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• C# vs C - Big performance difference

  - by John

  I'm finding massive performance differences between similar code in C anc C#. The C code is: #include <stdio.h> #include <time.h> #include <math.h> main() { int i; double root; clock_t start = clock(); for (i = 0 ; i <= 100000000; i++){ root = sqrt(i); } printf("Time elapsed: %f\n",…

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• set difference in SQL query

  - by TheObserver

  I'm trying to select records with a statement SELECT * FROM A WHERE LEFT(B, 5) IN (SELECT * FROM (SELECT LEFT(A.B,5), COUNT(DISTINCT A.C) c_count FROM A GROUP BY LEFT(B,5) ) p1 WHERE p1.c_count = 1 ) AND C IN (SELECT * FROM (SELECT A.C , COUNT(DISTINCT…

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• pylab.savefig() and pylab.show() image difference

  - by Jack1990

  I'm making an script to automatically create plots from .xvg files, but there's a problem when I'm trying to use pylab's savefig() method. Using pylab.show() and saving from there, everything's fine. Using pylab.show() Using pylab.savefig() def producePlot(timestep, energy_values,type_line = 'r', jump = 1,finish = 100): fc…

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• the difference between Max Heap and sorted stack

  - by matin1234

  Hi I want to know that when we can sort a stack with a Collections.sort method so why we need a new data structure like max heap?thanks

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• Difference in F# and Clojure when calling redefined functions

  - by Michiel Borkent

  In F#: > let f x = x + 2;; val f : int -> int > let g x = f x;; val g : int -> int > g 10;; val it : int = 12 > let f x = x + 3;; val f : int -> int > g 10;; val it : int = 12 In Clojure: 1:1 user=> (defn f [x] (+ x 2)) #'user/f 1:2 user=> (defn g [x] (f x)) #'user/g 1:3 user=> (g 10) 12 1:4…

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• SQL: Find difference between dates with grouping

  - by ajbeaven

  I have a problem that seems similar to this fellow - I just want to display the data slightly differently. I'm pretty terrible with SQL so can't modify it to suit, but perhaps someone else can. My table looks similar to this (date format is dd/mm/yyyy): ID User Date_start Role 1 Andy 01/04/2010 A 2 Andy 10/04/2010 B 3…

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• difference between "=null" and "is null" in sql server 2008

  - by user329820

  Hi I asked the same question in this forum but I want to know that is there any differnce between "=null" and "is null" in sql server 2008? thanks

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• What is the difference b/n pre-increment and functional argument is pre-increment

  - by thulasi

  main() { int a=1; void xyz(int,int); xyz(++a,a++); printf("%d",a); } void xyz(int x,int y) { printf("\n%d %d",x,y); }

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• Weird SQL Server 2005 Collation difference between varchar() and nvarchar()

  - by richardtallent

  Can someone please explain this: SELECT CASE WHEN CAST('iX' AS nvarchar(20)) > CAST('-X' AS nvarchar(20)) THEN 1 ELSE 0 END, CASE WHEN CAST('iX' AS varchar(20)) > CAST('-X' AS varchar(20)) THEN 1 ELSE 0 END Results: 0 1 SELECT CASE WHEN CAST('i' AS nvarchar(20)) > CAST('-' AS nvarchar(20))…

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• Difference in regex between Python and Rubular?

  - by Rosarch

  In Rubular, I have created a regular expression: (Prerequisite|Recommended): (\w|-| )* It matches the bolded: Recommended: good comfort level with computers and some of the arts. Summer. 2 credits. Prerequisite: pre-freshman standing or permission of instructor. Credit may not be applied toward engineering…

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• What is difference between my atoi() calls?

