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• Why does my Perl program print the help message when an arguments has 0 as a value?

  - by David

  If i do this: GetOptions( 'u=s' => \$in_username, 'r=i' => \$in_readonly, 'b=i' => \$in_backup ); exit usage() unless $in_username && $in_readonly && $in_backup; and call the program like this: ./app.pl -u david -r 12 -b 0 it always results in calling usage(), so obviously the 0 is not seen as an integer value. What can i do accept integer values AND 0?

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• Cucumber/Webrat: follow link by CSS class?

  - by Joe

  Hello there, is it possible to follow a link by it's class name instead of the id, text or title? Given I have (haha, cucumber insider he?) the following html code: <div id="some_information_container"> <a href="edit" class="edit_button">Translation here</a> </div> I do not want to match by text because I'd have to care about the translation values in my tests I want to have my buttons look all the same style, so I will use the CSS class. I don't want to assign a id to every single link, because some of them are perfectly identified through the container and the link class Is there anything I missed in Cucumber/Webrat? Or do you have some advices to solve this in a better way? Thanks for your help and best regards, Joe edit: I found an interesting discussion going on about this topic right here - seems to remain an open issue for now. Do you have any other solutions for this?

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• Reading string value from Excel with HSSF but it's double

  - by egaga

  Hi, I'm using HSSF-POI for reading excel data. The problem is I have values in a cell that look like a number but really are strings. If I look at the format cell in Excel, it says the type is "text". Still the HSSF Cell thinks it's numeric. How can I get the value as a string? If I try to use cell.getRichStringValue, I get exception; if cell.toString, it's not the exact same value as in Excel sheet. Thanks! edit: until this gets resolved, I'll use new BigDecimal(cell.getNumericCellValue()).toString()

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• struct assignment operator on arrays

  - by Django fan

  Suppose I defined a structure like this: struct person { char name [10]; int age; }; and declared two person variables: person Bob; person John; where Bob.name = "Bob", Bob.age = 30 and John.name = "John",John.age = 25. and I called Bob = John; struct person would do a Memberwise assignment and assign Johns's member values to Bob's. But arrays can't assign to arrays, so how does the assignment of the "name" array work?

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• How can I find which process has opened a specific file?

  - by Hosam Aly

  How can I find which processes have a specific file opened, and their open, access and share modes? Additionally, is it possible to change these values for a process? Or is it even possible to open a file for reading if it is already opened for exclusive access by another process? Please note that I don't want to invalidate the handle of the process having the file opened. I just want to be able to access the file (if possible). (I'm mainly asking about Windows, but solutions for other platforms are welcome, since they contribute to the community's knowledge.) Edit: I found some answers for my first question here and there. Edit 2: Thanks everybody for the tools you mentioned, but I am mainly looking for programmatical techniques (e.g. using Win32 APIs).

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• XPATH - Select all child nodes with a specific attribute

  - by David

  Hi, what would be the xpath for the following: Find all child nodes with a specific attibute value but starting from a node with a specific attribute value. This is kind of related to a question I posted earlier about parsing and rdf xml file - I thought I had solved it but not quite yet. For example I am trying to parse and grab all of the rdf:about attribute values. I have this working fine. I need to add the following condition though - parsing needs to start after a specific rdf:about value is found. I am working in php and and using DomDocument and am using the following xpath query: $xpath-query('//@rdf:about') - it is finding all rdf:about attributes fine. I need to extend this to only find thos attributes that come after the node who rdf:about attribute is equal to something. Hope this makes sense.

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• UIView Animation iPhone (obtaining information on the frame dynamically)

  - by Urizen

  I have a UIView called goalBar which is being animated by increasing the size of the frame according to a float value called destination: CGRect goalBarRect = CGRectMake(0, 0, destination, 29); [UIView beginAnimations:@"goal" context:nil]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [UIView setAnimationDuration:2.0f]; goalBar.frame = goalBarRect; [UIView commitAnimations]; The animation works perfectly and the rectangular view increases its width over the course of the animation (from 0 to the value for destination). However, I wish to be able to extract the values for the frame of the UIView being animated (i.e. goalBar) as the animation takes place. By that I mean that I wish to place the value of the width for the animated frame in a separate UILabel so that the user sees a counter that provides the width of the UIView as it's being animated. Any help on how to do the above would be gratefully received.

