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• What Math topics & resources to consider as beginner to indulge the book - Introduction to Algorithm

  - by sector7

  I'm a programmer who's beginning to appreciate the knowledge & usability of Algorithms in my work as I move forward with my skill-set. I don't want to take the short path by learning how to apply algorithms "as-is" but would rather like to know the foundation and fundamentals behind them. For that I need Math, at which I'm pretty "basic". I'm considering getting tuition's for that. What I would like is to have a concise syllabus/set of topics/book which I could hand over to my math tutor to get started. HIGHLY DESIRED: one book. the silver bullet. (fingers crossed!) PS: I've got some leads but want to hear you guys/gurus out: Discrete Math, Combinatorics, Graph theory, Calculus, Linear Algebra, and Number Theory. Looking forward to your answers. Thanks!

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• parse json news feed array android

  - by user1827260

  I have an json feed from bbc in this format { "name": "ticker", "entries": [ { "headline": "text", "prompt": "LATEST", "isBreaking": "false", "mediaType": "Standard", "url": "" }, { "headline": "text", "prompt": "LATEST", "isBreaking": "false", "mediaType": "Standard", "url": "" }, etc........... My code is as follows: ArrayList mylist = new ArrayList(); JSONObject json = JSONfunctions.getJSONfromURL("http:/......"); try{ JSONArray item = json.getJSONArray("entries"); for (int i = 0; i<item.length(); i++) { HashMap<String, String> map = new HashMap<String, String>(); JSONObject e = item.getJSONObject(i); JSONObject title = e.JSONObject("headline"); map.put("title", "Title:" + e.getString("headline"); } It gives me the error "java.lang.String cannot be converted to JSONObject" I also tried leaving out JSONObject title = e.JSONObject("headline"); and it gives me a path error (note

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• ASP.NET permissions issues

  - by Paul

  Im using Windows Server 2008, IIS7, .NET 4 and when I use the FileUpload control to save a file to a directory I get : Access to the path 'C:\xxx\Websites\CMS\Admin\test' is denied. I have given the test folder full control permissions for NETWORK SERVICE but it makes no difference. I have given full control to the Everyone user but makes no difference. It might have something to do with the fact that up in the CMS folder there is a MVC web application and in the CMS\Admin folder there is a web forms web application. It is the web forms web application that is trying to upload the file and getting the permissions error. Can anyone offer a suggestion.

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• SVN update a working copy when parents are updated

  - by ruckuus

  I have two SVN branches and I plan to partially copy the first working copy to another. I did this: Libs /home/user/projects/libs/{lib1, lib2, lib3} Core /home/user/projects/Apps/{libs,core} svn copy --parents /home/user/projects/libs/lib1/* /home/user/projects/Apps/libs/1 svn copy --parents /home/user/projects/libs/lib2/* /home/user/projects/Apps/libs/2 svn copy --parents /home/user/projects/libs/lib3/* /home/user/projects/Apps/libs/3 The question: My peers are still working on /home/user/projects/libs/lib1, and when this repository is updated with new codes, I want my /home/user/projects/Apps/libs also updated. Is there any way to do that "automatically"? I tried to do with the same svn copy command, and of course it fails with: svn: Path '/home/user/projects/Apps/libs/1' already exists

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• Problems deleting cookies, won't unset (PHP).

  - by RemiX

  I've tried searching the php manual and internet on how to delete cookies and I've tried it the exact same way they all say: setcookie("name", '', 1); or setcookie("name", '', time()-3600); But when I check the cookies in the cookies dialog in Firefox, it's still there with the same value. I set this cookie using the following line: setcookie("name", $value, time() + 259200, $path); I found this question on stackoverflow: http://stackoverflow.com/questions/2497501/cookie-wont-unset, but none of the answers solved the problem. I also tried putting all paramaters in, like the author said, but it had no effect. Does anyone see the problem?

