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• How to paint background of specific range of text in NSTextView

  - by Rui Pacheco

  Hi, This is not a specific bug, its more about not knowing how to do something. I've an NSTextView and I need to paint the background of specific ranges of text when the user clicks on a specific part of the text view. I've tried this but I just get erratic behaviour in the sense that sometimes text loses the foreground color or the background doesn't span the whole range: NSLayoutManager *layoutManager = [myTextView layoutManager]; [layoutManager removeTemporaryAttribute:NSBackgroundColorAttributeName forCharacterRange:range]; [[myTextView layoutManager] setTemporaryAttributes:attributes forCharacterRange:range]; For the sake of simplicity assume that range is always a valid string (it is in my testing environment).

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• What happens when you run out of ram with mlockall set?

  - by James Dean

  I am working on a C++ application that requires a large amounts of memory for a batch run. ( 20gb) Some of my customers are running into memory limits where sometimes the OS starts swapping and the total run time doubles or worse. I have read that I can use the mlockall to keep the process from being swapped out. What would happen when the process memory requirements approaches or exceeds the the available physical memory in this way? I guess the answer might be OS specific so please list the OS in your answer.

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• Collaborative Filtering Program: What to do for a Pearson Score When There Isn't Enough Data

  - by Mike

  I'm building a recommendation engine using collaborative filtering. For similarity scores, I use a Pearson correlation. This is great most of the time, but sometimes I have users that only share a 1 or 2 fields. For example: User 1{ a: 4 b: 2 } User 2{ a: 4 b: 3 } Since this is only 2 data points, a Pearson correlation would always be 1 (a straight line or perfect correlation). This obviously isn't what I want, so what value should I use instead? I could just throw away all instances like this (give a correlation of 0), but my data is really sparse right now and I don't want to lose anything. Is there any similarity score I could use that would fit in with the rest of my similarity scores (all Pearson)?

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• vim command to restructure/force text to 80 columns

  - by wickedchicken

  I know there are ways to automatically set the width of text in vim using set textwidth (like http://stackoverflow.com/questions/235439/vim-80-column-layout-concerns). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining lines or deleting/adding text it comes out poorly wrapped. Ideally, this command would completely reorganize the lines I select and chop off long lines while adding to short ones. An example: long line is long! short After running the command (assuming the wrap was 13 cols): long line is long! short If this isn't possible with a true vim command, perhaps there is a command-line program which does this that I can pipe the input to?

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• Avoiding Mixup of Language Details

  - by DarenW

  Today someone asked me what was wrong with their source code. It was obvious. "Use double equals in place of that single equal in that if statement. Um, i think..." As i remember some languages actually take a single equals for comparison. Since i sometimes forget or mix up the syntax details among the several languages i use, i stepped over to my laptop to try a quickie experiment... It costs a bit of time and is a break in the flow to try "quick" experiments (though maybe the practice is good for memory.) What tips do you have for keeping straight in your mind the syntax (and other) details of multiple languages? (And nowadays, this applies just as well to the many wiki-like markups!)

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• How to use genstrings across multiple directories?

  - by mystify

  I have an directory, which has a lot of subdirectories. those subdirs sometimes even have subdirs. there are source files inside. How could I use genstrings to go across all these dirs and subdirs? Let's say I cd to my root dir in Terminal, and then I would type this: genstrings -o en.lproj *.m How could I tell it now to look into all these directories? Or would I have to add a lot of relative paths comma separated? how?

