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• How to track value of a variable in Eclipse Java Debugger

  - by aveschini

  I would like to track the value of a boolean (not Boolean) variable in the Eclips debugger. I need to know when it does change and, for this, i need to track it's value through all the execution; not only when it is in scope. More particularly i have a class (let's call it myClass) with a boolean member variable called isAvailable. My program instantiate 4 or 5 myClass objects. I am expecting that at the end of the execution the isAvailable value of all of my objects is set to true. Contrarily to my excpectation one of myClass objects has isAvailable set to false. I need to know which (in a lot of) methods is setting isAvailable to false.

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• Implementation of a distance matrix of a binary tree that is given in the adjacency-list representation

  - by Denise Giubilei

  Given this problem I need an O(n²) implementation of this algorithm: "Let v be an arbitrary leaf in a binary tree T, and w be the only vertex connected to v. If we remove v, we are left with a smaller tree T'. The distance between v and any vertex u in T' is 1 plus the distance between w and u." This is a problem and solution of a Manber's exercise (Exercise 5.12 from U. Manber, Algorithms: A Creative Approach, Addison-Wesley (1989).). The thing is that I can't deal properly with the adjacency-list representation so that the implementation of this algorithm results in a real O(n²) complexity. Any ideas of how the implementation should be? Thanks.

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• Top 3 Max entries for a Combination which a condition

  - by Asharmb

  I am new to sql side. so if this questoin sound very easy then please spare me. I have a 4 coloumns in a sql table.Let say A,B,C,D . For any BC combination I may get any number of rows. I need to get at max 3 rows (which inturn give me 3 unique value of A for that BC ombination) for these selected rows i should have Top 3 Max value of D. As compare to other entries for that BC combination. So there can be any number of BC combination so the above logic should imply to all of them.

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• how to create a theme with QT

  - by Moayyad Yaghi

  hello im looking for a way to make my pyqt interface look nicer by adding a theme to it. im new to Qt and i still have no idea how to add a custom theme for widgets.. so how is that possible ? and is it possible through qt designer ? sorry for my bad english , its my third language. i hope the idea is clear enough . please let me know if something was unclear .. thanks in advace

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• NHibernate: how to do lookup a specific date

  - by Daoming Yang

  How I can lookup a specific date in Nhibernate? I'm currently using this to lookup one day's order. ICriteria criteria = SessionManager.CurrentSession.CreateCriteria(typeof(Order)) .Add(Expression.Between("DateCreated", date.Date.AddDays(-1), date.Date.AddDays(1))) .AddOrder(NHibernate.Criterion.Order.Desc("OrderID")); I tried the following code, but they did bring the data for me. Expression.Eq("DateCreated", date) Expression.Like("DateCreated", date) Note: The pass in date value will be like this 2010-04-03 00:00:00, The actual date value in the database will be like this 2010-03-13 11:17:16.000 Can anyone let me know how to do this? Many thanks.

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• Ordered List (ol) showing up un-numbered?

  - by Abs

  Hello all, I have an ordered list (ol) on my page but the numbering is not showing up at all! I have done this: <ol> <li>my text</li> <li>my text</li> <li>my text</li> </ol> As I have typed the above, stackoverflow was able to render it correctly the way I wanted it to, like so: my text my text my text However, this is not happening on my webpage. I am viewing this in Firefox on my localhost. If any knows why my ol's look like ul's (i.e. no numbering) I would be grateful for help. If not, please let me know how I can achieve a numbered list using ul's. Thanks all

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• vba excel copy subtable from sheet to sheet

  - by user429400

  I realize that this is probably a duplicate, but I've been searching for an hour and I can't to get the syntax right. I have a sheet with several tables. There is at least one empty column and one empty row between one table to the other. I know the start row and start column of each table, and I know that each table has 3 columns. I don't know how many rows it has. I want to write a sub that receives: table start row table start column and copies the table into another sheet (let's say that the destination is sheet2 starting at A1). I know I can do it with a loop, but I suspect there is a better syntax right? (The main issue here is that I need to find the number of rows each table has) Thanks. Li

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• LuaInterface - how to register overloaded methods?

