Can I convert a string of letters into an array?

Can I convert a string of letters into an array?

[Will]

Hey There,

How do I convert a string of letters into an array? I am not sure how to sort the letters in the form of a string but I know how to do it using an array.  Then how do I convert that array back to a string after I am done sorting it?  

Thanks a bunch,

Will

Re: Can I convert a string of letters into an array?

[Shark8]

On Monday, March 5, 2012 7:46:15 PM UTC-6, Will wrote:
> Hey There,
> 
> How do I convert a string of letters into an array? I am not sure how to sort the letters in the form of a string but I know how to do it using an array.  Then how do I convert that array back to a string after I am done sorting it?  
> 
> Thanks a bunch,
> 
> Will

You don't need to, an Ada String already is an array.
   Type String is array ( positive range <> ) of Standard.Character;

Re: Can I convert a string of letters into an array?

[Jeffrey Carter]

On 03/05/2012 06:46 PM, Will wrote:
>
> How do I convert a string of letters into an array? I am not sure how to sort
> the letters in the form of a string but I know how to do it using an array.
> Then how do I convert that array back to a string after I am done sorting
> it?

You could instantiate Ada.Containers.Generic_Array_Sort for the array type String.

-- 
Jeff Carter
"Sir Lancelot saves Sir Gallahad from almost certain temptation."
Monty Python & the Holy Grail
69

Re: Can I convert a string of letters into an array?

[Will]

On Monday, March 5, 2012 9:58:46 PM UTC-5, Jeffrey Carter wrote:
> On 03/05/2012 06:46 PM, Will wrote:
> >
> > How do I convert a string of letters into an array? I am not sure how to sort
> > the letters in the form of a string but I know how to do it using an array.
> > Then how do I convert that array back to a string after I am done sorting
> > it?
> 
> You could instantiate Ada.Containers.Generic_Array_Sort for the array type String.
> 
> -- 
> Jeff Carter
> "Sir Lancelot saves Sir Gallahad from almost certain temptation."
> Monty Python & the Holy Grail
> 69

Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?

Re: Can I convert a string of letters into an array?

[Will]

On Monday, March 5, 2012 8:46:15 PM UTC-5, Will wrote:
> Hey There,
> 
> How do I convert a string of letters into an array? I am not sure how to sort the letters in the form of a string but I know how to do it using an array.  Then how do I convert that array back to a string after I am done sorting it?  
> 
> Thanks a bunch,
> 
> Will

Here is the problem, "Write a procedure that takes in a string of 'B' and 'G' characters.  The procedure should rearrange the letters into an alternating 'B'-'G' pattern that continues until the less numerous letter runs out.  Assume the string only contains 'B's and 'G's; that the patter you create always starts with a 'B'; and that the string will always contain at least 1 of each letter.  For example: "BBBBGGGBG" becomes "BGBGBGBGB", and "GGBG" becomes "BGGG"."

Re: Can I convert a string of letters into an array?

[John B. Matthews]

In article 
<3994111.4442.1331003406394.JavaMail.geo-discussion-forums@vblb5>,
 Will <willmann817@gmail.com> wrote:

> On Monday, March 5, 2012 9:58:46 PM UTC-5, Jeffrey Carter wrote:
> > On 03/05/2012 06:46 PM, Will wrote:
> > >
> > > How do I convert a string of letters into an array? I am not sure 
> > > how to sort the letters in the form of a string but I know how to 
> > > do it using an array. Then how do I convert that array back to a 
> > > string after I am done sorting it?
> > 
> > You could instantiate Ada.Containers.Generic_Array_Sort for the 
> > array type String.
> 
> Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?

Jeff: In Ada, a String is an array of Character:

   type String is array(Positive range <>) of Character;

You can create an instance of Generic_Array_Sort that sorts the 
Characters in a String like this:

   procedure Sort is new Ada.Containers.Generic_Array_Sort(
      Index_Type   => Positive,
      Element_Type => Character,
      Array_Type   => String);

There's a complete example here:

<http://home.roadrunner.com/~jbmatthews/jumble.html>

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

Re: Can I convert a string of letters into an array?

