Pack Method in Ruby

"pack" method is to show us binary format of object in Ruby Program.

Recently I want to create binary data from text file with Ruby.
Ruby has powerful regexp and convenient methods to be equip.

Therefore I try to create file and to store binary data.
But, I wonder how to store binary data!

Ruby provides the way to store for file is only text format.
I am in trouble.

I study a reference of Ruby.
It describes following.

Firstly You must use "pack" of Array Class method in order to know text of binary format of object

Secondly You store text of binary format in file.


Example code is next.

 file << [10].pack("i")