Sha256: f1fd997eca55b637c8ab5c4a303c3b5fc1bf13f20924f6de6436ab917d30d183
Contents?: true
Size: 442 Bytes
Versions: 7
Compression:
Stored size: 442 Bytes
Contents
class Array
# Returns the _only_ element in the array. Raises an IndexError if
# the array's size is not 1.
#
# [5].only # => 5
#
# expect IndexError do
# [1,2,3].only
# end
#
# expect IndexError do
# [].only
# end
#
# CREDIT: Gavin Sinclair, Noah Gibbs
def only
unless size == 1
raise IndexError, "Array#only called on non-single-element array"
end
first
end
end
Version data entries
7 entries across 6 versions & 1 rubygems