[John B. Matthews]

In article <nospam-22AFE6.23512205032012@news.aioe.org>,
 "John B. Matthews" <nospam@nospam.invalid> wrote:

> In article 
> <3994111.4442.1331003406394.JavaMail.geo-discussion-forums@vblb5>,
>  Will <willmann817@gmail.com> wrote:
> 
> > On Monday, March 5, 2012 9:58:46 PM UTC-5, Jeffrey Carter wrote:
> > > On 03/05/2012 06:46 PM, Will wrote:
> > > >
> > > > How do I convert a string of letters into an array? I am not sure 
> > > > how to sort the letters in the form of a string but I know how to 
> > > > do it using an array. Then how do I convert that array back to a 
> > > > string after I am done sorting it?
> > > 
> > > You could instantiate Ada.Containers.Generic_Array_Sort for the 
> > > array type String.
> > 
> > Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?
> 
> Jeff: In Ada, a String is an array of Character:
> 
>    type String is array(Positive range <>) of Character;
> 
> You can create an instance of Generic_Array_Sort that sorts the 
> Characters in a String like this:
> 
>    procedure Sort is new Ada.Containers.Generic_Array_Sort(
>       Index_Type   => Positive,
>       Element_Type => Character,
>       Array_Type   => String);
> 
> There's a complete example here:
> 
> <http://home.roadrunner.com/~jbmatthews/jumble.html>

D'oh, I meant to address Will, of course.

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

Re: Can I convert a string of letters into an array?

[Jeffrey Carter]

On 03/05/2012 08:10 PM, Will wrote:
>
> Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?

That's OK. It's apparent from your post with the problem statement that you 
don't want to sort a String anyway.

-- 
Jeff Carter
"Sir Lancelot saves Sir Gallahad from almost certain temptation."
Monty Python & the Holy Grail
69

Re: Can I convert a string of letters into an array?

[anon]

Yes, it possible!

with Ada.Text_IO ;
procedure a is

  A : String ( 1 .. 4 ) ;

  B : Character := 'T' ;
begin
  A := ( 't', 'e', 's', 't' ) ;
  Ada.Text_IO.Put_Line ( A ) ;

  A := ( B, 'e', 's', 't' ) ;
  Ada.Text_IO.Put_Line ( A ) ;
  
end a ;

In <jj4b0f$fj5$1@tornado.tornevall.net>, Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org> writes:
>On 03/05/2012 08:10 PM, Will wrote:
>>
>> Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?
>
>That's OK. It's apparent from your post with the problem statement that you 
>don't want to sort a String anyway.
>
>-- 
>Jeff Carter
>"Sir Lancelot saves Sir Gallahad from almost certain temptation."
>Monty Python & the Holy Grail
>69

Re: Can I convert a string of letters into an array?

[Ludovic Brenta]

Will wrote on comp.lang.ada:
> Here is the problem, "Write a procedure that takes in a string of 'B'
> and 'G' characters.  The procedure should rearrange the letters into
> an alternating 'B'-'G' pattern that continues until the less numerous
> letter runs out.  Assume the string only contains 'B's and 'G's; that
> the patter you create always starts with a 'B'; and that the string
> will always contain at least 1 of each letter.  For example:
> "BBBBGGGBG" becomes "BGBGBGBGB", and "GGBG" becomes "BGGG"."

As others have said, a string is, by definition, an array of Characters,
so you don't need to "convert a string of letters into an array".  Your
teacher should have already explained to you how to access individual
elements (Characters) in an array (String), so this homework assignment
should be no challenge to you.  To get you started, here is a skeleton
where you "just" need to fill in the blanks:

function Rearrange (Input : in String) is
   Result : String (Input'Range);
   Number_Of_Bs : Natural;
   Number_Of_Gs : Natural;
begin
   ...
   return Result;
end Rearrange;

I hope I didn't say too much...

-- 
Ludovic Brenta.

Re: Can I convert a string of letters into an array?

