Step by Step solution about How to resolve the algorithm Reflection/Get source step by step in the Ruby programming language

The provided Ruby code uses the method source_location to determine the source file and line number of method definitions. Here's a detailed explanation:

1. Math.method(:sqrt).source_location: This line gets the method object for the sqrt method of the Math module and then calls source_location on it. source_location returns an array with two elements: the path to the source file where the method is defined and the line number of the definition. In this case, the result is ["/usr/local/lib/ruby2.3/2.3.0/mathn.rb", 119], indicating that the sqrt method is defined in the file mathn.rb at line 119.

2. Class.method(:nesting).source_location: This line gets the method object for the nesting method of the Class class and then calls source_location on it. However, in this case, source_location returns nil. This happens because Class#nesting is a native method, meaning it's implemented in C and not defined in Ruby source code.

The source_location method is useful for introspecting the source code of Ruby methods and classes. It can be helpful for understanding where methods and classes are defined and for debugging purposes.

require 'mathn'
Math.method(:sqrt).source_location
# ["/usr/local/lib/ruby2.3/2.3.0/mathn.rb", 119]

Class.method(:nesting).source_location
# nil, since Class#nesting is native