  - by Lucas

  I have a big number stored in a string and try to extract a single digit. But what are the differences between those calls? #include <iostream> #include <string> int main(){ std::string bigNumber = "93485720394857230"; char tmp = bigNumber.at(5); int digit = atoi(&tmp); int digit2 =…

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• Activator.CreateInstance(string) and Activator.CreateInstance<T>() difference

  - by Juan Manuel Formoso

  No, this is not a question about generics. I have a Factory pattern with several classes with internal constructors (I don't want them being instantiated if not through the factory). My problem is that CreateInstance fails with a "No parameterless constructor defined for this object" error unless I pass "true" on…

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• What is the major difference between GridView/DetailsView/FormView in ASP.net

  - by balaweblog

  GridView/DetailView/FormView will be used for displaying tabular data. Let me know about what are the differences these three also where we use?

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• Difference between sql, pl/sql and sqlj

  - by rao.rohan84@aol.in

  I want to know how do the 3 compare with one another? which one to use when? which can be used as a replacement of other?

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• SQL Server 2008 - Difference between time(0)

  - by lugeno

  I've a table with working_hours time(0), lunch_hours time(0) What I have to do is the following: If lunch_hours is greater that one hour, I have to calculate the offset Example: lounch_hour = 01:30:00 = offset = 00:30:00 Once done I've to subtract the offset from the working_hours value Example: offset =…

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• C#, WindowsForms difference to simple Console App

  - by daemonfire300

  Hi there, I currently started to "port" my console projects to WinForms, but it seems I am badly failing doing that. I am simply used to a console structure: I got my classes interacting with each other depending on the input coming from the console. A simple flow: Input -> ProcessInput -> Execute…

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• Difference between Popup's IsOpen and Visibility properties?

  - by cfouche

  I've played around with the WPF Popup Control and as far as I can see, the Visibility property is superfluous. If you have a Popup with IsOpen = True, it will be visible even if its Visibility = Collapsed. If you have a Popup with IsOpen = False, then its Visibility will be Collapsed, and will remain…

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• Difference of two 'uint'

  - by vanslly

  When you attempt to declare an unsigned variable in C#.NET with a value outside its value range it is flagged as a compiler error, but if you produce a negative value at runtime and assign it to that variable at runtime the value wraps. uint z = -1; // Will not compile uint a = 5; uint b = 6; uint c…

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• regarding difference between siebel crm and microsoft dynamic crm

  - by anees

  hi every now i would like to learn one cource.i think to learn any CRM cource that i seither SIEBEL CRM or DYNAMIC CRM but which one is better to learn and in which one jobs r good .plz could some plz suggest me .thanks

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• What's the difference between utf8_general_ci and utf8_unicode_ci

  - by KahWee

  Between utf8_general_ci and utf8_unicode_ci, are there any differences in terms of performance?

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• C++ whats the difference between uint64 and *uint64?

  - by James Moore

  Hey there. Why does: uint64 = 140734799798420 and *unit64 = 7004431430466964258 Thanks

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• One hour difference in Python

  - by Joel

  Hello, I have a datetime.datetime property var. I would like to know if it is less than one hour of the current time. Something like var.hour<datetime.datetime.today().hour - 1 Problem with the above syntax is that datetime.datetime.today().hour returns a number such as "10" and it is not…

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• What is the difference between DSA and RSA?

  - by WilliamKF

  It appears they are both encryption algorithms that require public and private keys. Why would I pick one versus the other to provide encryption in my client server application?

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• Difference between two commands of fetching Shopping Cart Items in Magento

  - by Knowledge Craving

  In Magento, if you need to get / fetch the Shopping Cart's Item details, you can do it in any of the two possible ways, which will provide you with all the shopped Items in an array:- $cartItems1 = $cart->getQuote()->getAllItems(); $cartItems2 = $cart->getItems()->getData(); But…

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• Performance difference between jQuery's .live('click', fn) and .click(fn)

  - by Mike

  I love the new live event in jQuery 1.3. The question I have is the performance of this event. I know the advantages of using live over click/bind('click') but is there a performance hit for using it over click/bind('click')? If not, why would you ever use click or bind('click')?

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