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• DDD/NHibernate Use of Aggregate root and impact on web design - ex. Editing children of aggregate ro

  - by pbrophy

  Hopefully, this fictitious example will illustrate my problem: Suppose you are writing a system which tracks complaints for a software product, as well as many other attributes about the product. In this case the SoftwareProduct is our aggregate root and Complaints are entities that only can exist as a child of the product. In other words, if the software product is removed from the system, so shall the complaints. In the system, there is a dashboard like web page which displays many different aspects of a single SoftwareProduct. One section in the dashboard, displays a list of Complaints in a grid like fashion, showing only some very high level information for each complaint. When an admin type user chooses one of these complaints, they are directed to an edit screen which allows them to edit the detail of a single Complaint. The question is: what is the best way for the edit screen to retrieve the single Complaint, so that it can be displayed for editing purposes? Keep in mind we have already established the SoftwareProduct as an aggregate root, therefore direct access to a Complaint should not be allowed. Also, the system is using NHibernate, so eager loading is an option, but my understanding is that even if a single Complaint is eager loaded via the SoftwareProduct, as soon as the Complaints collection is accessed the rest of the collection is loaded. So, how do you get the single Complaint through the SoftwareProduct without incurring the overhead of loading the entire Complaints collection?

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• C# Gui setting control.Enabled to false fires OnClick event???

  - by Daniel

  For some really weird reason when i set the .Enabled property to false on a simple text box on a small GUI, it fires a radio buttons OnClick event and its causing lots of problems. I have breakpointed the txtBox.Enabled = false; and after stepping over OR into it i jump straight to the OnClick event of the radio button control Here is the call stack as that happened: TestGUI.exe!TestGUI.frmMain.radiobuttonClicked(object sender = {Text = "Download Single Episode" Checked = true}, System.EventArgs e = {System.EventArgs}) Line 67 C# System.Windows.Forms.dll!System.Windows.Forms.Control.OnClick(System.EventArgs e) + 0x70 bytes System.Windows.Forms.dll!System.Windows.Forms.RadioButton.OnClick(System.EventArgs e) + 0x27 bytes System.Windows.Forms.dll!System.Windows.Forms.RadioButton.OnEnter(System.EventArgs e = {System.EventArgs}) + 0x3e bytes System.Windows.Forms.dll!System.Windows.Forms.Control.NotifyEnter() + 0x20 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.UpdateFocusedControl() + 0x195 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.AssignActiveControlInternal(System.Windows.Forms.Control value = {Text = "Download Single Episode" Checked = true}) + 0x54 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActivateControlInternal(System.Windows.Forms.Control control, bool originator = false) + 0x76 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControlInternal(System.Windows.Forms.Control value = {Text = "Download Single Episode" Checked = true}) + 0x73 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControl(System.Windows.Forms.Control ctl) + 0x33 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActiveControl.set(System.Windows.Forms.Control value) + 0x5 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.Select(bool directed, bool forward) + 0x1b bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControl(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x7b bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControlInternal(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x4a bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextIfFocused() + 0x61 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.Enabled.set(bool value) + 0x42 bytes What the hell? It wouldn't have anything to do with the way i subscribe to the events would it? this.radioBtnMultipleDownload.Click += radiobuttonClicked; this.radioBtnSingleDownload.Click += radiobuttonClicked; this.radioCustomUrl.Click += radiobuttonClicked;

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• How to best transfer large payloads of data using wsHttp with WCF with message security

  - by jpierson

  I have a case where I need to transfer large amounts of serialized object graphs (via NetDataContractSerializer) using WCF using wsHttp. I'm using message security and would like to continue to do so. Using this setup I would like to transfer serialized object graph which can sometimes approach around 300MB or so but when I try to do so I've started seeing a exception of type System.InsufficientMemoryException appear. After a little research it appears that by default in WCF that a result to a service call is contained within a single message by default which contains the serialized data and this data is buffered by default on the server until the whole message is completely written. Thus the memory exception is being caused by the fact that the server is running out of memory resources that it is allowed to allocate because that buffer is full. The two main recommendations that I've come across are to use streaming or chunking to solve this problem however it is not clear to me what that involves and whether either solution is possible with my current setup (wsHttp/NetDataContractSerializer/Message Security). So far I understand that to use streaming message security would not work because message encryption and decryption need to work on the whole set of data and not a partial message. Chunking however sounds like it might be possible however it is not clear to me how it would be done with the other constraints that I've listed. If anybody could offer some guidance on what solutions are available and how to go about implementing it I would greatly appreciate it. Related resources: Chunking Channel How to: Enable Streaming Large attachments over WCF Custom Message Encoder Another spotting of InsufficientMemoryException I'm also interested in any type of compression that could be done on this data but it looks like I would probably be best off doing this at the transport level once I can transition into .NET 4.0 so that the client will automatically support the gzip headers if I understand this properly.

