From: 7stud -- <bbxx789_05ss@...>
Date: 2009-02-14T01:08:07+09:00
Subject: Re: help reading data from a file

Zoe Phoenix wrote:
>
> One problem I'm facing is how to read an array from a file. If I have a
> file with only an array in it, how do I apply a method such as
> ".generate" to the array? 
> 

arr = %w{Nashville Orlando Tampa Memphis}

File.open("data.txt", "w") do |f|
  Marshal.dump(arr, f)
end

cities = nil

File.open("data.txt") do |f|
  cities = Marshal.load(f)
end

p cities
p cities.length
p cities.reverse

--output:--
["Nashville", "Orlando", "Tampa", "Memphis"]
4
["Memphis", "Tampa", "Orlando", "Nashville"]


>
> cities = ['Nashville',
> 'Orlando',
> 'Tampa'
> 'Memphis'
> ]
>
>   cities.each do |city|
>     output = %Q(#{city})
>     dir = "/some/path/#{city.downcase.delete(' ')}.txt"
>     
>     File::open(dir, 'w') do |f|
>         f.write output
>     end
> end
> 
> I have a ruby program that I use to generate text files from a single
> array's data, but what I would like to do is be able to have it generate
> files from multiple arrays and save them in a different folder when it
> starts writing files from a different array.
> 

data = {
  'cities' => %w{Nasheville Olrando Tampa Memphis},
  'dogs' => %w{small medium large},
  'friends' => %w{Dave Cathy Jill}
}


dirs = {
  'cities' => './a', #Must be existing dirs
  'dogs' => './b',
  'friends' => './c'
}

data.each do |key, val|
  current_path = "#{dirs[key]}/#{key}"

  File.open(current_path, "w") do |f|
    val.each do |arr_element|
      f.write "#{arr_element} "
    end
  end

end


-- 
Posted via http://www.ruby-forum.com/.