Class: Tuple

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

Overview

Array where elements can be shrunk but not removed

Instance Method Summary collapse

Constructor Details

#initialize(a) ⇒ Tuple

Returns a new instance of Tuple.



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# File 'lib/rantly/shrinks.rb', line 49

def initialize(a)
  @array = a
  @position = a.size - 1
end

Instance Method Details

#[](i) ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 54

def [](i)
  @array[i]
end

#[]=(i, value) ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 58

def []=(i, value)
  @array[i] = value
end

#array ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 82

def array
  return @array
end

#each(&block) ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 78

def each(&block)
  @array.each(&block)
end

#inspect ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 74

def inspect
  self.to_s
end

#length ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 62

def length
  @array.length
end

#retry? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rantly/shrinks.rb', line 102

def retry?
  @position >= 0
end

#shrink ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 86

def shrink
  shrunk = @array.dup
  while @position >= 0
    e = @array.at(@position)
    if e.respond_to?(:shrinkable?) && e.shrinkable?
      break
    end
    @position -= 1
  end
  if @position >= 0
    shrunk[@position] = e.shrink
    @position -= 1
  end
  return Tuple.new(shrunk)
end

#shrinkable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rantly/shrinks.rb', line 106

def shrinkable?
  @array.any? {|e| e.respond_to?(:shrinkable?) && e.shrinkable? }
end

#size ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 66

def size
  self.length
end

#to_s ⇒ Object 



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# File 'lib/rantly/shrinks.rb', line 70

def to_s
  @array.to_s.insert(1, "T ")
end