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class Hash
# Returns a hash with non +nil+ values.
#
# hash = { a: true, b: false, c: nil}
# hash.compact # => { a: true, b: false}
# hash # => { a: true, b: false, c: nil}
# { c: nil }.compact # => {}
def compact
self.select { |_, value| !value.nil? }
end
# Replaces current hash with non +nil+ values.
#
# hash = { a: true, b: false, c: nil}
# hash.compact! # => { a: true, b: false}
# hash # => { a: true, b: false}
def compact!
self.reject! { |_, value| value.nil? }
end
end
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