пятница, 27 декабря 2013 г.

What's the best way to create a short hash, similiar to what tiny Url does?

.NET string object has a GetHashCode() function. It returns an integer. Convert it into a hex and then to an 8 characters long string.
Like so:
string hashCode = String.Format("{0:X}", sourceString.GetHashCode());
UPDATE: Added the remarks from the link above to this answer:
The behavior of GetHashCode is dependent on its implementation, which might change from one version of the common language runtime to another. A reason why this might happen is to improve the performance of GetHashCode.
If two string objects are equal, the GetHashCode method returns identical values. However, there is not a unique hash code value for each unique string value. Different strings can return the same hash code.
Notes to Callers
The value returned by GetHashCode is platform-dependent. It differs on the 32-bit and 64-bit versions of the .NET Framework.

Комментариев нет: