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  • Is it bad practice to select upstream servers based upon the HTTP method?

    - by PartlyCloudy
    I'm wondering if it is bad practice to have a reverse proxy that selects the upstream server depending on the HTTP method used? The background is that I have an abitrary web server that handles POST requests with some logic behind. The same resources also contain static content, that can be retrieved using GET. After some benchmarking I realized that nginx would handle the static content way faster than my abitrary web server doing this. I checked the option to forward incoming requests internally using nginx, which is feasible. But this would lead to the fact that different servers would serve a distinct resource, only depending on issuing a GET or POST, including different header fields.

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  • How can I load an MP3 or similar music file for display and anaysis in wxWdigets?

    - by Jon Cage
    I'm developing a GUI in wxPython which allows a user to generate sequences of colours for some toys I'm building. Part of the program needs to load an MP3 (and potentially other formats further down the line) and display it to the user. That shuold be sufficient to get started but later I'd like to add features like identifying beats and some crude frequency analysis. Is there any simple way of loading / understanding an MP3's contents to display a plot of it's amplitudes to the screen using wxWidgets? I later intend to port to C++/wxWidgets for speed and to avoid having to distribute wxPython.

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  • Is it a bad idea to create tests that rely on each other within a test fixture?

    - by nbolton
    For example: // NUnit-like pseudo code (within a TestFixture) Ctor() { m_globalVar = getFoo(); } [Test] Create() { a(m_globalVar) } [Test] Delete() { // depends on Create being run b(m_globalVar) } … or… // NUnit-like pseudo code (within a TestFixture) [Test] CreateAndDelete() { Foo foo = getFoo(); a(foo); // depends on Create being run b(foo); } … I’m going with the later, and assuming that the answer to my question is: No, at least not with NUnit, because according to the NUnit manual: The constructor should not have any side effects, since NUnit may construct the class multiple times in the course of a session. ... also, can I assume it's bad practice in general? Since tests can usually be run separately. So the result of Create may never be cleaned up by Delete.

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  • Is it bad practice to use Reflection in Unit testing?

    - by Sebi
    During the last years I always thought that in Java, Reflection is widely used during Unit testing. Since some of the variables/methods which have to be checked are private, it is somehow necessary to read the values of them. I always thought that the Reflection API is also used for this purpose. Last week i had to test some packages and therefore write some JUnit tests. As always i used Reflection to access private fields and methods. But my supervisor who checked the code wasn't really happy with that and told me that the Reflection API wasn't meant to use for such "hacking". Instead he suggested to modifiy the visibility in the production code. Is it really bad practice to use Reflection? I can't really believe that

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  • How to check if Google Street View available and display message?

    - by Vafello
    I am passing lat and lng variables and display google sreet view in a div. The problem is that when the StreetView is unavilable then nothing is displayed. I would like to check if there is a streetview for a given lat and lng and display a message. Here is my code: var myPano = new GStreetviewPanorama(document.getElementById("street2"), panoOpts); var location = new GLatLng(lat,lng) myPano.setLocationAndPOV(location); Maybe I should use something like: Event.addListener(myPano, "error", errorMessage()); Any ideas?

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  • Is prefixing Windows Forms control names with their type OK?

    - by name
    I have seen many responses that say that prefixing variables with their type is bad, since C# is statically typed and we have Intellisense, but I find that prefixing the names of the controls is useful because I don't need to remember the name of the controls or switch to the designer frequently. For example: btnLoad // Button tbFilePath // TextBox tvFileSystem // TreeView Is this considered bad? If it is, what's the alternative?

