From: deuteros <deuteros@xrs.net>
Subject: Re: Checking to see if a string is a letter
Date: Tue, 3 Apr 2012 12:56:59 +0000 (UTC)
Date: 2012-04-03T12:56:59+00:00 [thread overview]
Message-ID: <jles2r$fg6$2@dont-email.me> (raw)
In-Reply-To: m2k41xi5kv.fsf@pushface.org
On Tue 03 Apr 2012 04:26:40a, Simon Wright <simon@pushface.org> wrote in
news:m2k41xi5kv.fsf@pushface.org:
> deuteros <deuteros@xrs.net> writes:
>
>> On Tue 03 Apr 2012 01:15:27a, Jeffrey Carter
>> <spam.jrcarter.not@spam.not.acm.org> wrote in
>> news:jle13q$ale$1@tornado.tornevall.net:
>>
>>> What do you mean by "contains a single letter"?
>>
>> I mean the string contains a single letter and nothing more. For
>> example:
>>
>> a - Legal
>> A - Legal
>> aa - Illegal
>> a1 - Illegal
>
> Then for a start the length of the string needs to be 1.
>
> If it is, the first (and only!) character needs to be a lower- or
> upper-case letter. There are (at least) three ways of doing this:
>
> * declare an array of Boolean indexed by Character, with the elements
> indexed by letters set to True and the others to False, and index by
> the character to be tested;
>
> * declare two subtypes of character ("Character range 'a' .. 'z'", for
> instance) and check whether the character to be tested is 'in' either
> of the subtypes;
>
> * use the standard library, Ada.Characters.Handling.Is_Letter (probably
> the easiest for you!)
Thanks. I'll check out that library.
next prev parent reply other threads:[~2012-04-03 12:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-03 2:11 Checking to see is a string is a letter deuteros
2012-04-03 4:18 ` Leo Brewin
2012-04-03 4:52 ` Checking to see if " deuteros
2012-04-03 5:15 ` Jeffrey Carter
2012-04-03 6:07 ` deuteros
2012-04-03 6:47 ` Gautier write-only
2012-04-03 12:55 ` deuteros
2012-04-03 14:19 ` gautier_niouzes
2012-04-03 8:26 ` Simon Wright
2012-04-03 12:56 ` deuteros [this message]
2012-04-03 13:46 ` Dmitry A. Kazakov
2012-04-05 17:12 ` deuteros
2012-04-05 17:24 ` Martin Dowie
2012-04-05 18:04 ` deuteros
2012-04-05 18:18 ` Adam Beneschan
2012-04-05 18:56 ` Simon Wright
2012-04-03 20:40 ` Jeffrey Carter
2012-04-03 7:09 ` Checking to see is " Thomas Løcke
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