[vox-tech] regex to detect a range of numbers

[vox-tech@lists.lugod.org]

Well, i thought i had solved that problem by limiting the number of
characters entered to 4, which prevents 17999, but without your
suggestion, they can type 501a, or 501[whatever], and it passes
(obviously).  However, I pasted what you gave me right in and it didn't
work when testing (everything tested seemed to pass).

I came up with this as a possible solution:

/^(50[1-9]|5[1-9][0-9]|[6-9][0-9]{2}|[1][0-7][0-9]{2})$/

I also thought of allowing a comma:

/^(50[1-9]|5[1-9][0-9]|[6-9][0-9]{2}|[1],?[0-7][0-9]{2})$/

Those both seem to be working.  See any problems?

Dave

> Don't you wanna check that a non-digit follows the numbers, since you
> wanna rule out numbers like 17999, which is obviously out of range...?
>
>  (^50[1-9]|^5[1-9][0-9]|^[6-9][0-9]{2}|^1[0-7][0-9]{2})([^0-9]|$)
>                                                        ^^^^^^^^^^ this
>
> -Mark?
>
>
> On Tue, 11 May 2004, Dave Margolis wrote:
>
>> yup, that did it.  easy enough.  my brain must not have been very
>> flexible
>> this morning because that seems like a very obvious variation of what i
>> already had.
>>
>> gracias!
>>
>> On Tue, 11 May 2004, Bill Kendrick wrote:
>>
>> > On Tue, May 11, 2004 at 11:32:35AM -0700, Dave Margolis wrote:
>> > > Anyway, I came up with the following:
>> > > (^[5-9][0-9]{2}|^[1][0-7][0-9]{2})
>> > >
>> > > This seems to be working for 500-1799, but apparently we're supposed
>> to
>> > > rule out 500 as well.
>> >
>> > Maybe do it for "50[1-9]", "5[1-9][0-9]", and then "6[0-9]{2}"... ?
>> >
>> > -bill!
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>
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