Question

Possible Duplicate:
Need to split arrays to sub arrays of specified size in Ruby

I’m looking to take an array—say [0,5,3,8,21,7,2] for example—and produce an array of arrays, split every so many places. If the above array were set to a, then

a.split_every(3)

would return [[0,5,3],[8,21,7][2]]

Does this exist, or do I have to implement it myself?

Answer 1

Use Enumerable#each_slice.

a.each_slice(3).to_a

Or, to iterate (and not bother with keeping the array):

a.each_slice(3) do |x,y,z|
  p [x,y,z]
end