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• How do I get google guice to inject a custom logger, say a commons-logging or log4j logger

  - by Miguel Silva

  Google guice has a built-in logger binding (http://code.google.com/p/google-guice/wiki/BuiltInBindings). But what if I want to use a commons-logging or log4j logger? Can I get guice to inject a Log created by LogFactory.getLog(CLASS.class) But having the same behavior as in built-in binding: The binding automatically sets the logger's name to the name of the class into which the Logger is being injected.. Does it even makes sense? Or shout I simply use the built-in java Logger? Or just use commons-logging without injections?

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• Differences in behaviour between IIS and the ASP.Net Web Development Server?

  - by Kramii

  During development, I usually test ASP.Net applications using the Web Development Server (sometimes called Cassini). Occasionally, when I publish to a real IIS environment, I notice that the application behaves differently. So, what are the differences between the way that production IIS servers and the ASP.Net Web Development Server behave? I don't mean differences in feature sets (clearly IIS has lots of features that are not present in WDS), but differences in the way they handle ASP.Net. BTW: There are a few differences noted in the responses to this question, but I am sure there must be more.

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• When should I use String.Format or String.Concat instead of the concatenation operator?

  - by Kramii

  In C# it is possible to concatenate strings in several different ways: Using the concatenation operator: var newString = "The answer is '" + value + "'."; Using String.Format: var newString = String.Format("The answer is '{0}'.", value); Using String.Concat: var newString = String.Concat("The answer is '", value, "'."); What are the advantages / disadvantages of each of these methods? When should I prefer one over the others? The question arises because of a debate between developers. One never uses String.Format for concatenation - he argues that this is for formatting strings, not for concatenation, and that is is always unreadable because the items in the string are expressed in the wrong order. The other frequently uses String.Format for concatenation, because he thinks it makes the code easier to read, especially where there are several sets of quotes involved. Both these developers also use the concatenation operator and String.Builder, too.

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• VBA - Create ADODB.Recordset from the contents of a spreadsheet

  - by robault

  Hello, I am working on an Excel application that queries a SQL database. The queries can take a long time to run (20-40 min). If I've miss-coded something it can take a long time to error or reach a break point. I can save the results to a sheet fine, it's when I am working with the record sets that things can blow up. Is there a way to load the data into a ADODB.Recordset when I'm debugging to skip querying the database (after the first time)? Would I use something like this? http://stackoverflow.com/questions/2086234/query-excel-worksheet-in-ms-access-vba-using-adodb-recordset

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• Ruby on Rails Foreigner plugin not working for SQL Server

  - by Earlz

  Well, now that I've finally got my stupid ODBC stuff configured, I took a schema.rb file that I dumped from a Postgres database and did a db:schema:load on it in a Rails project configured for SQL Server. Well, it sets up all the schema in the SQL Server database except for a minor detail: No foreign keys are created. The rake command doesn't show any errors and does say it is adding foreign keys. But they don't actually get added. This is the last bit from the command: -- add_foreign_key("workhistoryform", "form", {:name=>"workhistoryform_form_rid_fkey", :column=>"form_rid", :primary_key=>"form_rid"}) -> 0.0002s -- initialize_schema_migrations_table() -> 0.0092s -- assume_migrated_upto_version(0) -> 0.0942s [earlz@earlzarch avp_msql_migrations]$ So what is the problem? Does the Foreigner plugin not work in SQL Server? If it didn't I'd expect to see an error or something...

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• multiple polls with email submit function

  - by Chris Mousdale

  I want to add a 4 sets of polls that each have around 4 radio buttons each for answers - then i would like to add an 'enter your email address' field below these polls. Finally I would like the submit button after the email field to 'submit' the data from the polls and the email address entered - so only one submit button. Just to make things even better, I would like some form of validation, that will not pass the form unless all 4 polls have a radio button pressed and a valid email. All this is then to go into a MySQL database. I have the email validation bit nailed - so thats fine.. it's the multiple polls bit thats getting me - I cannot get it to work?! Do i have to effectively add 5 forms? Any help would be greatly appreciated.

