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• Periodically check command line output in C#

  - by iulianchira

  In my C# program I call an external program from command line using a process and redirecting the standard input. After I issue the command to the external program, every 3 seconds I have to issue another command to check the status - the program will respond with InProgress or Finished. I would like some help in doing this as efficient as possible.

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• coco2d tab view for multi player

  - by godzilla

  I am currently developing a card game for the iphone using cocas2d. I am currently in need of a tab view with each tab representing a player and his / her set of cards. Currently i have a single view representing just one player. It seems as though cocas2s is not really built do have multiple views, to do this and it would require some serious amount of hacking around with the code. What would be the most efficient way to accomplish this?

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• Get size of max possible result set

  - by wheresrhys

  For my application most of my SQL queries return a specified number of rows. I'd also like to get the maximum possible number of results i.e. how many rows would be returned if I wasn't setting a LIMIT. Is there a more efficient way to do this (using just SQL?) than returning all the results, getting the size of the result set and then splicing the set to return just the first N rows.

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• Storing HTML formatted text in database

  - by user279521

  I am building a web site similar to Craigslist. I would like to know how to store the html formatted text (bold / italics / font size etc) in a sql 2008 database? In order words, the user would enter their text, format it with font size, bold etc and save the information. Whats the most efficient way to store that in a database?

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• Streaming a POI workbook to the servlet output stream.

  - by The Machine

  I build a very large POI workbook, on my web server. Holding the entire memory in workbook , will not scale for multiple concurrent requests. Is there a way i can progressively write the workbook to the servlet output stream. That should reduce the response time , as well as make the process memory efficient.

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• Most interesting and challenging programming tasks

  - by dsimcha

  Some programmers enjoy optimizing code to make the implementation as fast as humanly possible; or golfing to make code as compact as possible. Others enjoy metaprogramming to make code generic, or designing algorithms to be asymptotically efficient. What do you find most interesting and challenging as a programmer?

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• Being good in jQuery == Being good in Javascript??

  - by p0larBoy

  I'm pretty efficient in jQuery, having implementing it in several projects for my company. However, I found myself a little lost when reading stuff like node.js. Do i have to go back to basics and learn the javascript language or should i just stick with jQuery?

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• Algorithm to find the factors of a given Number.. Shortest Method??

  - by AGeek

  What could be the simplest and time efficient logic to find out the factors of a given Number. Is there any algorithm that exist, based on the same. Actually, my real problem is to find out the no. of factors that exist for a given Number.. So Any algorithm, please let me know on this.. Thanks.

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• Best practices for implementing an Access (2007) application

  - by waanders

  Hello, Where can I find an overview (website) of best practices for implementing an Access (2007) application (with a FE/BE architecture) regarding to security, performance and maintainability? I know about designing tables, queries, forms and so on and I'm a reasonable programmer, but I'm wondering what's the "best" and most efficient way to implement my "application". Thanks in advance for your help.

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• Silverlight: Is it possible to use custom mouse cursors/pointers?

  - by Mark Redman

  I have just found this page indicating the support for Silverlight mouse cursors: http://msdn.microsoft.com/en-us/library/system.windows.input.cursor(VS.95).aspx Is that it!!! :-| what are they thinking, at least there is stylish looking Eraser! Is there aany other way to use custom cursors? How efficient/usable would it be to hide the cursor and show a png instead?

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• Is there a Better Way to Retreive Raw XML from a URL than WebClient or HttpWebRequest? [.NET]

  - by DaMartyr

  I am working on a Geocoding app where I put the address in the URL and retreive the XML. I need the complete XML response for this project. Is there any other class for downloading the XML from a website that may be faster than using WebClient or HttpWebRequest? Can the XMLReader be used to get the full XML without string manipulation and would that be faster and/or more efficient?

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• Checking for duplicates in a vector

  - by xbonez

  I have to check a vector for duplicates. What is the best way to approach this: I take the first element, compare it against all other elements in the vector. Then take the next element and do the same and so on. Is this the best way to do it, or is there a more efficient way to check for dups?

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• Drawing single pixel in Quartz

  - by wwrob

  I have an array of CGPoints, and I'd like to fill the whole screen with colours, the colour of each pixel depending on the total distance to each of the points in the array. The natural way to do this is to, for each pixel, compute the total distance, and turn that into a colour. Questions follow: 1) How can I colour a single pixel in Quartz? I've been thinking of making 1 by 1 rectangles. 2) Are there better, more efficient ways to achieve this effect?

