wcf .net

Limit MongoDB database size?

2011-02-19T18:08:00.003-08:00

Programmer Question

We're interested in deploying MongoDB, but we need to know if we can limit database/table sizes?

For example:

db.user1.find()
db.user2.find()

As you can see from the above, each user will have their own database. We want to limit each user's database so we don't have any one user eating up all our hard drive space.

Is this possible with MongoDB?

Thanks.

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PHP: include() bug, or user error? (Passed filename in IF statement)

2011-02-19T18:08:00.001-08:00

Programmer Question

Alright so I've already created a PHP bug about this but it was marked as bogus, but I can't help but to believe they didn't read it carefully...

Link to Bug #54042

The error is caused by using an include() statement in an IF statement, making the statement believe it's been passed an empty string.

Reviewing the bug will explain everything, including a test script.

Is it a bug, or am I missing something "feature"-wise? This is weird seeing as how assigning the output of include to a variable and then testing that value works just fine (which would be the workaround).

Any insight?

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Sparse array support in HDF5

2011-02-17T18:08:00.001-08:00

Programmer Question

Hi,

I need to store a 512^3 array on disk in some way and I'm currently using HDF5. Since the array is sparse a lot of disk space gets wasted.

Does HDF5 provide any support for sparse array ?

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Custom Post Types on Category Pages

2011-02-15T18:07:00.001-08:00

Programmer Question

Hi!

I am using this bit of code to make custom post typess show on my category pages:



Is there a way I can modify this code to include it into functions.php instead of category.php and achieve the same effect?


Thanks!


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Does PowerShell have something similar to the Perl abbrev() function
2011-02-13T18:07:00.003-08:00
Programmer Question
 So in Perl, there is a function call abbrev() that given a list of keywords, returns a hash mapping all the minimally abbreviations to their keyword:


@keywords = {"this", "and", "that"}
%AbbevList = abbrev(@keywords);


This would return a Hash like this:


thi => "this"
this => "this"
tha => "that"
that => "that"
a => "and"
an => "and"
and => "and"


In Perl, this allowed me to take user abbreviations for my keywords and easily map them correctly to the "real" keyword as long as the user's input was minimally unique.


Does PowerShell have anything similar?


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How to do this with routing in Rails?
2011-02-13T18:07:00.001-08:00
Programmer Question
 Say we have a simple resource called news:


resources :news


The generated paths are in this form /news/:id. I would like to provide a shortcut for this by dropping the /news/, so that /1/ goes to news#show with id 1 and the same for all the other resourceful actions of news.


I figured it's probably something along the lines of


match '/:id(/:action)', :controller => 'news'


but this isn't working.


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Konntent.com codeigniter htaccess
2011-02-12T18:07:00.003-08:00
Programmer Question
 Please i need help with my application hosted at kontent.com that runs on Codeigniter. I get a No input file specified message and cant get it working


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Enclosure Memory Copies
2011-02-12T18:07:00.001-08:00
Programmer Question
 function myClass()
{
  //lots and lots of vars and code here.

   this.bar = function()
   {
     //do something with the numerous enclosed myClass vars
   }

   this.foo = function()
   {
      alert('Hello'); //don't do anything with the enclosed variables.
   }
}


Each instance of myClass gets its own copy of bar and foo, which is why prototyped methods use less memory. However, I would like to know more about the memory use of inner methods. 


It seems obvious to me that (1) below must be true. Do you agree? 



Not only do distinct myClass instances have their own distinct copies of bar, but they also must have their own distinct copies of the myClass enclosure. (or else how does the bar method keep the myClass variables straight on a per instance basis?)



Now (2) is the question I'm really after.



Since the inner foo method doesn't use anything in the myClass enclosure a natural qustion is: Is javascript smart enough to not keep a myClass enclosure in memory for the use of foo? 



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Horizontal Centering of Multi-Line List Items in Unordered List
2011-02-11T18:08:00.003-08:00
Programmer Question
 I have an unordered list that wraps onto a second line, and needs to be centered horizontally within the containing UL. Each LI is a set width and height. I've seen many approaches that work for a single line, but nothing I've tried is working when the list wraps to a second line. Would be ideal if this worked in IE7+ -- Thanks for the help.


See here for an illustration: http://grab.by/8UIl


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Are there javadoc-like tools to generate RESTful web service apidoc from JAX-RS annotations?
2011-02-11T18:08:00.001-08:00
Programmer Question
 I'm developing a web service with CXF by using JAX-RS annotations on resources. These annotations specify arguments names, default values, and the valid input and output mime types. 


It'd be nice to be able to run a javadoc-esque tool on my code to generate a concise set of documentation of this interface, but I cannot seem to find anything.


The docs produced by javadoc itself would require too much trimming down, I really want something that understands the semantics of the JAX-RS annotations and generates something friendly to the devs who want to use my service.


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Tween animation on a Canvas in a custom View
2011-02-10T18:08:00.001-08:00
Programmer Question
 I have a class that extends View and I draw everything I need inside it's canvas in the onDraw method. Something like this:


protected void onDraw(Canvas canvas) {
        synchronized (this) {
                float h = mHeight;
                float w = mWidth;

                canvas.drawColor(Color.WHITE);

                float roadLine= (85.0f/100.0f)*h;

                canvas.drawBitmap(mTop, 0, roadLine-mTop.getHeight(), null);

                //this is what I'd like to animate
                canvas.drawBitmap(mSmoke);

        }
    }


Now, how do I make an Animation (tween animation) draw in here?


