Sha256: 714550771c70289992fde35291174c49b7eda10d770d7c7b59cf0375615aebb3
Contents?: true
Size: 564 Bytes
Versions: 16
Compression:
Stored size: 564 Bytes
Contents
# encoding: utf-8
class Array
# Returns the _only_ element in the array or raise
# +IndexError+ if array hasn't exactly one element.
#
# @author Botanicus
# @from Extensions
# @since 0.0.3
# @raise [IndexError] If array hasn't exactly one element
# @return [Object] First (and only) item of the array
# @example
# [5].only # => 5
# [1, 2, 3].only # => IndexError
# [].only # => IndexError
def only
raise IndexError, "Array#only called on non-single-element array" unless self.size == 1
self.first
end
end
Version data entries
16 entries across 16 versions & 4 rubygems