File path in Ruby

hi, i have a line like this
“require File.expand_path(‘some_file_name’, File.dirname(FILE))”

i know this code is pointing to the file’s path. Please help me
understand clearly what is going inside the hood. The project uses
Ruby-2.1.1

The easiest way to go about this is to split the expression in parts,
execute them individually and output the result (e.g. via method p).

sorry that i sound too lame, but i am learning ruby. How do i execute.
is it via irb?

Niristotle Okram wrote in post #1168657:

sorry that i sound too lame, but i am learning ruby. How do i execute.
is it via irb?

You start the program “irb” and enter commands.

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