Method: Array#occurent

Defined in:
lib/core/facets/array/nonuniq.rb

#occurent(n = 2) ⇒ Object

Returns a list of elements that occur n times.

[0,1,1,1,3,0,1,2,4].occurent(3) #=> [1]

If n is a Range then returns elements that occur a number of time within the range.

[0,1,1,1,3,0,1,2,4].occurent(2..4) #=> [0,1]

Author:

  • Robert Dober



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# File 'lib/core/facets/array/nonuniq.rb', line 57

def occurent(n=2)
  h = Hash.new( 0 )
  each do |i|
    h[i] += 1
  end

  case n
  when nil
    h.delete_if{ |_,v| ! yield(v) }.keys
  when Range
    h.delete_if{ |_,v| ! n.include?(v) }.keys
  else
    h.delete_if{|_,v| v != n}.keys
  end
end