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• Latex: reset font style

  - by watain

  Is there a way I can reset the style of a certain character sequence? I'm using the listings package to display source code and the prebreak property to display a escape character \ to indicate that the current lines was broken. The problem is that sometimes the backslash is colored because of the syntax highlighting used. So I need basically something like a resetstyle statement, as in the following imaginary example: \textbf{Some bold text \resetstyle{not bold, no color} foo bar} EDIT: Here are the settings that I'm using via lstset: \lstset{ extendedchars = \true, inputencoding = utf8, basicstyle = \scriptsize\ttfamily, breaklines = true, breakindent = 10pt, breakatwhitespace = true, breakautoindent = true, prebreak = \\, frame = leftline, showtabs = true, numbers = left, stepnumber = 2, numberstyle = \footnotesize, numbersep = 10pt, keywordstyle = \color[RGB]{0,0,255}, commentstyle = \itshape\color[RGB]{120,120,120}, stringstyle = \color[rgb]{0.627,0.126,0.941}, emphstyle = {[0]\color[RGB]{236,0,168}}, emphstyle = {[1]\color[RGB]{34,139,34}\underbar}, emphstyle = {[2]\textbf} }

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• NSURLConnection on simulator and iphone performance issues

  - by Nava Carmon

  I'm experiencing a weird problem and i wonder if anybody else has noticed this: I'm using NSURLConnection as it appears in apple's examples to get xml files from a certain server - pretty straight forward. And most of time it works, but sometimes it's just stuck after initialing and don't get into connection's delegate methods. I'm working with WiFi & 3G and the same server all the time. When it comes to didFailWithError i see that mostly it was a timeout error. When I enter same link in Safari it takes a second to bring data. And after another trial I can access the link. What might be the reason for such a weird behavior? How can I improve it? What is the role of cache policy with NSURLConnection? Thanks, Nava

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• How to parse strings representing xml.dom.minidom nodes in python?

  - by Francis Davey

  I have a collection of nodes xml.dom.Node objects created using xml.dom.minidom. I store them (individually) in a database by converting them to a string using the toxml() method of a the Node object. The problem is that I'd sometimes like to be able to convert them back to the appropriate Node object using a parser of some kind. As far as I can see the various libraries shipped with python use Expat which won't parse a string like '' or indeed anything which is not a correct xml string. So, does anyone have any ideas? I realise I could pickle the nodes in some way and then unpickle them, but that feels unpleasant and I'd much rather be storing in a form I can read for maintenance purposes. Surely there is something that will do this?

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• Sorting List which has object that contains two string members that contains numbers

  - by Lemo

  I want to know the best solution for this my case here is that i am taking values from Excel sheet and pushing them to database field, sometimes that field might contain some strings (thats why I cant make my object members int / double) In my class below size is the variable responsible for showing size of files in bytes public class dataNameValue { public string Name { get; set; } public string Count { get; set; } public string Size { get; set; } } I wanted to sort the list by file Size something like List mylist = new List(); mylist = mylist.OrderByDescending(i = i.Size).ToList(); The problem is that if i sorted it without converting it to "int/double" first -- its not giving right results

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• Can I align the text in a C# balloon tip ?

  - by John

  Hello, I wrote a little C# program that displays text in a balloon tip from time to time. When the text is in English, there's no problem : Everything is aligned to the left and is readable, but sometimes I have some Hebrew text and a left alignment of a RTL language gets all screwy. I was wondering if there's a way to right-align the Hebrew text ? Google pointed me to articles that can help me change the balloon color and font, but none of them have an alignment argument. Is it even possible ? Any help will be appropriated. John

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• merging two duplicate contacts/ColdFusion

  - by jil

  having to do with data integrity - I maintain a coldfusion database at a small shop that keeps addresses of different contacts. These contacts sometimes contain notes in them. When you are merging two duplicate contacts, one may be created in 2002 and one in 2008. If the contact in 2002 has notes prior to 2008, my question would be does it matter if you merge these contacts and keep the 2008 contact's ID number? Would that affect the data integrity or create any sort of issues with the notes earlier than 2008? I hope I've accurately described my scenario, as I am not familiar with the proper technical terms. I really appreciate the help sir!

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• Recommended build system for latex?

