39 lines
1020 B
Ruby
39 lines
1020 B
Ruby
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require 'active_support/secure_random'
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module KeePass
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module Random
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# If `n` is a positive integer, then returns a random
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# integer `r` such that 0 <= `r` < `n`.
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#
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# If `n` is 0 or unspecified, then returns a random
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# float `r` such that 0 <= `r` < 1.
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#
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# @param [Integer] n the upper bound
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# @return [Integer|Float] the random number
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# @see ActiveSupport::SecureRandom#random_number
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def self.random_number(n = 0)
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ActiveSupport::SecureRandom.random_number(n)
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end
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# Returns a randomly sampled item from the array.
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#
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# @param [Array] array the array to sample from
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# @return [Object] random item or nil if no items exist
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def self.sample_array(array)
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array[random_number(array.size)]
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end
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# Returns the array shuffled randomly.
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#
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# @param [Array] array the array to shuffle
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# @return [Array] the shuffled array
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def self.shuffle_array(array)
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array.sort_by { random_number }
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end
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end
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end
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