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  • Why is this consider bad practice? or is it? (ASP.Net)

    - by user318573
    Would this code be considered bad practice: <div id="sidebar"> <% =DisplayMeetings(12) %> </div> This is a snippet of code from the default.aspx of a small web app I have worked on. It works perfectly well, runs very fast, but as always, I am aware of the fact that just because it works, doesn't mean it is OK. Basically, the DisplayMeetings subroutine outputs a bunch of formatted HTML (an unordered list actually), with no formatting, just the requisite html, and then my CSS performs all the necessary formatting. The data for generating the list comes from an SQL server database (the parameter controls how many rows to return) and I am using stored procedures and datareader for fast access. This keeps my front-end extraordinary simple and clean, imho, and lets me do all the work in VB or C# in a separate module. I could of course use a databound repeater (and probably 6 or more other methods) of accomplishing the same thing, but are they any better? Other than loosing the design-time features of VS2010?

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  • Is it bad practice to initialize a variable to a dummy value?

    - by froadie
    This question is a result of the answers to this question that I just asked. It was claimed that this code is "ugly" because it initializes a variable to a value that will never be read: String tempName = null; try{ tempName = buildFileName(); } catch(Exception e){ ... System.exit(1); } FILE_NAME = tempName; Is this indeed bad practice? Should one avoid initializing variables to dummy values that will never actually be used? (EDIT - And what about initializing a String variable to "" before a loop that will concatenate values to the String...? Or is this in a separate category? e.g. String whatever = ""; for(String str : someCollection){ whatever += str; } )

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  • What do I have to do to get Firefox to display the add-on bar and XUL simultaneously?

    - by SmileAndNod
    On MDN, the phrase "Add-on Manager-enabled XUL" is introduced. By dragging a XPI file containing an add-on and dropping it onto a FireFox window, the addon's widgets will be installed in FireFox's add-on bar. By specifying the commandline option "-app application.ini" at the root of a chrome-structured directory, Firefox will display XUL using chrome:// protocol. Since MDN makes me think that the two are not mutually exclusive, my question is, "What do I have to do to get Firefox 8.0.1 to display the add-on bar and XUL simultaneously?"

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  • Are Domain Specific Languages (DSL) bad for the Common Programmer?

    - by iestyn
    I have lately been delving into F# and the new DSL stuff as in the Microsoft SQL Server Modelling CTP, and have some concerns. Will this new idea that will come about be bad for skilled programmers? Is code going to be dumbed down? I know I sound like a luddite, but this does worry me, after spending years of time practising in my craft, and now might be scuttled by genius from within. I am afraid, very afraid. Will I be now trapped in a job that only programs against a DSL and therefore every job that I work on, I have to learn a whole new DSL based on top of a Framework (.net Java), that I will only be allowed to touch certain parts of. I don't think the world is ready for DSL, but the sales pitch is deafening!

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  • is it a bad idea to load into memory 160000 variables in a php script?

    - by user1397417
    im processing a large file with sentences, i only care about the lines that have english or japanese, so while im reading the file, if i find english or japanese sentence, i want to just save it in an array and after finished reading, open another file for writting and output all the sentences in the array. this would result in me setting about 160,000 variables. all strings, some short some long. just wondering if its a bad idea to for memeory to set so many values? example line from the file: "1978033 jpn ?????????????????????"

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  • how can i download a set of variable images in flex/as3 and display them?

    - by james
    hi guys.... suppose i have 10 image variables like this var image1:String = http://somewhere.com/image1.jpg var image2:string = .....image2.jpg var image3:string = .....image3.jpg and so forth......... i have a timer that displays each variable as an image one a time .... how do i "buffer" the image and display them instead of going out each time the timer runs? im asking because sometimes the server could slow or some other reason. so what i want to do is to download all those images and then display them from the clients computer. some sort like @Embed ??? complete newbie.. so please go slow on me ... :p

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  • The provided URI scheme 'https' is invalid; expected 'http'. Parameter name: via

    - by isg
    I am trying to make a WCF service over basicHttpBinding to be used over https. Here's my web.config: <service behaviorConfiguration="MyServices.PingResultServiceBehavior" name="MyServices.PingResultService"> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="defaultBasicHttpBinding" contract="MyServices.IPingResultService"> <identity> <dns value="localhost" /> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> ... <bindings> <basicHttpBinding> <binding name="defaultBasicHttpBinding"> <security mode="Transport"> <transport clientCredentialType="None"/> </security> </binding> </basicHttpBinding> </bindings> ... I am connecting using WCFStorm which is able to retrieve all the meta data properly, but when I call the actual method I get: The provided URI scheme 'https' is invalid; expected 'http'. Parameter name: via Any ideas?

