Sha256: 6755084caf6df0ab2ca63b9678cc09f118343c8e2eb16c1c46fe62e6bd853bda
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Size: 411 Bytes
Versions: 10
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Stored size: 411 Bytes
Contents
require 'facets/enumerable/group_by'
module Enumerable
# Similar to #group_by but returns an array of the groups.
# Returned elements are sorted by block.
#
# %w{this is a test}.cluster_by {|x| x[0]}
#
# _produces_
#
# [ ['a'], ['is'], ['this', 'test'] ]
#
# CREDIT: Erik Veenstra
def cluster_by(&b)
group_by(&b).sort.transpose.pop || [] # group_by(&b).values ?
end
end
Version data entries
10 entries across 10 versions & 1 rubygems