Thanks, As of ArrayList after reading posts from rbdavidson and Brandon Betances I think ListArrays can be useful, for instance when looping DataSet
On Feb 3, 1:53 pm, Cerebrus <[email protected]> wrote: > Well, I am a person who uses Enums extensively (perhaps, excessively, > if my peers are to be believed ! ) so I could probably give you > hundreds of examples of their use in my daily development. But in > order to illustrate their use, I'd have to show you the code, most of > which is proprietary and copyright. So, I'll try my best to explain... > > I use Enums whenever an object can only have one or more of a definite > set of possible values and nothing else. I like to think of Enums as a > set of constants (differentiated from a single constant). They map > very well with Database constraints where a column can only have a set > of possible values. A common example used to illustrate the concept is > DaysOfWeek or SeasonsInYear or one that I like best : > TypeOfGirlfriend. > > As for ArrayLists, I use them VERY sparingly, if ever. Even as far > back as VS 2002, I used custom strongly typed collections instead of > ArrayLists. As for your example, you are quite right, a string array > would have been much better. It is more than probable that the > facetious example in the book was solely to illustrate the use of > ArrayLists and not a suggestion on preferred usage. A discerning > author would in my opinion have included that disclaimer. > > Hope that clarifies the concept somewhat... feel free to ask if you > need clarifications about something. > > On Feb 3, 8:21 pm, john <[email protected]> wrote: > > > Pardon, I wasn't clear enough.. > > > Well, here is the example from my book: > > Enum Status > > Best = 100 > > Good = 90 > > Bad = 50 > > End Enum > > > So Status.Best can be used to mark someone's work. It's a nice > > example, but most likely I will never use it in my place. > > All our data is loaded from database, so if I would have some marking > > system, most likely, I would have best, good and bad stored somewhere > > in database. I think this is standard. But since enumeration exists, > > someone is using it. I would like to see situations where enumeration > > is the best solution. > > > Same with ArrayList. Here is the example from my notes: > > Dim myArrayList As New ArrayList > > myArrayList.Add("one") > > myArrayList.Add("two") > > myArrayList.Add("three") > > Dim mystring As String = CType(myArrayList.Item(0), String) > > Response.Write(mystring) > > Why not use just regular array of string in this case? Again, in what > > situation ArrayList is considered to be the best solution?
