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• Dependency Injection: What's wrong with good old-fashioned refactoring?

  - by Chuck

  DI creates an extra layer of abstraction so that if your implementation class ever changes you can simply plug in a different class with the same interface. But why not simply refactor when you want to use a different implementation class? Other languages like Python and Ruby work fine this way. Why not Java?

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• SQL commands generated in Django by running sqlall

  - by k-g-f

  In my Django app, I just ran $ python manage.py sqlall and I see a lot of SQL statements that look like this, when describing FK relationships: ALTER TABLE `app1_model1` ADD CONSTRAINT model2_id_refs_id_728de91f FOREIGN KEY (`model2_id`) REFERENCES `app1_model2` (`id`); Where does "7218de91f" come from? I would like to know because I'd like to manually write SQL statements to accompany models changes in the app so that my db's can be kept up to date.

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• OSCommerce alternatives

  - by defraagh

  Hello, I'm looking to evaluate a few opensource e-commerce solutions. Are there any good alternatives to OSCommerce out there ? I've looked at Thelia and Magento so far, are there any others that are worth looking at ? They should be : Free as in freedom Easy to maintain / extend Coded in PHP or Python (ideally, but I'm open-minded)

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• fastest public web app framework for quick DB apps?

  - by Steve Eisner

  I'd like to pick up a new tech for my toolbox - something for rapid prototyping of web apps. Brief requirements: public access (not hosted on my machine) - like Google's appengine, etc no tricky configuration necessary to build a simple web app host DB access (small storage provided) including some kind of SQLish query language easy front end HTML templating ability to access as a JSON service C# or Java,PHP or Python - or a fun new language to learn is OK free! An example app, very simple: render an AJAXy editable (add/delete/edit/drag) list of rich-data list items via some template language, so I can quickly mock up a UI for a client. ie. I can do most of the work client-side, but need convenient back end to handle the permanent storage. (In fact I suppose it doesn't even need HTML templating if I can directly access a DB via AJAX calls.) I realize this is a bit vague but am wondering if anyone has recommendations. A Rails host might be best for this (but probably not free) or maybe App Engine, or some other choice I'm not aware of? I've been doing everything with heavyweight servers (ASP.NET etc) for so long that I'm just not up on the latest... Thanks - I'll follow up on comments if this isn't clear enough :)

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• How to delete "-" file from svn?

  - by ~brzeti

  Accidentally I have created file "-" (just a minus) in a directory and commited it. I have to delete it because its causing error on other machines: svn: Can't convert string from 'UTF-8' to native encoding: svn: ?\226?\128?\147 I can remove it from local directory using "rm -i *" or with python "os.remove('\xe2\x80\x93')" but those methods do not work with "svn rm". How to delete such file from svn repository?

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• Looking for a script/tool to dump a list of installed features and programs on Windows Server 2008 R

  - by Hamish Grubijan

  Hi, The same compiled .Net / C++ / Com program does different things on two seemingly same computers. Both have DOZENS of things installed on them. I would like to figure out what the difference between the two is by looking at an ASCII diff. Before that I need to "serialize" the list of installed things in a plain readable format - sorted alphabetically + one item per line. A Python script would be ideal, but I also have Perl, PowerShell installed. Thank you.

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• How can I left-justify numerical output in fortran?

  - by mishaF

  I am writing some simple output in fortran, but I want whitespace delimiters. If use the following statement, however: format(A20,ES18.8,A12,ES18.8) I get output like this: p001t0000 3.49141273E+01obsgp_oden 1.00000000E+00 I would prefer this: p001t0000 3.49141273E+01 obsgp_oden 1.00000000E+00 I tried using negative values for width (like in Python) but no dice. So, is there a way to left-justify the numbers? Many thanks in advance!

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• How-to delete indexes in Google App Engine (Java)?

  - by Antonio

  Is there a way to delete unused indexes in Google App Engine Java application? The only one way I was able to find is to create an empty Python GAE application and run the following command: appcfg.py vacuum_indexes /path/to/myapp/ Is there a more intelligent way?

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• opensource websites backend in java

  - by zhangzhong

  Are there any opensource websites backend in java? Just like reddit in python, and openstreet in ruby.

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• How do I delete all entities from my local Google App-engine datastore?

  - by Jason Rikard

  How can I remove all entities or reset the local datastore on my dev_appserver? I accidentally recursively called a function to create an entity when testing. I am using the Google App-engine SDK on Vista with Python.

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• Is it possible to execute binary files in java?