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groovy: use brackets on method calls or not?
2011-02-08T18:08:00.003-08:00
Programmer Question
 hi all,


this is a fairly general question about whether people should be using brackets on method calls that take parameters or not.
i.e.


def someFunc(def p) {
...
}


then calling:


someFunc "abc"


vs...


someFunc("abc")


Is this just a question of consistency, or is there specific use cases for each?


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How do I do to map Value Object in Entity Framwork 4
2011-02-08T18:08:00.001-08:00
Programmer Question
 I want map a value object in Entity Framework 4 as in NHibernate where I use Component-Class(Nested in AR). How do I do this?


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Other ways for zoom-in zoom-out in Android WebView?
2011-02-06T18:08:00.001-08:00
Programmer Question
 My actual task is to have zoom in zoom out for the WebView, but I don't want to scale images.


Are there ways to do that?


10x in advance,
Danail


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Python - efficient representation of pixels and associated values
2011-02-05T18:08:00.003-08:00
Programmer Question
 I'm using python to work with large-ish (approx 2000 x 2000) vectors, where each I, J point in the vector represents a single pixel.


The matrices themselves are sparse (ie a substantial portion of them will have zero values), but when they are updated they tend to be increment operations, to a large number of adjacent pixels in a rectangular 'block', rather than random pixels here or there (a property i do not currently use to my advantage..). 
Afraid a bit new to matrix arithmetic, but I've looked into a number of possible solutions, including the various flavours of scipy sparse matrices. So far co-ordinate (COO) matrices seem to be the most promising. 
So for instance where I want to increment one block shape, I'd have to do something along the lines of:


>>> from scipy import sparse
>>> from numpy import array
>>> I = array([0,0,0,0])
>>> J = array([0,1,2,3])
>>> V = array([1,1,1,1])
>>> incr_matrix = sparse.coo_matrix((V,(I,J)),shape=(100,100))
>>> main_matrix += incr_matrix  #where main_matrix was previously defined


In the future, i'd like to have a richer pixel value representation in anycase (tuples to represent RGB etc), something that numpy array doesnt support out of the box (or perhaps I need to use this). 


Ultimately i'll have a number of these matrices that I would need to do simple arithmitic on, and i'd need the code to be as efficient as possible -- and distributable, so i'd need to be able to persist and exchange these objects in a small-ish representation without substantial penalties. I'm wondering if this is the right way to go, or should I be looking rolling my own structures using dicts etc?


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Classic ASP & XML
2011-02-05T18:08:00.001-08:00
Programmer Question
 I've got the following XML and the below ASP statement is working, but I need to get a specific tag rather than response.write everything. i.e. I want to get "Document_Name", or "Document_Size". 


Does anyone know how I can do this?   



     
         tes1.png
         123
     
     
          Test.png
          123
     



This is the code ..


Set objHdl = objLst.item(i)

Set PropertyImages = ObjHdl.getElementsByTagName("PropertyImages")

for x = 0 to (PropertyImages.Length-1)
    Set Image = PropertyImages.item(x)

    response.write "Image=" & Image.text & "
"
next


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Custom images with UISlider doesn't show on the device.
2011-02-04T18:08:00.001-08:00
Programmer Question
 Everything works on the simulator without a problem. However when I put it on my device it only show the ThumbImage. It is just really strange. I'm thinking this could be a iOS version issue or memory issue. My device is iPhone 3GS iOS 4.1.


@interface BlueChalkSlider : UISlider {}
@end

@implementation BlueChalkSlider
- (id)initWithCoder:(NSCoder *)decoder {
    if ((self = [super initWithCoder: decoder])) {      
        self.backgroundColor = [UIColor clearColor];
        [self setThumbImage:[UIImage imageNamed:@"Chalk.png"] forState:UIControlStateNormal];
        [self setMinimumTrackImage:[UIImage imageNamed:@"ChalklineBlue.png"] forState:UIControlStateNormal];
        [self setMaximumTrackImage:[UIImage imageNamed:@"ChalklineWhite.png"] forState:UIControlStateNormal];
    }
    return self;
}
@end


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caching UIView objects as a way to improve performance
2011-01-30T18:07:00.001-08:00
Programmer Question
 Obviously Apple does this with UITableViewCells.  I am curious if anyone has tried it with other UIView subclasses.  And if so, what was your experience?


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Empty but styled div in 960.gs
2011-01-29T18:08:00.001-08:00
Programmer Question
 I have the following column in my webpage draft, which is based on HTML5 Boilerplate and 960.gs:





However, when I open the page in Chrome, the column doesn't show up at all, unless I put some kind of content in it, like text or whitespace.


How can I make this work without resorting to desperate solutions like &thinsp;?


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[Do Not Validate ] ASP.NET - MVC3 property decoration?
2011-01-29T18:07:00.001-08:00
Programmer Question
 Is there an attribute I can decorate a single property on my model to tell the engine not to include the property in the validation routine?


[DoNotValidate] or [ValidateIgnore]


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Inserting index.phtml view from side controller in the main index.phtml
2011-01-28T18:08:00.003-08:00
Programmer Question
 I have Entry controller with index action that lists all entries, and of course views/scripts/index.phtml. I also have the main page index/index.phtml. How can I include entry/index.phtml in index/index.phtml so I can see the results of entries as part of the structure of the home page?


