Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/bootstripe/array_additions.rb

Instance Method Summary collapse

Instance Method Details

#compakt ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 15

def compakt
  self.reject do |i|
    i.nil? ||
    (i.respond_to?(:length) && i.length == 0) ||
    (i.respond_to?(:match) && i.match(/^\s+$/))
  end
end

#count(&action) ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 10

def count(&action)
  return size unless block_given?
  self.inject(0){ |memo,item| memo += 1 if action.call(item); memo }
end

#mean ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 6

def mean
  sum / size
end

#random(num_elements = 1) ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 23

def random(num_elements = 1)
  num_elements == 1 ? self[Kernel.rand(size)] : sort_by{ Kernel.rand }.slice(0...num_elements)
end

#random_by_frequency(seed = nil) ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 27

def random_by_frequency(seed = nil)
  self.select{|i| i.is_a?(Hash) }.inject({}) do |memo, item|
    memo[item] = item['frequency'] || item[:frequency] || 0
    memo
  end.random_by_frequency(seed)
end

#randomized ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 34

def randomized
  sort_by { rand }
end

#sections(min_size, max_size) ⇒ Object

Return subarrays of random length between a min and max



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# File 'lib/bootstripe/array_additions.rb', line 39

def sections(min_size, max_size)
  sects = []
  offset = 0
  while offset < size
    next_size = (min_size..max_size).random.to_i
    sects << self[offset..offset+next_size]
    offset += next_size + 1
  end

  sects
end

#sum ⇒ Object 



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# File 'lib/bootstripe/array_additions.rb', line 2

def sum
  self.inject(:+)
end