Re: [Jprogramming] detect number but survive also string input
Doesn’t “unsubscribe” in the subject field do the trick for you? If you’re really sure you want to leave us... M Sent from my iPad > On 11 Sep 2022, at 16:28, lb_tay...@charter.net wrote: > > Hello.Could you please remove me from this distribution list for > now?Thank you.Sallie > >-From: "Raul Miller" > To: programm...@jsoftware.com > Cc: > Sent: Saturday September 10 2022 3:55:42PM > Subject: Re: [Jprogramming] detect number but survive also string > input > > I would use (0&". -: 1&".) or some variation which deals with the > cases you're interested in for this purpose. > > Thanks, > > -- > Raul > >> On Sat, Sep 10, 2022 at 2:49 PM Pawel Jakubas wrote: >> >> Dear J users, >> >> What is the way to detect number that could be represented as > integer, >> float, could be negative, could assume scientific notation or > rational. Is >> there something like isNumber or isString ? >> I would like to have something like this: >> >> if. (detect_number i) do. >> process number >> else. >> process string >> >> and detect_number to survive inputs >> i=: 2 >> i=: _2 >> i=: 2r3 >> i=: 2. >> i=: 4.29497e9 >> i=: 'Two' >> >> Thanks and cheers, >> Pawel >> > -- >> For information about J forums see > http://www.jsoftware.com/forums.htm > /> > -- > For information about J forums see > http://www.jsoftware.com/forums.htm > /> > -- > For information about J forums see http://www.jsoftware.com/forums.htm -- For information about J forums see http://www.jsoftware.com/forums.htm
Re: [Jprogramming] detect number but survive also string input
Hello.Could you please remove me from this distribution list for now?Thank you.Sallie -From: "Raul Miller" To: programm...@jsoftware.com Cc: Sent: Saturday September 10 2022 3:55:42PM Subject: Re: [Jprogramming] detect number but survive also string input I would use (0&". -: 1&".) or some variation which deals with the cases you're interested in for this purpose. Thanks, -- Raul On Sat, Sep 10, 2022 at 2:49 PM Pawel Jakubas wrote: > > Dear J users, > > What is the way to detect number that could be represented as integer, > float, could be negative, could assume scientific notation or rational. Is > there something like isNumber or isString ? > I would like to have something like this: > > if. (detect_number i) do. > process number > else. > process string > > and detect_number to survive inputs > i=: 2 > i=: _2 > i=: 2r3 > i=: 2. > i=: 4.29497e9 > i=: 'Two' > > Thanks and cheers, > Pawel > -- > For information about J forums see http://www.jsoftware.com/forums.htm /> -- For information about J forums see http://www.jsoftware.com/forums.htm /> -- For information about J forums see http://www.jsoftware.com/forums.htm
Re: [Jprogramming] detect number but survive also string input
test whether operations for numbers failed , but not particularly efficient try. 0+ i do number catch. do string end. On Sun, 11 Sep 2022 at 2:49 AM Pawel Jakubas wrote: > Dear J users, > > What is the way to detect number that could be represented as integer, > float, could be negative, could assume scientific notation or rational. Is > there something like isNumber or isString ? > I would like to have something like this: > > if. (detect_number i) do. > process number > else. > process string > > and detect_number to survive inputs > i=: 2 > i=: _2 > i=: 2r3 > i=: 2. > i=: 4.29497e9 > i=: 'Two' > > Thanks and cheers, > Pawel > -- > For information about J forums see http://www.jsoftware.com/forums.htm > -- For information about J forums see http://www.jsoftware.com/forums.htm
Re: [Jprogramming] detect number but survive also string input
I would use (0&". -: 1&".) or some variation which deals with the cases you're interested in for this purpose. Thanks, -- Raul On Sat, Sep 10, 2022 at 2:49 PM Pawel Jakubas wrote: > > Dear J users, > > What is the way to detect number that could be represented as integer, > float, could be negative, could assume scientific notation or rational. Is > there something like isNumber or isString ? > I would like to have something like this: > > if. (detect_number i) do. > process number > else. > process string > > and detect_number to survive inputs > i=: 2 > i=: _2 > i=: 2r3 > i=: 2. > i=: 4.29497e9 > i=: 'Two' > > Thanks and cheers, > Pawel > -- > For information about J forums see http://www.jsoftware.com/forums.htm -- For information about J forums see http://www.jsoftware.com/forums.htm
Re: [Jprogramming] detect number but survive also string input
maybeton =: 0&".^:('0'&-: +. 0 -.@-: 0&".) 0&".^:('0'&-: +. 0 -.@-: 0&".)
maybeton '3 22r4'
3 11r2
maybeton '3e2 22r4 two' NB. asking too much
300 5.5 0
maybeton 'two2'
two2
On Saturday, September 10, 2022 at 02:49:30 p.m. EDT, Pawel Jakubas
wrote:
Dear J users,
What is the way to detect number that could be represented as integer,
float, could be negative, could assume scientific notation or rational. Is
there something like isNumber or isString ?
I would like to have something like this:
if. (detect_number i) do.
process number
else.
process string
and detect_number to survive inputs
i=: 2
i=: _2
i=: 2r3
i=: 2.
i=: 4.29497e9
i=: 'Two'
Thanks and cheers,
Pawel
--
For information about J forums see http://www.jsoftware.com/forums.htm
--
For information about J forums see http://www.jsoftware.com/forums.htm
Re: [Jprogramming] detect number but survive also string input
Hi Pawel, datatype is a verb defined in the z locale that might do what you require datatype 's' literal datatype 0 boolean datatype 3 : 0 n=. 1 2 4 8 16 32 64 128 1024 2048 4096 8192 16384 32768 65536 131072 262144 t=. '/boolean/literal/integer/floating/complex/boxed/extended/rational' t=. t,'/sparse boolean/sparse literal/sparse integer/sparse floating' t=. t,'/sparse complex/sparse boxed/symbol/unicode/unicode4' (n i. 3!:0 y) pick <;._1 t ) or you could use the 3!:0 foreign conjunction that is at the core of the functionality and returns the powers of 2 identifiers. Cheers, bob > On Sep 10, 2022, at 11:49, Pawel Jakubas wrote: > > Dear J users, > > What is the way to detect number that could be represented as integer, > float, could be negative, could assume scientific notation or rational. Is > there something like isNumber or isString ? > I would like to have something like this: > > if. (detect_number i) do. >process number > else. >process string > > and detect_number to survive inputs > i=: 2 > i=: _2 > i=: 2r3 > i=: 2. > i=: 4.29497e9 > i=: 'Two' > > Thanks and cheers, > Pawel > -- > For information about J forums see http://www.jsoftware.com/forums.htm -- For information about J forums see http://www.jsoftware.com/forums.htm
[Jprogramming] detect number but survive also string input
Dear J users, What is the way to detect number that could be represented as integer, float, could be negative, could assume scientific notation or rational. Is there something like isNumber or isString ? I would like to have something like this: if. (detect_number i) do. process number else. process string and detect_number to survive inputs i=: 2 i=: _2 i=: 2r3 i=: 2. i=: 4.29497e9 i=: 'Two' Thanks and cheers, Pawel -- For information about J forums see http://www.jsoftware.com/forums.htm
