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# File 'lib/polyfill/v2_3/enumerable/instance/chunk_while.rb', line 9
def chunk_while
block = Proc.new
return [self] if size == 1
Enumerator.new do |yielder|
output = []
each_cons(2).with_index(1) do |(a, b), run|
if run == size - 1
if block.call(a, b)
output.push(a, b)
yielder << output
else
output.push(a)
yielder << output
yielder << [b]
end
else
output.push(a)
unless block.call(a, b)
yielder << output
output = []
end
end
end
end
end
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