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• Choose Your Own Adventure : BASIC Programming

  - by theraccoonbear

  Hopefully this isn't considered too off-topic, but I guess we'll see. I'd love to find and frame a copy of this book. Years ago, in my pre-teen years, I remember reading a lot of CYOA books, and one in particular stands out in my mind as the book that started me down the path of becoming a programmer. The details are fuzzy, but what I remember was that the story involved a programmer who was held captive somewhere and was trying to escape. IIRC, each section or chapter had a short BASIC program you could could type into your computer to simulate something from the story. The one that stands out most in my mind was a very simplistic animation made with pipes, pluses, and dashes that "looked" like a metal grate that opened (sliding upward). I realize this is pretty scant information to go on, but I suspect that anyone else who read the book would immediately remember it. Maybe not, I guess we'll see. Again, my apologies if this is too far off-topic for S.O.

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• SVN moving duplicate directory structures onto one another

  - by Nash0

  I have duplicate directory structures in two locations that I need to merge together in an svn repository. By "merge" I mean I want all files and folder that are unique to structure b to be moved into structure a. When I try to do this using svn move I get the error svn: Path 'com' already exists The folders look like this: src -> com -> (many more files and directories) -> java -> com -> (some files and folders, some folders overlap but all files are unique) src\com is a and src\java\com is b.

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• How can I find if an arbitrary process is running under wow64?

  - by LCC

  I need a tool which will discover whether an arbitrary process is running in x86 or x64 mode on a machine. I need to do this programatically from C++, based on a process ID. There has to be some way to do this (as you can clearly see it from the task manager). Does anyone know of a windows api that will tell you, given a process ID, whether the application is running under wow64? Another approach would be to figure out, based on the process id, the executable name/path that is running and try to read the PE headers out of the file. Does anyone have a code snippet that would accomplish that?

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• How does the #! work?

  - by mocybin

  In a script you must include a #! on the first line followed by the path to the program that will execute the script (e.g.: sh, perl). As far as I know though, the # character denotes the start of a comment and that line is supposed to be ignored by the program executing the script. It would seem though, that this first line is at some point read by something in order for the script to be executed by the proper program. Could somebody please shed more light on the workings of the #! ? Edit: I'm really curious about this, so the more in-depth the answer the better.

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• Inventory Management OOP design

  - by rgamber

  This was an OOP design and implementation interview question, which I came across on glassdoor.com. Design and implement a inventory management system to minimize the number of missed delivery dates while keeping costs to the company low. Of course there is no right answer to this, but I am not sure I understand the question correctly and am wondering what would be a good answer. Is this as simple as creating an undirected graph with nodes as the delivery points, and edges having weights as the cost of the delivery, and then use a single-source-shortest-path algorithm (like Dijkstras, or Bellman-Ford) on the graph? Not sure if this type of question should be asked here,so let me know and I will delete it.

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• [PyQt4] QFileDialog problem (native: fast but no input field; non-native: has input field but slow)

  - by Bing Jian

  Hi, This seems a known problem but I have not found a good workaround. I like the style of the non-native QFileDialog, especially the feature that allows the user to input the path directly which is very convenient since the user can easily copy/paste the folder/file name from other applications. However, it seems very slow when the dialog is first launched. The native option is quite responsive but the problem is that it does not provide an input field so for the user to select a folder he/she has to walk into the directory, which can take many mouse clicks and is not fun. I am not sure if you have experienced similar problem or if I miss something. BTW, my PyQt version is 4.4.3 and I am working on Windows XP. Thanks, Bing

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• How to programatically set a permanent environment variable in Linux?

