From: Gabriel Scherer <gabriel.scherer@gmail.com>
To: Robert Roessler <roessler@rftp.com>
Cc: Francois Berenger <berenger@riken.jp>, caml users <caml-list@inria.fr>
Subject: Re: [Caml-list] Scanf.sscanf surprised me
Date: Tue, 8 Oct 2013 06:30:00 +0200 [thread overview]
Message-ID: <CAPFanBG6ieJ7+37oV6ud-ZprNRqpsFoBCJRUvOL+i_9tRuCUPA@mail.gmail.com> (raw)
In-Reply-To: <52537BE9.6080005@rftp.com>
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Use "%s@,%f..." to specify (with @) that the string should stop at the
first comma.
On Tue, Oct 8, 2013 at 5:28 AM, Robert Roessler <roessler@rftp.com> wrote:
> Francois Berenger wrote:
>
>> This example line and scanning format work:
>>
>> # let line = "active_ZINC01535869
>> 0.470,0.389,0.479,0.453,0.470,**0.631,0.562,0.590,0.677,0.558,**0.379";;
>> val line : string =
>> "active_ZINC01535869
>> 0.470,0.389,0.479,0.453,0.470,**0.631,0.562,0.590,0.677,0.558,**0.379"
>> # Scanf.sscanf line "%s %f,%f,%f,%f,%f,%f,%f,%f,%f,%f,**%f" (fun name s1
>> s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 -> (name, s1, s2, s3, s4, s5, s6, s7,
>> s8, s9, s10, s11));;
>> - : string * float * float * float * float * float * float * float *
>> float * float * float * float
>> =
>> ("active_ZINC01535869", 0.47, 0.389, 0.479, 0.453, 0.47, 0.631, 0.562,
>> 0.59, 0.677, 0.558, 0.379)
>>
>> This one doesn't:
>>
>> # let line =
>> "active_ZINC01535869,0.470,0.**389,0.479,0.453,0.470,0.631,0.**
>> 562,0.590,0.677,0.558,0.379";;
>> val line :
>> string =
>>
>> "active_ZINC01535869,0.470,0.**389,0.479,0.453,0.470,0.631,0.**
>> 562,0.590,0.677,0.558,0.379"
>>
>> # Scanf.sscanf line "%s,%f,%f,%f,%f,%f,%f,%f,%f,%**f,%f,%f" (fun name s1
>> s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 -> (name, s1, s2, s3, s4, s5, s6, s7,
>> s8, s9, s10, s11));;
>> Exception: End_of_file.
>>
>> I am quite surprised.
>> I was expecting the first separator being a space or a coma
>> to behave the same.
>>
>
> The specification of scanf "%s" is "Any number of non-whitespace
> characters, stopping at the first whitespace character found".
>
> So, perhaps not that surprising?
>
> Regards,
> --
> Robert Roessler
>
>
>
> --
> Caml-list mailing list. Subscription management and archives:
> https://sympa.inria.fr/sympa/**arc/caml-list<https://sympa.inria.fr/sympa/arc/caml-list>
> Beginner's list: http://groups.yahoo.com/group/**ocaml_beginners<http://groups.yahoo.com/group/ocaml_beginners>
> Bug reports: http://caml.inria.fr/bin/caml-**bugs<http://caml.inria.fr/bin/caml-bugs>
>
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next prev parent reply other threads:[~2013-10-08 4:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 2:58 Francois Berenger
2013-10-08 3:28 ` Robert Roessler
2013-10-08 4:30 ` Gabriel Scherer [this message]
2013-10-08 15:23 ` Eric Cooper
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