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  • Start TabActivity from ListActivity (which is content of parent TabActivity) in Android

    - by barmaleikin
    Hi guys, I have problems with switching between activities. I have two TabActivities (A and B), each of of tab activity has 4 tabs with ListActivity. I am trying to show B activity onListItemClick. Code on click is: Intent intent = new Intent(getApplicationContext(), TabBActivity.class); startActivity(intent); My manifest file is following: <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="true"> <activity android:name=".SplashScreen" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TabAActivity"> <intent-filter> <action android:name="com.TabAActivity" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".TabAListActivityA" android:label="AA"/> <activity android:name=".TabAListActivityB" android:label="AB"/> <activity android:name=".TabAListActivityC" android:label="AC"/> <activity android:name=".TabBActivity" android:label="B"/> <activity android:name=".TabAListBctivityA" android:label="BA"/> <activity android:name=".TabAListBctivityB" android:label="BB"/> <activity android:name=".TabAListBctivityC" android:label="BC"/> </application> </manifest> Is my manifest correct or maybe something is wrong with code? I would appreciate any help on this topic.

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  • beginning oop php question: do constructors take the place of getter?

    - by Joel
    I'm working through this tutorial: http://www.killerphp.com/tutorials/object-oriented-php/php-objects-page-3.php At first he has you create a setter and getter method in the class: <?php class person{ var $name; function set_name($new_name){ $this->name=$new_name; } function get_name(){ return $this->name; } } php?> And then you create the object and echo the results: <?php $stefan = new person(); $jimmy = new person(); $stefan ->set_name("Stefan Mischook"); $jimmy ->set_name("Nick Waddles"); echo "The first Object name is: ".$stefan->get_name(); echo "The second Object name is: ".$jimmy->get_name(); ?> Works as expected, and I understand. Then he introduces constructors: class person{ var $name; function __construct($persons_name) { $this->name = $persons_name; } function set_name($new_name){ $this->name=$new_name; } function get_name(){ return $this->name; } } And returns like so: <?php $joel = new person("Joel"); echo "The third Object name is: ".$joel->get_name(); ?> This is all fine and makes sense. Then I tried to combine the two and got an error, so I'm curious-is a constructor always taking the place of a "get" function? If you have a constructor, do you always need to include an argument when creating an object? Gives errors: <?php $stefan = new person(); $jimmy = new person(); $joel = new person("Joel Laviolette"); $stefan ->set_name("Stefan Mischook"); $jimmy ->set_name("Nick Waddles"); echo "The first Object name is: ".$stefan->get_name(); echo "The second Object name is: ".$jimmy->get_name(); echo "The third Object name is: ".$joel->get_name(); ?>

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  • save xml object so that elements are in sorted order in saved xml file

    - by scot
    Hi , I am saving a xml document object and it is saved in a xml file as shown below . <author name="tom" book="Fun-II"/> <author name="jack" book="Live-I"/> <author name="pete" book="Code-I"/> <author name="jack" book="Live-II"/> <author name="pete" book="Code-II"/> <author name="tom" book="Fun-I"/> instead i want to sort the content in document object so that when i persist the object it is saved by grouping authors then book name as below: <author name="jack" book="Live-I"/> <author name="jack" book="Live-II"/> <author name="pete" book="Code-I"/> <author name="pete" book="Code-II"/> <author name="tom" book="Fun-I"/> <author name="tom" book="Fun-II"/> I use apache xml beans..any ideas on how to achieve this? thanks.