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• String Parsing in C#

  - by Betamoo

  What is the most efficient way to parse a C# string in the form of "(params (abc 1.3)(sdc 2.0)....)" into a struct in the form struct Params { double abc,sdc....; } Thanks EDIT The structure always have the same parameters (number and names).. but the order is not granted..

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• C# equivalent of NaN or IsNumeric

  - by johnc

  This seems like a fairly simple question, and I'm surprised not to have required it before. What is the most efficient way of testing a string input is a numeric (or conversely Not A Number). I guess I can do a Double.Parse or a regex (see below) public static bool IsNumeric(this string value) { return Regex.IsMatch(value, "^\\d+$"); } but I was wondering if there was a implemented way to do it, such as javascript's NaN() or IsNumeric() (was that VB, I can't remember).

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• Optimal xml storage engine

  - by nixau

  I'm considering optimal open source solution for storing xml documents with further querying on them effectively. Amount of data will be small. As far as I understand native xml databases might form a proper solution for my case. They obviously store xml documents in highly efficient way. It would be great to learn your experience. Any suggestions on proper solution? Have you got any experience employing xml storage engines in your apps?

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• MySQL More Tables or More Rows

  - by Pez Cuckow

  I am working on a game that I am going to open to the public to have on their game. The game stores lots of information (about 300 rows) per website and spends a lot of time updating values within this MySQL database. Is it better (faster/efficient) to add a new table for every website or to just have 1000's of rows in one table and add a column "website_id" or similar?

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• Complex Calculations

  - by mson

  What are the best tools (most efficient) available in .NET (C#) for calculating: integrals partial derivatives other non-trivial math Can people please comment on Mathematica and Matlab and their integration into C#?

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• sending +-200 emails using php mail() function in a loop

  - by Glenn

  Note: It is worth noting that the mail() function is not suitable for larger volumes of email in a loop. This function opens and closes an SMTP socket for each email, which is not very efficient. Source: PHP manual What are larger volumes? A 100 or a 1000?? Can I safely make it loop 200 times without much problems? (I can't install pear)

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• what are sparse voxel octrees?

  - by pdeva

  I have reading a lot about the potential use of sparse voxel octrees in future graphics engines. However I have been unable to find technical information on them. I understand what a voxel is, however I dont know what sparse voxel octrees are or how are they any more efficient than the polygonal techniques in use now. Could somebody explain or point me to an explanation for this?

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• Is there a bruteforce-proof hashing algorithm?

  - by Col. Shrapnel

  Well, from the discussion of hashing methods weaknesses, I've got that the only ol' good brute-force is efficient to break. So, the question is: Is there a hashing algorithm which is more steady against brute-force than others?

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• Is it possible to use 'else' in a python list comprehension?

  - by Josh

  Here is the code I was trying to turn into a list comprehension: table = '' for index in xrange(256): if index in ords_to_keep: table += chr(index) else: table += replace_with Is there a way to add the else statement to this comprehension? table = ''.join(chr(index) for index in xrange(15) if index in ords_to_keep) Also, would I be right in concluding that a list comprehension is the most efficient way to do this?

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• Embedding Flash & Quicktime Via JavaScript

  - by thesunneversets

  I have a JavaScript function that loads a flash movie into a webpage div using swfobject.embedSWF(). I want to be able to, alternatively, load a .mov file into the same div, in the event that this is the file found instead of the .swf. Is there a close equivalent to swfobject.embedSWF for the purposes of embedding a .mov file? If not, what is an efficient route to doing this using JavaScript?

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• What is the best way to create continuously looping background in iPhone SDK ?

  - by catpad

  What is the best way to create a continuously looping background using iPhone SDK so that it seems the foreground object is in perpetual motion ? I have a background image which I want to move continuously at a given speed from right to left and seamlessly start displaying the beginning of the image when its end is reached. What is the best, most efficient way to do it to avoid any jumps and get optimal performance ?

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• Why do updates inside of a SQL transaction still need disk IO?

  - by usr

  In SQL Profiler you can see that very simple updates to a table by primary key take about 10-30ms each. On about every 10th update the write column shows 1, on all other updates it shows 0. This must mean that about every 10th update statement still requires disk IO. I wonder why that is. Would it not be more efficient queue up all IO until the transaction commits?

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