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• "Pretty" Continuous Integration for Python

  - by dbr

  This is a slightly.. vain question, but BuildBot's output isn't particularly nice to look at.. For example, compared to.. phpUnderControl Hudson CruiseControl.rb ..and others, BuildBot looks rather.. archaic I'm currently playing with Hudson, but it is very Java-centric (although with this guide, I found it easier to setup than BuildBot, and produced more info) Basically: is there any Continuous Integration systems aimed at python, that produce lots of shiney graphs and the likes? Update: After trying a few alternatives, I think I'll stick with Hudson. Integrity was nice and simple, but quite limited. I think Buildbot is better suited to having numerous build-slaves, rather than everything running on a single machine like I was using it. Setting Hudson up for a Python project was pretty simple: Download Hudson from https://hudson.dev.java.net/ Run it with java -jar hudson.war Open the web interface on the default address of http://localhost:8080 Go to Manage Hudson, Plugins, click "Update" or similar Install the Git plugin (I had to set the git path in the Hudson global preferences) Create a new project, enter the repository, SCM polling intervals and so on Install nosetests via easy_install if it's not already In the a build step, add nosetests --with-xunit --verbose Check "Publish JUnit test result report" and set "Test report XMLs" to **/nosetests.xml That's all that's required. You can setup email notifications, and the plugins are worth a look. A few I'm currently using for Python projects: SLOCCount plugin to count lines of code (and graph it!) - you need to install sloccount separately Violations to parse the PyLint output (you can setup warning thresholds, graph the number of violations over each build) Cobertura can parse the coverage.py output. Nosetest can gather coverage while running your tests, using nosetests --with-coverage (this writes the output to **/coverage.xml)

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• Combinations into pairs

  - by Will

  I'm working on a directed network problem and trying to compute all valid paths between two points. I need a way to look at paths up to 30 "trips" (represented by an [origin, destination] pair) in length. The full route is then composed of a series of these pairs: route = [[start, city2], [city2, city3], [city3, city4], [city4, city5], [city5, city6], [city6, city7], [city7, city8], [city8, stop]] So far my best solution is as follows: def numRoutes(graph, start, stop, minStops, maxStops): routes = [] route = [[start, stop]] if distance(graph, route) != "NO SUCH ROUTE" and len(route) >= minStops and len(route) <= maxStops: routes.append(route) if maxStops >= 2: for city2 in routesFromCity(graph, start): route = [[start, city2],[city2, stop]] if distance(graph, route) != "NO SUCH ROUTE" and len(route) >= minStops and len(route) <= maxStops: routes.append(route) if maxStops >= 3: for city2 in routesFromCity(graph, start): for city3 in routesFromCity(graph, city2): route = [[start, city2], [city2, city3], [city3, stop]] if distance(graph, route) != "NO SUCH ROUTE" and len(route) >= minStops and len(route) <= maxStops: routes.append(route) if maxStops >= 4: for city2 in routesFromCity(graph, start): for city3 in routesFromCity(graph, city2): for city4 in routesFromCity(graph, city3): route = [[start, city2], [city2, city3], [city3, city4], [city4, stop]] if distance(graph, route) != "NO SUCH ROUTE" and len(route) >= minStops and len(route) <= maxStops: routes.append(route) if maxStops >= 5: for city2 in routesFromCity(graph, start): for city3 in routesFromCity(graph, city2): for city4 in routesFromCity(graph, city3): for city5 in routesFromCity(graph, city4): route = [[start, city2], [city2, city3], [city3, city4], [city4, city5], [city5, stop]] if distance(graph, route) != "NO SUCH ROUTE" and len(route) >= minStops and len(route) <= maxStops: routes.append(route) return routes Where numRoutes is fed my network graph where numbers represent distances: [[0, 5, 0, 5, 7], [0, 0, 4, 0, 0], [0, 0, 0, 8, 2], [0, 0, 8, 0, 6], [0, 3, 0, 0, 0]] a start city, an end city and the parameters for the length of the routes. distance checks if a route is viable and routesFromCity returns the attached nodes to each fed in city. I have a feeling there's a far more efficient way to generate all of the routes especially as I move toward many more steps, but I can't seem to get anything else to work.

