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• How to create wordpress-like option table and get values for each row? (PHP-MySQL)

  - by Nacho

  Hi guys. I'm looking to create an options table in my db that makes every record a system option, so i can work with a little number of fields. my db has the following structure: 3 columns named id, name, and value following data is inserted as an example -- id - name - value 1 - uri - www.example.com 2 - sitename - Working it out 3 - base_folder - /folder1/folder2/ 4 - slogan - Just a slogan for the site -- that way i can include a large number of customizable system options very easily the problem is that i don't know how to retrieve them how do i get the value of uri and store it as a var? and better yet, how do i get, for exmaple, values of id 1 and 4 only without making a query each time? (i assume multiple queries are useless and a pretty ugly method) i know the question is pretty basic but i'm lost here. i'd really appreciate your answer! Thanks in advance

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• Why does this C++ char array seem to be able to hold more than its size?

  - by Phenom

  #include <iostream> using namespace std; typedef struct { char streetName[5]; } RECORD; int main() { RECORD r; cin >> r.streetName; cout << r.streetName << endl; } When I run this program, if I enter in more than 5 characters, the output will show the whole string I entered. It does not truncate at 5 characters. Why is that? How can I get this to work correctly?

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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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• array of objects of a class

  - by anurag18294

  #include class test{ int a; char b; public: test() { cout<<"\n\nDefault constructor being called"; } test(int i,char j) { a=i; b=j; cout<<"\n\nConstructor with arguments called"; } }; int main() { test tarray[5]; test newobj(31,'z'); }; In the above code snippet can we intialize values to tarray[5].

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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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• Destructors for C++ Interface-like classes

  - by sdg

  Starting to use PC-Lint on an existing code base (fear and trepidation). One thing that it complains about is the following: class IBatch { public: virtual void StartBatch() =0; virtual int CommitBatch() =0; }; Which when another class derives from this to use it like an interface base class 'IBatch' has no destructor So, the question: when you create Interface classes like the above, do you always include a virtual destructor? Why? (is it a style or a coding error?)

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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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• 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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• Is there a circular hash function?

  - by Phil H

  Thinking about this question on testing string rotation, I wondered: Is there was such thing as a circular/cyclic hash function? E.g. h(abcdef) = h(bcdefa) = h(cdefab) etc Uses for this include scalable algorithms which can check n strings against each other to see where some are rotations of others. I suppose the essence of the hash is to extract information which is order-specific but not position-specific. Maybe something that finds a deterministic 'first position', rotates to it and hashes the result? It all seems plausible, but slightly beyond my grasp at the moment; it must be out there already...

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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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• How to get just free heap size (not together w stack/method mem) in Java?

  - by Pentium10

  I want to calculate the heap usage for my app. I would like to get a procent value of Heap size only. How do I get the value in code for the current running app? EDIT The upvoted answer is NOT complete/correct. The values returned by those methods include stack and method area too, and I need to monitor only heap size. With that code I got HeapError exception when I reached 43%, so I can't use those methods to monitor just heap.

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• c language:make fgets to keep taking input until I press enter twice?

  - by wello horld

  hi I would like to ask how I would modify this code for the question: (It only accepts one input then prints it out. I want it to keep going until I hit enter (\n) twice. #include <stdio.h> #define MAXLENGTH 1000 int main(void) { char string[MAXLENGTH]; fgets(string, MAXLENGTH, stdin ); printf("%s\n", string); return 0; } I'm confused at the fgets(string, MAXLENGTH, stdin ); line, what does stdin mean/do?

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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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• 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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• What is the problem with this code?

  - by eSKay

  #include<stdio.h> class A { public: int a;}; class B: public A { public: static int b; B(){ b++; printf("B:%d\n",b); } }; int main() { A* a1 = new B[100]; A* a2 = new B(); return 0; } Error: In function `main': undefined reference to `B::b' undefined reference to `B::b' undefined reference to `B::b' undefined reference to `B::b'

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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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• [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 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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• SP: Random Records, Fave Record, Plus Known Record, NO repetition.

  - by Munklefish

  Hi, Thanks to help from a lot of you guys ive been given the following code which works great. However ive realised ive missed an important bit of info out of the question and so have reposted here (with updated code) to clarify. The following code gets 5 random records from a table plus a further single record based on the users favourite as identified in a second table: CREATE PROCEDURE web.getRandomCharities ( @tmp_ID bigint --members ID ) AS BEGIN WITH q AS ( SELECT TOP 5 * FROM TBL_CHARITIES WHERE cha_Active = 'TRUE' AND cha_Key != '1' ORDER BY NEWID() ) SELECT * FROM q UNION ALL SELECT TOP 1 * FROM ( SELECT * FROM TBL_CHARITIES WHERE TBL_CHARITIES.cha_Key IN ( SELECT members_Favourite FROM TBL_MEMBERS WHERE members_Id = @tmp_ID ) EXCEPT SELECT * FROM q ) tc END However, i realised i also need to include the record where "cha_Key == '1'" if it isnt the same as the record returned in the second SELECT statement in the code shown above. HOpe that makes sense? THANKS!!!

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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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• 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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• Mysql database structure...

  - by Patrick

  I'm creating a members site, and I'm currently working on the user Preference settings. Should I create a table with all the preference fields (about 17 fields) or should I include them in the main member table along with the account settings? Is there a limit as to how many fields I should have in a table? currently the member table has about 21 fields... not sure if its okay to add another 17 more fields when I can easily just put them in another table. It'll take more coding to pull up the data though... any sugguestions?

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• how to integrate my users database table with the aspnet_users table that comes with asp.net members

  - by ooo

  i have a database that already has a users table COLUMNS: userID - int loginName - string First - string Last - string i just installed the asp.net membership table. Right now all of my tables are joined into my users table foreign keyed into the "userId" field How do i integrate asp.net_users table into my schema? here are the ideas i thought of: Add a membership_id field to my users table and on new inserts, include that new field in my users table. This seems like the cleanest way as i dont need to break any existing relationships. break all existing relationship and move all of the fields in my user table into the asp.net_users table. This seems like a pain but ultimately will lead to the most simple, normalized solution any thoughts?

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• How to discard const in c++

  - by Vincenzo

  This is what I'm trying to do and I can't: #include <string> using namespace std; class A { bool has() const { return get().length(); } string& get() { return s; } private: string s; }; The error I'm getting is: passing ‘const A’ as ‘this’ argument of ‘std::string& A::get()’ discards qualifiers I understand what the problem is, but how can I fix it? I really need has() to be const. Thanks.

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• JQuery-code on different content pages

  - by Ockonal

  Hello, I have a site with menu, which reloads content. Content is dynamically loadable, using ajax and php-script. At different content pages I need in different jquery-plugins. But If I'm writing including need plugin directly in some content page, I get a big lags during loading. So, now I'm includgin all plugins into main page... And it's not the best idea... Any suggestion? UPD: I have a div with content. Content is shown with effects (rolling up/down). When part of menu is clicked, I'm sending ajax-responce to the php script, which reads need text from database and returns it to the main page, from which I sent the responce. Than I'm pasting that content into a div and roll id down. So I'll include jquery-plugins in content pages, the animation of rolling will'nt be normal.

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