How to redirect output of Ruby programme to some file

Question

I have the following code:

puts "amit"
puts "ravi"

It outputs:

amit
ravi

I would like to redirect amit to one file and ravi to a different file.

Suppose my file name is name.rb. When I am trying like

system("name.rb > #{@filename}")

both amit and ravi are redirected to @filename but I want redirection to a different file or first it will redirect to two files of same name but in one file output is amit and in other file of same output is ravi.

Answer 1

Have a look at Ruby Input/Output and Ruby File Handling.

Answer 2

Instead of redirecting you can pass filenames as arguments and write from ruby to the files:

open(ARGV[0], 'w') do |f|
  f.puts "amit"
end

open(ARGV[1], 'w') do |f|
  f.puts "ravi"
end

Then:

system("name.rb 1.txt 2.txt")

Answer 3

You can change the destination of $stdout and $stderr:

stout = File.open(ARGV[0], 'w')
sterr = File.open(ARGV[1], 'w')

$stdout.reopen(stout)
$stderr.reopen(sterr)

puts "something"
$stderr.puts "something another"