This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.
| Writing to a File | ||
|---|---|---|
| Code | Expected | Actual |
open('output', 'w') { |f| f << "This file contains great truths.\n" }
open('output', 'w') do |f|
f.puts 'The great truths have been overwritten with an advertisement.'
end
open('output') { |f| f.read } |
"The great truths have been overwritten with an advertisement.\n" | "The great truths have been overwritten with an advertisement.\n" |
open('output', "a") { |f| f.puts 'Buy Ruby(TM) brand soy sauce!' }
open('output') { |f| puts f.read } |
The great truths have been overwritten with an advertisement. Buy Ruby(TM) brand soy sauce! |
The great truths have been overwritten with an advertisement. Buy Ruby(TM) brand soy sauce! |
open('output', 'w') do |f|
[1,2,3].each { |i| f << i << ' and a ' }
end
open('output') { |f| f.read } |
"1 and a 2 and a 3 and a " | "1 and a 2 and a 3 and a " |
open('output', 'w') do |f|
f << 'This is going into the Ruby buffer.'
f.flush # Now it's going into the OS buffer.
end
IO.sync = false
open('output', 'w') { |f| f << 'This is going straight into the OS buffer.' } |
#<File:output (closed)> | |