Class: Naturally::Segment

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/naturally/segment.rb

Overview

An entity which can be compared to other like elements for sorting. It’s an object representing a value which implements the Comparable interface which can convert itself to an array.

Instance Method Summary collapse

Constructor Details

#initialize(v) ⇒ Segment

Returns a new instance of Segment.



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# File 'lib/naturally/segment.rb', line 9

def initialize(v)
  @val = v
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/naturally/segment.rb', line 13

def <=>(other)
  to_array <=> other.to_array
end

#to_array ⇒ Array

Returns a representation of myself in array form which enables me to be compared against another instance for sorting. The array is prepended with a symbol so two arrays are always comparable.

Examples:

a simple number

Segment.new('10').to_array #=> [:int, 10]

a college course code

Segment.new('MATH101').to_array #=> [:str, "MATH", 101]

Section 633a of the U.S. Age Discrimination in Employment Act

Segment.new('633a').to_array #=> [:int, 633, "a"]

Returns:

  • (Array) —

    a representation of myself in array form which enables me to be compared against another instance for sorting. The array is prepended with a symbol so two arrays are always comparable.



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# File 'lib/naturally/segment.rb', line 31

def to_array
  # TODO: Refactor, probably via polymorphism
  if @val =~ /^(\p{Digit}+)(\p{Alpha}+)$/
    [:int, $1.to_i, $2]
  elsif @val =~ /^(\p{Alpha}+)(\p{Digit}+)$/
    [:str, $1, $2.to_i]
  elsif @val =~ /^\p{Digit}+$/
    [:int, @val.to_i]
  else
    [:str, @val]
  end
end