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• LINQ to group objects according to timestamp

  - by Benny

  I have a serial of object defined as: public class Foo { public DateTime Time {get;set;} } now I want to group objects(IEnumerable<Foo>) according to the time, e.g. I want to group them according to hour or day or month. for example (group into hour): group 1(13:00-14:00) : foo1, foo2, foo3 group 2(14:00-15:00): foo4, foo5 How to write LINQ over this? hope I made myself clear.

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• Splitting a list in python

  - by mglmnc

  Hey im new to python. How do you get a portion of a list by the relative value of its sorting key. example... list = [11,12,13,14,15,16,1,2,3,4,5,6,7,8,9,10] list.sort() newList = list.split("all numbers that are over 13") assert newList == [14,15,16]

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• Cast string with coma to float with dot

  - by hsz

  Hello ! When I try to cast $value = floatval('14,5833'); to a float type I expect a value with dot like 14.5833 but it returns me 14,5833. How should I do this ? I wouldn't like to use any string replace functions.

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• Oracle query to select rows with unique code

  - by Jasim

  I have a table like this C1 C2 C3 Code 1 2 3 33 1 2 3 34 2 4 1 14 1 2 3 14 i want to select only those record whose code is appearing only in single row. ie, in this case rows with code 33 and 34.. as they appear only once in this table. How can i write a query for that

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• [Python] OR in regular expression?

  - by www.yegorov-p.ru

  Hello. I have text file with several thousands lines. I want to parse this file into database and decided to write a regexp. Here's part of file: blablabla checked=12 unchecked=1 blablabla unchecked=13 blablabla checked=14 As a result, I would like to get something like (12,1) (0,13) (14,0) Is it possible?

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• How to iterate through a tree in spiral order ???

  - by Nidhi

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 the output in spiral order should be 1 3 2 4 5 6 7 15 14 13 12 11 10 9 8

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• Triple Boot?? Windows 7, Windows 7 and Ubuntu??

  - by BillJeansk

  Hello, currently I have dual boot with 2 windows 7. (dont ask why, long story, I need them for each with different settings involving Audio Recording) I am very keen to install the new Ubuntu and get into a new OS, out of interest but I don't want to mess with my current 2 windows installations? If I install Ubuntu, will this simply add to my list of OS boot options when you set it, like I did when I install my 2nd Windows 7 Any comments or help would be great? Thanks Bill

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• Weird error using preg_match and unicode

  - by Thorpe Obazee

  if (preg_match('(\p{Nd}{4}/\p{Nd}{2}/\p{Nd}{2}/\p{L}+)', '2010/02/14/this-is-something')) { // do stuff } The above code works. However this one doesn't. if (preg_match('/\p{Nd}{4}/\p{Nd}{2}/\p{Nd}{2}/\p{L}+/u', '2010/02/14/this-is-something')) { // do stuff } Maybe someone could shed some light as to why the one below doesn't work. This is the error that is being produced: A PHP Error was encountered Severity: Warning Message: preg_match() [function.preg-match]: Unknown modifier '\'

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• How can I "merge", "flatten" or "pivot" results from a query which returns multiple rows into a sing

  - by dsm

  I have a simple query over a table, which returns results like the following: id id_type id_ref 2702 5 31 2702 16 14 2702 17 3 2702 40 1 2702 26 4 And I would like to merge the results into a single row, for instance: id concatenation 2702 5,16,17,40,26:31,14,3,1,4 Is there any way to do this within a trigger? NB: I know I can use a cursor, but I would really prefer not to unless there is no better way.

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• How can I use the compile time constant __LINE__ in a string?

  - by John

  I can use __LINE__ as a method parameter just fine, but I would like an easy way to use it in a function that uses strings. For instance say I have this: 11 string myTest() 12 { 13 if(!testCondition) 14 return logError("testcondition failed"); 15 } And I want the result of the function to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?

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• Oracle select query

  - by Jasim

  I have a table like this C1 C2 C3 Code 1 2 3 33 1 2 3 34 2 4 1 14 1 2 3 14 i want to select only those record whose code is appearing only in single row. ie, in this case rows with code 33 and 34.. as they appear only once in this table. How can i write a query for that

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• How to convert a string of ints Eg 45 34 21 22 into int's and store them in an array ? in C programm

  - by Srinivasa Varadan

  Hi , I have a string val = "14 22 33 48"; int matrix[5]; I need to insert each of the values in the string into the respective location in the array Eg: matrix[0] = 14; matrix[1] = 22; matrix[2] = 33; matrix[3] = 48; How do I do this ?

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• django DateTimeField list records by day

  - by dotty

  Hay, i have a field in one of my models which saves the creation date of an object created_on = models.DateTimeField(blank=False, auto_now_add=True) This works as expected. In my templates i want to list objects like this June 15 {{ objects here which was created on June 15 }} June 14 {{ objects here which was created on June 14 }} etc Any idea how i would go about doing this? Thanks in advance.

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• C: How to convert a string of ints into actual ints and store them in an array?

  - by Srinivasa Varadan

  I have a string "14 22 33 48". I need to insert each of the values in the string into the respective location in the array: int matrix[5]; so that matrix[0] = 14; matrix[1] = 22; matrix[2] = 33; matrix[3] = 48; How do I do this?

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• best SEO method for date in url structure? [closed]

  - by Haroldo

  I'm working on an events website so dates are very important search terms, ie: 'whats on on fri 14th september' I've seen it done in various methods for example: domain/whats-on/city-hall/14-09-2010/event-name.html domain/whats-on/city-hall/2010/09/14/event-name.html the first is 'shallower'. the second could be clearer for google to synonym-ize as a date, has anyone else got any experience or input?