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• Regression tests for T-SQL stored procedures

  - by Achim

  Hi, I would like to regression test t-sql stored procedures. My idea is to specify for each SP multiple input parameter sets. The SP should be executed with these parameters, results should be written to disc. Next time the new results should be compared with results stored before. Does anybody know a good tool for something like that? Should not be that hard to implement, but in practice you will need functionality like "ignore that column" or something like that. And I would assume that such a tool should already exist!? cheers, Achim

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• How to specify custom Sass directory with sinatra

  - by yaya3

  Instead of serving my Sass files from the default 'views' directory I'd like to change this to /assets/sass The following attempts are in my main ruby root file in the app: Attempt 1 set :sass, Proc.new { File.join(root, "assets/sass") } get '/stylesheet.css' do sass :core end With this I get the following error: myapp.rb:17 NoMethodError: undefined method `merge' for "/Users/x/x/x/mysinatraapp/assets/sass":String Attempt 2 get '/stylesheet.css' do sass :'/assets/sass/core' end Attempt 3 get '/stylesheet.css' do sass :'/assets/sass/core' end Both return the following error: Errno::ENOENT: No such file or directory - ./views/assets/sass/core.sass Attempt 4 get '/stylesheet.css' do sass :'../assets/sass/core' end This works! however, there must be something along the lines of set :sass, Proc.new { File.join(root, "assets/sass") } that sets this up for me?

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• Nested ComboBox doesn't update source by selection.

  - by Shimmy

  Hello. I am using a ComboBox bound under a DataContext: <tk:DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <ComboBox ItemsSource="{Binding Source={StaticResource CategoriesCollection}" DisplayMemberPath="Title" SelectedItem="{Binding Category}" /> </DataTemplate> </tk:DataGridTemplateColumn.CellEditingTemplate> When the row is initiated the value of Category is null. Once I select the first value in the ComboBox it sets it up. But when I select another value, it doesn't get changed.

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• Databinding race condition

  - by Stephen Price

  I have a login form (using ChildWindow) and have implemented a Keyup event handler on the passwordbox. If the key is enter then it sets the ChildWindow ResultDialog to true. What seems to be happening is the databinding on the Passwordbox is not happening before the childwindow is closed so the Password property on my Login control is null. I've tried using KeyUp and Keydown, as well as using a buttonAutoPeer to invoke a click on the Ok button. I've also tried setting the focus to the OKbutton before setting the DialogResult (which closes the window). private void PasswordBox_KeyUp(object sender, KeyEventArgs e) { if (e.Key == Key.Enter) { if (UsernameBox.Text != userPrompt && !string.IsNullOrEmpty(PasswordBox.Password.Trim())) { this.DialogResult = true; } else { UsernameBox.Focus(); } } }

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• All possible combinations of n items selected randomly from a set of x items (algorithm)

  - by SubPortal

  I have a set of x string items e.g("A","B","C","D","E","F") I need to know the formula that calculates how many combinations of n items and what is the algorithm that generates all possible combinations e.g if we need to select 4 items from the list randomly. those 4 items could be: ("A","B","C","D") or ("A","B","C","E") or ("A","B","C","F") or ("A","B","D","E") ...etc I need the formula that calculates how many sets of items will be generated without repetition, that is we consider ("A","B","C","D") as one of the resulted combinations we cannot consider the same items as another resultant combination with replacing the positions of the items in the set like ("A","B","D","C") Also I need the algorithm that generates all possible combinations in any programming language. [C#,VB.NET,Java,C++] Thank you for any help.

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• Dynamics of the using keyword

  - by AngryHacker

  Consider the following code: // module level declaration Socket _client; void ProcessSocket() { _client = GetSocketFromSomewhere(); using (_client) { DoStuff(); // receive and send data Close(); } } void Close() { _client.Close(); _client = null; } Given that that the code calls the Close() method, which closes the _client socket and sets it to null, while still inside the `using' block, what exactly happens behind the scenes? Does the socket really get closed? Are there side effects? P.S. This is using C# 3.0 on the .NET MicroFramework, but I suppose the c#, the language, should function identically. The reason i am asking is that occasionally, very rarely, I run out of sockets (which is a very precious resource on a .NET MF devices).

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• Best Persistence API for use with GWT

  - by KevMo

  What is the best persistence API for use with GWT? Sadly, the application will be hosted on my own java server, as I will need more control than GAE will give me. I know I will need to have two sets of my entities, one for the server side, and some pojo's for the client side. I'm looking to make the mapping of the data as simple as possible between the two, but these will be deeply nested objects so it has to be robust. I was looking at Dozer for my mapping needs. Previously I've used EJB3 with TopLink, so that's very familiar to me, but I would like to get community input on what other API's work well with Dozer and GWT.

