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  • Best database (mysql) structure for this case:

    - by robert
    we have three types of data (tables): Book (id,name,author...) ( about 3 million of rows) Category (id,name) ( about 2000 rows) Location (id,name) ( about 10000 rows) A Book must have at least 1 type of Category (up to 3) AND a Book must have only one Location. I need to correlate this data to get this query faster: Select Books where Category = 'cat_id' AND Location = 'loc_id' Select Books where match(name) against ('name of book') AND Location = 'loc_id' Please I need some help. Thanks

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  • A programming language for teaching data structures and algorithms with? [closed]

    - by Andreas Grech
    Possible Duplicate: Choice of programming language for learning data structures and algorithms Teachers have different opinions on what programming language they would choose to teach data structures and algorithms with. Some would prefer a lower level language such as C because it allows the student to learn more about what goes on beyond the abstractions in terms of memory allocation and deallocation and pointers and pointer arithmetic. On the other hand, others would say that they would prefer a higher level language like Java because it allows the student to learn more about the concepts of the structures and the algorithm design rather than 'waste time' and fiddle around with memory segmentation faults and all the blunders that come with languages where memory management is manual. What is your take on this issue? And also, please post any references you may know of that also discuss this argument.

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  • file_get_contents() Connection timed out problem.

    - by Syom
    i use file_get_contents() to get dinamic data. here is my script... $str = file_get_contents("http://cba.am/"); some sript here... it works fine for a long time, but now it returns Connection timed out. and what is strange, when i run the script from local server, it works fine. could you tell me why, and what can i do, to solve this. maybe i must set the higher timeout time in php.ini? Thanks

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  • Python: Pickling highly-recursive objects without using `setrecursionlimit`

    - by cool-RR
    I've been getting RuntimeError: maximum recursion depth exceeded when trying to pickle a highly-recursive tree object. Much like this asker here. He solved his problem by setting the recursion limit higher with sys.setrecursionlimit. But I don't want to do that: I think that's more of a workaround than a solution. Because I want to be able to pickle my trees even if they have 10,000 nodes in them. (It currently fails at around 200.) (Also, every platform's true recursion limit is different, and I would really like to avoid opening this can of worms.) Is there any way to solve this at the fundamental level? If only the pickle module would pickle using a loop instead of recursion, I wouldn't have had this problem. Maybe someone has an idea how I can cause something like this to happen, without rewriting the pickle module? Any other idea how I can solve this problem will be appreciated.

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  • SQL, Auxiliary table of numbers

    - by vzczc
    For certain types of sql queries, an auxiliary table of numbers can be very useful. It may be created as a table with as many rows as you need for a particular task or as a user defined function that returns the number of rows required in each query. What is the optimal way to create such a function?

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  • Class destructor memory handling in C++

    - by wyatt
    What potential memory leaks won't an implicit destructor handle? I know that if you have anything stored on the heap it won't handle it, and if you have a connection to a file or a database, that needs to be handled manually. Is there anything else? What about, say, non-base data types like vectors? Also, in an explicit destructor, need you destroy non-heap variables which would have been destroyed by the implicit, or are they handled automatically? Thanks

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  • Should I worry about running out of HierarchyIDs?

    - by Bruno Martinez
    When you ask for a new HierarchyID between two others, the result gets progressively longer. For example, between 2/5.6 and 2/5.7 there's only 2/5.6.1 and other 4 component paths. The HierarchyID data type is limited to 800 some bytes, so you can't repeat this forever. Then again, integer types are also limited, but it isn't a problem in practice. Should I periodically defragment my table so that height doesn't grow unbounded?

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  • Is it safe to develop for older versions of Zend Framework?

    - by RenderIn
    Our vendor-supported server's O/S only supports PHP 5.1.6, which limits us to ZF 1.6. The current version of Zend Framework requires a higher version of PHP. We're struggling to decide whether to adopt ZF because of this incompatibility. Is it feasible to develop (indefinitely) in these older versions of ZF or should we hold off? Features, security, bugs, etc. Is this a path we don't want to go down or are these older versions perfectly usable in a production environment?

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  • Java - Regex problem

    - by Yatendra Goel
    I have list of urls of types: http://www.abc.com/pk/etc http://www.abc.com/pk/etc/ http://www.abc.com/pk/etc/etc where etc can be anything. So I want to search only those urls that contains www.abc.com/pk/etc or www.abc.com/pk/etc/

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  • Grails UnitTest

    - by Tomáš
    Hi (it is propably stupid question) how can acquire Domain class from database in test? class PollServiceTests extends GrailsUnitTestCase { Integer id = 1 void testSomething() { Teacher teacher1 = Teacher.get(id) assert teacher1 != null } } I always get null or No signature of method: cz.jak.Teacher.get() is applicable for argument types: (java.lang.Integer) values: [1] thanks a lot Tom

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  • Access message inbox without Content UrI (content//:sms)

    - by Nishant Kumar
    Hi, I want to access the messages stored in inbox through my android project. I have tried the method of forming URI for sms (content://sms/ inbox) and then quering it for various parametres. But I cannot find any documentation for reading inbox sms in the standard Android Developr Docs. It was mentioned at various websites that this content has been removed from the standard sdk. The application may not support higher version of android. So, how can I create an apllication to read sms from inbox that is reliable in furture version of android. Please help !!

