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• Replacing xcode with macports software

  - by Feynman

  I have been trying to replace everything in xcode with stuff I can get from macports. So far, I installed xcode, then macports, then used macports to install gcc, gcc_select, gmake, elf-bintools, bintools, arm-bintools (just to be sure I replaced all the bintools), and then uninstalled all of xcode. I then linked /usr/bin/make with /opt/local/bin/gmake and used gcc_select to select gcc44--the one from macports. I also exported all the bintool executable paths into the .profile path. I was sure this would work (although I should have known better after working on it for 48 hours straight), but nothing will configure, and the log files all have the common error: :info:configure configure: error: C compiler cannot create executables I have a feeling it has something to do with libraries, but I am really not sure. I use a mac 10.5.8. If this is truely 'impossible', what parts of xcode to I need for macports to work? For example, I can uninstall the xcode folder without a problem.

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• R and SPSS difference

  - by sfactor

  i will be analysing vast amount of network traffic related data shortly. i will pre-process the data in order to analyse it. i have found that R and SPSS are among the most popular tools for statistical analysis. i will also be generating quite a lot of graphs and charts. so i was wondering what is the basic difference between these two softwares. i am not asking which one is better. i just wanted to know what are the difference in terms of workflow between the two besides the fact that SPSS has a GUI. I will be mostly working with scripts in either case anyway so i wanted to know about the other differences.

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• What is a good motivating example for dataflow concurrency?

  - by Alex Miller

  I understand the basics of dataflow programming and have encountered it a bit in Clojure APIs, talks from Jonas Boner, GPars in Groovy, etc. I know it's prevalent in languages like Io (although I have not studied Io). What I am missing is a compelling reason to care about dataflow as a paradigm when building a concurrent program. Why would I use a dataflow model instead of a mutable state+threads+locks model (common in Java, C++, etc) or an actor model (common in Erlang or Scala) or something else? In particular, while I know of library support in the languages above (and Scala and Ruby), I don't know of a single program or library that is a poster child user of this model. Who is using it? Why do they find it better than the other models I mentioned?

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• Comments in Activity Stream

  - by fesja

  Hi, I'm starting to develop an activity stream. I've read both How to implement the activity stream in a social network and What’s the best manner of implementing a social activity stream?. What I haven't found is the best way to add comments to the activities. As in facebook, each comment can be commented by another person. If each activity comment is saved as another activity, then I would not be able to get the activity of that comment without doing a query. So the solution I'm thinking is to save the comments inside the serialize data field of each activity. If the user wants to delete his comment, I would have to update that activity. Is this the correct solution? Is there a better approach? Thanks!

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• Cookies with urllib

  - by CMC

  This will probably seem like a really simple question, and I am quite confused as to why this is so difficult for me. I would like to write a function that takes three inputs: [url, data, cookies] that will use urllib (not urllib2) to get the contents of the requested url. I figured it'd be simple, so I wrote the following: def fetch(url, data = None, cookies = None): if isinstance(data, dict): data = urllib.urlencode(data) if isinstance(cookies, dict): # TODO: find a better way to do this cookies = "; ".join([str(key) + "=" + str(cookies[key]) for key in cookies]) opener = urllib.FancyURLopener() opener.addheader("Cookie", cookies) obj = opener.open(url, data) result = obj.read() obj.close() return result This doesn't work, as far as I can tell (can anyone confirm that?) and I'm stumped.

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• Edit Html.ActionLink output string

  - by Aaron Salazar

  I'm trying to output the following HTML using Html.ActionLink: <a href="/About" class="read-more">Read More<span class="arrow">?</span></a> I'm getting it done by doing an ActionLink, which outputs an tag and then manipulating the string. <%= Html.ActionLink("[[replace]]", "Index", "About", null, new { @class = "read-more" }).ToHtmlString().Replace("[[replace]]", "Read More" + "<span class='arrow'>?</span>")%></p> It'd be good if I could put HTML directly into the ActionLink but there doesn't seem to be a way based on my internet searches. Sure, it works but it seems like a hack. Is there a better way to accomplish this?

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• "isnotnan" functionality in numpy, can this be more pythonic?