  - by JeffreySadeli

  Hello world! I'm trying to integrate Lua to my C# app when I hit a little snag. I was hoping someone with more expertise could help point me to the right direction. Let's say I have the following C# methods: public void MyMethod(int foo) { ... } public void MyMethod(int foo, int bar) { ... } I would like to register it to my Lua script environment so that I can do something like this: -- call method with one param MyMethod(123) -- call method with two params MyMethod(123, 456) I tried RegisterFunction("MyMethod", this, this.GetType().GetMethod("MyMethod")) but it reasonably complains about ambiguous match. Any ideas?

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• What garbage collection algorithms do all 5 major browsers use?

  - by Martin Wittemann

  I am currently rethinking the object dispose handling of the qooxdoo JavaScript framework. Have a look at the following diagram (A is currently in scope): Let's say we want to delete B. Generally, we cut all reference between all objects. This means we cut connection 1 to 5 in the example. Is this really necessary? As far as I have read hear 1, browsers use the mark-and-sweep algorithm. In that case, we just need to cut reference 1 (connection to the scope) and 5 (connection to the DOM) which could be much faster. But can I be sure that all browsers use the mark-and-sweep algorithm or something similar? 1 http://stackoverflow.com/questions/864516/what-is-javascript-garbage-collection

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• 128bit hash comparison with SSE

  - by fokenrute

  Hi, In my current project, I have to compare 128bit values (actually md5 hashes) and I thought it would be possible to accelerate the comparison by using SSE instructions. My problem is that I can't manage to find good documentation on SSE instructions; I'm searching for a 128bit integer comparison instruction that let me know if one hash is larger, smaller or equal to another. Does such an instruction exists? PS: The targeted machines are x86_64 servers with SSE2 instructions; I'm also interested in a NEON instruction for the same job.

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• Optimizing a fluid grid layout

  - by user1815176

  I recently just added a grid layout, but I can't figure out how to make my links work. The grid that I used is the 1140 one at http://cssgrid.net/. I studied the source code of that website, and tried to make my page like theirs, but when I put everything in it made mine worse, and the grid didn't even work. This is how my website is supposed to look http://spencedesign.netau.net/singaporehome.html and this is how it does http://spencedesign.netau.net/home.html And when you reduce the size, it doesn't look like it's supposed to. When you minimize it I want the pictures(links) to be two per row, then one per row depending on how small the page is. I also want the quote to turn into different rows when it is too small for it. But I can't figure out how to make the page look normal regularly let alone make it look good with a smaller browser. Thanks!

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• C++ boost ublas + units dimension constraints

  - by aaa

  hello. I am seeking advice on design/general idea on how to force matrix dimension constraints on ublas matrix/vector possibly using boost units. For example, let matrix A have dimensions of time x force (for example) // does not have dimensions, time x force and force x time are not distinguished. matrix<double> A; //something like? dimension<time, force, matrix<double> > A; dimension<force, time, matrix<double> > B = trans(A); have you done something like this or do you have some good idea about how to organize such constraints? Thank you

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• How to point to other table's ID with hibernate?

  - by Wilhelm

  The problem: let's say I have two tables Client, and Product, in which Client has its primary key and a column called products (that points to pk's in Product table)... ok, if I need products to point only one row, it's nice, but if I need it to point for... 1000 rows in Product table, the products column would have to be larger enought... but I can't predict this situation. So, how could I design my table and how would I use hibernate with it, to achieve that "pointing" in a optmized and maybe "easy" way. NOTE: I excluded some columns of the "design" presented here, just to keep the simplicity.

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• How to scan for available networks for Blackberry device from application?

