this is the best i’ve come up with
%r/^(?!.*)$/m
comments?
-a
Hi –
On Fri, 16 Dec 2005, [email protected] wrote:
this is the best i’ve come up with
%r/^(?!.*)$/m
How about:
/[^\w\W]/
David
–
David A. Black
[email protected]
“Ruby for Rails”, forthcoming from Manning Publications, April 2006!
unknown wrote:
this is the best i’ve come up with
%r/^(?!.*)$/m
%r/\z\A/ ?
On 15/12/05, [email protected] [email protected] wrote:
===============================================================================
| ara [dot] t [dot] howard [at] noaa [dot] gov
| all happiness comes from the desire for others to be happy. all misery
| comes from the desire for oneself to be happy.
| – bodhicaryavatara
/\1/ seems to work.
On Fri, 16 Dec 2005, Mike F. wrote:
unknown wrote:
this is the best i’ve come up with
%r/^(?!.*)$/m
%r/\z\A/ ?
close
irb(main):020:0> “” =~ %r/\z\A/
=> 0
-a
On Fri, 16 Dec 2005, C Erler wrote:
–
/\1/ seems to work.
you win the golf contest i think… that seems to be the shortest
possible…
wow.
-a
[email protected] wrote:
On Fri, 16 Dec 2005, C Erler wrote:
/\1/ seems to work.
you win the golf contest i think… that seems to be the shortest
possible…
Same number of chars:
/.^/
On Fri, Dec 16, 2005 at 05:50:04AM +0900, [email protected] wrote:
Same number of chars:
/.^/
it’s ‘smaller’ too…
. . . and “cuter”.
–
Chad P. [ CCD CopyWrite | http://ccd.apotheon.org ]
unix virus: If you’re using a unixlike OS, please forward
this to 20 others and erase your system partition.
[email protected] wrote:
comments?
I think you mean ‘a regex which doesn’t match anything’; surely
/^$/ is a regex which matches nothing?
mathew
On Fri, 16 Dec 2005, Bob S. wrote:
/.^/
it’s ‘smaller’ too…
-a
On Dec 16, 2005, at 3:47 PM, mathew wrote:
[email protected] wrote:
comments?
I think you mean ‘a regex which doesn’t match anything’; surely
/^$/ is a regex which matches nothing?
No, he meant a regex that always fails.
Yours matches empty lines.
James Edward G. II
On Sat, 17 Dec 2005, James Edward G. II wrote:
On Dec 16, 2005, at 3:47 PM, mathew wrote:
[email protected] wrote:
comments?
I think you mean ‘a regex which doesn’t match anything’; surely
/^$/ is a regex which matches nothing?No, he meant a regex that always fails.
lol!
ok. before this gets out of hand, what i meant was
regex =~ any_possible_string #=> false
kind regards.
-a
On Sat, 17 Dec 2005, mathew wrote:
[email protected] wrote:
comments?
I think you mean ‘a regex which doesn’t match anything’; surely
/^$/ is a regex which matches nothing?
indeed i did - but i thought that a subject like that would lead to
people
skiiming it and thinking i was having problems with my regex - that it
didn’t
match anything!
whose on first?
-a
In article [email protected],
[email protected] wrote:
No, he meant a regex that always fails.
lol!
ok. before this gets out of hand, what i meant was
regex =~ any_possible_string #=> false
That never happens in Ruby. =~ returns nil if the expression
and the string passed to it do not match.
I would guess that it should be possible to put all possible characters
between [ and ], and negate that.
I think /\z\a/ should do the trick, too (from experimentation, I can not
find anything that matches it, but maybe I haven’t thought/experimented
enough about/with it)
Finally, I think one can to build a not-too-long regex that only matches
strings of length larger than addressable memory, using something like:
/((x{1000000000}){1000000000}){1000000000}/
If you repeat that pattern a couple of times you get a regular
expression that, for all practical purposes, will match nothing.
Reinder