block_find.rb

def block_find(&block)
  each do |i|
    result = yield i
    return result if result
  end
end 

>> %w(foo bar baz).block_find { |s| s.match(/(o)/) }
=> #<MatchData "o" 1:"o">

def block_find(&block)
  each do |i|
    return yield(i) || next
  end
end