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• Source Controlled Database Data import strategies.

  - by H. Abraham Chavez

  So I've gotten a project and got the db team sold on source control for the db (weird right?) anyway, the db already exists, it is massive, and the application is very dependent on the data. The developers need up to three different flavors of the data to work against when writing SPROCs and so on. Obviously I could script out data inserts. But my question is what tools or strategies do you use to build a db from source control and populate it with multiple large sets of data?

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• Self Assessment Tests for Programmers

  - by THX1138.6

  I want to help the Dev team identify areas of knowledge (practical and theoretical) that they can work on. Though I am big believer in focusing on people's strengths being a good programmer requires (I think) being challenged by concepts and ideas that don't always come naturally. We work largely in the web app space using PHP & MySQL but better skills in data modelling, query optimisation, use of MVC and OOP etc. would help the team and the company a lot. I want to help the Dev team manage their careers, explore and expand their skills sets. Be all they can be and better than they were previously. I know its an idealistic goal but work must be about more than simply getting the work done. There should be some time to review, to learn, to grow and get better. Any thoughts, ideas, opinions and directions to tests or similar resources would be greatly appreciated.

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• How can I reprogram a USB "easy button"?

  - by Shawn Simon

  I have a USB "easy button"- is a USB cable attached to a large button. It appears as a keyboard to the computer. When I push the button, it sends the keys Start+R and then quickly types in a pre-configured URL. I am fairly certain that the company that produces these buttons sets the URL via some sort of software over USB. How could I reprogram the button myself? What sort of software would I need? Here is a link to the website: http://www.usbsmartbuttons.com/

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• Python-McNuggets problem

  - by challarao

  Hi! I am a student of IIIT.I am new to python.This question is one of the problems in my problem set.Please Help me writing program such as in what I should do it. Show that it is possible to buy exactly 50, 51, 52, 53, 54, and 55 McNuggets, by finding solutions to the Diophantine equation. You can solve this in your head, using paper and pencil, or writing a program. However you chose to solve this problem, list the combinations of 6, 9 and 20 packs of McNuggets you need to buy in order to get each of the exact amounts. Given that it is possible to buy sets of 50, 51, 52, 53, 54 or 55 McNuggets by combinations of 6, 9 and 20 packs, show that it is possible to buy 56, 57,..., 65 McNuggets. In other words, show how, given solutions for 50-55, one can derive solutions for 56-65 6a + 9b + 20c = n

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• I've got a ComboBox that's giving me grief in WPF using the MVVM pattern

  - by Mike

  Here's my code: <ComboBox Grid.Column="1" Grid.Row="9" ItemsSource="{Binding Path=PriorityEntries}" SelectedItem="{Binding Path=Priority,Mode=TwoWay}"/> The comboBox is bound properly with PriorityEntries, and when i change the value of the comboBox the "set" of the bound property(Priority) is called setting it to what it needs to be. However, when i close the UserControl that this combobox resides, it calls the set property again with a value of null and then sets what the selectedItem was to null. Why is the comboBox being bound again when I close the usercontrol. I tried setting the mode to OneTime, but that won't reflect any changes...

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• NSMutableDictionary of NSMutableSets... sorting this out

  - by Mike

  I have a NSMutableDictionary of NSMutableSets. Each set entry is a string, something like this: NSMutableSet *mySet = [NSMutableSet setWithObjects: [NSString stringWithFormat:@"%d", time1], [NSString stringWithFormat:@"%d", time2], [NSString stringWithFormat:@"%d", time3], nil]; // time 1,2,3, are NSTimeInterval variables then I store each set on the dictionary using this: NSString *rightNowString = [NSString stringWithFormat:@"%d", rightNow]; [myDict setValue:mySet forKey:rightNow]; // rightNow is NSTimeInterval as rightNow key can occur out of order, I end with a NSDictionary that is not ordered by rightNow. How can I sort this NSDictionary by its keys considering that they are numbers stored as strings on the dictionary...? I don't care for ordering the sets, just the dictionary. thanks for any help.

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• Using a edit template without using Html.EditorFor()

  - by Mark Nijhof

  I have a date time picker combination in a edit template that can be used like Html.EditorFor(x = x.ETA) but now I want to use the same template somewhere where I don't have a model that contains a DateTime property. So I tried Html.Editor("DateWithTime", "Arrival") which uses the correct template, but doesn't assign a value to ViewData.ModelMetadata.PropertyName which is something that my template relies on. It sets the id of the textbox which is obviously important. Is there a way to render the template and assign a id value to the ViewData.ModelMetadata.PropertyName so I can re-use the logic in the template instead of having to copy it?