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Why are my java.util.zip functions showing inconsistent behavior?
2011-01-28T18:08:00.001-08:00
Programmer Question
 I have a Java application that uses the java.util.zip library to compress and decompress files. What I have is a zip file on the server (created by my application) and the client zipping some of his files and uploading the file to the server, but if there's no difference in the underlying files then I don't want to waste the time uploading. I figured that I could calculate the MD5 hash values of the client-side and server-side and see if they're the same, but what's happening is I use my application to decompress a zip file, and then without changing any of the underlying files, I use my application to re-compress it, but the old and new zip files have different MD5 hashes. Does anybody know why this is happening, and if there's a better way to compare two zip files? Thanks.


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Sqlite3 error message
2011-01-24T18:08:00.001-08:00
Programmer Question
 Hey, I've recently been having trouble properly installing my Sqlite3 gem. I've already tried installing sqlite3, followed by sqlite3-ruby and I keep getting an error message. Can anyone tell me what I need to do to correct this? Here's the error message:


demetriuford$ gem install sqlite3-ruby 1.3.3
Building native extensions.  This could take a while...
ERROR:  Error installing sqlite3-ruby:
ERROR: Failed to build gem native extension.

/Users/demetriuford/.rvm/rubies/ruby-1.9.2-head/bin/ruby extconf.rb
checking for sqlite3.h... yes
checking for sqlite3_libversion_number() in -lsqlite3... yes
checking for rb_proc_arity()... yes
checking for sqlite3_initialize()... no
sqlite3-ruby only supports sqlite3 versions 3.6.16+, please upgrade!
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
 --with-opt-dir
 --without-opt-dir
 --with-opt-include
 --without-opt-include=${opt-dir}/include
 --with-opt-lib
 --without-opt-lib=${opt-dir}/lib
 --with-make-prog
 --without-make-prog
 --srcdir=.
 --curdir
 --ruby=/Users/demetriuford/.rvm/rubies/ruby-1.9.2-head/bin/ruby
 --with-sqlite3-dir
 --without-sqlite3-dir
 --with-sqlite3-include
 --without-sqlite3-include=${sqlite3-dir}/include
 --with-sqlite3-lib
 --without-sqlite3-lib=${sqlite3-dir}/lib
 --with-sqlite3lib
 --without-sqlite3lib


Gem files will remain installed in /Users/demetriuford/.rvm/gems/ruby-1.9.2-head/gems/sqlite3-1.3.3 for inspection.
Results logged to /Users/demetriuford/.rvm/gems/ruby-1.9.2-head/gems/sqlite3-1.3.3/ext/sqlite3/gem_make.out
ERROR:  Could not find a valid gem '1.3.3' (>= 0) in any repository


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how copy audio file from iPhone's filesystem to asset library programatically
2011-01-23T18:08:00.003-08:00
Programmer Question
 hi folks,
i have an audio file that i saved from stream into ~/Documents folder on iPhone.
i just wanted to make this file visible to user as (s)he can play it using iPod program or put that file into his/her song's album!
any help appreciated


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how to change the header and footer of PHPBB forum?
2011-01-23T18:08:00.001-08:00
Programmer Question
 Im new to phpbb forum so im struggled to change the header and footer of the phpbb styles.
can any one help me..


Thanks,
Ram


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scp + copy from node1 to node2
2011-01-13T18:07:00.001-08:00
Programmer Question
 I use the scp -rp to copy directory with links


scp -rp dir node1:/root


how to enable scp to copy the links & full path from dir? to  node1:/root


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linq to sql - query to find items without children
2011-01-12T18:07:00.003-08:00
Programmer Question
 hi there,


i am trying to write a linq query that doesn't fire a million child queries.


what i want to do is something like this in sql 


select incoming.id, incoming.message, outgoing.message
from incoming
left join outgoing on incoming.id = outgoing.originalMessageId
where outgoing.message is not null


so basically i am doing the left join just do i can find the objects that don't have children.


is there a way to do this, AND return a typed bunch of the "incoming" items...?


sounds simple, and i've tried a few different approaches but i think i'm suffering from lack of sleep so my brain isn't making it happen :(


thanks in advance 
Doug


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Print "1 followed by googolplex number of zeros"
2011-01-12T18:07:00.001-08:00
Programmer Question
 Assuming we are not concerned about running time of the program (which is practically infinite for human mortals), we want to print out in base 10, the exact value of 10^(googolplex), one digit at a time (mostly zeros).


Describe an algorithm (which can be coded on current day computers), or write a program to do this.
Since we cannot practically check the output, so we will rely on collective opinion on the correctness of the program.


NOTE : I do not know the solution, or whether a solution exists or not. The problem is my own invention. To those readers who think this is not a CS question... kindly reconsider. This is difficult and bit theoretical but definitely CS.


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package import problem in mathematica
2011-01-11T18:07:00.001-08:00
Programmer Question
 In mathematica (I am using mma 5.0 ( guess pretty old)), if I type the following as one line:


Needs["Graphics`Master`"]; Animate[Plot[Sin[n x], {x, 0, 2 Pi}, Axes -> False], {n, 1, 6, 1}]


I then got a lot of errors/warnings. But if I type them in separately, it is working fine. How to make it work in one code block?


Thanks!


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Open source e-commerse solution for a tool catalog based around EAV
2011-01-08T18:08:00.003-08:00
Programmer Question
 I'm looking for an e-commerse system that is built around EAV (entity-attribute-value) somewhat like magento, but hopefully simpler. I'm really okay with just about any platform (Java, .net, php, whatever), I just really need to be able to freely associate properties with groups of products... i.e. a drill bushing will have some inner diameter and outer diameter, a drill bit will have a certain outer diameter, etc. Thanks for the info!


