Iterate from input number to end of range (Ruby)

[liquidfunk]

I'm hoping to get my Ruby script to start at an inputted number, say 100, and itterate all the way up to the end of the range; 1000. Having all the numbers in between saved to a file.

This is a code I have so far:


#!/usr/bin/env ruby

if ARGV.length ==0;
puts "Enter the start number"
else puts ARGV.size
ARGV.each do |a|


for i in 0..1000 do
puts i;

end
end
end

To run it I'm typing:


ruby increment.rb 100 > increment.txt

However, it ignores the input number and starts at 1 regardless.

What am I doing wrong?

[schauerlich]

#!/usr/bin/env ruby

n = ARGV[0].to_i

for i in n..1000 do
puts i
end

[liquidfunk]

Thanks for your reply!

[ghostdog74]

this a more rubyish


n = ARGV[0].to_i
n.upto(1000) do|x|
puts x
end

[krazyd]

this a more rubyish


n = ARGV[0].to_i
n.upto(1000) do|x|
puts x
end


Or even:


(ARGV[0].to_i..1000).each { |x| puts x }


Ruby's flexibility is great! :D

[schauerlich]

Well why not:


#!/usr/bin/env ruby

puts ((ARGV[0].to_i || 0)..1000).to_a.join "\n"

[ghostdog74]

Well why not:


#!/usr/bin/env ruby

puts ((ARGV[0].to_i || 0)..1000).to_a.join "\n"

also


ruby -e 'puts (ARGV[0].to_i..1000).to_a' 0 > output

[schauerlich]

Nifty. I've only learned Ruby superficially, more of a Python guy myself. Naturally I assumed it should act like Python. :)