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• C# out parameter value passing..

  - by Pandiya Chendur

  I am using contactsreader.dll to import my gmail contacts... One of my method has out parameter... I am doing this, Gmail gm = new Gmail(); DataTable dt = new DataTable(); string strerr; gm.GetContacts("[email protected]", "******", true, dt,strerr); // It gives invalid arguments error.. and my gmail class has, public void GetContacts(string strUserName, string strPassword,out bool boolIsOK, out DataTable dtContatct, out string strError); Am i passing the correct values for out parameters...

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• Log to rolling CSV file with Enterprise Library

  - by Tinminator

  Need logging to: Rolling file, to avoid 1 big log file. CSV format for easier look up. I can see EntLib (5.0) have Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.RollingFlatFileTraceListener to log to rolling log file. To make the log entries look like a CSV row, I can change the Logging.Formatters.TextFormatter.Template to put double quote around the values. Also change the Listener's Footer and Header to nothing, so they won't be output. Under normal circumstance, this would give me a well formed CSV file. However if a token value in the Template contain double quote, this would not be escaped, hence the log file become an invalid CSV file. Is there any way to resolve this? Is there any alternative solutions to this problem?

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• where to add a COLLATION in an SPROC

  - by Daria

  i've got a collation error happening in a stored procedure in SQL Server. Cannot resolve the collation conflict between "Latin1_General_CS_AS" and "SQL_Latin1_General_CP1_CI_AS" in the equal to operation. The database's collation is Latin1_General_CS_AS The error happens on the INSERT INTO line. Where should i add a COLLATE statement? CREATE TABLE #TempList ( TNR varchar(10) ) DECLARE @TNR varchar(10), @Pos int SET @subjectList = LTRIM(RTRIM(@subjectList))+ ',' SET @Pos = CHARINDEX(',', @subjectList, 1) IF REPLACE(@subjectList, ',', '') <> '' BEGIN WHILE @Pos > 0 BEGIN SET @TNR = LTRIM(RTRIM(LEFT(@subjectList, @Pos - 1))) IF @TNR <> '' BEGIN INSERT INTO #TempList (TNR) VALUES (CAST(@TNR AS varchar(10))) --this is where it errors END SET @subjectList = RIGHT(@subjectList, LEN(@subjectList) - @Pos) SET @Pos = CHARINDEX(',', @subjectList, 1) END END

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• Is there good .sol editor for Flash Player 9 Local Shared Objects? Can we build one?

  - by nerdabilly

  There's plenty of them out there but none of them do what I would like them to do. Most of them crash when opening a file or simply corrupt the data. Many don't run at all. It seems to me that most were written 3-4 years ago for AS2 .sols and no longer work with FP9/AS3 sols. I'd attempt to write my own using AIR but I can't find a new spec of the byte format. There's an explanation of the file format here: http://sourceforge.net/docman/display_doc.php?docid=27026&group_id=131628 and another here: http://sourceforge.net/docman/display_doc.php?docid=27026&group_id=131628 but it looks as though both of these docs are a good 4 years old (pre-FP9) and as I'm not skilled or experienced in file formats, writing a new one, especially without an updated spec, is seeming like less and less of a viable option. Ideally I'd like one that can not only read the .sol, but edit and save new values also. Thanks!