  - by amsiddh

  Hi All, Is there any RIM API available which will help to get the list of available network service or only Wi-Fi networks for a device and set selected network access point for any network communications? Is it possible programmatically to disable the Mobile networks like GPRS, WAP, etc? For Ex: When a application is started it should scan for WiFi connections (even if there are no previous WiFi network access points are set on device) and list the available WiFi connection. Then user will select the appropriate WiFi connection to connect for any network communication. Outside the application any internet communication (like browser or any other application) should done through same selected WiFi connection. The scanning for WiFi and setting the connection is almost similar to Blackberry WiFi Setup. If anyone know how to implement this using available RIM API and let me know its possible or not. Please share if anyone have any code snippet related to this. I am looking for OS v4.5, 4.7, and 5.0. Thanks, siddh.

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• iPhone: Grouping records in multiple UITableView views

  - by Nic Hubbard

  Let me first say, I know how to create sections and group records within a UITableView. What I am wanting to do is something similar to creating a photo album. So, I have all my data objects coming from core data, and, I want to be able to create a custom group, such as "My Trip to Mexico" and "First Birthday". Then, the user should be able to add objects/records into new sections/albums. So, basically the user is creating custom sections with their own custom names, and then choosing what records should go into that section/album. So, I am just wondering what is the best way to do this? I am thinking that I would just create some extra attributes for my core data model. Or, would I create a whole new "Album Section" object, and somehow use that? Point me in the right direction. :)

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• XML XHR Request resultin in 0 stauts and empty response text.

  - by deepak

  I had another post for the same problem... I think I put the question in a wrong way.. Let me give more details: i have test.html in my c:\ drive and I have a local webserver runnin in qt, and i have some plugin written to that webserver which will get the request and send some response text "hello". in test.html i m making a xml xhr request which will make a GET request like localhost:8080/test which will return the text "hello" by that plugin. Now if I directly open test.html from C:\ it doesnt work, i mean i get response 4 and status 0, and response text nothing.. but the request is passing through webserver and plugin It works fine, when the test.html is put in the webserver pages directory.

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• How to learn Ruby on Rails as a complete Programming Beginner?

  - by Alex

  I want to build a scalable dynamic Web Application. I have never programmed an Object Oriented language before. Or, let's just say I am completely new to programming, because the previous experiences aren't worth talking about. I know I have a really big task ahead of me ^^ but I wanted to get into coding for the last 10 years and now that I'm finally doing it, I would like to know how to get there in the most efficient way. Any good books/tutorials you could recommend? Would it really make sense to learn other, better documented languages before learning RoR? Or would it be better for a beginner to learn C# with ASP.NET first? Thank you for your help in advance ;-)

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• Multiple Input From Keyboard C# WPF

  - by Alex

  I am writing a Tetris clone in WPF. If I hold down the right arrow key, the current piece shifts right. For playability, I want to allow the user to press another key (i.e. F-key) and rotate the moving piece without having to let go of the right arrow key first. Currently when I do this, the piece stops shifting. My first basic attempt at this was hooking into Window_PreviewKeyDown(object sender, KeyEventArgs e) and then sending a message to the controller layer. How do I structure my input-listening code to allow this? My current code Here

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• How can Excel 2007 / 2010 consume a REST web service?

  - by jallen

  What options exist to consume a REST web service from within Excel 2007 / 2010? I can use XML Maps to consume a basic XML list, but that doesn't let me build a dynamic URL (so I could include parameters). For example, I can add an XML Map to Excel for http://machine/service/level/5 and display the values in the workbook just fine - no problem there. The real question is, how can I dynamically change the /5 part of the URL to come from another cell in excel? That way I can have a couple of cells that have the options (what ID, what name, etc.) and whenever those values change (ideally) a new dynamic URL would be constructed and the XML map would be refreshed. Is such a thing possible? Does anyone else have a better way to take some parameters, call a web service (REST or SOAP, I'm not picky) and shove the results back into excel for further manipulation?

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• How can I tell Visual Studio to NOT BREAK on a particular exception?

