From: Robert Klemme <shortcutter@...>
Date: 2008-06-19T17:29:59+09:00
Subject: Re: parsing text into usablle numerical data

2008/6/18 Cthulhu __ <weedmasterp@gmail.com>:
> Sot he code as taken from Chris' post returns this error:
>
> read_data.rb:72:in `[]=': no implicit conversion from nil to integer
> (TypeError)
>        from read_data.rb:72
>        from read_data.rb:69:in `foreach'
>        from read_data.rb:69
>
> The code looks like this with line numbers...
>
>     69         File.foreach files_to_parse[i].to_s do |line|
>     70                 next if line.strip == ''
>     71                 idx, *dat = line.scan(/\d+/).map {|s| s.to_i}
>     72                 raw_data[idx] = dat
>     73         end
>     74         puts raw_data
>
> I suspect it may be a problem in the formatting of the data... perhaps
> there is some way to remove any non-integer characters eg. delimiting
> chars before parsing?

Your condition for next is pretty weak because it will let all lines
pass which contain some garbage.  Rather do this

data = []
File.foreach "data.txt" do |line|
 idx, *dat = line.scan(/\d+/).map {|s| s.to_i}
 data[idx] = dat if idx
end

or

# replace 42 with the number you need
data = []
File.foreach "data.txt" do |line|
 idx, *dat = line.scan(/\d+/).map {|s| s.to_i}
 data[idx] = dat if idx && dat.length == 42
end

or even

data = []
File.foreach "data.txt" do |line|
 (idx, *dat = line.scan(/\d+/).map {|s| s.to_i}).empty? or
   data[idx] = dat
end

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end