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• Send Data Using the WebRequest Class to DotNetOpenAuth website

  - by Denis

  I am trying to send data to DotNetOpenAuth website as described here http://msdn.microsoft.com/en-us/library/debx8sh9.aspx Sender receive (500) Internal Server Error. The same code for blank website without DotNetOpenAuth works fine. Should I tweak something? Here is an exception: System.ArgumentNullException was unhandled by user code Message="Value cannot be null.\r\nParameter name: key" Source="mscorlib" ParamName="key" StackTrace: at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value) at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 145 at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\Messaging\Channel.cs:line 372 at DotNetOpenAuth.OAuth.ServiceProvider.ReadRequest(HttpRequestInfo request) in c:\BuildAgent\work\7ab20c0d948e028f\src\DotNetOpenAuth\OAuth\ServiceProvider.cs:line 222 Exception occurs on last line of the code: private void context_AuthenticateRequest(object sender, EventArgs e) { // Don't read OAuth messages directed at the OAuth controller or else we'll fail nonce checks. if (this.IsOAuthControllerRequest()) { return; } if (HttpContext.Current.Request.HttpMethod != "HEAD") { // workaround: avoid involving OAuth for HEAD requests. IDirectedProtocolMessage incomingMessage = OAuthServiceProvider.ServiceProvider.ReadRequest(new HttpRequestInfo(this.application.Context.Request));

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• Roadmap to Android development

  - by Matthew

  Hello, I've done a little research, and am interested in developing for Android. I've never programmed before, and have no idea how to go from zero experience to developing for a mobile device. My interest is in eventually making some sort of 2d game. Is there a lesson plan for starting from the ground up? I would think one would need to learn the Java language to start. Looking at the Sun website, it's a bit daunting. Is there a book, specifically, that would wrap up this knowledge in a bit of a directed lesson plan? I'm not sure if opengl-es is what would be required for 2d games. I've done a little research on this, and it's even far more daunting than Java itself. I can't even begin to figure out where to start with even just opengl, sans -es. My best guess would be that I need further knowledge in Java to continue with this, but even still, is it possible to learn concurrently with Java?

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• How can I add a link with a UID from a User Reference from a table in Drupal Views

  - by pduncan

  I have the following in Drupal 6: A Master CCK type which contains a User reference field and other fields. There will only be one record per user here. A View of this CCK, shown as a table, with one of the fields being the user ref from the CCK type. This field is initially shown as a user name, linking to the user profile. A Second CCK type which can have several pieces of data about a particular user. A View for this CCK type, displaying information as a table. It takes a user id as an argument (an integer) I want to click on the user name in the master view, and be directed to the detail view for this user. To do this, I tried selecting 'Output this field as a link' on the user field. The thing available for me to replace are: Fields * [field_my_user_ref_uid_1] == Content: User (field_my_user_ref) Arguments * %1 == User: Uid However, the [field_my_user_ref_uid_1] element is replaced by the user name, and %1 seems to get replaced with an empty string. How can I put the user id in here?

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• How do you use asynchronous ORMs without huge callback chains?

  - by hornairs

  I'm using the relatively immature Joose Javascript ORM plugin (project page) to persist objects in an Appcelerator Titanium (company page) mobile project. Since it's client side storage, the application has to check to see if the database is initialized before starting up the ORM since it inspects the DB tables to construct the classes. My problem is that this sequence of operations (and if this one is like this, other things down the road) takes a lot of callbacks to complete. I have a lot of jumping around in the code that isn't apparent to a maintainer and results in some complex call graphs and whatnot. So, I ask these questions: How would you asynchronously initialize a database and populate it with seed data using an ORM that needs the schema to be correct to function? Do you have any general strategies or links for async/event driven programming and keeping the call graph simple and understandable? Do you have any suggestions for Javascript ORMs/meta object systems that work with HTML 5 as a storage engine and are hopefully framework agnostic? Am I just a big newb and should be able to work this out with ease? Thanks folks!

