Module: DS::ArrayX

Defined in:
lib/ds/ext/ext.rb

Instance Method Summary collapse

Instance Method Details

#push_uniq(e) ⇒ Object

Pushes element e only if it is not already in the array. Returns index of elemnt e.



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# File 'lib/ds/ext/ext.rb', line 22

def push_uniq e
  if include? e
    index e
  else
    push e
    size-1
  end
end

#sorted?(order = :any) ⇒ Boolean

Checks if array is already sorted.

Returns:

  • (Boolean) 


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# File 'lib/ds/ext/ext.rb', line 5

def sorted?(order=:any)
  return true if size < 2

  case order
  when :asc
    (size-2).times{ |i| return false if self[i] > self[i+1] }
  when :desc
    (size-2).times{ |i| return false if self[i] < self[i+1] }
  else
    return (self[0] < self[1])? sorted?(:asc) : sorted?(:desc) 
  end

  true
end

#tail ⇒ Object

Tail



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# File 'lib/ds/ext/ext.rb', line 32

def tail
  self[1..-1]
end