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• pythonic way to associate list elements with their indices

  - by Dragan Chupacabrovic

  Hello Everybody, I have a list of values and I want to put them in a dictionary that would map each value to it's index. I can do it this way: >>> t = (5,6,7) >>> d = dict(zip(t, range(len(t)))) >>> d {5: 0, 6: 1, 7: 2} this is not bad, but I'm looking for something more elegant. I've come across the following, but it does the opposite of what I need: >>> d = dict(enumerate(t)) >>> d {0: 5, 1: 6, 2: 7} Please share your solutions, Thank you

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• Help with Strings in C

  - by Anon

  Given the char * variables name1 , name2 , and name3 , write a fragment of code that assigns the largest value to the variable max (assume all three have already been declared and have been assigned values). I've tried and came up with this: if ((strcmp(name1,name2)0)&&(strcmp(name1,name3)0)){ max=name1; } else if ((strcmp(name2,name1)0)&&(strcmp(name2,name3)0)){ max=name2; } else if ((strcmp(name3,name1)0)&&(strcmp(name3,name2)0)){ max=name3; } However, I get this error Your code is incorrect. You are not handling the situation                where two or more strings are equal.

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• rails date field format on error

  - by ash34

  Hi, I have an input field that captures a date in my form <%= f.text_field :from_date, :style => 'width:80px;' %> The user enters the date in the following format MM/DD/YYYY. However, when there is a validation error in the model and the form is displayed back to the user with the entered values, the date format is converted to YYYY-MM-DD HH:MM:SS UTC. Where do I format this to show MM/DD/YYYY, when the form is displayed to the user. thanks.

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• Javascript: variable in outer function not changed by inner function

  - by Weng-Lock Mok

  I am having a small issue with what I believe is probably my misunderstanding of Javascript closures. I have this piece of code -- getStdOpts: function(tbl, filt) { var vals = new Array(); this.srvs.getStdOptions( { tbl: tbl }, { 'ok': function(rsp) { for (var i in rsp) { vals.push({ value: rsp[i].id, text: rsp[i].descr }); } } } ); return vals; } In essence, although the inner function inside the getStdOptions call ('ok': function...) pushes new values into the vals array, when accessed from outside the call, the vals array is empty. When accessed from within the inner function, vals contains all the elements as expected. Would really appreciate any help I can get on this matter.

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• Using TSQLUnit to test INSTEAD OF triggers

  - by Jeff Jones

  I have an INSTEAD OF trigger on a table in my SQL Server 2005 database that checks several incoming values. If an incoming value is invalid, an error is raised and the transaction is rolled back. Otherwise the record is inserted. I would like to include a TSQLUnit test of this trigger where, if an invalid value is inserted, having the transaction rolled back is the successful outcome of the test. I have created a test procedure to do this, but rolling back the transaction aborts execution of the whole suite of tests. Has anyone had success with this? If so, how did you accomplish it? If this is not possible with TSQLUnit, how do you test your triggers? Or do you test them at all?

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• Apache Cassandra overwhelming bandwidth overhead

  - by tanyehzheng

  while testing Apache Cassandra, I inserted 1000 rows of data. I allow it to propagate to the other machine on LAN. This is a 2 machine cluster. I monitor the network connection between the two machine. The total data I expected to flow between the two servers should be around 25Mb including all column names, column values and timestamps). But the actual data sent and received between them was an whopping 362Mb!! Anybody knows why is there such an overwhelming overhead? Thank you

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• Sqlite: Selecting records spread over total records

  - by Martin

  I have a sql / sqlite question. I need to write a query that select some values from a sqlite database table. I always want the maximal returned records to be 20. If the total selected records are more than 20 I need to select 20 records that are spread over the total records. It is also important that I always select the first and last value from the table when sorted on the date. I know how to accomplish this in code but it would be perfect to have a sqlite query that can do the same. The query Im using now is really simple and looks like this: "SELECT value,date,valueid FROM tblvalue WHERE tblvalue.deleted=0 ORDER BY DATE(date)" Hope I explained what I need, thanks for your help!

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• Annotate and Aggregate function in django

  - by thesteve

  In django I have the following tables and am trying to count the number of votes by item. class Votes(models.Model): user = models.ForeignKey(User) item = models.ForeignKey(Item) class Item(models.Model): name = models.CharField() description = models.TextField() I have the following queryset queryset = Votes.objects.values('item__name').annotate(Count('item')) that returns a list with item name and view count but not the item object. How can I set it up so that the object is returned instead of just the string value? I have been messing around with Manager and Queryset methods, that the right track? Any advice would be appreciated.

