Module Random::Hash
In: lib/more/facets/random.rb

Methods

at_rand   at_rand!   pick   pick_key   pick_pair   rand_key   rand_key!   rand_pair   rand_pair!   rand_value   rand_value!   shuffle   shuffle!  

Public Instance methods

at_rand()

Alias for rand_value

at_rand!()

Alias for rand_value!

pick()

Alias for rand_value!

pick_key()

Alias for rand_key!

pick_pair()

Alias for rand_pair!

rand_key()

Returns a random key. 

  {:one => 1, :two => 2, :three => 3}.pick_key  #=> :three
rand_key!()

Delete a random key-value pair, returning the key. 

  a = {:one => 1, :two => 2, :three => 3}
  a.pick_key!  #=> :two
  a            #=> {:one => 1, :three => 3}
rand_pair()

Returns a random key-value pair. 

  {:one => 1, :two => 2, :three => 3}.pick  #=> [:one, 1]
rand_pair!()

Deletes a random key-value pair and returns that pair. 

  a = {:one => 1, :two => 2, :three => 3}
  a.rand_pair!  #=> [:two, 2]
  a             #=> {:one => 1, :three => 3}
rand_value()

Returns a random hash value. 

  {:one => 1, :two => 2, :three => 3}.rand_value  #=> 2
  {:one => 1, :two => 2, :three => 3}.rand_value  #=> 1
rand_value!()

Deletes a random key-value pair and returns the value. 

  a = {:one => 1, :two => 2, :three => 3}
  a.at_rand!  #=> 2
  a           #=> {:one => 1, :three => 3}
shuffle()

Returns a copy of the hash with values arranged in new random order. 

  h = {:a=>1, :b=>2, :c=>3}
  h.shuffle_hash  #=> {:b=>2, :c=>1, :a>3}
shuffle!()

Destructive shuffle_hash. Arrange the values in a new random order. 

  h = {:a => 1, :b => 2, :c => 3}
  h.shuffle_hash!
  h  #=> {:b=>2, :c=>1, :a=>3}

[Validate]