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pygments : width of html code tag
2011-01-08T18:08:00.001-08:00
Programmer Question
 How defining the width of code html create for pygments?


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C++: Defining names in place of "true" and "false" for bool type
2011-01-06T18:07:00.001-08:00
Programmer Question
 I am wanting to use a bool to switch back and forth between loading X and loading Y from a file. I don't want to use "true" and "false", because it doesn't make the code clear. I would rather use something like LOAD_X or LOAD_Y... Is the following code the way to do it? Or is there a better way?


#define LOAD_X true
#define LOAD_Y false


Thanks.


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animate text letters
2011-01-05T18:07:00.003-08:00
Programmer Question
 can you give me a hint how to animate letters in the text string? For example, for a string "Hello World", scale H first from 0 to size, then e, then l etc? like a bouncing text effect if you know what I mean.


And I would live to paint the first letter in a different color.


I do know how to animate the entire view or draw text on canvas, but that way animate the entire text string not the letters.


Thanks for any tips!


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ASP.NET MVC 2.0 NHibernate Configure() issue
2011-01-05T18:07:00.001-08:00
Programmer Question
 Hi Stackoverflow,
I have installed NHibernate for my ASP.NET web app although I'm getting a problem in real-time on the following line of code:


            if (_sessionFactory == null)
            {
                _sessionFactory = new Configuration().Configure().BuildSessionFactory();

            }


Looking at the inner exception the problem is this:


{"Could not find file 'D:\Websites\Test\Test\Test\bin\hibernate.cfg.xml'.":"D:\Websites\Test\Test\Test\bin\hibernate.cfg.xml"}


This makes sense, as the file doesnt exist in that location.  This line of code is within my Core project.  File hibernate.cfg.xml is currently in my Infrastucture project, not my Core.  Should this be?  I have copied the file into this location although I still get problems.  If I manually copy the file into this location within windows explorer I then get the following error during runtime.
{"Could not load file or assembly 'Infrastructure' or one of its dependencies. The system cannot find the file specified.":"Infrastructure"}


Also, I'm missing DynamicProxy.dll as I'm using castle and I couldnt see a version of the DynamicProxy in the castle folder that I downloaded from http://sourceforge.net/projects/nhibernate/


any suggestions?  I can see LinFu.DynamicProxy.dll within the download although it says I only need one of the folders, Linfu or Castle, and I'm using Castle for this experiment.  Not sure if this has anything to do with it, just thought it might help.


any ideas?  Many thanks,
James


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How do I get more insight in what's going wrong with my script?
2011-01-04T18:07:00.003-08:00
Programmer Question
 I have this code:





When I open the script in my browser everything seems fine, I get a blank screen and the error_log is empty. But it doesn't do what it is written for. Do you have any tips how I get get more insight of what is going wrong?


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Lucene.Net: How can I convert MultiFiledQueryParser to BooleanQuery?
2011-01-04T18:07:00.001-08:00
Programmer Question
 This is my current code that does a MultiField Query


       ''# Variables used by Lucene
        Dim reader As IndexReader = IndexReader.Open(luceneDirectory, True)
        Dim searcher As IndexSearcher = New IndexSearcher(reader)
        Dim parser As QueryParser = New MultiFieldQueryParser(Lucene.Net.Util.Version.LUCENE_29,
                                                              New String() {"title",
                                                                            "description",
                                                                            "region",
                                                                            "pricelow",
                                                                            "pricehigh",
                                                                            "url",
                                                                            "user",
                                                                            "location"},
                                                                        New StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29))
        Dim query As Query = parser.Parse(search.ToLower)


        ''# We want to ensure that only relevant dates are being returned.
        Dim nowValue = DateTools.DateToString(DateTime.Now, DateTools.Resolution.DAY)
        Dim dateFilter = If(searchPast, Nothing, FieldCacheRangeFilter.NewStringRange("filterdate",
                                                                                  lowerVal:=nowValue,
                                                                                  includeLower:=True,
                                                                                  upperVal:=Nothing,
                                                                                  includeUpper:=False))


''#============================================================================
''# Here's where I also need to add a regionFilter where I have something like

''# Dim regionFilter = New FieldCacheTermsFilter("region", New String() {HttpContext.Current.Request.Url.Subdomain})

''# This is because we must always ONLY ever return search results that are from
''# HttpContext.Current.Request.Url.Subdomain (where Subdomain is an extension 
''# method that returns the name of the region... much like Kijiji.ca)
''#============================================================================

        Dim topDocs As TopDocs = searcher.Search(query, dateFilter, 1000)


I'm just not sure how to go about doing this.  How can I change it up so that I can do a boolean query and include a second filter?


Note: I still need to be able to search on fields like



  user:username

  location:germany

  etc



I tried a strictly boolean query before and I could not use the above search terms. Not sure where I went wrong.


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A logical question
2011-01-03T18:08:00.001-08:00
Programmer Question
 I'm working on a research problem out of curiosity and I don't know how to program the logic that I've in mind. Let me explain it to you :


I've 4 vectors say for example,


v1 = 1 1 1 1
v2 = 2 2 2 2
v3 = 3 3 3 3
v4 = 4 4 4 4


Now what I want to do is to add them combination-wise. i.e


v12 = v1+v2
v13 = v1+v3
v14 = v1+v4
v23 = v2+v3
v24 = v2+v4
v34 = v3+v4


Till this step it is just fine. The problem is now I want to add each of these vectors one vector from v1,v2,v3,v4 which it hasn't added before. For example


v3 and v4 hasn't been added to v12 so I want to create v123 and v124. similarly for all the vectors like,


v12 should become :
v123 = v12+v3
v124 = v12+v4

v13 should become :
v132 // this should not occur because I already have v123
v134

v14 should become :
v142 // cannot occur because I've v124 already
v143 // cannot occur

v231 // cannot occur
v234 ... and so on.


