Best way to read data?

ruby-talk
1

What’s the best Ruby idiom for reading data from a data file one line at a time
so that I could run the program with something like:
my_app.rb < data.txt

Thanks very much!

Christopher J. Meisenzahl CPS, CSTE
Senior Software Testing Consultant
Spherion
christopher.j.meisenzahl@citicorp.com

2

I have read that a good way is using ARGF.

ARGF.each do |line|
# do something
end

with the program run as you wrote it:

my_app.rb<data.txt

···

On Thursday, December 5, 2002, at 11:34 AM, christopher.j.meisenzahl@citicorp.com wrote:

What’s the best Ruby idiom for reading data from a data file one line
at a time
so that I could run the program with something like:
my_app.rb < data.txt

Thanks very much!

Christopher J. Meisenzahl CPS, CSTE
Senior Software Testing Consultant
Spherion
christopher.j.meisenzahl@citicorp.com

3

Hi,

What’s the best Ruby idiom for reading data from a data file one line at a time
so that I could run the program with something like:
my_app.rb < data.txt

A way to read lines from STDIN is:

while(line = gets)

do something with line

end

Or, to read lines from a particular file by name:

IO.foreach(“data.txt”) do |line|

do something with line

end

Hope this helps,

Bill

···

From: christopher.j.meisenzahl@citicorp.com