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• Normalising book titles - Python

  - by RadiantHex

  Hi folks, I have a list of books titles: "The Hobbit: 70th Anniversary Edition" "The Hobbit" "The Hobbit (Illustrated/Collector Edition)[There and Back Again]" "The Hobbit: or, There and Back Again" "The Hobbit: Gift Pack" and so on... I thought that if I normalised the titles somehow, it would be easier to implement an automated way to know what book each edition is referring to. normalised = ''.join([char for char in title if char in (string.ascii_letters + string.digits)]) or normalised = '' for char in title: if char in ':/()|': break normalised += char return normalised But obviously they are not working as intended, as titles can contain special characters and editions can basically have very different title layouts. Help would be very much appreciated! Thanks :)

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• Stringification of a macro value

  - by SF.

  I faced a problem - I need to use a macro value both as string and as integer. #define RECORDS_PER_PAGE 10 /*... */ #define REQUEST_RECORDS \ "SELECT Fields FROM Table WHERE Conditions" \ " OFFSET %d * " #RECORDS_PER_PAGE \ " LIMIT " #RECORDS_PER_PAGE ";" char result_buffer[RECORDS_PER_PAGE][MAX_RECORD_LEN]; /* ...and some more uses of RECORDS_PER_PAGE, elsewhere... */ This fails with a message about "stray #", and even if it worked, I guess I'd get the macro names stringified, not the values. Of course I can feed the values to the final method ( "LIMIT %d ", page*RECORDS_PER_PAGE ) but it's neither pretty nor efficient. It's times like this when I wish the preprocessor didn't treat strings in a special way and would process their content just like normal code. For now, I cludged it with #define RECORDS_PER_PAGE_TXT "10" but understandably, I'm not happy about it. How to get it right?

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• Getting the last element of a Postgres array, declaratively

  - by Wojciech Kaczmarek

  How to obtain the last element of the array in Postgres? I need to do it declaratively as I want to use it as a ORDER BY criteria. I wouldn't want to create a special PGSQL function for it, the less changes to the database the better in this case. In fact, what I want to do is to sort by the last word of a specific column containing multiple words. Changing the model is not an option here. In other words, I want to push Ruby's sort_by {|x| x.split[-1]} into the database level. I can split a value into array of words with Postgres string_to_array or regexp_split_to_array functions, then how to get its last element?

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• WPF: how to make normal listbox left-drag-select behavior use middle mouse instead?

  - by Scott Bilas

  I'm building a special listbox control that our designers want customized in some tweaky ways. One thing they want to see is that the middle button-drag does what the left button-drag normally does (we are repurposing left-drag to other things). So it needs the two key features that left-drag does in a ListBox default implementation: While holding down the button and dragging, the selection starts where I click down and extends to where I drag. While dragging outside the listbox region, it scrolls if there is scrollable space in that direction. Before I go an duplicate this functionality by hand, is there any easy way to fool ListBox into thinking it's getting left-mouse drag events but instead is getting middle-mouse?

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• Inline Zend Navigation links in view content saved to db

  - by takeshin

  I'm storing the page content in the database (both as markup and HTML code) and displaying this content in the view (let's say it's CMS or forum post). The this data have also some links to internal pages existing in sitemap (Zend_Navigation object). It's easy to insert the link in page body just by using <a> tag. But the contents of this inline links does not change when I update the sorce XML for Zend Navigation (url's, attributes, ACL permissions). How do you handle this case? Special markup for the link, converting the link using url view helper? Iterate Zend_Navigation object extracting specific link (one by one)?

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• Why is address zero used for null pointer?

  - by Joel

  In C (or C++ for that matter), pointers are special if they have the value zero: I am adviced to set pointers to zero after freeing their memory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid etc. But since memory addressing starts at 0, isn't 0 just as a valid address as any other? How can 0 be used for handling null pointers if that is the case? Why isn't a negative number null instead?

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• How can I replace ” with " in ASP.NET SQL?

  - by vamsivanka

  I am trying to run this SQL from ASP.NET 2005 but am getting an invalid SQL error because it has a weird character ” in it. In my code I am trying to replace ” with " but it is not doing it as the special character in the replace command is changing to ". Query: insert into userquery(description) values ('In fact, Topeka Google Mayor Bill Bunten expressed it best: “Don’t be fooled. Even Google recognizes that all roads lead to Kansas, not just yellow brick ones.”') If I copy and execute this in mysql it is working good. How can I solve this problem?

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• WF - Creating a selective list

  - by Michael Bendtsen

  I have a stupid question. I have created a workflow Designer host where I publish my own activities. I also have a property grid which only displays the properties decorated with a special attribute. This designer is going to be used by none IT staff. What I want is that on an activity the user can select a property value from a list. I know I just could create an Enum but I would like it to be dynamic. I.e. all events on a specific interface (extracted using reflection). Is this at all possible or am I stuck with enums?

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• What technologies to use for a particle system with enormous calculation demand?

