Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/rangeary.rb

Overview

Overwrites its equal operator

Direct Known Subclasses

Rangeary

Instance Method Summary collapse

Instance Method Details

#==(other) ⇒ Object

Updated Array#==

This modifies the original equality operator so that it returns true when both self and other are practically empty, that is, if #empty_element? and/or empty? are true for both, they are equal.

This modification is necessary because Rangeary#empty? never returns true; when it has no Range elements, it holds RangeExtd::NONE or equivalent, in whih case Rangeary#empty_element? returns true.

Parameters:

  • other (Object) 


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# File 'lib/rangeary.rb', line 1408

def ==(other)
  return true  if equals_before_rangeary other

  # It was false.  Is it?
  # eg., (Rangeary[RangeExtd::NONE] == []) is true,
  # because Rangeary[] with zero components does not exist!
  # Now either other or self is guranteed to be Rangeary.
  self_empt  = (respond_to?(:empty_element?) ? empty_element? : empty?)
  other_empt = (other.respond_to?(:empty_element?) ? other.empty_element? : other.empty?)
  self_empt && other_empt
end

#equals_before_rangeary ⇒ Object 



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# File 'lib/rangeary.rb', line 1395

alias_method :equals_before_rangeary, :==