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• Discrete and Continuous Classifier on Sparse Data

  - by Chris S

  I'm trying to classify an example, which contains discrete and continuous features. Also, the example represents sparse data, so even though the system may have been trained on 100 features, the example may only have 12. What would be the best classifier algorithm to use to accomplish this? I've been looking at Bayes, Maxent, Decision Tree, and KNN, but I'm not sure any fit the bill exactly. The biggest sticking point I've found is that most implementations don't support sparse data sets and both discrete and continuous features. Can anyone recommend an algorithm and implementation (preferably in Python) that fits these criteria? Libraries I've looked at so far include: Orange (Mostly academic. Implementations not terribly efficient or practical.) NLTK (Also academic, although has a good Maxent implementation, but doesn't handle continuous features.) Weka (Still researching this. Seems to support a broad range of algorithms, but has poor documentation, so it's unclear what each implementation supports.)

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• Idiomatic way to do list/dict in Cython?

  - by ramanujan

  My problem: I've found that processing large data sets with raw C++ using the STL map and vector can often be considerably faster (and with lower memory footprint) than using Cython. I figure that part of this speed penalty is due to using Python lists and dicts, and that there might be some tricks to use less encumbered data structures in Cython. For example, this page (http://wiki.cython.org/tutorials/numpy) shows how to make numpy arrays very fast in Cython by predefining the size and types of the ND array. Question: Is there any way to do something similar with lists/dicts, e.g. by stating roughly how many elements or (key,value) pairs you expect to have in them? That is, is there an idiomatic way to convert lists/dicts to (fast) data structures in Cython? If not I guess I'll just have to write it in C++ and wrap in a Cython import.

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• How to translate small bash code to csh / tcsh (setting GNOME terminal title)

  - by user1069609

  I need help to translate the following bash code to tcsh : case $TERM in (xterm*) PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}\007"' ;; esac It is part of my .bashrc on all the machines which have bash as login shell. The code sets the GNOME terminal title to user@somehost (obviously with the real user name and host name). However some hosts have tcsh as login shell, so I need to translate the code into tcsh and add it to the .tcshrc . I considered to somehow source another file with the bash code from inside the .tcshrc file, but I couldn't make it work.

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• ER Diagram flaws

  - by spacker_lechuck

  I have the following ER Diagram for a bank database - customers may have several accounts, accounts may be held jointly by several customers, and each customer is associated with an account set and accounts are members of one or more account sets. What design rules are violated? What modifications should be made and why? So far, a few flaws I'm not sure about are: 1) Redundant owner-address attribute in AcctSets Entity. 2) This ER does not include accounts with multiple owners with different addresses. My Question is: How would I go about fixing these flaws and/or other flaws that I may be missing from my analysis? Thanks!

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• Firing trigger for bulk insert

  - by Deepa

  ALTER TRIGGER [dbo].[TR_O_SALESMAN_INS] ON [dbo].[O_SALESMAN] AFTER INSERT AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; -- Insert statements for trigger here DECLARE @SLSMAN_CD NVARCHAR(20) DECLARE @SLSMAN_NAME NVARCHAR(20) SELECT @SLSMAN_CD = SLSMAN_CD,@SLSMAN_NAME=SLSMAN_NAME FROM INSERTED IF NOT EXISTS(SELECT * FROM O_SALESMAN_USER WHERE SLSMAN_CD = @SLSMAN_CD) BEGIN INSERT INTO O_SALESMAN_USER(SLSMAN_CD, PASSWORD, USER_CD) VALUES(@SLSMAN_CD, @SLSMAN_CD,@SLSMAN_NAME ) END END This is the trigger written for a table(O_SALESMAN) to fetch few columns from it and insert it into one another table(O_SALESMAN_USER). Presently bulk data is getting inserted into O_SALESMAN table through a stored procedure, where as the trigger is getting fired only once and O_SALESMAN_USER is having only one record inserted each time whenever the stored procedure is being executed,i want trigger to run after each and every record that gets inserted into O_SALESMAN such that both tables should have same count which is not happening..so please let me know what can be modified in this Trigger to achieve the same....

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