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• How to select the last two records for each topic_id in MySQL

  - by Luca Romagnoli

  Hi. I have to select the last two records for every topic. ex: table: msg id | topic_id ------------ 1 | 1 2 | 1 3 | 1 4 | 1 5 | 2 6 | 2 7 | 2 8 | 3 9 | 3 10 | 3 I want to obtain these rows: 3 1 4 1 6 2 7 2 9 3 10 3 How can I do this? thanks

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• korn Shell script to get files between two dates

  - by mad1

  Hi, Need to get the files between two given dates. If there are multiple files on one day get the latest of the files for that day.

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• Have form do two things on submit

  - by Belgin Fish

  Hey, I'm just wondering if it's possible to have a form in html do two things on submit, have the action go to a url like normal (for a search) but also run a mysql command. Thanks!

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• iPad UISplitViewController With Two DetailViewControllers

  - by saikamesh

  Hi, is it possible to have two detail view controllers for a SplitViewController(not with the use of Interface Builder, pure programmatically) or can we add one more splitviewcontroller in place of a splitviewcontroller's detailviewcontroller. If yes, please explain me with an example. Thanks In Advance!

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• Comparing Two Arrays Using Perl

  - by Buzkie

  I have two arrays. I need to check and see if the elements of one appear in the other one. Is there a more efficient way to do it than nested loops? I have a few thousand elements in each and need to run the program frequently. -Alex

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• CGAL: Transformation Matrix for Rotation given two lines/vectors/directions

  - by Vulcan Eager

  How do I generate a transformation matrix for rotating points/others by the angle between two lines/vectors/directions in CGAL? 2D is what I need. 3D is what I love.

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• How to copy plugins between two eclipses

  - by Ron

  I have two eclipse directories, both are Galileo. One has plugin A installed, the another has plugin B. Now I want to have just one eclipse, is it save to just copy the plugins directory from one of the eclipses to the other?

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• Huffman coding two characters as one

  - by Adomas

  Hi, I need huffman code(best in python or in java), which could encode text not by one character (a = 10, b = 11), but by two (ab = 11, ag = 10). Is it possible and if yes, where could i find it, maybe it's somewhere in the internet and i just can'd find it?

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• compare/merge two ms access databases

  - by sprugman

  I've got two ms access .mdb files that I need to compare/merge. Any good tools out there for this? Any way to easily export both to ascii sql where I can use something like Beyond Compare?

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• Deploying two Grails apps on Tomcat ignores one DataSource

  - by John Wheeler

  I have two applications each pointing to a different database. when I deploy these applications to Tomcat at the same time, whichever datasource gets loaded first is the same datasource that gets used for both apps. I am using the latest Tomcat and Grails.

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• Finding out the common / uncommon elements between two Arrays in PHP

  - by Veera

  Consider I have two arrays: $friends = Array('foo', 'bar', 'alpha'); $attendees = Array('foo', 'bar'); Now I need to populate a new array $nonattendees which contains only the elements which are in $friends array and not in $attendees array. i.e, $nonattendees array should be populated with 'alpha'. Is there any in built array operation available in PHP to achieve the above functionality or should I write my own for loops?

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• box around paragraph with one or two vertical lines on the left

  - by Flavius

  Hi What is the easiest way (an environment?) to have a paragraph with one or with two vertical black lines on its left? I have no idea where to start from.

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• how to get only two number after decimal

  - by Manoj Wadhwani

  i have money field in sql table when i m extracting record by table and binding it to datagrid it show money as well 100.0000 four character from decimal i need only two . Plz suggest.

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• splitting lucene index into two halves

  - by Akhil

  what is the best way to split an existing Lucene index into two halves i.e. each split should contain half of the total number of documents in the original index

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• How to wrap two unmannaged C++ functions into two managed C# functions?

  - by Gbps

  I've got two unmanaged C++ functions, Compress and Decompress. The arguments and returns go as followed: unsigned char* Compress (unsigned char*,int) unsigned char* Decompress (unsigned char*,int) Where all uchars are arrays of uchars. Could someone please help me lay out a way to convert these into managed C# code using the Byte[] array instead of unsigned char*? Thank you very much!

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• Enumerator problem, Any way to avoid two loops?

  - by pug

  I have a third party api, which has a class that returns an enumerator for different items in the class. I need to remove an item in that enumerator, so I cannot use "for each". Only option I can think of is to get the count by iterating over the enum and then run a normal for loop to remove the items. Anyone know of a way to avoid the two loops? Thanks

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• compare two following values in numpy array

  - by Billy Mitchell

  What is the best way to touch two following values in an numpy array? example: npdata = np.array([13,15,20,25]) for i in range( len(npdata) ): print npdata[i] - npdata[i+1] this looks really messed up and additionally needs exception code for the last iteration of the loop. any ideas? Thanks!

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• How Does .NET Compiler Compare Two String?

  - by Pankaj

  string a="I am comparing 2 string"; string b="I am comparing 2 string"; if(a==b) return true; else return false; How does a .NET compiler compare two strings? Is string work like a struct or like an int?

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• when ping for two diffrent ip address one after other one of it always fails [closed]

  - by Mukesh

  when ping for two different ip address say 202.177.251.xxx and 59.183.5.yyy one after other one of it always fails. say if i ping one ip address it does not receive packet back and then i ping second one in a loop it receives the packet back though both are connected.

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• Compare two lists.

  - by javaguy

  I want to compare two lists. Since we code to interface using List, which does not inherit the equals from from the Object class. How do I do this?

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• Decoding relationship between two numbers?

  - by Nimbuz

  Is there any way (or calculator) to determine the relationship between two numbers. For example on one the temporary event ID cards, the Unique ID is 20309825 but the barcode when decoded reads 8336902052. What could be the relationship between these numbers, if any? Thanks in advance for your help!

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• biggest of two nos without using relational operator

  - by ratty

  i like to find the greatest of two nos without using < this relational operator. i tired this int a,b; if(a/b==0) { b is greater } else { a is greater } but this not working for negative nos .please help for this

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• Longest common substring from more than two strings - Python

  - by Nicolas Noël

  Hi, I'm looking for a python library for finding the longest common substring from a set of python strings. I'have read that it exist to way to solve this problem : - one using suffix trees - the other using dynamic programming. The method implemented is not important. Otherwise, it is important to have a implementation that can be use for a set of strings and not only two strings Thanks,

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• Silverlight Two Way Data Binding on Key Up

  - by kouPhax

  Is there a way to fire a two way data bind when the key up event fires in Silverlight. Currently I have to lose focus on the textbox to get the binding to fire. <TextBox x:Name="Filter" KeyUp="Filter_KeyUp" Text="{Binding Path=Filter, Mode=TwoWay }"/>

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• Determine the relative compliment of two IEnumerable<T> sets in .net

  - by SFun28

  Hi! Is there an easy way to get the relative compliment of two sets? Perhaps using LINQ? http://en.wikipedia.org/wiki/Complement_(set_theory) I have to find the relative compliment of a set A relative to B. Both A and B are of type HashSet but I think the algorithm could be made more generation (IEnumerable or even ISet)? I could use a solution in either vb.net or C#.

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