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• How to read from database and write into text file with C#?

  - by user147685

  How to read from database and write into text file? I want to write/copy (not sure what to call) the record inside my database into a text file. One row record in database is equal to one line in the text file. I'm having no problem in database. For creating text file, it mentions FileStream and StreamWriter. Which one should I use?

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• Problem with computed column with NDBUnit

  - by jess

  Hi, I am loading data for tests in tables using xml and ndbunit.But,for a table having computed column,I am having problem.I get this error The column "xyz" cannot be modified because it is either a computed column or is the result of a UNION operator. I have modified the INSERT and UPDATE commands(removed the computed column) of sqladapter in xsd file,but still face the issue. thanks

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• How do you make cin typesafe?

  - by cactusbin

  It is well known that cin is not typesafe (e.g. cin integer; and entering "fifty five" will cause it to flip out). I have seen many not-so-elegant ways to hand this, such as getlining a string and using sstream to convert it to a number, or looping with cin.fail() and clearing the stream and reentering it, etc. Is there any library or anyway to overload the inserter operator to make cin automatically typesafe?

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• How to calculate the following Friday at 3am?

  - by Mark

  How can you calculate the following Friday at 3am as a datetime object? Clarification: i.e., the calculated date should always be greater than 7 days away, and less than or equal to 14.

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• Math operation in Java

  - by joroj

  Hello, what "^" operator does? when I try this: int a = 5^n; it gives me: for n = 5, returns 0 for n = 4, returns 1 for n = 6, returns 3 What is this?

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• How can I perform an idiomatic non-recursive flatten in ruby?

  - by nasmorn

  I have a method that returns an array of arrays. For convenience I use collect on a collection to gather them together. arr = collection.collect {|item| item.get_array_of_arrays} Now I would like to have a single array that contains all the arrays. Of course I can loop over the array and use the + operator to do that. newarr = [] arr.each {|item| newarr += item} But this is kind of ugly, is there a better way?

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• MySQL name LIKE '%#attributes.q#%' --- Doesn't return result for an exact match?

  - by nobosh

  I have the following MySQL query: SELECT * FROM customer WHERE fName LIKE '%#attributes.q#%' AND deleted = 'N' OR lName LIKE '%#attributes.q#%' AND deleted = 'N' This works fine for guesses, but if you provide an exact match: "Bill Clinton" fname=bill lname = clinton to the query above you get 0 results? How can this query be updated to say find LIKE result and EQUAL TO results?

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• LINQ Single vs First

  - by BahaiResearch.com

  LINQ: Is it more efficient to use the Single() operator over First() when ever I know for certain that the query will return a single record? Is there a difference?

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• ContentLength vs Actual File.Length

  - by Jojo

  Does anyone has any experience wherein the requested file to download (HTTP) content length in the header does not equal to the actual file length (size) when downloaded?

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• Python: How do sets work

  - by Guy

  I have a list of objects which I want to turn into a set. My objects contain a few fields that some of which are o.id and o.area. I want two objects to be equal if these two fields are the same. ie: o1==o2 if and only if o1.area==o2.area and o1.id==o2.id. I tried over-writing __eq__ and __cmp__ but I get the error: TypeError: unhashable instance. What should I over-write?

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• Filter tweets by client name

  - by Ido Shilon

  I'm trying to filter tweets results by client name like - using source operator. I'm trying to do it with a a client named "single platform" , to get tweets like http://twitter.com/#!/phoenixparknyc/status/43340419475570688 but the search doesn't seems to work (tried with quotes as well) http://twitter.com/#!/search/source%3Asingle%20platform%20Specials%2FEvents%20 Any idea how to make the search works ?

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• How to find a random point in a quadrangle?

  - by Gregg Cleland

  Hi! I have to be able to set a random location for a waypoint for a flight sim. The maths challenge is straightforward: "To find a single random location within a quadrangle, where there's an equal chance of the point being at any location." Visually like this: http://screencast.com/t/NTUxMzJhZGQ An example ABCD quadrangle is: A:[21417.78 37105.97] B:[38197.32 24009.74] C:[1364.19 2455.54] D:[1227.77 37378.81] Thanks in advance for any help you can provide. :-)

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• Do tools exist wich automatically find copy-and-paste code?

  - by java.is.for.desktop

  Hello! Are there tools out there which could automatically find copy-and-paste code among a set of files? I was thinking of writing a script for this, which would just search for equal strings, but such script would find mostly irrelevant equalities. (Such as private final static ...).

