Eliminate duplicates in string array

[_eddie_]

I'm building an array of strings on the fly from a database. What is
the best method for eliminating duplicates? (I can do this before or
after the strings are added to the array)

[Justin Rogers]

An easy method

Hashtable strings = new Hashtable();
// Add strings to strings, using strings[stringName]
ArrayList stringArray = new ArrayList(strings.Keys);

You can stay with the string array or convert it down to an actual array.
--
Justin Rogers
DigiTec Web Consultants, LLC.
Blog: http://weblogs.asp.net/justin_rogers

"_eddie_" <_nomail_@_nospam_.com> wrote in message
news:5d********************************@4ax.com...

I'm building an array of strings on the fly from a database. What is
the best method for eliminating duplicates? (I can do this before or
after the strings are added to the array)

[Erik Frey]

"_eddie_" <_nomail_@_nospam_.com> wrote in message
news:5d********************************@4ax.com...

I'm building an array of strings on the fly from a database. What is
the best method for eliminating duplicates? (I can do this before or
after the strings are added to the array)

There's a number of ways to do it. Here's a simple one:

System.Collections.ArrayList a;
for ( ... )
{
if (!a.Contains(value))
a.Add(value);
}
return (string[]) a.ToArray(typeof(string));

Erik

[_eddie_]

On Mon, 2 Feb 2004 22:28:51 -0800, "Justin Rogers"
<Ju****@games4dotnet.com> wrote:

An easy method

Hashtable strings = new Hashtable();
// Add strings to strings, using strings[stringName]
ArrayList stringArray = new ArrayList(strings.Keys);

You can stay with the string array or convert it down to an actual array.

Perfect. I had tried a hashtable, but I had more steps than necessary
(which may have accounted for some of the speed problems).

Thanks, Justin.
e