Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/hash.rb,
lib/rand.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.from_url_params(url_params) ⇒ Object

Zamienia parametry urla na hash ?menu=123&cos=12 => => 123, :cos => 12



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# File 'lib/hash.rb', line 12

def self.from_url_params(url_params)
  result = {}.with_indifferent_access
  url_params.split('&').each do |element|
    element = element.split('=')
    result[element[0]] = element[1]
  end
  result
end

Instance Method Details

#pick ⇒ Object

Choose and return a random key-value pair of self. => 1, :two => 2, :three => 3.pick #=> [:one, 1]



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# File 'lib/rand.rb', line 91

def pick
  k = keys.pick
  [k, self[k]]
end

#pick! ⇒ Object

Deletes a random key-value pair of self, returning that pair. a = => 1, :two => 2, :three => 3 a.pick #=> [:two, 2] a #=> => 1, :three => 3



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# File 'lib/rand.rb', line 100

def pick!
  rv = pick
  delete rv.first
  rv
end

#pick_key ⇒ Object

Return a random key of self. => 1, :two => 2, :three => 3.pick_key #=> :three



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# File 'lib/rand.rb', line 108

def pick_key
  keys.pick
end

#pick_key! ⇒ Object

Delete a random key-value pair of self and return the key. a = => 1, :two => 2, :three => 3 a.pick_key! #=> :two a #=> => 1, :three => 3



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# File 'lib/rand.rb', line 122

def pick_key!
  pick!.first
end

#pick_value ⇒ Object

Return a random value of self. => 1, :two => 2, :three => 3.pick_value #=> 3



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# File 'lib/rand.rb', line 114

def pick_value
  values.pick
end

#pick_value! ⇒ Object

Delete a random key-value pair of self and return the value. a = => 1, :two => 2, :three => 3 a.pick_value! #=> 2 a #=> => 1, :three => 3



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# File 'lib/rand.rb', line 130

def pick_value!
  pick!.last
end

#shuffle_hash ⇒ Object

Return a copy of self with values arranged in random order. => 1, :two => 2, :three => 3.shuffle_hash #=> :three=>1, :one=>3



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# File 'lib/rand.rb', line 145

def shuffle_hash
  shuffled = {}
  shuffle_hash_pairs.each{|k, v|
    shuffled[k] = v
  }
  shuffled
end

#shuffle_hash! ⇒ Object

Destructive shuffle_hash. Arrange the values of self in new, random order. h = => 1, :two => 2, :three => 3 h.shuffle_hash! h #=> :three=>1, :one=>3



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# File 'lib/rand.rb', line 158

def shuffle_hash!
  shuffle_hash_pairs.each{|k, v|
    self[k] = v
  }
  self
end

#shuffle_hash_pairs ⇒ Object

Return the key-value pairs of self with keys and values shuffled independedly. => 1, :two => 2, :three => 3.shuffle_hash_pairs #=> [[:one, 3], [:two, 1], [:three, 2]]



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# File 'lib/rand.rb', line 138

def shuffle_hash_pairs
  keys.shuffle.zip(values.shuffle)
end

#to_url_params ⇒ Object

Zamienia podany hash na zestaw parametrów do linka ?menu=123&cos=12



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# File 'lib/hash.rb', line 3

def to_url_params
  elements = []
  keys.size.times do |i|
    elements << "#{CGI::escape(keys[i])}=#{CGI::escape(values[i])}"
  end
  elements.join('&')
end