Class: DS::ExpandableArray

Inherits:
Array
  • Object
show all
Defined in:
lib/ds/matrixes/expandable_array.rb

Overview

Class provides access to any element in array. If index i is greter than array size then elements from size to i are filled with extender.

Instance Method Summary collapse

Methods inherited from Array

#push_uniq, #sorted?

Constructor Details

#initialize(size = 0, extender = 0) ⇒ ExpandableArray

Returns a new instance of ExpandableArray.



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# File 'lib/ds/matrixes/expandable_array.rb', line 7

def initialize(size=0,extender=0)
  @extender = extender
  super(size,extender)
end

Instance Method Details

#[](x) ⇒ Object

Returns element at index. If index is greater than size of array then elements from size to index are filled with extender.



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# File 'lib/ds/matrixes/expandable_array.rb', line 14

def [](x)
  if x >=size
    for i in size..x
      self[i]=@extender
    end
  end
  super(x)
end

#[]=(x, v) ⇒ Object

Sets the element at index. If index is greater than size of array then elements from size to index are filled with extender.



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# File 'lib/ds/matrixes/expandable_array.rb', line 25

def []=(x,v)
  max = size
  super(x,v)
  if size - max >1
    (max..size-2).each do |i|
      self[i] = @extender
    end
  end
end