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Contents
module MoreCoreExtensions
module ArrayElementCounts
# Returns a Hash of each element to the count of those elements. Optionally
# pass a block to count by a different criteria.
#
# [1, 2, 3, 1, 3, 1].counts # => {1 => 3, 2 => 1, 3 => 2}
# %w(a aa aaa a aaa a).counts { |i| i.length } # => {1 => 3, 2 => 1, 3 => 2}
#
def element_counts
each_with_object(Hash.new(0)) do |i, h|
key = block_given? ? yield(i) : i
h[key] += 1
end
end
end
end
Array.send(:include, MoreCoreExtensions::ArrayElementCounts)
Version data entries
19 entries across 19 versions & 1 rubygems