  - by Dragan Chupacabrovic

  Hello Everybody, I need a function that returns non-NaN values from an array. Currently I am doing it this way: >>> a = np.array([np.nan, 1, 2]) >>> a array([ NaN, 1., 2.]) >>> np.invert(np.isnan(a)) array([False, True, True], dtype=bool) >>> a[np.invert(np.isnan(a))] array([ 1., 2.]) Python: 2.6.4 numpy: 1.3.0 Please share if you know a better way, Thank you

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• Taking learning into account in a development process

  - by Thiago

  How to deal with the fact that you don't know the language/framework in a development process? For instance, suppose a group of Java developers are about to start a .NET project, they don't know the platform well and might end up finding solutions that the framework already solves or solves better. The sort of questions I have are: which are the best practices in this case? Is RTFM before going on a good pratice? When should one stop RTFM and start asking/searching/playing? Is not RTFM and just searching/asking/playing a good practice? What about estimatives? I'd like to hear from your experience :-)

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• feof() in C file handling

  - by Neeraj

  I am reading a binary file byte-by-byte,i need determine that whether or not eof has reached. feof() doesn't works as "eof is set only when a read request for non-existent byte is made". So, I can have my custom check_eof like: if ( fread(&byte,sizeof(byte),1,fp) != 1) { if(feof()) return true; } return false; But the problem is, in case when eof is not reached, my file pointer is moved a byte ahead. So a solution might be to use ftell() and then fseek() to get it to correct position. Another solution might be to buffer the byte ahead in some temporary storage. Any better solutions?

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• Rendering to a single Bitmap object from multiple threads

  - by Lee Treveil

  What im doing is rendering a number of bitmaps to a single bitmap. There could be hundreds of images and the bitmap being rendered to could be over 1000x1000 pixels. Im hoping to speed up this process by using multiple threads but since the Bitmap object is not thread-safe it cant be rendered to directly concurrently. What im thinking is to split the large bitmap into sections per cpu, render them separately then join them back together at the end. I haven't done this yet incase you guys/girls have any better suggestions. Any ideas? Thanks

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• Displaying images in a console application?!

  - by Stefan Kendall

  I have a console application which screen scrapes some data, and now I need to do image comparisons. If the images are different, I want to show the images to the user. What's the best way to display two images during the execution of a console application? I'm assuming I would use some sort of inter-process communication to send information back and forth, but I'm not sure how exactly I would go about doing that in a good fashion. Also, I'd rather NOT store the images to files if possible. There's no reason to persist the data, and if the console application terminates unexpectedly, it's better if I don't have any dirt left on the file system. Does anyone have any thoughts on how best to accomplish this?

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• Multiple outliers for two variable linear regression

  - by Dave Jarvis

  Problem Building on my previous question, the "extreme" outliers in the following graph are somewhat obvious: Question Given: T - Set of all temperatures Y - Set of all years ST - Sum of temperatures. SY - Sum of years. N - Number of elements T(n) - Temperature of the nth element in the temperature set How would you implement an efficient MySQL stored procedure or user-defined function (UDF) to determine if T(n) is an outlier? (If such an implementation already exists, that would be good to know as well.) Related Sites I am slowly working through these sites to get a better understanding of the problem: Multiple Outliers Detection Procedures in Linear Regression M-estimator Measure of Surprise for Outlier Detection Ordinary Least Squares Linear Regression Many thanks!

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• wsimport and Android or any other ProxyGenerator for android?

  - by Shoaib Shaikh

  I am currently developing an Android app i previously developed for IPhone. My Backend is built using WCF service with basichttpEndpoint, i also enabled RESTful methods for better support with other Mobile platforms as well. Now i want to access my existing WCF service(SOAP/REST endpoint) on Android but i need some good ProxyGenerator to consume my services. I just google around for some solution and i found wsimport and wsdl2java(Axis) are two options in java domain. But i am still unable to find any solution related to Android. Can anyone suggest me the best practice in such scenario?

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• Are jQuery and GWT comparable frameworks?

