From: "David A. Black" <dblack@...>
Date: 2005-10-14T00:10:07+09:00
Subject: Re: Iterate over md Array (the Ruby way)

Hi --

On Thu, 13 Oct 2005, Peter v. N. wrote:

> Yes, I admit that I was not very clear
> (English's not my mother tongue.. ;-) ):
>
> An input text file (@source) looks like this:
>
> 0000022340
> 0023457000
> 0000000110
> 0008000000
> 0000090000
> 0000330000
> 0000000730
> 0664000000
> 0034000000
>
> or maybe:
>
> AGCTAGCT12345
> AAA3BBBCC
> AAACC
>
> @source[i][j] = ASCII substring at this position:
> e.g.: val = @source[1][3] #-> "3"
>
> by non-convertible I mean everything that cannot be
> represented as an integer ("12345678A", "A".to_i # -> "0")
>
> Array a) yields in	Array a)
>
> Array a) yields in	0000000012345
> 			0000000000000
> 			0000000000000
>
> I managed to obtain such structures, but not by the Ruby way...

See if this helps:

array = <<EOM.split(/\n/)
0000022340
0023457000
0000000110
AGCTAGCT12345
AAA3BBBCC
AAACC
EOM

max = array.map {|st| st.chomp.size }.max
array.each {|s| s.replace(s.rjust(max,"0")).gsub!(/\D/,"0") }
puts array


David

>
> David A. Black wrote:
>> Hi --
>> 
>> On Thu, 13 Oct 2005, Peter v. N. wrote:
>> 
>>> Hi all,
>>> 
>>> Once again I disturb you for a, maybe, obvious thing
>>> I can't figure out.
>>> 
>>> I have successfully created an md array (see older posts
>>> from me) thanks to the support found here.
>>> 
>>> Now I would like to list all String items in the source array
>>> (a Text file containing numbers) and convert and place them into the 
>>> destination array as int objs. I know about the String#split method but 
>>> this recreates an array that does not match the dimensions I want
>>> (e.g. lines with different length).
>>> 
>>> My approach is very c-ish:
>>> 
>>> <code>
>>> # @source is a String array. If the string contains a non-convertible
>>> # substring, 0 is placed in destination array. @array is the destination # 
>>> md array created with the appropriate dimensions according to @source # 
>>> (longest line as vindex (-) and index as hindex (|) )
>>> 
>>> for i in 0...@hindex.length
>>>     for j in 0...@vindex[i].length
>>>         @array[i][j] = @source[i][j].to_i.char.to_i
>>>     end
>>> end
>>> </code>
>>> 
>>> Is there a Ruby way to replace <code> with blocks?
>> 
>> 
>> I'm not quite sure what's what here.  I thought @vindex was the length
>> of the longest string, but then what's @vindex[i]?
>> 
>> Also, what would constitute a non-convertible substring?
>> 
>> Can you clarify, or maybe provide a small example of desired
>> input/output?
>> 
>> 
>> David
>> 
>

-- 
David A. Black
dblack@wobblini.net