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  • Efficiency questions

    - by rayman
    Hi, I have to manage XML documents and Strings in my app. In terms of efficiency and memory usage, will a collection like ArrayList be much more expensive than String[]? Also, I could store the content as a regular String or XML. Is working with XML also more expensive? (When I say expensive, I am referring to the use of system resources.) If there are differences, are they significant? Thanks, Ray.

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  • Strange problem with NSMutableArray - Possibly some memory corruption

    - by user210504
    Hi! I am trying to update data in a table view using a NSMutableArray. Quite simple :( What is happening is that I get my data from a NSURLConnection Callback, which I parse and store it in an array and call reload data on the table view. The problem is that when cellForRowAtIndexPath is called back by the framework. The array still shows the correct count of the elements but all string objects I had stored earlier are shown as invalid. Any pointers

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  • C++ imitating ls like commands

    - by Arman
    Hi, How to implement the ls "filename_[0-5][3-4]?" like class? The result I would like to store in the vector. Currently I am using system() which is calling ls, but this is not portable under MS. thanks, Arman.

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  • Modifying vertex properties in a Boost::Graph

    - by Paul Nathan
    I am trying to figure out how to use boost::graph to store some information. However, there is information I want tied to each vertex. Staring at the documentation for the library reveals either(a)badly written documentation, or (b), I'm obviously not as good at C++ as I thought. Pick two. I am looking for either a tutorial on assigning properties, or a simple example use.

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  • What is the best way to run a loop of regressions in R?

    - by stevejb
    Assume that I have sources of data X and Y that are indexable, say matrices. And I want to run a set of independent regressions and store the result. My initial approach would be results = matrix(nrow=nrow(X), ncol=(2)) for(i in 1:ncol(X)) { matrix[i,] = coefficients(lm(Y[i,] ~ X[i,]) } But, loops are bad, so I could do it with lapply as out <- lapply(1:nrow(X), function(i) { coefficients(lm(Y[i,] ~ X[i,])) } ) Is there a better way to do this?

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  • How to connect an existing strongly-typed data set to a different server at run time?

    - by Kiril
    I am coding a simple space empire management game in Visual C# 2008, which relies on connecting to a remote SQL server database to get/store data. I would like the user to be able to connect to a user-specified SQL server from the login screen(he specifies IP address, port, database name, ID, password and presses "connect" button). However, I found out that the Dataset connection string property is read only and cannot be changed. Is there any way to guide the wizard-generated DataSet to a user-specified server at run time?

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  • IE opens a new window for a link, FF doesn't

    - by Blankman
    Very strange, I have a list of products. When a user clicks on an the image it opens up a new IE window. Firefox doesn't do this. What could be the reason for this? the urls are: http://website.example.com and clicking on the image goes to (which is hosted on another server): http://store.website.example.com Could this be some internal security measure or ?

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  • More about the Standard Entry Sequence

    - by Mask
    quoted from here: _function: push ebp ;store the old base pointer mov ebp, esp ;make the base pointer point to the current ;stack location – at the top of the stack is the ;old ebp, followed by the return address and then ;the parameters. sub esp, x ;x is the size, in bytes, of all ;"automatic variables" in the function What's stored in esp in the above code snippet?

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  • Android: DOM-Model to XML

    - by poeschlorn
    Hey Guys, analogue to this one (http://stackoverflow.com/questions/2788345/replacing-xml-in-file-from-document-in-java or http://www.exampledepot.com/egs/javax.xml.transform/WriteDom.html) I try to use it under Android... The problem is, that I can't use the suggested solution under android, because it throws java.lang.verifyError... After reading a little bit, I found out, that the class that was used to store the data to file, is not usable in android... can you suggest another solution, which is similar easy to use?

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  • PHP URL Security Question

    - by TaG
    I want to have users store the url in my database I'm using php mysql and htmlpurifier I was wondering if the following code was good way to filter out bad data? Here is the Partial PHP code. $url = mysqli_real_escape_string($mysqli, $purifier->purify(htmlspecialchars(strip_tags($_POST['url'])));

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  • memcached never expired in rails?

    - by pickerel
    It's very strange that the session will never expire if i use memcached store even i set config.action_controller.session :session_expires = 1.seconds.from_now And I use extended_fragment_cache to cache fragment, I meet the same problem <% Cache "my_page", {:expires = 1.minutes} do ... % never expired! Anyone know where's the problem?

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  • Query performance difference pl/sql forall insert and plain SQL insert

    - by user289429
    We have been using temporary table to store intermediate results in pl/sql Stored procedure. Could anyone tell if there is a performance difference between doing bulk collect insert through pl/sql and a plain SQL insert. Insert into or Cursor for open cursor fetch cursor bulk collect into collection Use FORALL to perform insert Which of the above 2 options is better to insert huge amount of temporary data?

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  • Add network service

    - by user302655
    I have a kernel service driver , i want to install it with an installer . I use Wix that already copy files in driver store but i still need to add the service to the nerwork manualy (in local area connection properties) How can i do this in wix or in javascript ?

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  • Cache Auth Tokens (or Caching HTTP headers in General) - Best Practices

    - by viatropos
    I'm using the Ruby GData Library to access Google Docs and I recently got the GData::Client::CaptchaError because I was re-logging in with every request. Reading this post, it recommends not logging in with every request, but caching the authentication token. How do I go about doing that correctly? Google says it expires every 24 hours, and it doesn't seem like I should store it in the session, so what should I do? I'm using Ruby on Rails with all this. Thanks so much

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  • storing HTML5 webdatabase table data to sql server periodically

    - by DotnetSparrow
    I want to read data from html5 web database and post to sql server using vb.net server side. I have used following link as reference: http://www.html5rocks.com/en/tutorials/webdatabase/todo/ I have created a web database and created table and stored some data in it. Now I want to store this data to sql server. How to get the data from html 5 web database and post to sql server each hour ( using some js timer). Please suggest solution

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  • Problem using date when querying the appengine datastore

    - by manu1001
    I'm running this query: SELECT FROM com.Data WHERE entryDate DATE('2010-3-16') I get this error: org.datanucleus.store.appengine.query.DatastoreQuery$UnsupportedDatastoreFeatureException: Problem with query DATE('2010-3-16'): Unsupported method while parsing expression: InvokeExpression{[null].DATE(Literal{2010-3-16})} The same query works when I use it on the admin console. But it does not work for code (java), either locally or when deployed. Any ideas?

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  • Core data, sorting one-to-many child objects

    - by Shizam
    So if I have a store of parents children and the parent has a one to many relationship to children (parent.children) and they all have first names. Now, on the initial fetch for parents I can specify a sort descriptor to get them back in order of first name but how can I request the children in order? If I do a [parent.children allObjects] it just gives them back in a jumble and I'd have to sort after the fact, every time. Thanks, Sam

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