Read/Write File in Ruby

Simplest form of full Read / Write for a file in Ruby:

puts File.read(file_name)

File.write('/path/to/file', 'Some glorious content')

Line by Line Read

Why is “slurping” a file not a good practice? Slurping may be acceptable for configuration files, but slurping an input file makes the program practically useless for pipelines.

IO.foreach("testfile") {|x| print "GOT ", x }
File.foreach('testfile') {|x| print "GOT", x }

File::open('yozloy.txt','w') do |f|
  f << 'Some contains'
end