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• OJB Reference Descriptor 1:0 relationship? Should I set auto-retrieve to false?

  - by godzillasdm

  Hi, I am having an issue while using Apache OJB with Spring 2 inside my web app. I'm using OJB reference-descriptor with 2 foreign key properties. I have an object A (parent) and object B (referenced object). The thing is, for an object A, there may or may not be an object B. In the case where there is no object B to go with Object A, the object B seems to be instantiated (through Spring?) anyways. However, I am unable to access object B's members. Whenever I test if Object B == null, it always returns false even though there is no matching value in the database. Since this Object is never null, I figured I can test the object's member like so: if( objectb.getDocumentNumber == null) { return false; } However, I get an exception in the jsp: javax.servlet.jsp.el.ELException: An error occurred while getting property "documentNumber" from an instance class org.sample.pojo.Objectb$$EnhancerByCGLIB$$78022a2 and this exception in the debugger when it's creating the objectB: com.sun.jdi.InvocationException occurred invoking method. I am guessing that the reference-descriptor must be a 1:1+ relationship, instead of a 1:0+ relationship. I was wondering if I should set the property 'auto-retrieve' to false, and then use the PersistenceBroker.retrieveAllReferences(Object obj); method as directed. However, this method's return value is 'void', so I am guessing that Spring somehow creates, and sets the reference class for me. (Returning me back to the same issue I'm having.) I will need a way to test whether the reference object exists first. If not, don't call this retrieveAllReferences method, but I don't see how. Am I going about this all wrong? Does reference-descriptor not allow 1:0 relations? Any work around to my problem? Your suggestions are greatly appreciated!

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• How to Create PDF from HTML using perl

  - by Octopus

  I need to create a PDF file from the html I have created usign rrdcgi. This page contains the details and graphs in png format. I have written the below code using perl module HTML::HTMLDoc to create a pdf file using saved html file. The images are of size width 1048 and hight 266 but when creating a pdf file the images are not shown completly from the right side. #!/usr/bin/perl use strict; use warnings; use HTML::HTMLDoc; my $filename = shift; my $htmldoc = new HTML::HTMLDoc(); $htmldoc->set_input_file($filename); $htmldoc->no_links(); $htmldoc->landscape(); $htmldoc->set_jpeg_compression('50'); $htmldoc->best_image_quality(); $htmldoc->color_on(); $htmldoc->set_right_margin('1', 'mm'); $htmldoc->set_left_margin('1', 'mm'); $htmldoc->set_bodycolor('#FFFFFF'); $htmldoc->set_browserwidth('1000'); my $pdf = $htmldoc->generate_pdf(); print $pdf->to_string(); $pdf->to_file('foo.pdf'); I need help on following items: 1) How to display the complete image on page. 2) How to set a link on html page to create pdf file with the contents on the current page. Any help with the perl code would be really appreciated.

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• help in the Donalds B. Johnson's algorithm, i cannot understand the pseudo code

  - by Pitelk

  Hi , does anyone know the Donald B. Johnson's algorithm which enumarates all the elementary circuits (cycles) in a Directed graph? link text I have the paper he had published in 1975 but I cannot understand the pseudo-code. My goal is to implement this algorithm in java. Some questions i have is for example what is the matrix Ak it refers to. In the pseudo code mentions that Ak:=adjacency structure of strong component K with least vertex in subgraph of G induced by {s,s+1,....n}; Does that mean i have to implement another algorithm that finds the Ak matrix? Another question is what the following means? begin logical f; Does also the line "logical procedure CIRCUIT (integer value v);" means that the circuit procedure returns a logical variable. In the pseudo code also has the line "CIRCUIT := f;" . Does this mean? It would be great if someone could translate this 1970's pseudocode to a more modern type of pseudo code so i can understand it in case you are interested to help but you cannot find the paper please email me at [email protected] and i will send you the paper. Thanks in advance

