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• Scala: how to specify varargs as type?

  - by IttayD

  Instead of def foo(configuration: (String, String)*) I'd like to be able to write: type Configuration = (String, String)* def foo(configuration: Configuration) The main use case is to provide an easy method signature when overriding in subclasses

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• Is it possible to symbolically reference a Perl CORE module?

  - by Blaise Roth

  I know I could easily do something like sub sin { sin($_[0]); } and symbolically reference that for every function I need to symb ref, but I'd just like to know if there's a way to do something like {$foo}(123); vs. &{$foo}(123); which works, but not for core functions. Thanks.

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• Extract URLs from text using Ruby while handling matched parens

  - by Horace Loeb

  URI.extract claims to do this, but it doesn't handle matched parens: >> URI.extract("text here (http://foo.example.org/bla) and here") => ["http://foo.example.org/bla)"] What's the best way to extract URLs from text without breaking parenthesized URLs (which users like to use)?

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• Brackets or no brackets for one-line statements ?

  - by Danvil

  What do you prefer? if(condition1) foo(); or if(condition1) { foo(); } Same for the for loop or other...

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• Hooking entity creation in SQLAlchemy

  - by Dan Ellis

  I want to write a SessionExtension that fires a 'Foo-created' event or 'Bar-created' event every time a new Foo or new Bar is committed to the database. However, once inside the after_commit method, I don't know where to find which entities have been committed. Where do I get this information?

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• Validate number of nested attributes

  - by Damien MATHIEU

  Hello, I have a model with nested attributes : class Foo < ActiveRecord::Base has_many :bar accepts_nested_attributes_for :bar end It works fine. However I'd want to be sure that for every Foo, I have at least two Bar. I can't access the bar_attributes in my validations so it seems I can't validate it. Is there any clean way to do so ?

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• How does Symfony pass members set in an action to a template?

  - by Martin Chatterton

  How does a member set inside an action... $this->foo = 'bar'; ...become a variable accessible from a template... echo $foo; // bar I would like to know how it is achieved at a framework level. There is a lot of documentation on how to use Symfony, but I've not managed to find much about how it all fits together behind the scenes (class structure/inheritance etc). Thanks in advance for your help!

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• What's behind the 'system' function in perl?

  - by JohnJohnGa

  i can thought that it will open a shell, execute the parameter (shell command) and return the result in a scalar. But, execute 'system' function in a perl script is faster than a shell command. It will call this command in C? If yes, what's the difference between rmdir foo and system('rmdir foo'); Thanks,

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• Java URI.resolve

  - by twip

  I'm trying to resolve two URIs, but it's not as straightforward as I'd like it to be. URI a = new URI("http://www.foo.com"); URI b = new URI("bar.html"); The trouble is that a.resolve(b).toString() is now "http://www.foo.combar.html". How can I get away with that?

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• emacs: Is it possible to match strings with balanced parens with emacs regex?

  - by Cheeso

  Something like this: http://perl.plover.com/yak/regex/samples/slide083.html In other words I want to match successfully on { { foo } { bar} } but not on { { foo } . I see it's possible in perl, and in .NET. Is it possible in emacs regex?

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• How to define type member constant in F# ?

  - by zproxy

  In C# one can define a type member constant like this: class Foo { public const int Bar = 600; } The IL shall looks like this. .field public static literal int32 Bar = int32(600) How can I do the same within Visual F# / FSharp? I tried this to no avail: [<Sealed>] type Foo() = [<Literal>] let Bar = 600

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• Is it faster to construct jQuery objects using method syntax or pure html?

  - by Evan Carroll

  Using jQuery what provides for faster object construction: With the HTML code $('<dd class="foo baz" id="bar"> foobar </dd>') Or with the pure object/method variant $('</dd>').addClass('foo').addClass('baz').id('bar').text('foobar') I'm not sure how the internals work, feel free to supply a high level summary.

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• recursive directory svn move shell script

  - by yaya3

  I want to rename all nested directories named "foo" to "bar" - I've tried the following with no joy: find */ -name 'foo' | xargs svn move {} 'bar' \; Thanks

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• Could a derived-class object treated as if it's the same type of a bases class? <noobieQ/>

  - by M4design

  Say I got: class X_ { public: void do() { } } class Y_ : public X_ { } And I have this function: void foo(X_ whatever) { whatever.do(); } Can I send a "Y_" object to the foo function, would this work? I just realized that I could have tested this myself :)

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• Multidimensional each

  - by c00lryguy

  How would I do something like below? [ 'foo' ['bar', 'baz'], [ 'one', ['two', 'three'] ] ].each { |word| puts word } # I want this to return: foo bar baz one two three

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• How does Dropbox use Python on Windows and OS X?