  - by Paul Biggar

  I'm trying to figure out the best build system for latex. Currently, I use latex-makefile, editing in vim, and viewing changes in Okular or gv. The major problem is that it sometimes gets hides errors on me, and I have to run latex manually. The major advantages are that it does all the iteration I need, and offers both pdf and ps simply. If you have experience with latex-mk vim-latex kile lyx miktex latex-makefile the ultimate latex makefile rubber any others I havent come across Would you recommend them, and why/why not?

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• [Cocoa] NSTask string encoding problem

  - by ryyst

  Hi, In my program, I'm grep-ing via NSTask. For some reason, sometimes I would get no results (even though the code was apparently the same as the command run from the CLI which worked just fine), so I checked through my code and found, in Apple's documentation, that when adding arguments to an NSTask object, "the NSTask object converts both path and the strings in arguments to appropriate C-style strings (using fileSystemRepresentation) before passing them to the task via argv[]" (snip). The problem is that I might grep terms like "Río Gallegos". Sadly (as I checked with fileSystemRepresentation), that undergoes the conversion and turns out to be "RiÃÅo Gallegos". How can I solve this? -- Ry

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• Pipe less to emacs

  - by Steve

  When viewing piped output to Less, sometimes I'd like to be able to view it in Emacs in order to get syntax highlighting and use emacs commands for searching, marking, copying, etc. I see that Less has a v command that can be used to open the currently viewed file in $EDITOR. Unfortunately this doesn't work when viewing piped input. Also, I don't know how to get Emacs to display stdin as a read-only document. So, is it possible to set up Less with something like v but that pumps the current buffer into Emacs as a read-only file? Thanks.

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• Cannot see changes made to aspx

  - by Senica Gonzalez

  I'm trying to edit an aspx page...mainly javascript, and I randomly see changes that I've made when refreshing. I'm using jquery, but I'm not sure that jquery is the culprit here. For example. If I add a simple alert("hello"); in the page I'm calling, I do not see it take place until I have cleared all my temp files and cache, closed my browser opened back up...and even then, sometimes, I still don't see my changes. Any ideas?

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• non blocking tcp connect with epoll

  - by doccarcass

  My linux application is performing non-blocking TCP connect syscall and then use epoll_wait to detect three way handshake completion. Sometimes epoll_wait returns with both POLLOUT & POLLERR revents set for the same socket descriptor. I would like to understand what's going on at TCP level. I'm not able to reproduce it on demand. My guess is that between two calls to epoll_wait inside my event loop we had a SYN+ACK/ACK/FIN sequence but again I'm not able to reproduce it. Any clue ? Regards, Seb

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• "The breakpoint will not currently be hit. The source code is different from the original version."

  - by David

  Hi everyone I'm really hoping someone can help me out with this one. When debugging in Visual Studio, sometimes I add a breakpoint but it's hollow and VS says "The breakpoint will not currently be hit. The source code is different from the original version." Obviously this prevents me being able to debug. What on earth does the message mean? What original version? If I've just opened up the solution and not made any changes whatsoever to the code, how can there be an 'original version'? The appearance of this problem just seems totally arbitrary. It's just Visual Studio going 'Na na na na na, I'm not going to debug for you today'. Can anyone give any advice? Ta David

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• jquery load method

  - by cognos79

  I am using mscaptcha image and trying to only reload the captcha image on button click. Seems like the captcha image is being loaded twice sometimes. <script type="text/javascript"> $(document).ready(function() { $('#btnSubmit').click(function() { $('#dvCaptcha').load('default.aspx #dvCaptcha'); }); }); </script> <div id="btnDiv"> <asp:Button ID="btnSubmit" runat="server" Text="Submit" /> </div> <div id="dvCaptcha"> <cc1:CaptchaControl ID="ccJoin" runat="server" CaptchaBackgroundNoise="none" CaptchaLength="5" CaptchaHeight="60" CaptchaWidth="200" CaptchaLineNoise="None" CaptchaMinTimeout="5" CaptchaMaxTimeout="240" /> </div> Any ideas?