It is important that I do not do all at one step at the start like for example I can do (4 choose 3) 4C3 and finish it off but I want to do it step by step at each iteration.


Can anybody have any idea how to program this ? 


P.S. I'm trying to work on an modified version of apriori algorithm in Databases. I selected C++ and vector tags because I'm trying to do this in C++.


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If I say calloc(1000, 23), does the 23 "round up" to 24? Or to 32?
2011-01-03T18:07:00.001-08:00
Programmer Question
 Hi,


I was wondering, do most implementations of calloc treat the size as an alignment too, and round it up to the next supported granularity?


If so, then do they round up to the next power of 2, or do they round to the next multiple of 8 or 16?


If calloc keeps the parameter the same, then how does that even work? Wouldn't your data then be unaligned?


Thank you!


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porting an iOS app to mac -- how to handle memory management?
2011-01-02T18:08:00.003-08:00
Programmer Question
 My code has all the retain/release calls in it of course . . . is it likely to be easier to write the mac app with garbage collection (and then what do I do about the retains/releases) or without?


Whichever way you recommend, any pointers about relevant Xcode settings would be helpful.  Thanks.


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JMS for JCA Inbound Messaging ?
2011-01-02T18:08:00.001-08:00
Programmer Question
 I am implementing JCA Inbound model so I am studying available reference implementations that I found from Google. 


So far I managed to find 2 sample implementations and in both implementation, for inbound messages, they just define a simple MessageListener interface and directly call onMessage method on it. 


So I'd like to know if there is any pros/cons to use JMS instead of user defined MessageListener. 


Thanks in advance.


Regards,


Kyi Hein


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What are the main differences between C++, D and C++0x?
2011-01-01T18:08:00.003-08:00
Programmer Question
 We all encounter and hear them more often lately and i'd like some good comparison between them right here on stackoverflow. Links, references and articles are fine also.


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How do I add get an application to load on start-up.
2011-01-01T18:08:00.001-08:00
Programmer Question
 My Cocoa program needs to add an application to the start-up menu on a Mac. 


Please let me know of any Cocoa code samples for doing this.


Any help will be greatly appreciated.


Thanks,
Anisha


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UIButton label text is being clipped
2011-01-01T16:00:00.003-08:00
Programmer Question
 I have a UIButton built in Interface Builder that has a default label. In Xcode, I'm changing the label text dynamically like so:


myButton.titleLabel.text = @"this is the new label";


However, when the text updates, the new string is being clipped down to the same size as the original string and ends up looking like:


this...label


Anyone know why this is happening?


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tokenizing a string with unequal number of spaces between words.
2011-01-01T16:00:00.001-08:00
Programmer Question
 I am tryint to tokenize entries from a file. However I am not able to use the line.split("") option because of unequal number of spaces between files. I am copying a few lines from my file below:


"08-09-2010 21:21:46      00:22:7f:a6:9b:69                                 -79"
"08-09-2010 21:21:46      04:4f:aa:b4:49:49                                 -79"
"08-09-2010 21:21:46      04:4f:aa:31:4e:59   tikona 18002090044            -83"
"08-09-2010 21:21:46      00:22:7f:26:9b:69   tikona 18002090044            -74"
"08-09-2010 21:21:46      04:4f:aa:34:0d:c9   tikona 18002090044            -82"
"08-09-2010 21:21:46      04:4f:aa:71:4e:59                                 -85"
"08-09-2010 21:21:46      04:4f:aa:34:21:89   tikona 18002090044            -75"
"08-09-2010 21:21:46      04:4f:aa:34:49:49   tikona 18002090044            -77"
"08-09-2010 21:21:46      04:4f:aa:74:0d:c9                                 -85"
"08-09-2010 21:22:47      18 APs were seen
"


I need to access the first column (which is a datetime object) the second column (00:22....) and the last column (-79 etc). I have no trouble accessing the first and second columns, but not the last column. When I do a info=line.spilt(""), since the third column might or might no entries, I am not able to determine the token number. 


How do i access the 4th column? Is there a way i can use info[i].contains(" -")?


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PHP create an array from the values of another arrays key?
2010-12-28T18:08:00.003-08:00
Programmer Question
 PHP create an array ($arr2) from the values of another arrays ($arr1) key (name)?


I have an array as follows:


$arr1 = array(0 => array('name' => 'tom', 'age' => 22), 1 => array('name' => 'nick', 'age' => 18));


However I want to create an array from it which consists of all the names, so it would become:


$arr2 = array('tom', 'nick');


I've looked at array_filter(), but that would'nt work as this is a multi-dimensional array?