  - by Noel Kennedy

  I have a particular type of exception that I would like Visual Studio to not catch with the Exception Assistant. Essentially I would like it just to let my normal exception handling infrastructure deal with it. The exception is an inheritor of System.Exception which I wrote and have the source code for. Any where this is thrown I want VS to not catch it, ie it is not useful to just supress a single throw new BlahException(); in code. This is because the exception is thrown a lot, and I don't want to have to supress every single instance individually. In case it makes a difference I am on Visual Studio 2010 Ultimate, Framework 3.5 SP1.

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• associating a filetype with a batch script, and getting parameters passed to file of that type.

  - by Carson Myers

  Sorry for the cryptic title. I have associated python scripts with a batch file that looks like this: python %* I did this because on my machine, python is installed at C:\python26 and I prefer not to reinstall it (for some reason, it won't let me add a file association to the python interpreter. I can copy the executable to Program Files and it works -- but nothing out of Program Files seems to work). Anyways, I can do this, so far: C:\py django-admin C:\py python "C:\python26\Lib\site-packages\django\bin\django-admin.py" Type 'django-admin.py help' for usage. C:\py django-admin startproject myProj C:\py python "C:\python26\Lib\site-packages\django\bin\django-admin.py" Type 'django-admin.py help' for usage. but the additional parameters don't get passed along to the batch script. This is getting very annoying, all I want to do is run python scripts :) How can I grab the rest of the parameters in this situation?

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• Trying to find a good javascript function for hmac-sha1

  - by Darxval

  So i have been searching the web for a javascript source for an Hmac-sha1 algorithm. I saw Crypto's but i cant seem to get it to work, mainly because it has no idea what crypto means. (i copied the .js script functions into my script file) http://code.google.com/p/crypto-js/ I have my base64 encoded function already. that i got from here: http://nerds-central.blogspot.com/2007/01/fast-scalable-javascript-and-vbscript.html btw this for a twitter application using the new OAuth system. any help or links to where i can find anything on this would be helpful If you need me to elaborate let me know. thank you!

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• mysql conditional query - complicated!

  - by emre

  i want to get distinct values for a field, let say: field1... ok this needs a query like: "select distint(field1) from table" however for some records, field1 is empty and there is another column that is an alternative to field1, which is field2. now; for the records where field1 is empty i need to use the value of field2. i think i need sort of a conditional select statement with if control something like: "select distinct( (if(field1!='') field1 else field2) ) from table" but i have no idea on how to write it. any help is appricated...

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• Grails unit testing domain classes with Set properties - is this safe?

  - by Ali G

  I've created a domain class in Grails like this: class MyObject { static hasMany = [tags: String] // Have to declare this here, as nullable constraint does not seem to be honoured Set tags = new HashSet() static constraints = { tags(nullable: false) } } Writing unit tests to check the size and content of the MyObject.tags property, I found I had to do the following: assertLength(x, myObject.tags as Object[]) assertEquals(new HashSet([...]), myObject.tags) To make the syntax nicer for writing the tests, I implemented the following methods: void assertEquals(List expected, Set actual) { assertEquals(new HashSet(expected), actual) } void assertLength(int expected, Set set) { assertLength(expected, set as Object[]) } I can now call the assertLength() and assertEquals() methods directly on an instance of Set, e.g. assertLength(x, myObject.tags) assertEquals([...], myObject.tags) I'm new to Groovy and Grails, so unaware how dangerous method overloading like this is. Is it safe? If so, I'm slightly* surprised that these methods (or similar) aren't already available - please let me know if they are. * I can see how these methods could also introduce ambiguity if people weren't expecting them. E.g. assertLength(1, set) always passes, no matter what the content of set

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• jQuery - Change background of input field if text getting replaced

  - by ywickham

  I'm currently using jQuery to restrict a text box to number only input as follows: $('input.numbersOnly').keyup(function () { this.value = this.value.replace(/[^0-9\.]/g,''); }); I'd like to let the user know that what they are typing is being rejected by changing the background color of the field. I know that I can change the background of a field using something like this: $('input.numbersOnly').addClass('alertClass'); My question is, how do I combine the two code examples above so that the color of the field changes as the character is getting replaced? My goal is to alert the user that something is wrong with their input as they type it in the field. Thanks!

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