Re: what is the regular expression that matches nothing? -- I think it i

help-gnu-utils

From:	me
Subject:	Re: what is the regular expression that matches nothing? -- I think it is the null expression. When I do "egrep '' somefile" the result is the same as when I do "cat somefile". The result of "egrep -v '' somefile" is, as expected, nothing. HTH
Date:	23 Dec 2004 21:36:09 GMT

Randy Yates wrote:
> For use in the xemacs package "efs."

Ah! Sorry, I didn't notice this part.
I don't know xemacs.

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what is the regular expression that matches nothing?, Randy Yates, 2004/12/23
- Re: what is the regular expression that matches nothing? -- I think it is the null expression. When I do "egrep '' somefile" the result is the same as when I do "cat somefile". The result of "egrep -v '' somefile" is, as expected, nothing. HTH, me <=
  - Re: what is the regular expression that matches nothing? -- I think it is the null expression. When I do "egrep '' somefile" the result is the same as when I do "cat somefile". The result of "egrep -v '' somefile" is, as expected, nothing. HTH, Randy Yates, 2004/12/23
- Re: what is the regular expression that matches nothing?, Paul Jarc, 2004/12/27