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• Java JUnit: The method X is ambiguous for type Y

  - by Rosarch

  I had some tests working fine. Then, I moved it to a different package, and am now getting errors. Here is the code: import static org.junit.Assert.*; import java.util.HashSet; import java.util.Map; import java.util.Set; import org.jgrapht.Graphs; import org.jgrapht.WeightedGraph; import org.jgrapht.graph.DefaultWeightedEdge; import org.jgrapht.graph.SimpleWeightedGraph; import org.junit.*; @Test public void testEccentricity() { WeightedGraph<String, DefaultWeightedEdge> g = generateSimpleCaseGraph(); Map<String, Double> eccen = JGraphtUtilities.eccentricities(g); assertEquals(70, eccen.get("alpha")); assertEquals(80, eccen.get("l")); assertEquals(130, eccen.get("l-0")); assertEquals(100, eccen.get("l-1")); assertEquals(90, eccen.get("r")); assertEquals(120, eccen.get("r-0")); assertEquals(130, eccen.get("r-1")); } The error message is this: The method assertEquals(Object, Object) is ambiguous for the type JGraphtUtilitiesTest How can I fix this? Why did this problem occur as I moved the class to a different package?

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• Why don't the images fully display when I convert HTML to PDF with Perl's HTML::HTMLDoc?

  - by Octopus

  I need to create a PDF file from the HTML I have created usign rrdcgi. This page contains the details and graphs in PNG format. I have written the below code using Perl module HTML::HTMLDoc to create a PDF file using saved HTML file. The images are of size width 1048 and hight 266 but when creating a PDF file the images are not shown completly from the right side. #!/usr/bin/perl use strict; use warnings; use HTML::HTMLDoc; my $filename = shift; my $htmldoc = new HTML::HTMLDoc(); $htmldoc->set_input_file($filename); $htmldoc->no_links(); $htmldoc->landscape(); $htmldoc->set_jpeg_compression('50'); $htmldoc->best_image_quality(); $htmldoc->color_on(); $htmldoc->set_right_margin('1', 'mm'); $htmldoc->set_left_margin('1', 'mm'); $htmldoc->set_bodycolor('#FFFFFF'); $htmldoc->set_browserwidth('1000'); my $pdf = $htmldoc->generate_pdf(); $pdf->to_file('foo.pdf'); I need help on following items: 1) How do I display the complete image on page. 2) How do I set a link on HTML page to create PDF file with the contents on the current page. Any help with the Perl code would be really appreciated.

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• 2-step user registration with Django

  - by David S

  I'm creating a website with Django and want a fairly common 2-step user registration. What I mean by this is that the user fills in the some basic user information + some application specific information (sort of like a coupon value). Upon submit, an email is sent to ensure email address is valid. This email should contain a link to click on to "finish" the registration. When the link is clicked, the user is marked as validated and they are directed to a new page to complete optional "user profile" type information. So, pretty basic stuff. I have done some research and found django-registration by James Bennett. I do know who James is and have seen him at PyCons and DjanoCons in the past. There is obviously very few people in the world that know Django better than James (so, I know the quality of the code/app is good). But, it almost seems like a bit of over kill. I've read through the docs and was a bit confused (maybe I'm just being a bit dense today). I believe that if I do use django-registration, I will need to have some custom forms, etc. Is there anything else out there I should evaluate? Or are there any good tutorials or videos on using django-registration? I've done a bit of googling, but haven't found anything. But, I suspect that it might be a case of a lot of very common words that don't really find what you are looking for (django user registration tutorial/example). Or is just a case where it would be just about as easy to build your own solution with Django forms, etc? Here is the tech stack I'm using: Python 2.7.2 Django 1.3.1 PostgreSQL 9.1 psycopg2 2.4.1 Twitter Bootstrap 2.0.2

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• Scalable / Parallel Large Graph Analysis Library?