All help is appreciated :)


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Value gets changed upon comiting. | CallableStatements
2010-12-28T18:08:00.001-08:00
Programmer Question
 Hello, I having a weird problem with a DAO class and a StoredProcedure, what is happening is that I use a CallableStatement object which takes 15 IN parameters, the value of the field id_color is retrieved correctly from the HTML forms it even is set up how it should in the CallableStatement setter methods, but the moment it is sent to the database the id_color is overwriten by the value 3 here's the "context":
I have the following class DAO.CoverDAO which handles the CRUD operations of this table



CREATE TABLE `cover_details` (
  `refno` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `shape` tinyint(3) unsigned NOT NULL ,
  `id_color` tinyint(3) unsigned NOT NULL ',
  `reversefold` bit(1) NOT NULL DEFAULT b'0' ,
  `x` decimal(6,3) unsigned NOT NULL ,
  `y` decimal(6,3) unsigned NOT NULL DEFAULT '0.000',
  `typecut` varchar(10) NOT NULL,
  `cornershape` varchar(20) NOT NULL,
  `z` decimal(6,3) unsigned DEFAULT '0.000' ,
  `othercornerradius` decimal(6,3) unsigned DEFAULT '0.000'',
  `skirt` decimal(5,3) unsigned NOT NULL DEFAULT '7.000',
  `foamTaper` varchar(3) NOT NULL,
  `foamDensity` decimal(2,1) unsigned NOT NULL ,
  `straplocation` char(1) NOT NULL ',
  `straplength` decimal(6,3) unsigned NOT NULL,
  `strapinset` decimal(6,3) unsigned NOT NULL,
  `spayear` varchar(20) DEFAULT 'Not Specified',
  `spamake` varchar(20) DEFAULT 'Not Specified',
  `spabrand` varchar(20) DEFAULT 'Not Specified',
  PRIMARY KEY (`refno`)
) ENGINE=MyISAM AUTO_INCREMENT=143 DEFAULT CHARSET=latin1 $$



The the way covers are being inserted is by a stored procedure, which is the following:



CREATE DEFINER=`root`@`%` PROCEDURE `putCover`(
                                    IN shape TINYINT,
                                    IN color TINYINT(3),
                                    IN reverse_fold BIT,
                                    IN x DECIMAL(6,3), 
                                    IN y DECIMAL(6,3),
                                    IN type_cut VARCHAR(10),
                                    IN corner_shape VARCHAR(10),
                                    IN cutsize DECIMAL(6,3),
                                    IN corner_radius DECIMAL(6,3),
                                    IN skirt DECIMAL(5,3),
                                    IN foam_taper VARCHAR(7),
                                    IN foam_density DECIMAL(2,1),
                                    IN strap_location CHAR(1),
                                    IN strap_length DECIMAL(6,3),
                                    IN strap_inset DECIMAL(6,3)
                                    )
BEGIN
    INSERT INTO `dbre`.`cover_details` 
    (`dbre`.`cover_details`.`shape`,
     `dbre`.`cover_details`.`id_color`,
     `dbre`.`cover_details`.`reversefold`,
     `dbre`.`cover_details`.`x`,
     `dbre`.`cover_details`.`y`,
     `dbre`.`cover_details`.`typecut`,
     `dbre`.`cover_details`.`cornershape`,
     `dbre`.`cover_details`.`z`,
     `dbre`.`cover_details`.`othercornerradius`,
     `dbre`.`cover_details`.`skirt`,
     `dbre`.`cover_details`.`foamTaper`,
     `dbre`.`cover_details`.`foamDensity`,
     `dbre`.`cover_details`.`strapLocation`,
     `dbre`.`cover_details`.`strapInset`,
     `dbre`.`cover_details`.`strapLength`
     )
    VALUES
    (shape,color,reverse_fold,
     x,y,type_cut,corner_shape,
     cutsize,corner_radius,skirt,foam_taper,foam_density,
     strap_location,strap_inset,strap_length);
END


As you can see basically it just fills each field, now, the CoverDAO.create(CoverDTO cover) method which creates the cover is like so:



public void create(CoverDTO cover) throws DAOException {
        Connection link = null;
        CallableStatement query = null;
        try {
            link = MySQL.getConnection();
            link.setAutoCommit(false);
            query = link.prepareCall("{CALL putCover(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)}");
            query.setLong(1,cover.getShape());
            query.setInt(2,cover.getColor());
            query.setBoolean(3, cover.getReverseFold());
            query.setBigDecimal(4,cover.getX());
            query.setBigDecimal(5,cover.getY());
            query.setString(6,cover.getTypeCut());
            query.setString(7,cover.getCornerShape());
            query.setBigDecimal(8, cover.getZ());
            query.setBigDecimal(9, cover.getCornerRadius());
            query.setBigDecimal(10, cover.getSkirt());
            query.setString(11, cover.getFoamTaper());
            query.setBigDecimal(12, cover.getFoamDensity());
            query.setString(13, cover.getStrapLocation());
            query.setBigDecimal(14, cover.getStrapLength());
            query.setBigDecimal(15, cover.getStrapInset());
            query.executeUpdate();
            link.commit();
        } catch (SQLException e) {
            throw new DAOException(e);
        } finally {
            close(link, query);
        }
    }


The CoverDTO is made of accessesor methods, the MySQL object basically returns the connection from a pool.


Here is the pset Query with dummy but appropriate data:
putCover(1,10,0,80.000,80.000,'F','Cut',0.000,0,15.000,'4x2',1.5,'A',10.000,5.000)
As you can see everything is fine just when I write to the DB instead of 10 in the second parameter a 3 is written. I have done the following:
Traced the id_color value to the create method, still got replaced by a 3

Hardcoded the value in the DAO create method, still got replaced by a 3

Called the procedure from the MySQL Workbench, it worked fined so I assume something is happening in the create method, any help is really appreciated.