[Jacob Sparre Andersen]

Dennis Lee Bieber wrote:

> 	That's all? Given the specifications you don't even need to
> "rearrange" the contents. All you need is the total length, and a pass
> over the string to count how many "B"s appear in it. That gives you
> the information of how many "G"s are in it (since the spec says you
> don't have to worry about any other characters). Given m-B, n-G, a
> moderately simple loop can be used to emit alternating BG pairs until
> the shorter one has expired, then just emit enough of the remaining
> letter to fill out the required length.

Why not just use Ada.Strings.Fixed.Count and Ada.Strings.Fixed."*".

Jacob
-- 
"Those who will not reason, are bigots,
 those who cannot, are fools, and
 those who dare not, are slaves."

Re: Can I convert a string of letters into an array?

[tonyg]

On Mar 6, 3:10 am, Will <willmann...@gmail.com> wrote:
> On Monday, March 5, 2012 9:58:46 PM UTC-5, Jeffrey Carter wrote:
> > On 03/05/2012 06:46 PM, Will wrote:
>
> > > How do I convert a string of letters into an array? I am not sure how to sort
> > > the letters in the form of a string but I know how to do it using an array.
> > > Then how do I convert that array back to a string after I am done sorting
> > > it?
>
> > You could instantiate Ada.Containers.Generic_Array_Sort for the array type String.
>
> > --
> > Jeff Carter
> > "Sir Lancelot saves Sir Gallahad from almost certain temptation."
> > Monty Python & the Holy Grail
> > 69
>
> Jeff, I am a beginner at Ada, so I have no idea what you mean by that ha ha?

I've been using Ada since 1987 (not all the time) and I'm still
finding useful stuff I didn't know about it. I'm also still ask stuff
in here pretty regularly :)

Re: Can I convert a string of letters into an array?

[Simon Wright]

tonyg <tonythegair@gmail.com> writes:

> On Mar 6, 3:10 am, Will <willmann...@gmail.com> wrote:

>> Jeff, I am a beginner at Ada, so I have no idea what you mean by that
>> ha ha?
>
> I've been using Ada since 1987 (not all the time) and I'm still
> finding useful stuff I didn't know about it. I'm also still ask stuff
> in here pretty regularly :)

Me too. Google is your friend; enter Ada.Containers.Generic_Array_Sort &
look at the second hit.

Re: Can I convert a string of letters into an array?

[mockturtle]

On Thursday, March 8, 2012 12:30:06 PM UTC+1, Simon Wright wrote:
> tonyg writes:
> 
> > On Mar 6, 3:10 am, Will <willmann...@gmail.com> wrote:
> 
> >> Jeff, I am a beginner at Ada, so I have no idea what you mean by that
> >> ha ha?
> >
> > I've been using Ada since 1987 (not all the time) and I'm still
> > finding useful stuff I didn't know about it. I'm also still ask stuff
> > in here pretty regularly :)
> 
> Me too. Google is your friend; enter Ada.Containers.Generic_Array_Sort &
> look at the second hit.

Why bothering with Google? Just check paragraph A.18.16 of our beloved RM ;-). 

Re: Can I convert a string of letters into an array?

[Simon Wright]

mockturtle <framefritti@gmail.com> writes:

> On Thursday, March 8, 2012 12:30:06 PM UTC+1, Simon Wright wrote:
>> tonyg writes:
>> 
>> > On Mar 6, 3:10 am, Will <willmann...@gmail.com> wrote:
>> 
>> >> Jeff, I am a beginner at Ada, so I have no idea what you mean by
>> >> that ha ha?
>> >
>> > I've been using Ada since 1987 (not all the time) and I'm still
>> > finding useful stuff I didn't know about it. I'm also still ask
>> > stuff in here pretty regularly :)
>> 
>> Me too. Google is your friend; enter
>> Ada.Containers.Generic_Array_Sort & look at the second hit.
>
> Why bothering with Google? Just check paragraph A.18.16 of our beloved
> RM ;-).

True, but that Google route takes you to a working example.