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• Copy text from website.

  - by VBeginner

  So, I've been saving a .txt file from a website and using... My.Computer.FileSystem.ReadAllText() To put it into a string. But I figured it'd be more efficient to just grab it directly. How do I go about this? Thank you.

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• Update thousands of records in a DataSet to SQL Server

  - by MSIL

  I have half a million records in a data set of which 50,000 are updated. Now I need to commit the updated records back to the SQL Server 2005 Database. What is the best and efficient way to do this considering the fact that such updates could be frequent (though concurrency is not an issue but performance is)

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• How does NHibernate implement change tracking?

  - by Alice

  Does nhibernate proxies do any smart job to make change tracking efficient? Or does it only support what Entity Framework calls snapshot based change tracking?

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• slicing arrays in numpy/scipy

  - by user248237

  I have an array like: a = array([[1,2,3],[3,4,5],[4,5,6]]) what's the most efficient way to slice out a 1x2 array out of this that has only the first two columns of "a"? I.e., array([[2,3],[4,5],[5,6]]) in this case. thanks.

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• Auto-complete editor for SQL statement

  - by Stan

  Is there any plugings or text editor to auto-complete SQL statement? I am using SQL Server Management Studio (ssms) 90% of time, but most of time I have to type SELECT FROM WITH(NOLOCK) WHERE blahblah. Trying to find a more efficient way. Thanks.

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• Record/playback keystrokes in textfield using Javascript

  - by James

  Is it possible to record a user's input into an HTML textfield, and playback at a later date in realtime? One way I can think of would be to capture each keyDown event and the time delta (accurate to a few hundred ms), and store the pairs together. Can you think of a better/more efficient way?

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• Books on string algorithms

  - by Max

  There have been numerous posts on string algorithms: http://stackoverflow.com/questions/246961/algorithm-to-find-similar-text, http://stackoverflow.com/questions/451884/similar-string-algorithm, http://stackoverflow.com/questions/613133/efficient-string-matching-algorithm However, no general literature was mentioned. Could anyone recommend a book(s) that would thoroughly explore various string algorithms? The topic which is of special interest is approximate string matching [things like google-offered corrected search string variants :) ]. Thanks a lot for advice.

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• Cleanest way to get last item from Python iterator

  - by Peter

  What's the best way of getting the last item from an iterator in Python 2.6? For example, say my_iter = iter(range(5)) What is the shortest-code / cleanest way of getting 4 from my_iter? I could do this, but it doesn't seem very efficient: [x for x in my_iter][-1]

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• asp.net mvc html rendering on cs file efficiency

  - by mazhar

  Is it really efficient to render HTML in cs file . i am talking about the efficiency only? Please No any other approach here.

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• In PHP, given an array of arrays, how can I replace all empty values with 0?

  - by stormist

  Example array $myArray[0] = array('23, null, 43, 12'); $myArray[1] = array('null, null, 53, 19'); $myArray[2] = array('12, 13, 14, null'); All nulls should be replaced with 0. I was hoping someone would have an efficient way of doing this, perhaps a built in PHP function that I am unaware of.

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• Drupal 7 front page URL after changing the front page

  - by Freeman

  I have used Configuration|Site Information|Default Front Page to designate node/55 as my front page. How can I create a menu linking to the original front page, i.e. the one with the list of articles? If I link to <front> it goes to node/55. P.S.: I have been able to simulate this by enabling the frontpage view, but, if possible, it would be more efficient to just link to the original front page URL.

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• How can I get the same strstream functionality now that's deprecated?

  - by chila

  I use to write code like this: void fun(char *buff, unsigned size) { std::strstream str(buff, size); str << "hello world: " << 5; } so I can use stream output over an arbitrary buffer. I've found this technique both efficient (no allocations) and useful (streams!). Now that std::strstream is deprecated, how can I get the same speed+flexibility that I can get with this code?

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• Need a Java map/table with multiple keys to one value. Value is commonly altered

  - by Duncan

  What I need is a collection which allows multiple keys to access a single object. I need to apply frequent alterations to this object. It also must be efficient for 500k+ entries.

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• C++ error message output format

  - by sub

  If I want to trigger an error in my interpreter I call this function: Error( ErrorType type, ErrorSeverity severity, const char* msg, int line ); However, with that I can only output Name error: Undefined variable in line 1 instead of Name error: Undefined variable 'someVariableName' in line 1 I'm working entirely with strings (except for the error messages as they all are constant at the moment), so sprintf won't work. What is the best way to create an efficient error function that can output a constant message combined with a string that describes which object, e.g.: a non-existing variable, triggered the error?

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• are there any good timer implementation in perl

  - by Haiyuan Zhang

  I'm looking for good timer implementation in perl. The situation I met is like: I need to keep track of I/O activities of many files and for thoes files keep untouched for enough time a remove action will be taken upon them, so an efficient timer implementation is really vital for the app I'm involved right now. To avoid recreate the wheel, ask you guys for help first.