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• NamedParameterJdbcTemplate jconnect decimal issue

  - by user1052849

  I am using NamedParameterJdbcTemplate to insert data into a table. (Spring 2.5.3/Java 1.6) I am using jconnect driver to connect to sybase jdbc:sybase:Tds:<Server>:<Port>. For some reason the decimal values the decimal part is truncated. With the same code if I use jtds driver (jdbc:jtds:sybase://<Servername>:<Port>) its working fine. I cannot use jtds as jconn is being used by other code. In Java objects, field is defined as double. In database, field is defined as float (numeric with precision does not work). Any help is appreciated.

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• Get used color names from image

  - by atmorell

  Hello, I would like to check what colors is present in a image. This will be stored in the database and used for a search form. (red=1, green=1, blue=0, yellow=1, black=1, white=1 etc.) img = Magick::Image.read('phosto-file.jpg').first img = img.quantize(10 h = img.color_histogram pp h {red=12815, green=18494, blue=15439, opacity=0=>13007, red=44662, green=47670, blue=51967, opacity=0=>18254, red=17608, green=43331, blue=48321, opacity=0=>11597, red=21105, green=25865, blue=39467, opacity=0=>10604, red=15125, green=36629, blue=22824, opacity=0=>10223, red=52102, green=42405, blue=10063, opacity=0=>12928, red=39043, green=28726, blue=40855, opacity=0=>7728, red=10410, green=8880, blue=7826, opacity=0=>13795, red=25484, green=25337, blue=24235, opacity=0=>7351, red=44485, green=12617, blue=11169, opacity=0=>14513} How do I convert the 10 values to color names? red, green, NOMATCH, yellow, black, white etc. Only need the rough color name - not LimeGreen but Green etc. Best regards. Asbjørn Morell

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• how to write re-usable views in django?

  - by rz

  These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, Should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal?

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• Nonstandard SSIS lookup

  - by Stefan

  I have a situation where I am trying to lookup a value in one table based on values in another table, using a BETWEEN operator and not an = operator. In one table, I have a value "EffectiveDate". I want to get a Weight number from another table, but the other table has two fields: "Inception" and "Termination". What I want to do is extract the Weight from that table for use where the EffectiveDate is between Inception and Termination. SSIS doesn't seem to provide a way to do this. It's good at matching one column to another column, but doesn't seem to allow one to many-column comparison/operations. Am I missing anything? Is this possible to do somehow?

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• OpenCV SVD Matrix format.

  - by Rick

  I currently have a set of 2D Cartesian coordinates e.g. {(1,3), (2,2), (3,4)} Which will be put into a 2D array, to perform SVD properly would the matrix be put together such that the coordinates form the columns or the rows e.g. 1 3 2 2 3 4 or 1 2 3 3 2 4 I have been doing a little trial and error comparing to examples of SVD I have found online, the resulting matrix usually seems to be negated, with some of the values shuffled around. To clarify further if I had a matrix E which was MxN as shown here http://upload.wikimedia.org/wikipedia/commons/b/bb/Matrix.svg To define the matrix as a 2D array would it be Array[M][N] or Array[N][M] I am assuming this actually matters due to matrix arithmetic not being commutative? Can anyone actually verify this?

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• How to judge the relative efficiency of algorithms given runtimes as functions of 'n'?

  - by Lopa

  Consider two algorithms A and B which solve the same problem, and have time complexities (in terms of the number of elementary operations they perform) given respectively by a(n) = 9n+6 b(n) = 2(n^2)+1 (i) Which algorithm is the best asymptotically? (ii) Which is the best for small input sizes n, and for what values of n is this the case? (You may assume where necessary that n0.) i think its 9n+6. guys could you please help me with whether its right or wrong?? and whats the answer for part b. what exactly do they want?

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