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• REST, caching, and authorizing with multiple user roles

  - by keithjgrant

  We have a system with multiple different levels of access--sometimes even for the same user as they switch between multiple roles. We're beginning a discussion on moving over to a RESTful implementation of things. I'm just starting to get my feet wet with the whole REST thing. So how do I go about limiting access to the correct records when they access a resource, particularly when taking caching into consideration? If user A access example.com/employees they would receive a different response than user B; user A may even receive a different response as he switches to a different role. To help facilitate caching, should the id of the role be somehow incorporated into the uri? Maybe something like example.com/employees/123 (which violates the rules of REST), or as some sort of subordinate resource like example.com/employees/role/123 (which seems silly, since role/### is going to be appended to URIs all over the place). I can help but think I'm missing something here.

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• python foursquare - SSL3 certificate verify failed

  - by user1814277

  I'm trying to make a userless request to the Foursquare API using Mike Lewis' Python wrapper - https://github.com/mLewisLogic/foursquare: client = foursquare.Foursquare(client_id=Client_ID, client_secret=Client_Secret) categs = client.venues.categories() Intermittently, I get a "Error connecting to Foursquare API" msg. Running a logger to catch a more detailed message produces: "SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed" This didn't use to happen and occurs both on my local Windows development machine and on a server running ubuntu. Am I missing something basic here about security certificates? The problem is intermittent and sometimes just leaving it a minute and retrying fixes the problem temporarily. I've downloaded the latest 20120716 version of the wrapper although in the code for init.py it still says API_VERSION = '20120608'. I'm using Python 2.73 and have also signed up for the Foursquare API key, using the id and secret in the above code. I listed the urls, using my local IP:8000 and tried using separate keys for the local and dev machines but this seems to make no difference. Help much appreciated. Thanks.

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• Who pays developers of open-source software?

  - by darko petreski

  We are facing a lot of open source software. But someone needs to write that software. How are they payed? Do you know a good article about the open source politics and economy? Sometimes the big companies themselves release open source because they have some benefits. Then they sell support, advices ... My question is what is the real economy about open software? No professional will work for nothing. This software are couple of classes but thousand or may be millions of classes. If you are really a pro you will write software for money, because you have life, wife, kids, taxes, you must earn. Please do not tell me that they are doing this for pleasure or hobby!

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• TCP echo server

  - by khera-satinder

  I have written a code for TCP echo server code in C i.e. whatever I receive I have to send it back. I am also successful in doing so but I am facing a problem. Sometimes the packets that are received are not echoed back. For this I have introduced a delay after receiving and the no. of failures reduced but the problem still exists. Can someone suggest something? Later on I would like to run two server applications simultaneously on two different ports. Regards, Satinder Singh

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• PHP set timeout for script, set_time_limit not working

  - by tehalive

  I have a command-line PHP script that runs a wget request using each member of an array with foreach. This wget request can sometimes take a long time so I want to be able to set a timeout for killing the script if it goes past 15 seconds for example. I have PHP safemode disabled and tried set_time_limit(15) early in the script, however it continues indefinitely. I've given up troubleshooting set_time_limit() and was trying to find other ways to kill the script after 15 seconds of execution. However, I'm not sure if it's possible to check the time a script has been running while it's in the middle of a wget request at the same time (a do while loop did not work). Thanks for any tips!

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• Center the stage in Flash CS4/AS3 on a standalone player

  - by Technoh

  I have a Flash presentation (made in Flash CS4 with AS3) I am working on and running in a standalone Flash player. When I start the presentation the stage is centered in the Flash player, even if I resize it. The presentation contains an FLVPlayback component which, at different frames, plays different content. A navigation menu (made of buttons) is used to move through the different frames. My problem is that if the player is resized so that it is bigger than the stage, sometimes after going into and exiting from fullScreen mode, the stage is moved to the left and I cannot find a way to move it back to the center. I cannot stage the scale as the content becomes distorted and I do not want to force fullScreen all the time. I would just like to center the stage in the Flash player. Is such a thing possible? Any help is greatly appreciated.

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