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havenwood/ruby_array_insert_every.rb

Forked from pmarreck/ruby_array_insert_every.rb
Last active December 14, 2015 14:59
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ruby_array_insert_every.rb
array = (1..12).map &:to_s
class Array
def insert_every n, this
each_slice(n).inject { |r, a| r << this << a }.flatten
end
end
array.insert_every 3, ','
#=> ["1", "2", "3", ",", "4", "5", "6", ",", "7", "8", "9", ",", "10", "11", "12"]
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