  - by lomaxx

  At work there's a bit of discussion around what client side framework we should use for our front end web applications. Currently it's a showdown between GWT and jQuery and I'm kind of on the fence but leaning towards jQuery. From what I can tell, GWT and jQuery are trying to solve different problems but are compared to each other because they both end up existing in the web applications space. I suspect that if this is the case, then comparing the two may be fruitless so what I'm trying to get my head around is if comparing jQuery to GWT is even an apples to apples comparison in the same way that jQuery and ExtJS can be compared, or would it be more beneficial for our team to ask certain questions of our application and use the answers to determine which framework is a better fit for us?

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• Mouse interaction in ListBoxItem children (WPF)

  - by absence

  I have a ListBox with an ItemTemplate that contains a control that interacts with the mouse. This interfers with the selection functionality of the ListBox, i.e. clicking a control does not select the item. This is because ListBoxItem sets the Handled property of the mouse event to true in OnMouseLeftButtonDown. I tried the following protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e) { base.OnMouseLeftButtonDown(e); e.Handled = false; } but the ListBoxItem “takes over” the mouse and prevents the control from doing its own interaction. Then I had another idea protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e) { base.OnMouseLeftButtonDown(e); ((ListBoxItem)VisualTreeHelper.GetParent(VisualTreeHelper.GetParent(VisualTreeHelper.GetParent(this)))).IsSelected = true; } which actually works, but feels more like an ugly kludge than an elegant solution. Are there any better solutions that don't rely on the exact contents of the visual tree?

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• Using key().id() on GAE Datastore and reverse geocoding

  - by Ivan Slaughter

  I have 6000 data of district, subdistrict. I need to represent this on dependent dropdown. The datamodel is for example; class Location(db.Model): location_name = db.StringProperty() location_parent = db.IntegerProperty() location_parent is reference to key() or id()? Still cannot decide which one is good. When i use key() as reference then using JSON to create jquery dependent drop down. My page loading/query and rendering time the dropdown is quite slow? Can i use key().id() as drop down option value to lighten up the page load? Any better solution for this parent/child reference for the drop down? For example: for the district record/entities the location-parent is null, for sub district record location_name will contain reference to parent district record. Other issue is to reverse geocoding the location to store or display geoPoint (lat,long)? Is google MAP API always find the exact lat,long of specific region boundaries or any error checking for the result?

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• Get correct output from UTF-8 stored in VarChar using Entity Framework or Linq2SQL?

  - by jasonpenny

  Borland StarTeam seems to store its data as UTF-8 encoded data in VarChar fields. I have an ASP.NET MVC site that returns some custom HTML reports using the StarTeam database, and I would like to find a better solution for getting the correct data, for a rewrite with MVC2. I tried a few things with Encoding GetBytes and GetString, but I couldn't get it to work (we use mostly Delphi at work); then I figured out a T-SQL function to return a NVarChar from UTF-8 stored in a VarChar, and created new SQL views which return the data as NVarChar, but it's slow. The actual problem appears like this: “description†instead of “description”, in both SSMS and in a webpage when using Linq2SQL Is there a way to get the proper data out of these fields using Entity Framework or Linq2SQL?

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• How to configure build numbers in Visual Studio to enable dll comparison

  - by jaminto

  Hi Everyone- I am building a C# solution in Visual Studio 2008 that has several projects and project dependencies. I am looking for a way to change dll version numbers ONLY when the code that builds the project changes. I currently use Beyond Compare to compare my locally built version to the production file system. The goal is to ONLY deploy updated dlls. I am using autoincrementing version numbers, and each time you open visual studio and do a build, all dll version numbers increment. The same goes for a full solution rebuild and when a different developer does a build and tries to deploy. Is there a way that i can configure Visual Studio to ONLY increment the build number based on changed file contents? Is there an add in that will do this?It seems a binary comparison of these files will also fail because of the different version numbers within the dlls. Does anyone know of a better tool compare only the contents of dlls?Thanks in advance.

