Ruby Way IO II

1 detect whether the file exists and its size

Filetest's exist? Method can detect whether a file exists:

Flag = filetest::exist? ("Lochnessmonster")
Flag = filetest::exists? ("UFO")
# exists? is a synonym for exist?

If we want to know if the file has content, we can use File::stat zero? Method:

Flag = file.new ("Somefile"). Stat.zero?

This will return true, because 0 is also true,nil false in Ruby.

So we can use size? Method:

If File.new ("MyFile"). Stat.size?
puts "The file has contents."
Else
puts "the file is empty."
End

Filetest module inside also have zero? and size? Method:

Flag1 = Filetest::zero? ("File1")
Flag2 = filetest::size? ("File2")

Here's another size method:

Size1 = File.size ("file1")
size2 = File.stat ("File2"). Size