. I have tailing on the cacti.log file and i see it polling the values correctly but nothing ever graphs. Is there anything i can check with regards to snmp or something in cacti that may be causing this to not work? I have already checked in my php.ini and have set the timezone, someone was mentioning that may cause issues.

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  • Need help to make a decision in career switch over? [closed]

    - by Fero
    I am a Software Engineer having 4 Years of experinece in web development using PHP, Drupal, MySql, Ajax and client site technologies like javascript, jquery,html and more. I have decided two platforms to switch over my career. SAP-ABAP (Because ABAP is related to coding) SALES FORCE One and only reason is that I am not getting good pack for the technologies what I am working with. Even top level companies are not ready to pay for this technologies. (And I am not expecting more.) To be honest I am good at technical and HR interviews too. So, I started to make an analysis of highly payable platforms and I got these two. SAP and Salesforce (Probabilty of On-site opportunity is also very high on both) Here my questions are: I am totally new to the above mentioned technologies. Which will be best suit for me ? Having basic ideas of the platforms what I have decided - But I am confused to choose I am having Good Coding experiencein PHP, Drupal as well as good experience in MySql. Having very good experience in creating sites related to E-Commerce, LMS, Q&A sites, Travel Sites, Blogs, Social networking site and more. Which I can learn easily or for which I can get good documentations online Kindly understand that I am not creating a debate over here. I hope Professionals over here can Show me the correct path.... I am waiting to travel on that...

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  • Was a Big Fish in a Little Pond, Am Now a Little Fish in a Big Pond. How Do I Grow? [closed]

    - by Ziv
    I've finished high school where I was in the top three in my class, I studied a little and there too I was pretty much Big Fish in a bigger pond than high school. Now I got into my first job in a very big company, there are some incredibly talented programmers and researchers here (mostly in departments not related to mine) and for the first time I really feel like I'm incredibly average - I do not want to be average. I read technical books all the time, I try to code on my personal time but I don't feel like that's enough. What can I do to become a leading programmer again in this big company? Is there anything specifically that can be done to make myself known here? This is a very big company so in order to advance you must be very good and shine in your field.

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  • Win Server 2008: Task Scheduler runs programs twice or late

    - by SomeName
    Hi, I need to restart a service every day. I have logon hours restricted at 3:00 am, and the server will logout existing TS connections. I have two tasks scheduled: "Daily At 3:20 am every day" "start a program" "c:\windows\system32\sc.exe stop myservice" "Daily At 3:22 am every day" "start a program" "c:\windows\system32\sc.exe start myservice" I came in today to notice that the service wasn't running. I've been digging in logs, and found these entries: For stop task, history: a) 3:29:35 am: Action Completed (sc result code 0) b) 3:20:00 am: Action Completed (sc result code 0) For start task, history: a) 3:29:35 am: Action Completed (sc result code ERROR_SERVICE_ALREADY_RUNNING 1056 (0x420)) b) 3:22:01 am: Action Completed (sc result code 0) Checking event logs shows me: a) 3:29:35 am, Application log, Source myservice, "The service was stopped" b) 3:29:25 am, System log, Source Service Control Manager, "The myservice service entered the stopped state" So, What would have caused both tasks to run at 3:29 am? Why don't I see a message from the SCM saying that the service entered the running state? Is this the preferred way to do this? Thanks!

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  • I can't program because the code I am using uses old coding styles. Is this normal to programmers? [closed]

    - by Renato Dinhani Conceição
    I'm in my first real job as programmer, but I can't solve any problems because of the coding style used. The code here: Does not have comments Does not have functions (50, 100, 200, 300 or more lines executed in sequence) Uses a lot of if statements with a lot of paths Has variables that make no sense (eg.: cf_cfop, CF_Natop, lnom, r_procod) Uses an old language (Visual FoxPro 8 from 2002), but there are new releases from 2007. I feel like I have gone back to 1970. Is it normal for a programmer familiar with OOP, clean-code, design patterns, etc. to have trouble with coding in this old-fashion way? EDIT: All the answers are very good. For my (un)hope, appears that there are a lot of this kind of code bases around the world. A point mentioned to all answers is refactor the code. Yeah, I really like to do it. In my personal project, I always do this, but... I can't refactor the code. Programmers are only allowed to change the files in the task that they are designed for. Every change in old code must be keep commented in the code (even with Subversion as version control), plus meta informations (date, programmer, task) related to that change (this became a mess, there are code with 3 used lines and 50 old lines commented). I'm thinking that is not only a code problem, but a management of software development problem.