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• PHP replace backslash

  - by Skyfe

  Hi there, Been struggling with replacing a backslash by another symbol such as '.-.' just to indicate the position of backslashes as I could not send a string such as 'C\xampp\etc.' through url as GET variable so I thought I'd first replace the backslashes in that string by another symbol, then send through url, and then replace them back to backslashes in the PHP file that handles it. Though would there be a better way to send such strings through url? Because when I try a script such as: $tmp_name = preg_replace("\", ".-.", $_FILES['uploadfile']['tmp_name']); It turns out into a php error as \ is also used as delimiter.. Could anyone help me out on this? Thanks in advanced! Btw, if I'd be able to send a full array through url, this whole problem would be solved, but I don't think it's possible?

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• HTML5 Cache manifest file itself is not cached, and called at each resource load

  - by Mic

  We have a web app that runs on the iPhone.The manifest file is ok, and the resources(html, css, js) are cached correctly.The page sits in the home screen. The trouble is, when the page loads a resource from the cache, there is as well a GET call to the server to read the Cache Manifest file.The server is configured to send the correct header (max-age=31536000; public, etc...) and caches well all other files except the cache manifest itself. Is this a normal behavior? It looks there is a slight lag, because of that call, for each resource load.Any idea, if these multiple calls can get a status 304 or even better avoided?

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• Ruby on Rails - differentiating plural vs singular resource in a REST API

  - by randombits

  I'm working on building the URLs for my REST API before I begin writing any code. Rails REST magic is fantastic, but I'm slightly bothered the formatting of a URL such as: http://myproject/projects/5 where Project is my resource and 5 is the project_id. I think if a user is looking to retrieve all of their projects, then a respective HTTP GET http://myproject/projects makes sense. However if they're looking to retrieve information on a singular resource, such as a project, then it makes sense to have http://myproject/project/5 vs http://myproject/projects/5. Is it best to avoid this headache, or do some of you share a similar concern and even better - have a working solution?

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• FileReader vs FileInputReader. split vs Pattern

  - by abdeslam

  I'm working with a file with about 2G. I want to read the file line by line to find some specific terms. Whitch class can I better use: FileReader or FileInputStream? And how can I find the specific words efficiently. I'm just using the split() method, but may be can I use the java.util.regex.Pattern class in combination with java.util.regex.Matcher class. So the Questions are: which class can I use: the FileReader or the FileInputStream? can I use the split method or the regex classes Does someone has an answer to this questions? Thans.

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• Datamodel for a MVC learning project

  - by Dofs

  Hi, I am trying to learn Microsoft MVC 2, and have in that case found a small project I wanted to deploy it on. My idea was to simulate a restaurant where you can order a table. Basics: A user can only reserve a full table, so I don't have the trouble of merging people on different tables. A person can order a table for a certain amount of hours. My question was how I could make the data model the smartest way. I thought of just having a my database like this: Table { Id, TableName } Reservations { Id TableId ReservedFrom ReservedTo UserId } User { UserId UserName ... } By doing it this way I would have to program a lot of the logic in e.g. the business layer, to support which tables are occupied at what time, instead of having the data model handle it. Therefore do you guys have a better way to do this?

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• iPhone development: Best method to allow user to chose search scope

  - by Mark Pemburn

  Hi, I'm developing my first iPhone app and want to allow the user to select the scope of their search in a more complex way than the 'scope buttons' permit. The app is related to wines and I want to the user to be able to select the 'color' (Red, White, Blush, etc.) first, and then select the type/varietal within that category. Right now, I'm using the UISearchBar's scope buttons for the colors and tapping the button opens a view with the selection of colors. This is okay except that once the 'Red' button has been selected, I can't select it a second time to change my choice of type (e.g., change from 'Merlot' to 'Syrrah', etc.) If there's a better way to do this, I'm willing to scrap my method and start from scratch. Thanks!

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• Background image for list view still shows white behind text for cells.

  - by MonkeyTroy

  I wanted to put a background image partially visible behind a list view. I created a list view in my nib with an image view behind it and made the list view background 20% opacity. This allows the background image to show thru but my text in the cells show a white background behind and if I create the cells in cellForRowAtIndexPath the cells have a white background too. I am creating and setting the cell textLabel and the detailTextLabel in the cellForRowAtIndexPath event. Not sure how to get rid of that, or if there is a better way to do the background image.

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