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  • rails howto use environment constant in models and views?

    - by fenec
    i have my constants initialized in environment.rb like this : Rails::Initializer.run do |config| ... MAX_BID = 10 end i would like to use this constant in my models and views,what is the correct syntax? if a use it a model its says NameError: uninitialized constant User::MAX_BID i understand that it is looking for the constant inside the model , how can i tell explicitly that this constant is in the environment? thanks

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  • What programming languages are good for statistics?

    - by Jason Baker
    I'm doing a bit more statistical analysis on some things lately, and I'm curious if there are any programming languages that are particularly good for this purpose. I know about R, but I'd kind of prefer something a bit more general-purpose (or is R pretty general-purpose?). What suggestions do you guys have? Are there any languages out there whose syntax/semantics are particularly oriented towards this? Or are there any languages that have exceptionally good libraries?

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  • Apache installation in folder with chinese characters in name

    - by Zsolti
    I would like to install an Apache server into a folder like c:\anything\???\anything2\ under windows. When I try to start the service it sais that: httpd: Syntax error on line xx of C:/anything/\xe6\x80\x98\xe6\x80\x99\e6\80\9a/anything2/apache/conf/httpd.conf: ServerRoot must be a valid directory Does anyone have a solution?

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  • Drawing Directed Acyclic Graphs: Using DAG property to improve layout/edge routing?

    - by Robert Fraser
    Hi, Laying out the verticies in a DAG in a tree form (i.e. verticies with no in-edges on top, verticies dependent only on those on the next level, etc.) is rather simple. However, is there a simple algorithm to do this that minimizes edge crossing? (For some graphs, it may be impossible to completely eliminate edge crossing.) A picture says a thousand words, so is there an algorithm that would suggest: instead of:

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  • child objects in rdlc (Studio 2010RC)

    - by Jim
    Hi, I am attempting to reference a sub-object in a field expression in a studio 2010 report. This used to work in prior versions. When account references another object with properties the following used to work. =Fields!Account.Value.Name (Name is a property of the child object, Account is the parent object) The same expression syntax no longer works. How do I reference the properties of a sub-object in reporting services in an rdlc in studio 2010. Thanks

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  • Move your Working Copy

    - by coffeeaddict
    I tried to find out how to move my working copy. I know SVN move can be used to move files and folders inside your working copy but what about the working copy itself? I want to move it because I created a branch in a folder location that's different from my branch and had updated therefore all my .NET project references. So when I go to merge back to the mainline trunk I get a bunch of tree conflicts.

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  • Drupal 7 Install Error

    - by Matthew
    Guys, I was hoping that someone can shed some light on why I am getting this error: Parse error: syntax error, unexpected '{' in /homepages/22/d223624283/htdocs/drupal_new/includes/install.core.inc on line 74 Could it be something that I missed as far as D& configurations? Thanks, Matt

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  • Why would you avoid C++ keywords in Java?

    - by Joshua Swink
    A popular editor uses highlighting to help programmers avoid using C++ keywords in Java. The following words are displayed using the same colors as a syntax error: auto delete extern friend inline redeclared register signed sizeof struct template typedef union unsigned operator Why would this be considered important?

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  • PHP array_search nor working?

    - by FFish
    What am I doing wrong here? $array = array('sky'=>'blue', 'grass'=>'green', 'sun'=>'yellow'); $key = array_search('green', $array); echo $key; error: Parse error: syntax error, unexpected T_DOUBLE_ARROW in /Applications/XAMPP/xamppfiles/htdocs/search-array.php on line 2

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  • Why cast null before checking if object is equal to null?

    - by jacerhea
    I was looking through the "Domain Oriented N-Layered .NET 4.0 Sample App" project and ran across some code that I do not understand. In this project they often use syntax like the following to check arguments for null: public GenericRepository(IQueryableContext context,ITraceManager traceManager) { if (context == (IQueryableContext)null) throw new ArgumentNullException("context", Resources.Messages.exception_ContainerCannotBeNull); Why would you cast null to the type of the object you are checking for null?

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  • Java: JButton actionListener explantation

    - by MrDoctorProfessorTyler
    I am extremely confused as to how a JButton works. I have read over the oracle documents of the JButton, but I have failed to see how a JButton can have an actionlistener added to it. I have really always wondered how things like JFrames and all that can have things like .addMouseListener and all that. Can anyone explain how a JButton can have an actionListener added to it like the .addActionListener(...) syntax?

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  • action script dynamic type?

    - by Bin Chen
    I am curious about code in my action script project: public var _p:Object ... in a function: public function WObject(pp:MovieClip) { _p = pp; _p.Play(); } The Play() function is in MovieClip but not Object, can action script allow such syntax?

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  • drupal rules module - add fields to email

    - by bert
    I am looking for the syntax to add node fields to the body of an email. Examples I looked at indicate the the format is: [content_type:content_type_title] However my email arrives with just the string : [content_type:content_type_title] Even better would be a PHP snippet that loads the node and dumps filed title and filed value into the body of the message.

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  • Unable to save file in python

    - by some1
    Trying to save files in python: g = open('~/ccna_pages/'+filename, 'w') g.write(page) g.close() Get this error: Traceback (most recent call last): File "dl-pages.py", line 50, in g = open('~/ccna_pages/'+filename, 'w') IOError: [Errno 2] No such file or directory: '~/ccna_pages/1.0.1.1.html' However, the directory does exist at that location. This syntax seems to be the what the python docs recommend.. http://docs.python.org/release/1.5/tut/node46.html What am I missing? Thanks..

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  • case insensitive for sql LIKE wildcard statement

    - by David Morrow
    sorry if this is a repeat, i looked around some and didnt find what i was after so here goes SELECT * FROM trees WHERE trees.`title` LIKE '%elm%' this works fine, but not if the tree is named Elm or ELM ect... how do i make sql case insensitive for this wild-card search? again apologies if this is repeated. oh, using MySql 5 on apache

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  • Hash Table v/s STL map in C++

    - by anon
    Hi, I am trying to learn C++ maps. Was just wondering about the implementation of STL map. I read it employs Binary search tree. Is there a implementation of hash table in STL? How exactly do STL map stores Key Value pairs?

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  • OQL - Find certain (sub)-members of a given object

    - by Pentius
    I'm analyzing heap dumps in a Portal App. With the help of OQL I found the MemorySessionData Object with its address. Now I want to find all SerializableViewState Objects, that are hold by Objects hold by this MemorySessionData object. In other words: My MemorySessionData Object holds several objects, these hold objects again and so on... I want to find all SerializableViewState Objects in this tree. How would the OQL look like? :-/

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