Can you explain me the following code? Mainly the <<... #RubyNewbie here
result << [] if result.length == level
It means that just before we begin to store the values of the next level, we add an empty array that will be used to store the values.
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Can you explain me the following code? Mainly the <<... #RubyNewbie here
It means that just before we begin to store the values of the next level, we add an empty array that will be used to store the values.