CODEWITHSUNDEEP
ruby
BufBills
BufBills

Reputation: 8113

`end` with an or operator

I am reading a code piece like this:

def majority_agreed_commit
  current_commit = log_container.last_commit

  current_term_match_indices = match_indices.values.map do |match_index|
    match_index.downto(current_commit).find do |i|
      log_container.term(i) == current_term
    end || current_commit
  end

I don't understand the meaning of this: end || current_commit. Could anybody help me?

Upvotes: 0

Views: 29

Answers (1)

Aleksei Matiushkin
Aleksei Matiushkin

Reputation: 121000

Block

match_index.downto(current_commit).find do |i|
  log_container.term(i) == current_term
end

returns a value, this value is logically added against current_commit and the result is being yielded in topmost map: 

match_indices.values.map do |...|
  BLOCK_RESULT || current_commit
end

Upvotes: 4

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