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• Dynamic variable name in python

  - by PhilGo20

  I'd like to call a query with a field name filter that I wont know before run time... Not sure how to construct the variable name ...Or maybe I am tired. field_name = funct() locations = Locations.objects.filter(field_name__lte=arg1) where if funct() returns name would equal to locations = Locations.objects.filter(name__lte=arg1) Not sure how to do that ...

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• Is there any jquery plugin for this image gallery navigation?

  - by Pandiya Chendur

  I have some 20 images of equal width and height..... See the below image I want my plugin to navigate through these image when clicking on upo and down arrow with smooth scroll.... Any suggestion....

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• How to implement == or >= operators for generic type

  - by momsd

  I have a generic type Foo which has a internal generic class Boo. Boo class a property Value of type K. In a method inside Foo i want to do a boo.Value >= value Note that second operand value is of type T. while compiling i am getting following error: Operator '=' cannot be applied to operands of type 'T' and 'T' Can anyone please tell me whats the problem here?

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• Is there a way to combine IN and LIKE in MySQL?

  - by abeger

  I'm currently running a query like this: SELECT * FROM email WHERE email_address LIKE 'ajones@%' OR email_address LIKE 'bsmith@%' OR email_address LIKE 'cjohnson@%' The large number of OR's bothers me. Is there a way to condense this up with something akin to an IN operator, e.g.: SELECT * FROM email WHERE email_address LIKE ('ajones@%', 'bsmith@%', 'cjohnson@%') Or is this just wishful thinking?

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• sql "Group By" and "Having"

  - by Hans Rudel

  im trying to work through some questions and im not sure how to do the following Q:Find the hard drive sizes that are equal among two or more PCs. its q15 on this site http://www.sql-ex.ru/learn_exercises.php#answer_ref The database scheme consists of four tables: Product(maker, model, type) PC(code, model, speed, ram, hd, cd, price) Laptop(code, model, speed, ram, hd, screen, price) Printer(code, model, color, type, price) any pointers would be appreciated.

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• How do I write a Oracle SQl query for this tricky question...

  - by atrueguy

  Here is the table data with the column name as Ships. +--------------+ Ships | +--------------+ Duke of north | ---------------+ Prince of Wales| ---------------+ Baltic | ---------------+ In the Outcomes table, transform names of the ships containing more than one space, as follows: Replace all characters between the first and the last spaces (excluding these spaces) by symbols of an asterisk (*). The number of asterisks must be equal to number

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• select only rows if its value in a particular column is less than its value in the other column

  - by bazon

  Hi folks, I am using R and need to select rows with aged (age of death) less than or equal to laclen (lactation length). df: id1 id2 laclen aged 9830 64526 26 6 days 7609 64547 28 0 days 9925 64551 3 0 days 9922 64551 3 5 days 9916 64551 3 8 days 9917 64551 3 8 days 9914 64551 3 9 days Any help would be appreciated! Bazon

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• Float Conversion Issue

  - by user1407570

  I have an issue after converted a float from a string, the result of my operation is null The NSLogs give the right value but vitesseMoyenne is equal to null -(void)setVitesseMoyenne:(float)uneDistanceTotale:(NSString*)unTempsTotal { //float tempEnFloat = [unTempsTotal floatValue]; NSLog(@"%@",unTempsTotal); float calculVitesseMoyenne = uneDistanceTotale / [unTempsTotal floatValue]; NSLog(@"%f",calculVitesseMoyenne); vitesseMoyenne = [NSString stringWithFormat:@"%f", calculVitesseMoyenne]; } Can you see what is wrong ?

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• remove duplicate from different columns in mssql 2000

  - by user312549

  i have table : number city1 city2 mentions 1 a b 5 1 b a 5 1 c d 2 1 d c 2 what i need is to remove duplicate records, such as a, b equal to b,a became : number city1 city2 mentions 1 a b 5 1 c d 2 any clue for me ? thanks before :)

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• How to load only selected column values via jqGrid?

  - by hivehicks

  When I try to pass less values from a server than there are columns on a client side, I get an alert saying it must be equal. How can I pass less values from a server? Other columns I'm planning to fill programmatically on a client side.

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• Getting value depedning on two boolean attrinutes.[Nested ifs]

  - by uswaretech

  I have two fields start_time end_time - can be null Now, depending on this I needs to differentiate between three states Scheduled in future, Currently running Completed in past Since mysql IF operator can not be nested, (Or I cant find an easy way to nest them), I cant find how to get the three state status.

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• Size of abstract class

  - by webgenius

  How can I find the size of an abstract class? class A { virtual void PureVirtualFunction() = 0; }; Since this is an abstract class, I can't create objects of this class. How will I be able to find the size of the abstract class A using the 'sizeof' operator?

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