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  • IE 6&7 Hanging When Opening New Window

    - by user310490
    I've got a real interesting situation. I have an existing web app that runs on a number of desktops fine. On a few desktops I see the following behavior: Upon clicking a link that opens up a new window (to another URL in the same domain) the IE window freezes and IE needs to be killed. This happens on IE 6 & 7. When using Fiddler I see NO traffic when clicking the link. When using IE HttpAnalyzer I see a request register but no response. If I change the MaxConnectionsPerServer registry setting to a higher value, e.g. 10 the problem goes away. Looking at netstat I dont see any abnormal connections. So I'm totally confused, the issue seems to be on the client side and seems to be related to IE not being able to make an additional socket connection to the server, but netstat doesn't show that. Ideas?

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  • how to find if groovy args contains a particular string

    - by groovynoob
    println args println args.size() println args.each{arg-> println arg} println args.class if (args.contains("Hello")) println "Found Hello" when ran give following error: [hello, somethingelse] 2 hello somethingelse [hello, somethingelse] class [Ljava.lang.String; Caught: groovy.lang.MissingMethodException: No signature of method: [Ljava.lang. String;.contains() is applicable for argument types: (java.lang.String) values: [Hello] why can I not do contains?

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  • recognizing a link in an email

    - by Rob Bonner
    Is there a mechanism where I can identify a string in an email, say a order number, and have it route to my iPhone application? I know that base types do this, but not sure if I can create a new type for my app. Thanks!

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  • When is it okay to reference WindowsBase.dll?

    - by Tyler
    I've heard/read about people not wanting to reference the assembly because of the Windows component (e.g. "I don't want to reference Windows for my Web App). I'd like to hear what a large community feels about this. For which project types (business, data access, etc.) is it considered acceptable to reference WindowsBase.dll.

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  • How is animation accomplished in these apps?

    - by android noob
    Most of the Android users use the GO SMS app, and the iPhone users use their normal messaging app (Android rocks). Now, whenever a user types a message and presses the send button, the message's edit text field sets a glossy green background, also the green colored background comes floating at the back of the edit text field. How do they do it? (I have been searching this for a while, but was unable to find an answer.)

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  • Handler not yet determined error

    - by SourceC
    Hello, I don’t know anything about deploying a website, so I probably made some stupid mistake. Anyways, I opened IIS 7 manager, created new virtual directory ( via Add Application ) and pointed it to physical directory where Visual studio saved my Web project. But when I tried to request an .aspx page, browser reported the following error (I won’t post the whole error, but just the interesting bits): Handler: Not yet determined Config Error: Cannot read configuration file due to insufficient permissions Logon User: Not yet determined A) why is handler not yet determined? As far as I know, IIS7 does have Asp.Net handler registered?! B) Why wouldn’t IIS have sufficient permissions? Does that mean I should give IIS higher privileges? Or does Asp.Net runtime have insufficient permissions? C) Could the error also be due to the fact that perhaps it expected the user to authenticate itself? I’m assuming this due to Logon user not yet being determined? D) And finally, any ideas how to make it work? thanx

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  • Blob ID matching over multiple frames in C++ (image analysis)

    - by pollux
    Dear reader, I'm working on a blob matching and tracking library in C++. Currently I'm using openCV to detect blobs and try to match blobs in a new frame by checking the position, velocity and size of the blob. This works quite okay and I'm receiving a high blob match rate (95% or higher). Sometimes blobs fall out of the image or new blobs appear. Now I need to give matched blobs the same ID as they had before. I'm wondering if there are typical or commonly used techniques for doing this. Or even some keywords I can use to google on. Thanks

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  • what are LPARAM and WPARAM defined as

    - by Mark Heath
    I know I'm being lazy here and I should trawl the header files for myself, but what are the actual types for LPARAM and WPARAM parameters? Are they pointers, or four byte ints? I'm doing some C# interop code and want to be sure I get it working on x64 systems.

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  • Why does my Sharepoint page's custom content type change to "Page" when editing?

    - by Mobius
    I have a custom Sharepoint 2007 site definition with custom content types for the different page layouts. When editing a page using a custom layout from the main "View all contents" tree view, the page content type is fine, but if I view the page directly and edit it from there, the content type gets stripped and replaced with "Page." I can change it back by viewing and editing it from the main list, but not from its subsite home location.

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