Class: Integer

Inherits:
Object show all
Defined in:
lib/flex_array/integer.rb

Overview

Extensions to Integer needed to support flex array.

Instance Method Summary collapse

Instance Method Details

#to_index_range(spec) ⇒ Object

Convert this integer to an range index against the spec.
Parameters

  • spec - The spec component used to validate this index.


Returns

  • A range.


Exceptions

  • IndexError if the range is not valid.



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# File 'lib/flex_array/integer.rb', line 23

def to_index_range(spec)
  alter_ego = (self >= 0) ? self : (spec.max + self + 1)

  if spec === alter_ego
    alter_ego..alter_ego
  else
    fail IndexError, "Subscript out of range: #{self.inspect}"
  end
end

#to_spec_component(stride) ⇒ Object

Convert this integer to a limits component.
Parameters

  • stride - the number of cells separating data with adjacent indexes.


Returns

  • A SpecComponent object of 0…self



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# File 'lib/flex_array/integer.rb', line 8

def to_spec_component(stride)
  if self >= 0
    SpecComponent.new(0...self, stride)
  else
    fail ArgumentError, "Invalid flex array dimension: #{self.inspect}"
  end
end