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  • Database Formatting for Album Tracks

    - by Sev
    I would like to store album's track names in a single field in a database. The number of tracks are arbitrary for each album. Each album is one record in the table. Each track must be linked to a specific URL which also should be stored in the database somewhere. Is it possible to do this by storing them in a single field, or is a relational table for the track names/urls the only way to go?

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  • "Distance" between colours in PHP

    - by Phil
    I'm looking for a function that can accurately represent the distance between two colours as a number or something. For example I am looking to have an array of HEX values or RGB arrays and I want to find the most similar colour in the array for a given colour eg. I pass a function a RGB value and the 'closest' colour in the array is returned

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  • stick button to bottom of element

    - by dzona
    Is there any way to stick child button element to bottom of parent element when number of child elements vary? Parent element is fixed height, and could be scrolled vertically in case of child overflow. In that case, button should be at the end of child list, but in case there is no children, or children size don't push parent element to overflow, it should be at bottom of parent element. Is there pure css solution for this? Thanks

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  • C# Dictionary Performance

    - by derek
    I am using a Dictionary to store data, and will be caching it. I would like to avoid server memory issues, and have good performance by limiting the size of the Dictionary<, either in size or number of entries. What is the best method of doing this? Is there another class I should be considering other than a Dictionary?

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  • Finding the count of characters and numbers in a string

    - by Aspirant
    Hi I have a table test as below NAME --------- abc1234 XYZ12789 a12X8b78Y9c5Z I try to find out the count of number of numbers and characters in the string as select name,length(replace(translate(lower(name),'abcdefghijklmnopqrstuvwxyz',' '),' ','')) as char_count, length(replace(translate(name,'1234567890',' '),' ','')) as num_count from test6; Its executing fine giving the output NAME CHAR_COUNT NUM_COUNT abc1234 4 3 XYZ12789 5 3 a12X8b78Y9c5Z 7 6 But my question is there any option by not giving the abcdefghijklmnopqrstuvwxyz and 1234567890 manually

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  • Using C# to read/write from excel spreadsheet.

    - by Aaron
    Hi there, I need to make a program that writes some data to an excel spreadsheet. Something basic along the lines of First name, last name, phone number, e-mail per row with each category in its own column. I don't even know where to start. If someone could tell me which assemblies to reference and maybe point me to a website or a book that covers writing/reading data from an excel spreadsheet via a c# program that would be great. Many thanks.

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  • WPF format displayed text?

    - by Mark
    I have a column defined like this: <DataGridTextColumn Binding="{Binding Path=FileSizeBytes, Mode=OneWay}" Header="Size" IsReadOnly="True" /> But instead of displaying the file size as a big number, I'd like to display units, but still have it sort by the actual FileSizeBytes. Is there some way I can run it through a function or something before displaying it?

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  • dropping characters from regular expression groups

    - by tcurdt
    The goal: I want to convert a number from the format "10.234,56" to "10234.56" Using this simple approach almost gets us there /([\d\.]+),(\d\d)/ => '\1.\2' The problem is that the first group of the match (of course) still contains the '.' character. So questions are: Is it possible to exclude a character from the group somehow? How would you solve this with a single regexp (I know this is a trivial problem when not using a single regexp)

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  • C# Different class objects in one list

    - by jeah_wicer
    I have looked around some now to find a solution to this problem. I found several ways that could solve it but to be honest I didn't realize which of the ways that would be considered the "right" C# or OOP way of solving it. My goal is not only to solve the problems but also to develop a good set of code standards and I'm fairly sure there's a standard way to handle this problem. Let's say I have 2 types of printer hardwares with their respective classes and ways of communicating: PrinterType1, PrinterType2. I would also like to be able to later on add another type if neccessary. One step up in abstraction those have much in common. It should be possible to send a string to each one of them as an example. They both have variables in common and variables unique to each class. (One for instance communicates via COM-port and has such an object, while the other one communicates via TCP and has such an object). I would however like to just implement a List of all those printers and be able to go through the list and perform things as "Send(string message)" on all Printers regardless of type. I would also like to access variables like "PrinterList[0].Name" that are the same for both objects, however I would also at some places like to access data that is specific to the object itself (For instance in the settings window of the application where the COM-port name is set for one object and the IP/port number for another). So, in short something like: In common: Name Send() Specific to PrinterType1: Port Specific to PrinterType2: IP And I wish to, for instance, do Send() on all objects regardless of type and the number of objects present. I've read about polymorphism, Generics, interfaces and such, but I would like to know how this, in my eyes basic, problem typically would be dealt with in C# (and/or OOP in general). I actually did try to make a base class, but it didn't quite seem right to me. For instance I have no use of a "string Send(string Message)" function in the base class itself. So why would I define one there that needs to be overridden in the derived classes when I would never use the function in the base class ever in the first place? I'm really thankful for any answers. People around here seem very knowledgeable and this place has provided me with many solutions earlier. Now I finally have an account to answer and vote with too. EDIT: To additionally explain, I would also like to be able to access the objects of the actual printertype. For instance the Port variable in PrinterType1 which is a SerialPort object. I would like to access it like: PrinterList[0].Port.Open() and have access to the full range of functionality of the underlaying port. At the same time I would like to call generic functions that work in the same way for the different objects (but with different implementations): foreach (printer in Printers) printer.Send(message)