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  • I didn't mean to become a database developer, but now I am. Should I stop or try to get better?

    - by pretlow majette
    20 years ago I couldn't afford even a cheap POS program when I opened my first surf shop in the Virgin Islands. I bought a copy of Paradox (remember that?) in 1990 and spent months in a back room scratching out a POS application. Over many iterations, including a switch to Access (2000)/SQL Server (2003), I built a POS and backoffice solution that runs four stores with multiple cash registers, a warehouse and office. Until recently, all my stores were connected to the same LAN (in a small shopping center) and performance wasn't an issue. Now that we've opened a location in the States that's changed. Connecting to my local server via the internet has slowed that locations application to a crawl. This is partly due to the slow and crappy dsl service we have in the Virgin Islands, and partly due to my less-than-professional code and sql. With other far-away stores in the works, I need a better solution. I like my application. My staff knows it well, and I'm not inclined to take on the expense of a proper commercial solution. So where does that leave me? I should probably host my sql online to sidestep the slow dsl here. I think I can handle cleaning up my SQL querries to speed that up a bit. What about Access? My version seems so old, but I don't like the newer versions with the 'ribbon'. There are so many options... Should I be learning Visual Studio with an eye on moving completely to the web? Will my VBA skills help me at all there? I don't have the luxury of a year at the keyboard to figure it out anymore. What about dotnetnuke, sharepoint, or lightswitch? They all seem like possibilities, but even understanding their capabilities is daunting. I'm pretty deep into it, but maybe I should bail and hire a consultant or programmer. That sounds expensive tho, and there's no guarantee there either... Any advice would be greatly appreciated. Or, if anybody is interested in buying a small chain of surf shops...

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  • HTML5 Canvas A* Star Path finding

    - by Veyha
    I am trying to learn A* Star Path finding. Library I am using this - https://github.com/qiao/PathFinding.js But I am don't understand one thing how to do. I am need find path from player.x/player.y (player.x and player.y is both 0) to 10/10 This code return array of where I am need to move - var path = finder.findPath(player.x, player.y, 10, 10, grid); I am get array where I am need to move, but how to apply this array to my player.x and player.y? Array structure like - 0: 0 1: 0 length: 2, 0: 1 1: 0 length: 2, ... I am very sorry for my bad English language. Thanks.

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  • I enabled and setup glBlendFunc, but my texture has a white outline. What am I doing wrong?

    - by vinzBad
    You can see most of my source code in this question: Instead of the specified Texture, black circles on a green background are getting rendered. Why? Now I have the problem, that my texture has a white outline on its transparent parts. After googling and setting up glBlendFunc, the outline just got "softer". This is how it looks like: This is how I now setup OpenGL: public static void SetupGL() { GL.Enable(EnableCap.Blend); GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha); GL.Enable(EnableCap.Texture2D); GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest); }

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  • Can't delete folder and I am admin. "You need permission to perform this action. You require permission from..."

    - by Tony_Henrich
    I can't delete a certain folder in windows 7. It's not a system folder. It was created by an app. I get an error message "You need permission to perform this action. You require permission from Tony....". I am an admin and logged in as myself Tony. I have full ownership of the folder with full control permission. I rebooted the machine. I killed the app which created the folder. I am out of ideas. Why is Windows 7 not letting me delete the folder?

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  • Oracle (xe) 10 vs 11 . Have I lost the SQL tuning pages ? Am I going out of my mind?

    - by Richard Green
    Ok .. so perhaps the title needs calming down a bit, but basically I am after the xe 11g equivalent of the pages that you can see here : http://docs.oracle.com/cd/B25329_01/doc/admin.102/b25107/getstart.htm#BABHJAGE whcih you can then navigate to stuff like "top 50 queries" and "longest running queries" etc etc. For the life of me, I can't find that on the most recent xe edition. Please can someone direct me to where I might find these very useful admin pages ! Or was I imagining it all along :-/ Edit: These are the pages I am after: http://docs.oracle.com/cd/B25329_01/doc/admin.102/b25107/monitoring.htm

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