[ale] regex question?

[Joseph A Knapka]

Fletch wrote:
> 
> >>>>> "Joseph" == Joseph A Knapka <Joseph> writes:
> 
>     Joseph> Fletch wrote:
>     >>  >>>>> "esoteric" == esoteric <Geoffrey> writes:
>     >>
>     >> [...]
>     >>
>     >> >> '03/(19|20)/02'
> 
>     Joseph> This will match 03/120/02 or 03/190/02. Re operators bind
> 
> lemur:~ 448> echo '03/19/02' | egrep '03/(19|20)/02'                   12:10:04
> 03/19/02
> lemur:~ 449> echo '03/190/02' | egrep '03/(19|20)/02'                  12:11:19
> lemur:~ 450> echo '03/120/02' | egrep '03/(19|20)/02'            < 1 > 12:11:23
> lemur:~ 451> echo '03/20/02' | egrep '03/(19|20)/02'             < 1 > 12:11:33
> 03/20/02
> lemur:~ 452> echo '03/12/02' | egrep '03/(19|20)/02'                   12:11:39
> lemur:~ 453>                                                     < 1 > 12:11:40

How interesting. Is this behavior possibly different in
Gnu grep vs other greps? For some reason I got into the
habit a long time ago of always explicitly parenthesizing
stuff that I used on either side of the | operator.
Apparently that's just an entrenched habit that has
no basis in reality, but I can't understand now why
I developed the habit.

Oh well.

Cheers,
-- Joe
  Using open-source software: free.
  Pissing Bill Gates off: priceless.

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