Class: Aliasing::History

Inherits:
Object
  • Object
show all
Defined in:
lib/aliasing/history.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(entries) ⇒ History

Returns a new instance of History.



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# File 'lib/aliasing/history.rb', line 6

def initialize(entries)
  @entries = entries
  @by_frequency = {}
  sort_by_frequency
end

Instance Attribute Details

#by_frequency ⇒ Object

Returns the value of attribute by_frequency.



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# File 'lib/aliasing/history.rb', line 4

def by_frequency
  @by_frequency
end

#entries ⇒ Object

Returns the value of attribute entries.



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# File 'lib/aliasing/history.rb', line 4

def entries
  @entries
end

Instance Method Details

#most_frequent(num) ⇒ Object 



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# File 'lib/aliasing/history.rb', line 23

def most_frequent(num)
  Hash[@by_frequency[0..num-1]]
end

#sort_by_frequency ⇒ Object 



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# File 'lib/aliasing/history.rb', line 12

def sort_by_frequency
  entries_with_freqency = {}
  
  @entries.each { |e| 
    entries_with_freqency[e] ||= 0
    entries_with_freqency[e] += 1
  }

  @by_frequency = entries_with_freqency.sort_by{|k,v| v}.reverse
end