Re: Eye Reasoner Builtin/N3 question/challenge

I'm using regex101 to craft expressions as well.
The need I have is to *extract the number from a string regardless of what
is in it.*
so the string could be "13.4 kV" or "Come, mister 13.4 tally man" or "tally
me banana 13.4"

How do we handle escape sequences if they are required then???
unless there's a regexp that does the same without \?


On Mon, Oct 3, 2022 at 1:44 PM William Van Woensel <
william.vanwoensel@gmail.com> wrote:

> Hi Tim
>
> Note that the regex doesn’t match the “kV” at the end of your string.
> Also, the regex must contain at least one group (don’t think the negative
> lookahead counts). This one works on regex101.com:
>
> ^(?!.*\..*\.)([.\d]+) kV$
>
> The escaped version does not work with eye but it does with jen3:
>
> (?!.*\\..*\\.)([.\\d]+) kV
>
> So, it must be a difference between prolog and java ..
>
>
> W
>
> On Oct 3, 2022, at 1:19 PM, tim duval <tim.duval11@gmail.com> wrote:
>
> any reason why this is not working????
>
> @prefix string: <http://www.w3.org/2000/10/swap/string#> .
> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
> @prefix : <http://example.org/> .
>
> { ("13.4 kV" "^(?!.*\\..*\\.)[.\\d]+$") string:scrape ?s . }
> => { :test :has ?s } .
>
> On Mon, Oct 3, 2022 at 12:57 PM tim duval <tim.duval11@gmail.com> wrote:
>
>> will do!! thanks!!!!
>>
>>
>> On Mon, Oct 3, 2022 at 12:55 PM Shaw, Ryan <ryanshaw@unc.edu> wrote:
>>
>>>
>>>
>>> > On Oct 3, 2022, at 12:43 PM, tim duval <tim.duval11@gmail.com> wrote:
>>> >
>>> > Regarding regular expressions:
>>> > I find that string:matches() returns a boolean whether or not the
>>> string matches the regular expression,
>>> > I am looking to extract the number from the string based on the
>>> regular expression.
>>>
>>> Check out string:scrape
>>> https://w3c.github.io/N3/spec/string.html#vocab_string_scrape
>>
>>
>