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How many database indexes is too many?
I'm working on a project with a rather large Oracle database (although my question applies equally well to other databases). We have a web interface which allows users to search on almost any possible combination of fields.
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Where to put include statements, header or source?
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Only put includes in a header if the header itself needs them.
Examples:
Your function returns type size_t. Then #include <stddef.h> in the header file.
Your function uses strlen. Then #include <string.h> in the source file.
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Parse string to DateTime in C#
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DateTime.Parse() will try figure out the format of the given date, and it usually does a good job. If you can guarantee dates will always be in a given format then you can use ParseExact():
string s = "2011-03-21 13:26";
DateTime dt =
DateTime.ParseExact(s, "yyyy-MM-dd HH:mm", CultureInfo...
Getting the application's directory from a WPF application
I found solutions for Windows Forms with AppDomain but what would be the equivalent for a WPF Application object?
8 Answe...
What is [Serializable] and when should I use it?
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What is it?
When you create an object in a .Net framework application, you don't need to think about how the data is stored in memory. Because the .Net Framework takes care of that for you. However, if you want to store the contents ...
Encrypt Password in Configuration Files? [closed]
...to encrypt and decrypt a text by using a password.
This basically means initializing a javax.crypto.Cipher with algorithm "AES/CBC/PKCS5Padding" and getting a key from javax.crypto.SecretKeyFactory with the "PBKDF2WithHmacSHA512" algorithm.
Here is a code example (updated to replace the less secur...
Difference between Covariance & Contra-variance
... are properties of a mapping function that associates one member of a set with another. More specifically, a mapping can be covariant or contravariant with respect to a relation on that set.
Consider the following two subsets of the set of all C# types. First:
{ Animal,
Tiger,
Fruit,
Bana...
How do I get rid of “[some event] never used” compiler warnings in Visual Studio?
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This appears to be warning 67 and can thus be suppressed with:
#pragma warning disable 67
Don't forget to restore it as soon as possible (after the event declaration) with:
#pragma warning restore 67
However, I'd check again and make sure you're raising the event somewhere, ...
Can you animate a height change on a UITableViewCell when selected?
I'm using a UITableView in my iPhone app, and I have a list of people that belong to a group. I would like it so that when the user clicks on a particular person (thus selecting the cell), the cell grows in height to display several UI controls for editing the properties of that person.
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Soft hyphen in HTML ( vs. ­)
How do you solve the problem with soft hyphens on your web pages? In a text there can be long words which you might want to line break with a hyphen. But you do not want the hyphen to show if the whole word is on the same line.
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