  - by Joel Hoff

  I am looking for good recommendations for scalable and/or parallel large graph analysis libraries in various languages. The problems I am working on involve significant computational analysis of graphs/networks with 1-100 million nodes and 10 million to 1+ billion edges. The largest SMP computer I am using has 256 GB memory, but I also have access to an HPC cluster with 1000 cores, 2 TB aggregate memory, and MPI for communication. I am primarily looking for scalable, high-performance graph libraries that could be used in either single or multi-threaded scenarios, but parallel analysis libraries based on MPI or a similar protocol for communication and/or distributed memory are also of interest for high-end problems. Target programming languages include C++, C, Java, and Python. My research to-date has come up with the following possible solutions for these languages: C++ -- The most viable solutions appear to be the Boost Graph Library and Parallel Boost Graph Library. I have looked briefly at MTGL, but it is currently slanted more toward massively multithreaded hardware architectures like the Cray XMT. C - igraph and SNAP (Small-world Network Analysis and Partitioning); latter uses OpenMP for parallelism on SMP systems. Java - I have found no parallel libraries here yet, but JGraphT and perhaps JUNG are leading contenders in the non-parallel space. Python - igraph and NetworkX look like the most solid options, though neither is parallel. There used to be Python bindings for BGL, but these are now unsupported; last release in 2005 looks stale now. Other topics here on SO that I've looked at have discussed graph libraries in C++, Java, Python, and other languages. However, none of these topics focused significantly on scalability. Does anyone have recommendations they can offer based on experience with any of the above or other library packages when applied to large graph analysis problems? Performance, scalability, and code stability/maturity are my primary concerns. Most of the specialized algorithms will be developed by my team with the exception of any graph-oriented parallel communication or distributed memory frameworks (where the graph state is distributed across a cluster).

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• Windows system monitoring and profiling

  - by Aris

  I have several dozen 64-bit Windows 2003 servers in a high performance environment with very bursty system utilization. I am looking for a tool (or tools) to monitor and analyze system performance (eg, CPU utilization, bandwidth, etc). This tool can either query servers from a central location (SNMP) or require installation of a component on each server. It should poll on a 1-second interval. It should be able to generate pretty graphs which show trends over time. As a nice-to-have, it should be able to send out emails or IMs when certain thresholds are exceeded. The tools I have investigated so far, including Solarwinds and PRTG, are not designed to poll this frequently. They seem to be designed for a ~30-second interval. Solarwinds wouldn't go lower than 3-sec, and PRTG chokes at 1-sec. They both default to 1-min. All three tools seem more focused on outage monitoring and reporting than metric collection. Given the bursty nature of our applications, such infrequent polling would result in a very inaccurate picture of performance. I am considering rolling my own solution using perfmon. This would be a lot of work, and seems like reinventing the wheel. Are there any tools out there that meet my needs?

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• OSMDroid simple example required

  - by Bex

  Hi! I am trying to create an app that uses offline maps and custom tiles. For this I have decided to use OSMDroid and have included the jar within my project. I will create my custom tiles using MOBAC. I have been directed to these examples: http://code.google.com/p/osmdroid/source/browse/#svn%2Ftrunk%2FOpenStreetMapViewer%2Fsrc%2Forg%2Fosmdroid%2Fsamples but I am struggling to follow them as I am new to both java and android. I have created a class file called test (which I have created following an example!): public class test extends Activity { /** Called when the activity is first created. */ protected static final String PROVIDER_NAME = LocationManager.GPS_PROVIDER; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MapView map = (MapView) findViewById(R.id.map); map.setTileSource(TileSourceFactory.MAPQUESTOSM); map.setBuiltInZoomControls(true); map.setMultiTouchControls(true); map.getController().setZoom(16); map.getController().setCenter(new GeoPoint(30266000, -97739000)); } } with a layout file: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <org.osmdroid.views.MapView android:id="@+id/map" android:layout_width="fill_parent" android:layout_height="fill_parent" tilesource="MapquestOSM" android:layout_weight="1" /> </LinearLayout> When I run this I see no map, just an empty grid. I think this is due to my tilesource but I'm not sure what I need to change it to. Can anyone help? Bex

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• how to compile with llvm and g++?