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Trouble Installing Numpy and Scipy
2010-12-27T18:08:00.003-08:00
Programmer Question
 Hi,


I'm running into difficulty what I run python setup.py install in the numpy directory.  It seems to be running alright, until it gets to a folder where permission is denied.  The error it throws is copying build/scripts.macosx-10.6-universal-2.6/f2py -> /usr/local/bin
error: /usr/local/bin/f2py: Permission denied.  If someone could please help me I'd like to get his up an running.  Thanks


Environment:  GCC: i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
fortran: GNU Fortran (GCC) 4.2.3
And here is a gist of the output of what happens when I run python setup.py build https://gist.github.com/756792


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Is there a better way to do SELECT queries in MySQL and sort them in PHP than this way?
2010-12-27T18:08:00.001-08:00
Programmer Question
 I am just learning PHP/MySQL, one this I am having to do a lot is displaying data that was previously inserted into the database out to the user's browser. So I am doing this:


$select = mysql_query('SELECT * FROM pages');

while ($return = mysql_fetch_assoc($select))
{
     $title = $return['title'];
     $author = $return['author'];
     $content = $return['content'];
}


then I can use these variables through out the page. Now, doing it the above way isn't an issue when I only have 3 columns in a database but what if I am dealing with a huge database with many more columns. 


I have a nagging feeling that the pros do it in some more efficient way where they maybe loop through the table they are selecting from to find all columns it has and associate them with variables automatically. Is that the case? or is the above how you guys do it too?


EDIT


Thanks for the answers guys, they have helped me to explain what I had in mind better. The reason why I am trying to do this, is so that I have to write less.


Is it possible to get the names of the columns of a table automatically. Then have a loop that will automatically create the variables naming them the same as the column names:


some type of loop 
{

   $nameofcolumn = $return['$nameofcolumn'];

}


This way I don't have to manually repeat myself:


 $title = $return['title'];
 $author = $return['author'];
 $content = $return['content'];


Because normally I just name the variables the same as the table column names.


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ERROR: iPhone Private Frameworks "No such file or directory"
2010-12-26T18:08:00.003-08:00
Programmer Question
 I have added Private Frameworks To my project. When I build in DEVICE | RELEASE everything works fine and I am able to ldid -S the application and it successfully launches on my device.


However, when trying to BUILD AND GO in Simulator, I get the error "No such file or directory" as indicated below: (I also get the error twice which is strange too.)


 Line Location HomeProfileViewController.h:10: error:  BluetoothManager/BluetoothManager.h:  No such file or directory


Below are the project and build settings that I currently have, maybe someone can find a mistake and let me know, that would be awesome!


PROJECT SETTINGS:


PRIVATE_HEADERS_FOLDER_PATH = "/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include"
PUBLIC_HEADERS_FOLDER_PATH = "/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include"
USER_HEADER_SEARCH_PATHS = "/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include"

OTHER_CFLAGS = "-I/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include-I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/include-I/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/gcc/arm-apple-darwin9/4.0.1/include-F/System/Library/Frameworks-F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks-F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/PrivateFrameworks-DMAC_OS_X_VERSION_MAX_ALLOWED=1050"


TARGET BUILD SETTINGS:


PRIVATE_HEADERS_FOLDER_PATH = "/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/PrivateFrameworks"
FRAMEWORK_SEARCH_PATHS = "$(inherited) $(SDKROOT)$(SYSTEM_LIBRARY_DIR)/PrivateFrameworks"
USER_HEADER_SEARCH_PATHS = "/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include/**"

OTHER_CFLAGS = "-I/Developer/SDKs/iPhoneOS.sdk/Versions/iPhoneOS3.0.sdk/include-I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/include-I/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/gcc/arm-apple-darwin9/4.0.1/include-F/System/Library/Frameworks-F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/Frameworks-F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/System/Library/PrivateFrameworks-DMAC_OS_X_VERSION_MAX_ALLOWED=1050"


Note: The quotation marks in the paths aren't actually in my project, I put them in so the site will syntax them better.


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Putting Javascript into CSS
2010-12-26T18:08:00.001-08:00
Programmer Question
 I've been thinking about something. On my forum, there are default CSS codes that the users can choose from. This changes everything from background to text color. I have a javascript code. Is it possible to make it so that the javascript is part of the CSS, so that if a certain CSS code is defaulted, then part of it is that javascript?


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Java Visualisation / Charting library like Google Chars / Visualations
2010-12-24T18:08:00.003-08:00
Programmer Question
 Unfortunately Google Charts / Visualisations it no available for download in any form. I require a standalone library for numerous reasons and using the services offered by Google is not a satisfactory option.


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What are valid values for the id attribute in HTML?
2010-12-24T18:08:00.001-08:00
Programmer Question
 When creating the id attributes for HTML elements, what rules are there for the value?


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How to deal with tags in a normalized database?
2010-12-23T18:08:00.003-08:00
Programmer Question
 I am trying to normalize a database I am building. One part of it is that I have many different tests that each can have many different tags. How would you deal with this?


Would you have a table with your tags and then have a limit on the number of tags per test?


I am new to databases let alone the whole idea of normalizing so forgive me if this is a very simplistic question.


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Python GTK "Getting started" tutorial problem
2010-12-23T18:08:00.001-08:00
Programmer Question
 Hello everybody!
I have a problem with compiling a basic and really simple example of PyGTK usage listed on pygtk's website.