  - by Richard

  I am writing a little install script for some software. All it does is unpack a target tar, and then i want to permanently set some environment variables - principally the location of the unpacked libs and updating $PATH. Do I need to programmatically edit the .bashrc file, adding the appropriate entries to the end for example, or is there another way? What's standard practice? Edit: The package includes a number of run scripts (20+) that all use these named environment variables, so I need to set them somehow (the variable names have been chosen such that a collision is extremely unlikely)

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• Working in a Foreign Country [closed]

  - by iersoy

  How does it look like to be working in a foreign country? can u share your experiences with me? Is MCPD or MCITP certification and TOEFL-IELTS-Cambridge degrees will be enough for working in a foreign country? What needs to be done to find an employer to work in his/her company? EDIT: I live in Turkey,Istanbul and i like to work in one of these countries: USA UK Germany Italy France Sweden Denmark Finland Norway Switzerland Austria Holland Belgium Canada i need to make quick moves about my career and my path nowadays Thanks a lot

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• How to re-open a closed file descriptor

  - by chaitu

  I have a scenario where i created pipe for communication between two child and parent. Parent writes (using write function)data to the pipe and closes the respective file descriptor. The problem is when i want to write data again to the pipe, the write function is returning error code -1. I think its because writing end has been closed in previous iteration. Then how to open the corresponding file descriptor after it has been closed once. I tried using open() function which requires path to some file as arguement. But i am not using any files in my application. I have simple file descriptors (int arr[2]). Is it possible to achieve above scenario with pipes????

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• Is it possible to get the current request that is being served by node.js?

  - by user420504

  I am using express.js. I have a need to be able to log certain request data whenever someone tries to log a message. For this I would like to create a helper method like so function log_message(level, message){ winston.log(level, req.path + "" + message); } I would then use the method like so. exports.index = function(req, res){ log_message("info", "I'm here"); } Note that I am not passing the req object to the log_message function. I want that to be transparently done so that the log_message API user does not need to be aware of the common data that is being logged. Is there a way to achieve this with express.js/node.js. Is the request object available from a global variable of some sort?

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• Rename Files in Python

  - by Jeff

  Hi all, Im trying to rename some files in a directory using python. I've looked around the forums here, and because i'm a noob, I cant adapt what I need from what is out there. Say I have a file called CHEESE_CHEESE_TYPE.*** and want to remove "Cheese_" so my resulting filename would be "CHEESE_TYPE" Im trying to use the os.path.split but it's not working properly. I have also considered using string manipulations, but have not been successful with that either. Any help would be greatly appreciated. Thanks.

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• Insert a row and avoiding race condition (PHP/MySQL)

  - by justkevin

  I'm working on a multiplayer game which has a lobby-like area where players select "sectors" to enter. The lobby gateway is powered by PHP, while actual gameplay is handled by one or more Java servers. The datastore is MySQL. The happy path: A player chooses a sector and tells the lobby he'd like to enter. The lobby checks whether this is okay, including checking whether there are too many players in the sector (compares the entry count in sector assignments for that sector against the sector's max_players value). The player is added to the sector_assignments table pairing him with the sector. The player client receives a passkey that will let him connect to the appropriate game server. The race condition: If two players request access to the same sector at close to same time, I can envision a case where they are both added because there was one space free when their check was started and max players gets exceeded. Is the best solution LOCK TABLE on sector_assignments? Is there another option?

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• Is it possible to link a method marked with MethodImplOptions.InternalCall to its implementation?

  - by adrianbanks

  In trying to find the possible cause of an exception, I'm following a code path using Reflector. I've got deeper and deeper, but ended up at a method call that looks like: [MethodImpl(MethodImplOptions.InternalCall)] private extern void SomeMethod(int someParameter); This markup on the method tells the framework to call a C++ function somewhere. Is there any way to find out what method actually gets called, and in turn what else is likely to be called? NB: I don't really want to see the source code of this method, I just want to know the possible things that could throw the exception I am seeing that originates out of this method call.

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• Uploading video file to server from iPhone

  - by SshUser

  I know how to upload images to a server running PHP, but I am stuck on uploading video. I have used this advice to upload my video file. Posting method is all ok. What I get on the server is a file of 0 bytes. My code is below: - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL]; NSData *videoData = [NSData dataWithContentsOfFile:[videoURL path]]; } This videoData is passed in my POST method. What should I do instead?