  - by Sriram

  Hi, I use a fedora-11 system and recently I installed llvm ( sudo yum -y install llvm llvm-docs llvm-devel ). When I search for llvm I get them in /usr/bin. some of the links to the binaries are broken(llvm-gcc,llvm-g++,llvm-cpp,etc.) the include files are found within /usr/include/llvm and libs at /usr/lib/llvm. How to compile them using g++? I tried to compile the kaleidoscope code given in the tutorial (http://llvm.org/docs/tutorial/LangImpl3.html) as per directed, but it fails to compile.. I get this... toy.cpp:5:30: error: llvm/LLVMContext.h: No such file or directory toy.cpp:352: error: ‘getGlobalContext’ was not declared in this scope toy.cpp: In member function ‘virtual llvm::Value* NumberExprAST::Codegen()’: toy.cpp:358: error: ‘getGlobalContext’ was not declared in this scope toy.cpp: In member function ‘virtual llvm::Value* BinaryExprAST::Codegen()’: toy.cpp:379: error: ‘getDoubleTy’ is not a member of ‘llvm::Type’ toy.cpp:379: error: ‘getGlobalContext’ was not declared in this scope toy.cpp: In member function ‘llvm::Function* PrototypeAST::Codegen()’: toy.cpp:407: error: ‘getDoubleTy’ is not a member of ‘llvm::Type’ toy.cpp:407: error: ‘getGlobalContext’ was not declared in this scope toy.cpp:408: error: ‘getDoubleTy’ is not a member of ‘llvm::Type’ toy.cpp: In member function ‘llvm::Function* FunctionAST::Codegen()’: toy.cpp:454: error: ‘getGlobalContext’ was not declared in this scope toy.cpp: In function ‘int main()’: toy.cpp:543: error: ‘LLVMContext’ was not declared in this scope toy.cpp:543: error: ‘Context’ was not declared in this scope toy.cpp:543: error: ‘getGlobalContext’ was not declared in this scope I cannot find the LLVMContext.h file too. so i guess this might be a version problem. what should i do to make it work? some help would be good! thanks in advance... :)

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• How to do fixed price quote for design sessions?

  - by Shaul

  Normally when I do a system for a customer, I do design sessions on an hourly rate and then come out with a fixed price quotation for the full system development. Now this customer has thrown me a curveball: he doesn't want an hourly rate for design, either - he wants me to quote a fixed price to do all the design, too! Not that he's trying to cheap out, but he doesn't want to be in a situation where the longer design stretches out, the more he has to pay - and I can understand that. For the business layer it was actually not too difficult to work with this, because from his original functional spec I got a good idea of what the core business objects were, and in our design agreement I defined several objects which would be covered by a fixed design price; if any new non-trivial objects were discovered, they would be considered variances, and those would be billed on an hourly rate. So far so good. But when it comes to the UI, things start getting a lot more woolly. How many screens will there be? Don't know yet. What's going to be on each screen? Don't know yet. All we know is that it's a "dashboard" type of system, and there will be a lot of visual reporting involved e.g. gauges, graphs, etc. So maybe make it fixed price per screen design? Not a great definition; he might say that everything is going to be on one screen. Maybe a price per "visual report" design, including ability to slice & dice? Again not so easy - it might be that the entire system is just one report, and all the intelligence is going to go into how to present that segmentation. Anyone have any ideas how to do a fixed price quotation for a UI design like this?

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• Shell script to emulate warnings-as-errors?

  - by talkaboutquality

  Some compilers let you set warnings as errors, so that you'll never leave any compiler warnings behind, because if you do, the code won't build. This is a Good Thing. Unfortunately, some compilers don't have a flag for warnings-as-errors. I need to write a shell script or wrapper that provides the feature. Presumably it parses the compilation console output and returns failure if there were any compiler warnings (or errors), and success otherwise. "Failure" also means (I think) that object code should not be produced. What's the shortest, simplest UNIX/Linux shell script you can write that meets the explicit requirements above, as well as the following implicit requirements of otherwise behaving just like the compiler: - accepts all flags, options, arguments - supports redirection of stdout and stderr - produces object code and links as directed Key words: elegant, meets all requirements. Extra credit: easy to incorporate into a GNU make file. Thanks for your help. === Clues === This solution to a different problem, using shell functions (?), Append text to stderr redirects in bash, might figure in. Wonder how to invite litb's friend "who knows bash quite well" to address my question? === Answer status === Thanks to Charlie Martin for the short answer, but that, unfortunately, is what I started out with. A while back I used that, released it for office use, and, within a few hours, had its most severe drawback pointed out to me: it will PASS a compilation with no warnings, but only errors. That's really bad because then we're delivering object code that the compiler is sure won't work. The simple solution also doesn't meet the other requirements listed. Thanks to Adam Rosenfield for the shorthand, and Chris Dodd for introducing pipefail to the solution. Chris' answer looks closest, because I think the pipefail should ensure that if compilation actually fails on error, that we'll get failure as we should. Chris, does pipefail work in all shells? And have any ideas on the rest of the implicit requirements listed above?