  - by Dimitri

  Hi, I have a list of binaries written in java, ada,C, python and I want to execute them. How to do that ? Is there any JVM binding to those languages ? Thanks for your answers

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• Using NetBeans for multiple programming languages

  - by mawg

  I am looking for a cross platform RAD IDE with GUI building. NetBeans looks right (or am aI wrong?). However, I may want to code somethings in C++ and some in Python. It looks like both are supported, but I am not sure if I need to install two copies of NetBeans or if one can handle both programming languages. Sorry it's such a st00pid n00b question - can anyone tell me quickly? Thanks

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• C++: Chr() and unichr() equivalent?

  - by alex

  I could have sworn I used a chr() function 40 minutes ago but can't find the file. I know it can go up to 256 so I use this: std::string chars = ""; chars += (char) 42; //etc So that's alright, but I really want to access unicode characters. Can I do (w_char) 512? Or maybe something just like the unichr() function in python, I just can't find a way to access any of those characters.

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• Anyone knowns a matplotlib equivalent in C or C++

  - by dtrosset

  I've been using matplotlib in a Python project. It is great. I have now to plot data in a C++ project. Is anyone aware of a plotting library in C or C++? Note that I cannot accept GPL licensed libraries.

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• django convert list of objects to list of primary keys

  - by John

  Hi, As the title says I have a list of Django objects and I want to get a list of primary keys. What is the best way of doing this? I know I could do my_list = [] for item in object_list: my_list.append(item.pk) but was wondering if there is Django or Python specific way of doing this better. Thanks

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• Where is Prolog used for traffic control systems?

  - by Masi

  The user Laurent had an interesting reply to the question [Why hasn’t logic programming caught on?]: If you look at the influence logic-programming has had in the field of -- air traffic control -- I don't think it can be said logic-programming has not caught on. A question arises: Where is prolog used for traffic control systems on the roads? Why is it used instead of languages, such as C or Python, in such environments?

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• In Java, is there a way to write a string literal without having to escape quotes?

  - by Matthew

  Say you have a String literal with a lot of quotation marks inside it. You could escape them all, but it's a pain, and difficult to read. In some languages, you can just do this: foo = '"Hello, World"'; In Java, however, '' is used for chars, so you can't use it for Strings this way. Some languages have syntax to work around this. For example, in python, you can do this: """A pretty "convenient" string""" Does Java have anything similar?

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• question about interface

  - by davit-datuashvili

  i have posted this question http://stackoverflow.com/questions/2874487/how-can-i-implement-this-python-snippet-in-java i have compiled it now i need to use in main project public static void main(String[]args){ } ? can anybody show me example?

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• question about interface

  - by davit-datuashvili

  i have posted this question http://stackoverflow.com/questions/2874487/how-can-i-implement-this-python-snippet-in-java i have compiled it now i need to use in main project public static void main(String[]args){ } ? can anybody show me example?

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• question about interface

  - by davit-datuashvili

  i have posted this question http://stackoverflow.com/questions/2874487/how-can-i-implement-this-python-snippet-in-java i have compiled it now i need to use in main project public static void main(String[]args){ } ? can anybody show me example?

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• Language parsers

  - by prosseek

  I need to parse C#, Ruby and Python source code to generate some reports. I need to get a list of method names inside a class. What parsers for those languages are provided? For C#, I found http://csparser.codeplex.com/Wikipage , but for the others, I found a bunch of parsers using those languages, but not the language parsers of them.

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• Extract IDs from CSS

  - by nosuchip

  I've the CSS file with many entry like id1, #id2, #id3, #id4 { ... } id3, #id2 { ... } id2, #id4 { ... } I want to extract list of unique IDs using command line tools (msys). Unique means any entry in list presented only once. How? PS: I know how doing it using python, but what about awk/sed/cat?

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• How do i store and retrieve a blob from sqlite

  - by acidzombie24

  I have used sqlite in c++, python and now (perhaps) in C#. In all of these i have no idea how to insert a blob into a table. How do i store and retrieve a blob in sqlite?

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• Is it possible to convert number 21 to twentyone?

  - by shekhar

  Hi, Can we convert numbers to their alphabetical equivalents? For example 21 - twenty one 9999 - nine thousand nine hundred ninghty nine If yes, how to do this? Thanks and Regards, EDIT : Any language will do. C#, C++, Java, python.

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• How can I find the user's home dir in a cross platform manner, using C++?

  - by Macha

  How can I find the user's home directory in a cross platform manner in C++? i.e. /home/user in Linux, C:\Users\user\ on Windows Vista, C:\Documents And Settings\user\ on Windows XP, and whatever it is that Macs use. (I think it's /User/user) Basically, what I'm looking for is a C++ way of doing this (example in python) os.path.expanduser("~")

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