  - by robotshapes

  In Windows the Dropbox client uses python25.dll and the MS C runtime libraries (msvcp71.dll, etc). On OS X the Python code is compiled bytecode (pyc). My guess is they are using a common library they have written then just have to use different hooks for the different platforms. What method of development is this? It clearly isn't IronPython or PyObjC. This paradigm is so appealing to me, but my CS foo and Google foo are failing me.

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• Multi-threaded Application with Readonly Properties

  - by Shiftbit

  Should my multithreaded application with read only properties require locking? Since nothing is being written I assume there is no need for locks, but I would like to make sure. Would the answer to this question be language agnostic? Without Lock: Private m_strFoo as new String = "Foo" Public ReadOnly Property Foo() As String Get return m_strFoo.copy() End Get End Property With Lock: Private m_strBar as new String = "Bar" Public ReadOnly Property Bar() As String Get SyncLock (me) return m_strBar.copy() End Synclock End Get End Property

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• In Javascript, if there is an object with a lot of properties that can functions, how do you convert

  - by Jian Lin

  In Javascript, if an object has lots of properties that are functions: var obj = { foo: function() { ... }, bar: function() { ... }, ... } then how can you get an array of names of those functions? That is, an array ["foo", "bar", ... ] thanks.

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• XML: remove child node of a node

  - by nebenmir

  I want to find all nodes in a xml file that have a certain tag-name, lets say "foo". If those foo-tags have them thelves child nodes with node-name "bar", then I want to remove those nodes. The result should be written to a file. // remove this one // don't remove this one Thanx for any hints. As the tag indicates, I would like to do this with python.

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• FileInfo.MoveTo() vs File.Move()

  - by Eric

  Is there any difference between these two methods of moving a file? System.IO.FileInfo f = new System.IO.FileInfo(@"c:\foo.txt"); f.MoveTo(@"c:\bar.txt"); //vs System.IO.File.Move(@"c:\foo.txt", @"c:\bar.txt");

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• Calling and consuming a JBoss Web Service from JavaScript (AJAX)

  - by Andreas Grech

  I am fiddling around with JBOSS's Web Services, and I have created the following: http://127.0.0.1:8080/IM/TestService?wsdl Now I need to access Web Methods from that Web Service from JavaScript. Say I have a web method named foo in TestService, how do I make an ajax call to it? I tried accessing the method via http://127.0.0.1:8080/IM/TestService/foo, but I'm getting an HTTP Status 404.

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• bash "map" equivalent: run command on each file

  - by Claudiu

  I often have a command that processes one file, and I want to run it on every file in a directory. Is there any built-in way to do this? For example, say I have a program data which outputs an important number about a file: ./data foo 137 ./data bar 42 I want to run it on every file in the directory in some manner like this: map data `ls *` ls * | map data to yield output like this: foo: 137 bar: 42

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• Detecting Handlers of a jQuery "Live" Event

  - by Anderson De Andrade

  Using: $('#foo').data('events').click We are able to access an iterative object of click handlers added to the element '#foo' but only when they were added with .bind() Is there a way to get the handlers for an event added with .live()? Is there any other way to know if an element has a click handler assigned?

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• Load a Lua script into a table named after filename

  - by Homeliss

  I load scripts using luaL_loadfile and then lua_pcall from my game, and was wondering if instead of loading them into the global table, I could load them into a table named after their filename? For example: I have I file called "Foo.lua", which contains this: function DoSomething() --something end After loading it I want to be able to access it like: Foo.DoSomething() Thanks!

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• Get Const / Static Name from Function / Method Call.

  - by Mark Tomlin

  I want to find the token's name passed by augment into a function. class Norm { const STR_NORM = 0; const INT_NORM = 0; } function foo($Arg1, $Arg2 = NULL) { getConstName($Arg1); # Should Return STR_NORM; return $Arg1, $Arg2; } echo foo(Norm::STR_NORM); Is there any way to impalement getConstName via the PHP Reflection API?

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