  - by Amir Rezaei

  I have a particle system with X particles. Each particle tests for collision with other particles. This gives X*X = X^2 collision tests per frame. For 60f/s, this corresponds to 60*X^2 collision detection per second. What is the best technological approach for these intensive calculations? Should I use F#, C, C++ or C#, or something else? The following are constraints The code is written in C# with the latest XNA Multi-threaded may be considered No special algorithm that tests the collision with the nearest neighbors or that reduces the problem The last constraint may be strange, so let me explain. Regardless constraint 3, given a problem with enormous computational requirement what would be the best approach to solve the problem. An algorithm reduces the problem; still the same algorithm may behave different depending on technology. Consider pros and cons of CLR vs native C.

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• How to start up your .NET program from web browser?

  - by Ole Jak

  Could you provide example of JavaScript function for starting up application installed on your computer from a web browser (eg google chrome 4). It particular if .Net APPs have any special simplifying this process apis of out there are some libs for such staff, please share link with us. so how to create and store in run on start up programs a small local server which would handel some local urls like http://localhost/maAppServer/MyAppCalculator/Start for starting apps that have written in its config file their names and local urls on install? So how to start up your C# .NET app\program from web browser?

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• Drupal removing javascript from Full HTML link

  - by Jen

  I am new to Drupal and am trying to create a node (let's call it child) that will only really be accessed when clicked on from another node (we'll call it parent). When closing the child window, I want to parent window to refresh. Outside of Drupal, that's easy: <a onclick="window.close(); window.opener.location.reload();" href="#">Click to close this window</a> However, when I type this into the body of a node using Full HTML, it still strips the onclick text from my post. How can I include javascript in the body of a node like this? Is there a special module I need. Thanks!

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• grab inspect the parameters to "use" and pass on the rest?

  - by JoelFan

  I have a Perl module and I'd like to be able to pick out the parameters that my my module's user passed in the "use" call. Whichever ones I don't recognize I'd like to pass on. I tried to do this by overriding the "import" method but I'm not having much luck. EDIT: To clarify, as it is, I can use my module like this: use MyModule qw/foo bar/; which will import the foo and bar methods of MyModule. But I want to be able to say: use MyModule qw/foo doSpecialStuff bar/; and look for doSpecialStuff to check if I need to do some special stuff at the beginning of the program, then pass qw/foo bar/ to the Exporter's import

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• Question About Eclipse Java Debugger Conditional Breakpoints Inefficiency

  - by Personman

  I just set a conditional breakpoint in Eclipse's debugger with a mildly inefficient condition by breakpoint standards - checking whether a HashMap's value list (8 elements) contains Double.NaN. This resulted in an extremely noticeable slowdown in performance - after about five minutes, I gave up. Then I copy pasted the condition into an if statement at the exact same line, put a noop in the if, and set a normal breakpoint there. That breakpoint was reached in the expected 20-30 seconds. Is there something special that conditional breakpoints do that is different from this, or is Eclipse's implementation just kinda stupid? It seems like they could fairly easily just do exactly the same thing behind the scenes.

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• Function to identify problematic datatypes

  - by Zach

  I just spent several hours debugging some R code, only to discover that the error was due to an Inf that had sneaked in during my calculations. I had checked for NA, but hadn't thought to check for Inf. I wrote the following function to help prevent this situation in the future: is.bad <- function(x){ is.na(x) | is.nan(x) | is.infinite(x) } > is.bad(c(NA, NaN, Inf, -Inf, 0, 1, 1000, 1e6)) [1] TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE Are there any other special data types in R I should be aware of?

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• Feedly "Login with Google" system

  - by AR

  I'm trying to figure out how Feedly does their login with Google link. Based on the redirect URL it passes I'd think it was a google service, but at the same time, the login page says it's not associated "Note: Google is not affiliated with feedly. Your password will not be shared with the feedly service". Anyone know what exactly powers this? Is it Federated login with some special domain trickery allowing them to upload a site screenshot and description? Or is it something else.

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• Why is '\x' invalid in Python?

  - by Paul McGuire

  I was experimenting with '\' characters, using '\a\b\c...' just to enumerate for myself which characters Python interprets as control characters, and to what. Here's what I found: \a - BELL \b - BACKSPACE \f - FORMFEED \n - LINEFEED \r - RETURN \t - TAB \v - VERTICAL TAB Most of the other characters I tried, '\g', '\s', etc. just evaluate to the 2-character string of a backslash and the given character. I understand this is intentional, and makes sense to me. But '\x' is a problem. When my script reaches this source line: val = "\x" I get: ValueError: invalid \x escape What is so special about '\x'? Why is it treated differently from the other non-escaped characters?

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• Development Applications on big devices vs mobile phones: Similarities/Disimilarities

  - by Richard77

  Hello, I saw a news document on applications running in mobile devices. And, I believe that might be interesting for people where I live (Internet is not developed - but the cellphone networks are much better). So here are my questions: Where can I find documentation for beginners on that matter (And most importantly) Am I gonna be able to take advantage of acquired knowledge in .NET framework (C#, MVC, JQuery, XHTML, ...)? Am I gonna need my laptop or a special device to develop applications? Am I gonna need Visual Studio? And so on... Bref, What are similarities/dissimilarities between developments for applications running in big machines and those running on mobile phones? Thanks for helping

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• How to set full control to a directory??