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  • Find float in a text file

    - by Werner
    Hi, I am trying to find some float number (like -1234.5678) in a huge text file using grep, so I thought about: grep -n '-1234.5678' but I get errors, do you know what is the right way using grep and why? there is anything easier? Thanks

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  • C++ Arrays manipulations (python-like operations)

    - by Linai
    Hi Guys, I'm trying to figure out the best C++ library/package for array manipulations in a manner of python. Basically I need a simplicity like this: values = numpy.array(inp.data) idx1 = numpy.where(values > -2.14) idx2 = numpy.where(values < 2.0) res1 = (values[idx1] - diff1)/1000 res1 = (values[idx2] - diff2)*1000 In python it's just 5 lines, but the simplest way in C++ i can think of is quite a number of nested loops. Pls advise..

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  • ruby sortby 3rd element in a multidimential array npot working properly

    - by Steven
    Hi, I'm using ruby to sort an array where each element in the array is another array. I have this: Data = Data.SortBy { |Info| info[3] } example data in this column: 3.1 2 5.65 -1 0.4 -9.43 -10.87 -2.3 It should sort this into: 5.65 3.1 2 0.4 -1 -2.3 -9.43 -10.87 But it comes out like this: 5.65 3.1 2 0.4 -1 -10.87 -2.3 -9.43 It's only comparing the first char of the float... not the whole number?

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  • Count # of links programmatically

    - by Duber
    You know how if you type links: "yourwebsite.com" into the normal google search box, it tells you the number of sites linking to you and their addresses. How can I do it programmatically with php? Does google provide an api that can I can programmatically query? What are my options?

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  • I need to programmatically remove a batch of unique constraints that I don't know the names of.

    - by Bill
    I maintain a product that is installed at multiple locations which as been haphazardly upgraded. Unique constraints were added to a number of tables, but I have no idea what the names are at any particular instance. What I do know is the table/columnname pair that has the unique constraints and I would like to write a script to delete any unique constraint on these column/table combinations. This is MSSQL 2000 and later. Something that works on 2000/2005/2008 would be best!

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  • Type casting int into double C++

    - by user1705380
    I am new to programming and this might be an obvious question, though i cannot for life of me figure out why my program is not returning as a double. I am suppose to write a stocks program that takes in shares of stock, whole dollar portion of price and the fraction portion. And the fraction portion is to be inputted as two int values, and include a function definition with 3 int values.The function returns the price as a double. #include <iostream> using namespace std; int price(int, int, int); int main() { int dollars, numerator, denominator, price1, shares; char ans; do { cout<<"Enter the stock price and the number of shares.\n"; cout<<"Enter the price and integers: Dollars, numerator, denominator\n"; cin>>dollars>>numerator>>denominator; cout<<"Enter the number of shares held\n"; cin>>shares; cout<<shares; price1 = price(dollars,numerator,denominator); cout<<" shares of stock with market price of "; cout<< dollars << " " << numerator<<'/'<<denominator<<endl; cout<<"have a value of " << shares * price1<<endl; cout<<"Enter either Y/y to continue"; cin>>ans; }while (ans == 'Y' || ans == 'y'); system("pause"); return 0; } int price(int dollars, int numerator, int denominator) { return dollars + numerator/static_cast<double>(denominator); }

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  • EndOfStreamException caused by spammer (c#/asp.net)

    - by maxp
    I have a contact page on my site that seems to have been latched on to by a spammer. The error itself is: System.IO.EndOfStreamException: Unable to read beyond the end of the stream. at System.IO.BinaryReader.ReadByte() at System.Web.UI.ObjectStateFormatter.DeserializeIndexedString(SerializerBinaryReader reader, Byte token) at System.Web.UI.ObjectStateFormatter.DeserializeValue(SerializerBinaryReader reader) Google turns up little. I assume they are submitting an invalid viewstate, but the exception has no line number so im stumped.

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  • is there a way to condense a vector (C++)?

    - by zebraman
    I have a sparsely populated vector that I populated via hashing, so elements are scattered randomly in the vector. Now what I want to do is iterate over every element in that vector. What I had in mind was essentially condensing the vector to fit the number of elements present, removing any empty spaces. Is there a way I can do this?

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