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• Pagination in Joomla!

  Hi every one. I'm a bit new to Joomla! and I'm building my new web site using Joomla! 1.5.8 with a template bought from RocketTheme. The long article in question is a gallery of photos, and I wanted to create a horizontal pagination nav-bar in the footer of the gallery, I just clicked pagebreak where I wanted to paginate in my article in the WYSIWYG editor and thought that it's actually all I have to do. What I got was ugly; a vertically directed navigation bar placed in the top right side of my gallery with the links to each part of the article, the all without the minimum styling. And as I see it's a table! Why not outputting a list instead of a table! (Well this is not actually my concern right now). I can understand CSS and html, but I'm not really a PHP guy, so I don't understand how to use pagination.php or pagenavigation.php! Do I have to customize one of them to have my nav-bar? What I have to do to get that horizontal nav-bar? Really thanks in advance. Wassim

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• Prefuse: Reloading of XML files

  - by John

  Hello all, I am a new to the prefuse visualization toolkit and have a couple of general questions. For my purpose, I would like to perform an initial visualization using prefuse (graphview / graphml). Once rendered, upon a user click of a node, I would like to completely reload a new xml file for a new visualization. I want to do this in order to allow me to "pre-package" graphs for display. For example. If I search for Ted. I would like to have an xml file relating to Ted load and render a display. Now in the display I see that Ted has nodes associated called Bill and Joe. When I click Joe, I would like to clear the display and load an xml file associated with Joe. And so on. I have looked into loading one very large xml file containing all node and node relationship info and allowing prefuse to handle this using the hops from one level to another. However, eventually I am sure that system performance issues will arise due to the size of data. Thanks in advance for any help, John

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• Ruby or Rails reporting tools?

  - by Anushank

  I am looking for a report generation tool in ruby or rails which allows the user to define a template, then fetch data into the created template. I have been looking through "The Ruby Box: reporting section." There are two reporting tools I have looked at: Thin Reports: It is really good. You can create your own report template with the template editor. Then you can produce PDF reports using thinreports gems. ODF Report: You can create a template ODF file using Open Office and MS Word, and you can use that template to generate the report. Both of these solutions lack the ability to draw charts. Does anyone know of similar reporting tools that can draw charts within a given report? I have tried the RTF Ruby Library. It works, but shares the limitation that it cannot draw charts and graphs. The minimum requirements are: Able to create customizable templates. (e.g. design layout, set font size, color, embed images etc.) Able to draw tables and charts. Template could be in Docx or excel or xml or any other common file format. Report output report must be in Docx or RTF format. Thanks

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• How do people know so much about programming?

  - by Luciano

  I see people in this forums with a lot of points, so I assume they know about a lot of different programming stuff. When I was young I knew about basic (commodore) and the turbo pascal (pc). Then in college I learnt about C, memory management, x86 set, loop invariants, graphs, db query optimization, oop, functional, lambda calculus, prolog, concurrency, polymorphism, newton method, simplex, backtracking, dynamic programming, heuristics, np completeness, LR, LALR, neural networks, static & dynamic typing, turing, godel, and more in between. Then in industry I started with Java several years ago and learnt about it, and its variety of frameworks, and also design patterns, architecture patterns, web development, server development, mobile development, tdd, bdd, uml, use cases, bug trackers, process management, people management if you are a tech lead, profiling, security concerns, etc. I started to forget what I learnt in college... And then there is the stuff I don't know yet, like python, .net, perl, JVM stuff like groovy or scala.. Of course Google is a must for rapid documentation access to know if a problem has been solved already and how, and to keep informed about new stuff by blogs and places like this one. It's just too much or I just have a bad memory.. how do you guys manage it?

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