Try (for example if character was "A") ...

([^A]|^)A([^A]|$)

This matches four cases:
A is at beginning of string and there is another letter after it,
A has a letter before it and a letter after it,
A is at end of string and there is a letter before it,
or A is the only character in the string.

On 5/16/05, Al <[EMAIL PROTECTED]> wrote:
> What pattern can I use to match ONLY single occurrences of a character in a 
> string.
> 
> e.g., "Some text @ and some mo@@re and [EMAIL PROTECTED], etc @@@.
> 
> I only want the two occurrences with a single occurrence of "@".
> 
> @{1} doesn't work; there are 4 matches.
> 
> Thanks....
> 
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