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• How can I "merge" or "flatten" results from a query which returns multiple rows into a single result

  - by dsm

  I have a simple query over a table, which returns results like the following: id id_type id_ref 2702 5 31 2702 16 14 2702 17 3 2702 40 1 2702 26 4 And I would like to merge the results into a single row, for instance: id concatenation 2702 5,16,17,40,26:31,14,3,1,4 Is there any way to do this within a trigger? NB: I know I can use a cursor, but I would really prefer not to unless there is no better way.

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• Fedora vs. Ubuntu for Software-Development Pros/Cons?

  - by Helper Method

  Why is Fedora chosen by so many developers in preference to Ubuntu? I'm using Ubuntu for software development for some time now, and I'm quite happy with it but I'm thinking to give Fedora a try. So, what are the pros/cons for using Fedora for software development?

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• Add badge for tab widget android

  - by user3496459

  I want to add badge for tab widget at android. i use android-viewbadger lib, but i not set badge show to image here code: tabs = (TabWidget) findViewById(android.R.id.tabs); badge = new BadgeView(this, tabs, 2); // badge.setBackgroundResource(R.drawable.badge_28); badge.setBadgePosition(BadgeView.POSITION_TOP_RIGHT); badge.setWidth(14); badge.setHeight(14); badge.show();

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• What's wrong with this Perl regular expression?

  - by neversaint

  I have a lines like this NF419andZNF773 (e=10^-92,). ZNF571 (e=2 10^-14,) What's the regex for extracting the results above so that it gives NF419andZNF773 - 10^-92 ZNF571 - 2 10^-14 I tried this but fail. $line =~ /(\w+)\s\(e=\s(.*),\)/; print "$1 - $2\n";

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• python count number of times the date has appeared

  - by Rajeev

  From the following array,how to count the dates for the number of times it has occured in the array.The output should be in the following format [date,count] new_dates = [['2012-12-02', 14],['2012-12-03',2],....] Input: dates = [['2012-12-02', 17], ['2012-12-01', 5], ['2012-12-02', 15], ['2012-12-02', 8], ['2012-12-02', 17], ['2012-12-02', 15], ['2012-12-11', 6], ['2012-12-02', 1], ['2012-12-02', 9], ['2012-12-02', 11], ['2012-12-03', 13], ['2012-12-03', 10], ['2012-12-02', 18], ['2012-12-02', 11], ['2012-12-02', 12], ['2012-12-05', 14], ['2012-12-02', 3], ['2012-12-02', 6], ['2012-12-06', 10], ['2012-12-07', 0], ['2012-12-08', 3], ['2012-12-09', 12], ['2012-12-02', 6]]

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• How to use __LINE__ in a string

  - by John

  Just using it as a method parameter is fine but what about an easy way to use it in strings? For instance say I have this: 11 void myTest() 12 { 13 if(!testCondition) 14 logError("testcondition failed"); 15 } And I want the output to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?

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• How to find sum of elements from given index interval (i, j) in constant time?

  - by Rajendra

  Given an array. How can we find sum of elements in index interval (i, j) in constant time. You are allowed to use extra space. Example: A: 3 2 4 7 1 -2 8 0 -4 2 1 5 6 -1 length = 14 int getsum(int* arr, int i, int j, int len); // suppose int array "arr" is initialized here int sum = getsum(arr, 2, 5, 14); sum should be 10 in constant time.

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• redefinition c++

  - by coubeatczech

  hi, how does header including in c++ work? I have the classes already implemented in .h file and when there is #include in two files, there's this error: files.h:14:7: error: redefinition of ‘class abstract_file’ files.h:14:20: error: previous definition of ‘class abstract_file’ multiple times for each class and enum. Can anyone explain this?

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• how to print numbers using for loop in java?

  - by Balkrushn Viroja

  I have one text box in which I take the value of how many number do you want to print. Now My question is that how can I use for loop so that the number which I want to print is equal to the number that I got from textbox.One more thing is that i want to print only three numbers in one line. i.e. If I got 14 in my text box the result will look like below. 1 2 3 4 5 6 7 8 9 10 11 12 13 14

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• Installation stuck on "Installation Type" screen

  - by Andrew Latham

  I am trying to install Ubuntu 11.10 with Windows 7 from a CD. I am using an HP Pavilion dm4. I've never used Ubuntu (or any Linux) before. Everything goes alright until I get to the "Installation Type" screen. Instead of giving me options, it just has a blank menu, and all the buttons are disabled. When I click "Continue", it gives me an error saying that it can't find the root or something like that. The trial version works fine, but I can't actually install it. Everything on the trial version is really slow, presumably because everything is on the CD or the Windows partition. I did some research, but the only post I could find was http://ubuntuforums.org/showthread.php?t=1870478 Where the only advice is to format the entire drive, which I'm not willing to do. Any suggestions? I'm downloading 10.04 right now and I'm going to try with that instead. EDIT: 10.04 didn't work either. I got to the partitioning screen and got the same problem. I read some more forums, loaded up 11.10 trial from the disk, opened the Terminal and typed sudo apt-get remove dmraid and then y. Then I was actually able to see something on the "Installation type" page: "Erase disk and install Ubuntu" or "Something else". Which is weird, since Windows 7 should be installed. When I click Something Else, I get: /dev/sda /dev/sdb /dev/sdb1 (ntfs) (208 MB) (69 MB used) /dev/sdb2 (ntfs) (477542 MB) (unknown used) /dev/sdb3 (ntfs) (18085 MB) (16094 MB used) /dev/sdb4 (fat32) (4265 MB) (3084 MB used) I have no idea what any of this means. Also, my device for boot loader installation changed from /dev/sda to /dev/sda ATA SAMSUNG MZMPA032 (32.0 GB)

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