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Contents
module Enumerable
# Modulate. Divide an array into groups by modulo of the index.
#
# [2,4,6,8].modulate(2) #=> [[2,6],[4,8]]
#
# CREDIT: Trans
#
# NOTE: Would the better name for this be 'collate'?
def modulate(modulo)
return to_a if modulo == 1
raise ArgumentError, 'bad modulo' if size % modulo != 0
r = Array.new(modulo, [])
(0...size).each do |i|
r[i % modulo] += [self[i]]
end
r
end
end
Version data entries
10 entries across 10 versions & 1 rubygems