This is the first example from this site:
http://www.pygtk.org/pygtk2tutorial/ch-GettingStarted.html


My code looks like this:


#!/usr/bin/env python

# example gtk.py

import pygtk
pygtk.require('2.0')
import gtk

class Base:
    def __init__(self):
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.show()

    def main(self):
        gtk.main()

print __name__
if __name__ == "__main__":
    base = Base()
    base.main()


And after calling python gtk.py, i'm getting the following error:



  gtk
  main
  Traceback (most recent call last):
    File "gtk.py", line 19, in 
      base = Base()
    File "gtk.py", line 11, in init
      self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
  AttributeError: 'module' object has no attribute 'Window'



I've found an info somewhere that it shpuld be fixed by installing PyGTK from source. I did it but it changed nothing. The message is still the same.


I'm using ubuntu 10.10


Have you any ideas on what can be wrong ?
Thanks for any help!


Mike


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Text editor design considerations
2010-12-22T18:08:00.003-08:00
Programmer Question
 Hi,
My question is that while designing a text editor for html/xml like markup languages with some common features such as auto-indent, syntax highlight, code folding, auto-completion, etc. What are the critical and important points which are needed to be considered, for the sake of efficiency? Is there any common design and development approach or principles that can be helpful in text editor development?


Thanks in advance 


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Hello World Problem in Ecliplse with Anroid 2.3 used min 7 instead of min 9
2010-12-22T18:08:00.001-08:00
Programmer Question
 */I am Having a Similar Problem.......... Any Suggestions/ 


package com.example.helloandroid6; 
import android.app.Activity; import android.os.Bundle; 
import android.widget.TextView; public class HelloAndroid extends Activity {
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState)
 { super.onCreate(savedInstanceState); 
TextView tv = new TextView(this); 
tv.setText("Hello, Android Developers"); 
setContentView(tv);
 } 
}


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Dealing with complexity
2010-12-20T18:07:00.001-08:00
Programmer Question
 Forgive me for asking a rather general question, but how do you psychologically deal with high levels of complexity in software projects?


I'm working on a personal compiler project and am currently trying to understand the unmanaged .net metadata API (and before anybody mentions it, Reflection.Emit is not sufficient for my needs!) which are horribly opaque and have very little documentation. Half the time the documentation consists of PaintFooRed() - 'this function paints Foo red.' so I'm really scrabbling around in the dark trying to work things out through trial, error and working things out from first principals.


When dealing with enormous complexity like this I find the uncertainty of a. how long something may take, b. whether it's even possible and c. whether the approach I'm taking is correct is very difficult to deal with. 


How do you deal with this kind of situation?


I've found that solving problems of this degree of uncertainty and complexity are a considerably greater joy than finding the solution to more trivial tasks - has anybody else experienced this too?


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GCC function padding value
2010-12-19T18:07:00.003-08:00
Programmer Question
 Whenever I compile C or C++ code with optimizations enable,d GCC aligns functions to a 16-byte boundary (on IA-32). If the function is shorter than 16 bytes, GCC pads it with some bytes, which don't seem to be random at all:


19:   c3                      ret
1a:   8d b6 00 00 00 00       lea    0x0(%esi),%esi


It always seems to be either 8d b6 00 00 00 00 ... or 8d 74 26 00.


Do function padding bytes have any significance?


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using CreateProcess with a relative path
2010-12-19T18:07:00.001-08:00
Programmer Question
 Is it possible to pass a relative path to create my child process?
This code will compile, but it gives an error because I'm using a relative path.


void Cminivideo3App::creerChildProcess(void)
{
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );

    // Start the child process. 
  int retvalue =   CreateProcess( TEXT("\..\Debug\traitement.exe"),   // No module name (use command line)
        NULL,        // Command line
        NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi            // Pointer to PROCESS_INFORMATION structure
    );

  int lastError = GetLastError();


}


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How to associate descendant models to a parent.
2010-12-16T18:08:00.003-08:00
Programmer Question
 Hi, I have the following models:


Account
  has_many :libraries

Library
  has_many :topics
  belongs_to :account

Topic
  has_many :functions
  belongs_to :library

Function
  has_one :example
  belongs_to :topic

Example
  belongs_to :function


I would like to be able to able to do things such as:


some_account.libraries
some_account.topics
some_account.functions
some_account.examples


In addition, I would like to be able to assign an account to a descendant, i.e


some_example.account = some_account
some_function.account = some_account
some_topic.account = some_account
some_library.account = some_account


To give some context:
I am letting a user (Account) create each Library, Topic, Function, Example. record separately. Then a user is free to change how the records are associated: Change the topic of a Function, move a Topic to a different Library, add an example to a function, and so on.


To my understanding no matter what record is created, I would need to assign it to a user (account) so that I can have a list of each Model records that a user has created, as well as prevent other users from seeing stuff that doesn't belong to them


Although I might be overcomplicating, I really don't know :(


Thanks in advance.


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EPSG:4008 Layer Not Displaying
2010-12-16T18:08:00.001-08:00
Programmer Question
 Hello StackOverFlow,


I have a map with OSM and Google Base layers and EPSG:4326 overlays.  Now I am also trying to add overlays with other EPSG's to my map.  Overlays which had an EPSG:2333 displayed just fine with no problems.  Then I tried to add a layer with EPSG:4008 and nothing showed up.  I posted on the openLayers forum and was told to look into the proj4js project (many thanks for that btw!).  I have tried using it and it seems promising, but it is just not working for me :(


In my body tag I have the scripts