Regular expression to match camel case string

[A-Z]([A-Z0-9]*[a-z][a-z0-9]*[A-Z]|[a-z0-9]*[A-Z][A-Z0-9]*[a-z])[A-Za-z0-9]*

See also:

• http://stackoverflow.com/questions/1128305/regular-expression-to-identify-camelcased-words