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• Bubbling up events . .

  - by oo

  I have multiple layers in an application and i find myself having to bubble up events to the GUI layer for doing status bar changes, etc . . I find myself having to write repeated coded where each layer simply subscribes to events from the lower layer and then in the call back simply raise an event up the chain. Is there a more efficient way of doing this?

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• Databases: Migrate data between MS Access DB and MYSQL

  - by Dean

  Hello, I have 2 databases, one is MS Access DB from an old website, and the other one is MYSQL from the new Joomla+VirtueMart based website. I need to migrate existing products from MS Access to MYSQL. I thought of putting both on server and writing SQL queries in MYSQL workbench, untill I have a good script for that, but I'm very new to SQL, so I'd rather avoid that. I there a better way and more efficient for that?

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• How do I select a random record efficiently in MySQL?

  - by user198729

  mysql> EXPLAIN SELECT * FROM urls ORDER BY RAND() LIMIT 1; +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ | 1 | SIMPLE | urls | ALL | NULL | NULL | NULL | NULL | 62228 | Using temporary; Using filesort | +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ The above doesn't qualify as efficient,how should I do it properly?

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• Performance - FunctionCall vs Event vs Action vs Delegate

  - by hwcverwe

  Currently I am using Microsoft Sync Framework to synchronize databases. I need to gather information per record which is inserted/updated/deleted by Microsoft Sync Framework and do something with this information. The sync speed can go over 50.000 records per minute. So that means my additional code need to be very lightweight otherwise it will be a huge performance penalty. Microsoft Sync Framework raises an SyncProgress event for each record. I am subscribed to that code like this: // Assembly1 SyncProvider.SyncProgress += OnSyncProgress; // .... private void OnSyncProgress(object sender, DbSyncProgressEventArgs e) { switch (args.Stage) { case DbSyncStage.ApplyingInserts: // MethodCall/Delegate/Action<>/EventHandler<> => HandleInsertedRecordInformation // Do something with inserted record info break; case DbSyncStage.ApplyingUpdates: // MethodCall/Delegate/Action<>/EventHandler<> => HandleUpdatedRecordInformation // Do something with updated record info break; case DbSyncStage.ApplyingDeletes: // MethodCall/Delegate/Action<>/EventHandler<> => HandleDeletedRecordInformation // Do something with deleted record info break; } } Somewhere else in another assembly I have three methods: // Assembly2 public class SyncInformation { public void HandleInsertedRecordInformation(...) {...} public void HandleUpdatedRecordInformation(...) {...} public void HandleInsertedRecordInformation(...) {...} } Assembly2 has a reference to Assembly1. So Assembly1 does not know anything about the existence of the SyncInformation class which need to handle the gathered information. So I have the following options to trigger this code: use events and subscribe on it in Assembly2 1.1. EventHandler< 1.2. Action< 1.3. Delegates using dependency injection: public class Assembly2.SyncInformation : Assembly1.ISyncInformation Other? I know the performance depends on: OnSyncProgress switch using a method call, delegate, Action< or EventHandler< Implementation of SyncInformation class I currently don't care about the implementation of the SyncInformation class. I am mainly focused on the OnSyncProgress method and how to call the SyncInformation methods. So my questions are: What is the most efficient approach? What is the most in-efficient approach? Is there a better way than using a switch in OnSyncProgress?

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• Linking two pages using JSP

  - by jamesatha

  So, I am trying to use JSP to create a set of webpages. I want to link two pages so that if the user clicks a button in one page, it will trigger an event in the other page. Is there an efficient way to do this? I was taking a look at creating cookies and/or sessions. Any suggestions on these two methods? Thanks

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• Possible to lock attribute write access by Doors User?

  - by Philip Nguyen

  Is it possible to programmatically lock certain attributes based on the user? So certain attributes can be written to by User2 and certain attributes cannot be written to by User2. However, User1 may have write access to all attributes. What is the most efficient way of accomplishing this? I have to worry about not taking up too many computational resources, as I would like this to be able to work on quite large modules.

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• What should main() return in C/C++?

  - by Joel

  What way is the most efficient and why? int main()? void main()? return 1? return 0?

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• jQuery - Why is "live" inefficient? And how can we measure that?

  - by ming yeow

  why do programmers say that "live" is inefficient? So what are the alternative methods to replicating that function that are more efficient? How do we measure the impact of how much it slows things down?

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• SQL: ... WHERE X IN (SELECT Y FROM ...) ...

  - by Craig Johnston

  Is the following the most efficient in SQL to achieve its result: SELECT * FROM Customers WHERE Customer_ID NOT IN (SELECT Cust_ID FROM SUBSCRIBERS) Could some use of joins be better and achieve the same result?

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• Javascript for loop efficiency

  - by Misha Moroshko

  Is for (var i=0, cols=columns.length; i<cols; i++) { ... } more efficient than for (var i=0; i<columns.length; i++) { ... } ? In the second variant, is columns.length calculated each time the condition i<columns.length is checked ?

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