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• Create xml file based on xPath from Excel with VBA

  - by user1626236

  I've found some items that seem to dance around what I'm looking to do. I'm not a full-fledged programmer, but have been creating my own macros in Excel. I'm trying to create one now that will help me create the structure of an XML file. I want to go down the list of XPaths, and for each one create any parents in the path as needed as well as the child and its value. I'll be adding another aspect to filter it to the fields I want, but the part I'm struggling with is the logic to check if each parent node exists, create it if needed, then add the child and its value. Bonus would be if the output file were formatted with each node on a new line, and more so if it child nodes were indented from parent, but just creating it is my primary concern. Any help would be much appreciated, this has to potential to save me a lot of time.

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• Apache not handling files correctly (Handler Help)

  - by ethanschaefer

  I'm trying to set up my .htaccess file correctly and I'm having an issue. The only thing my .htaccess file at the moment is: AddType application/x-httpd-php .php .html .htm This is included because my server is not parsing php in my html files. However when this is included in my .htaccess file, when I open a page in my browser, the user is prompted to save or open the file locally. I believe the answer to my issues is setting up an action to be done (run with php) however I cannot find out the path to my php files. Any help is appreciated.

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• I have a tab delimeted file that I want to convert into a mysql table

  - by user320835

  I have a tab delimeted file that I want to convert into a mysql table. there are 25 tab delimeted fields in the text file. I can get the values in when I construct the SQL statement word by word and get each value individually stated in the VALUES part but when I try to get the list as a whole it does not work. Here is the code. I couldn't figure it out. Any ideas? lines=open(path, "r").readlines() for line in lines[1:]: linex=line.strip().split("\t") linex.insert(0,'sometextindex') try: cursor.execute('INSERT INTO variants VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)',linex) except: print 'line number=',a,linex

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• How to make Eclipse compile with Java 1.5 in Mac OS X Leopard (10.5)?

  - by whiskeyspider

  I have been developing in Snow Leopard (10.6). I believe I have some Java6-only API features and I'd like to find these. I moved my project to Leopard (10.5) -- since Snow Leopard does not support Java 1.5 -- but I am so far unable to make Eclipse give compile errors for a Java API call which I know to have been added in 1.6. Here is what I have done: Project properties - Java Compiler - set everything to 1.5. Preferences - Java - Installed JREs - selected JVM 1.5.0. Project properties - Java Build Path - Libraries - says JRE System Library [JVM 1.5.0] What am I missing? Is there another way to find Java API calls added in 1.6 when using Eclipse in Snow Leopard? Thanks.

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• What is the proper way to test is variable is empty in a batch file, If NOT "%1" == "" GOTO SomeLabe

  - by blak3r

  I need to test if a variable is set or not. I've tried several techniques but they seem to fail whenever %1 is surrounded by quotes such as the case when %1 = "c:\some path with spaces". IF NOT %1 GOTO MyLabel // This is invalid syntax IF "%1" == "" GOTO MyLabel // Works unless %1, otherwise fatally kills bat execution IF %1 == GOTO MyLabel // Gives an unexpected GOTO error. According to this site. These are the support IF syntax types. So, I don't see a way to do it. IF [NOT] ERRORLEVEL number command IF [NOT] string1==string2 command IF [NOT] EXIST filename command

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• sIFR encoding the non-breaking space char - %20

  - by Jay Carroll

  Gotta be something I'm doing wrong when converting the ttf with OpensIFRr, but I'm seeing %20 chars for non-breaking spaces in all sIFR'd text. I'm using the jQuery sIFR plugin (3.04) with the following: <div><h1>My Example Text</h1></div> ... <script type="text/javascript"> <!-- var $j = jQuery; $j(document).ready(function(){ $j('h1').sifr({ path: '/fonts/', font: 'fancy_script' }); }); //--> </script> Happens no matter which font I use, TIA... -Jay

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