  - by smwikipedia

  I am using the following simple code to add full control to a directory, but it doesn't work. String dir_name = @"folder_full_path"; DirectorySecurity dir_security = Directory.GetAccessControl(dir_name); FileSystemAccessRule access_rule = new FileSystemAccessRule(@"AccountName", FileSystemRights.FullControl, AccessControlType.Allow); dSecurity.AddAccessRule(access_rule); Directory.SetAccessControl(dir_name, dir_security); But this code only set special permissions to the target folder. This code is almost the same as the MSDN sample. I am scratching my head for a reasonable explanation... Hope someone could shed some light on me. Many thanks.

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• Reading Connection String from a class Library

  - by devnet247

  Hi all I have a .net class library 2.0 with an app.config with a connectionString section. I have 01 Method that this class library exposes " string GetConnectionString(string name) However even though the app.config in this class library has 3 connstrings it does not read this config.exe.How can I make it read the app.config that resides withing this dll? Again, Usually you will have a web or windows app with a config and it will all work. Mine is a special case I need to read the connectionstring within this class library. How can I do it? thanks a lot

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• Storing a big xml string in a xml document in java

  - by shyam R

  Hi All, I Have a Java object which I am converting into a xml file. I am getting a big xml file here after converting java object. I am capturing that converted xml file in a string like below String ouputXML = xmlfile; Noe If I pring the ouputXML on the console of IBM RSA in the proper format only it is printing but my requirement is I need to redirect outputXML in to an XML instead of printing in IBm RSA console. I am able to do this but the problem is if I open the craetd XML file the xml structure is not proper , it is showing so many special characters . Please help me !!

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• How to temporarily change all default user settings without destroying the original?

  - by mystify

  My app is based strongly on a lot of NSUserDefault keys and values. I want to implement a temporary defaults profile which the user can activate to get a special task done easily. For this, some of the user defaults must be changed temporarily so the app adjusts it's interface appropriately. I started to just manually change those NSUserDefaults settings, but this also destroys the user's original settings. Is it possible to keep a backup of the user's NSUserDefault settings and restore them after the user quits the temporary mode or the app? Like I see it, NSUserDefaults actually is just an NSMutableDictionary which is generated out of a plist file. So I would just make a deep copy of that and later assign that copy somehow back to NSUserDefaults?

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• Comparing Design Patterns

  - by Lijo

  Hi, I am learning design patterns using C#. One of the challenges that I am facing is that they look similar. Could you please help me to distinguish them – basically when to use them? - Why not the other? Bridge and Strategy State and Strategy Façade and Strategy Composite and Strategy I understand that there are lots of resources available in the web. However they does not treat this special question. [Note: I am looking for implementation examples and rationale behind the selection; not mere explanations] It would be great if you are taking examples from any of the following 1) E-Commerce 2) Payroll system 3) Banking 4) Retailing Thanks for your understanding.. Thanks Lijo

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• Do encryption algorithms provide really unique results?

  - by Mikulas Dite

  I was wondering whether md5, sha1 and anothers return unique values. For example, sha1() for test returns a94a8fe5ccb19ba61c4c0873d391e987982fbbd3, which is 40 characters long. So, sha1 for strings larger than 40 chars must be the same (of course it's scrambled, because the given input may contain whitespaces and special chars etc.). Due to this, when we are storing users' passwords, they can enter either their original password or some super-long one, which nobody knows. Is this right, or do these hash algorithms provide really unique results - I'm quite sure it's hardly possible.

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• What is the best software to write and organize written copy / content for a website?

  - by johnqtaxpayer

  I'm a newbie product manager, looking for tips on how to write and organize text copy for my company's website. I need to be able to prepare the content for our public site and turn it over to the web designer who publishes it to our live site. I want our UI team to be able to quickly glance at the copy I write and immediately know where on the page I intend for it to go. Currently, I'm using microsoft word to write and color code different text to signify where I want specific text to go. It is difficult for the UI guy to immediately know if something goes into the nav bar or into a header or a description below a header. In addition to that, it would be helpful for me to be able to write the copy in such a way that the web designer could copy and paste it into the XHTML without having to go back and manually replace special punctuation characters with the XHTML entities. What software is out there that will allow a comprehensive solution to these web copywriting issues?

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• asp.net drop down list viewstate issue after client side Ajax update

  - by DSharper

  In my aspx page I have drop down list that initialy in page load event loads up with list of values which is shown to client(drop down list "A") and in client side, depending on client selecion of another drop down list(drop down list "B") I have written a javascript to update drop down list "A" with corresponding values with Ajax behaviour(without full page postback). But when we post page to the server, in server side page load event shows initialy sent list of values for drop down list "A" but not the values that were loaded by Ajax calls due to ViewState not being updated correctly due to Ajax call. I could fix this easily with update panel but it increased Ajax request size to 44KB which is much higher than what currently is for hand made Ajax script I have written( 0.5KB) Is there special way of fixing this rather than using update panel?

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