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  • How can I use Performance Counters in C# to monitor 4 processes with the same name?

    - by Waffles
    I'm trying to create a performance counter that can monitor the performance time of applications, one of which is Google Chrome. However, I notice that the performance time I get for chrome is unnaturally low - I look under the task-manager to realize my problem that chrome has more than one process running under the exact same name, but each process has a different working set size and thus(what I would believe) different processor times. I tried doing this: // get all processes running under the same name, and make a performance counter // for each one. Process[] toImport = Process.GetProcessesByName("chrome"); instances = new PerformanceCounter[toImport.Length]; for (int i = 0; i < instances.Length; i++) { PerformanceCounter toPopulate = new PerformanceCounter ("Process", "% Processor Time", toImport[i].ProcessName, true); //Console.WriteLine(toImport[i].ProcessName + "#" + i); instances[i] = toPopulate; } But that doesn't seem to work at all - I just monitor the same process several times over. Can anyone tell me of a way to monitor separate processes with the same name?

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  • How to do custom display and auto-select in django admin multi-select field?

    - by rsp
    I'm new to django, so please feel free to tell me if I'm doing this incorrectly. I am trying to create a django ordering system. My order model: class Order(models.Model): ordered_by = models.ForeignKey(User, limit_choices_to = {'groups__name': "Managers", 'is_active': 1}) in my admin ANY user can enter an order, but ordered_by must be someone in the group "managers" (this is the behavior I want). Now, if the logged in user happens to be a manager I want it to automatically fill in the field with that logged in user. I have accomplished this by: class OrderAdmin(admin.ModelAdmin): def formfield_for_foreignkey(self, db_field, request, **kwargs): if db_field.name == "ordered_by": if request.user in User.objects.filter(groups__name='Managers', is_active=1): kwargs["initial"] = request.user.id kwargs["empty_label"] = "-------------" return db_field.formfield(**kwargs) return super(OrderAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs) This also works, but the admin puts the username as the display for the select box by default. It would be nice to have the user's real name listed. I was able to do it with this: class UserModelMultipleChoiceField(forms.ModelMultipleChoiceField): def label_from_instance(self, obj): return obj.first_name + " " + obj.last_name class OrderForm(forms.ModelForm): ordered_by = UserModelChoiceField(queryset=User.objects.all().filter(groups__name='Managers', is_active=1)) class OrderAdmin(admin.ModelAdmin): form = OrderForm My problem: I can't to both of these. If I put in the formfield_for_foreignkey function and add form = OrderForm to use my custom "UserModelChoiceField", it puts the nice name display but it won't select the currently logged in user. I'm new to this, but my guess is that when I use UserModelChoiceField it "erases" the info passed in via formfield_for_foreignkey. Do I need to use the super() function somehow to pass on this info? or something completely different?

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  • AVL tree in C language

    - by I_S_W
    Hey all; i am currently doing a project that requires the use of AVL trees , the insert function i wrote for the avl does not seem to be working , it works for 3 or 4 nodes at maximum ; i would really appreciate your help The attempt is below enter code here Tree insert(Tree t,char name[80],int num) { if(t==NULL) { t=(Tree)malloc(sizeof(struct node)); if(t!=NULL) { strcpy(t->name,name); t->num=num; t->left=NULL; t->right=NULL; t->height=0; } } else if(strcmp(name,t->name)<0) { t->left=insert(t->left,name,num); if((height(t->left)-height(t->right))==2) if(strcmp(name,t->left->name)<0) { t=s_rotate_left(t);} else{ t=d_rotate_left(t);} } else if(strcmp(name,t-name)0) { t-right=insert(t-right,name,num); if((height(t-right)-height(t-left))==2) if(strcmp(name,t-right-name)0){ t=s_rotate_right(t); } else{ t=d_rotate_right(t);} } t-height=max(height(t-left),height(t-right))+1; return t; }

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