So will this
(^|\.)redshift3d\.com$
I know it will match
But what about
On Sat, 8 Jul 2023, 22:32 Alex Rousskov, <rousskov@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On 7/8/23 06:14, Stuart Henderson wrote:
> On 2023-07-07, robert k Wild <robertkwild@xxxxxxxxx> wrote:
>> --===============6398075081121841451==
>> Content-Type: multipart/alternative; boundary="000000000000a03dcc05ffeb4428"
>>
>> --000000000000a03dcc05ffeb4428
>> Content-Type: text/plain; charset="UTF-8"
>>
>> hi all,
>>
>> i know ive been talking about this before but i want to understand why i
>> cant use this regex
>>
>> (^|.*)redshift3d.com$
>
> this matches anythingredshift3d[any single character or nothing]com
Correction: A regular _expression_ "." does _not_ match "nothing" (i.e.
zero characters).
In some contexts, "." may not even match some special single characters,
but those contexts are probably not applicable to this thread scope.
>> instead i have to use this
>>
>> (^|\.)redshift3d.com$ OR
>
> this matches redshift3d[any single character or nothing]com
> or anything.redshift3d[any single character or nothing]com
... or .redshift3d.com
Same "nothing" correction here.
>> (^|\.)redshift3d\.com$
>
> this only matches redshift3d.com or anything.redshift3d.com
... or .redshift3d.com
Alex.
> So, if you only want to match on things exactly in the redshift3d.com
> domain and no others, you need the last one.
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