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Size: 488 Bytes
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Stored size: 488 Bytes
Contents
module Mutant
# Utility methods
module Util
# Error raised by `Util.one` if size is less than zero or greater than one
SizeError = Class.new(IndexError)
# Return only element in array if it contains exactly one member
#
# @param array [Array]
#
# @return [Object] first entry
def self.one(array)
return array.first if array.one?
fail SizeError, "expected size to be exactly 1 but size was #{array.size}"
end
end # Util
end # Mutant
Version data entries
6 entries across 6 versions & 1 rubygems