There's a good discussion at the following URL but it occurs because the
regular expression is evaluated as a state machine. Here the capturing group
itself is repeated by the {2}. The first match is discarded when it sees the
second match and that's what you see in the results.
https://www.regular-expressions.info/captureall.html
<https://www.regular-expressions.info/captureall.html>
[fletcher]
> On Mar 6, 2020, at 7:25 PM, Howard <[email protected]> wrote:
>
> When using the Pattern Playground, in the search pattern's capture group #1
> (see below), why is `847-` appearing rather than `717-`?
>
> Search pattern: (\d{3}[.-]?){2}
>
> Source text: 717-847-8015
>
> Capture Groups:
> #0: 717-847-
> #1: 847-
>
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