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Курс във Факултета по Математика и Информатика към СУ

Решение на Първа задача от Мая Лекова

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Към профила на Мая Лекова

Резултати

  • 5 точки от тестове
  • 0 бонус точки
  • 5 точки общо
  • 15 успешни тест(а)
  • 2 неуспешни тест(а)

Код

class Array
def to_hash
ret_hash = {}
each { |pair| ret_hash.merge!(pair[0] => pair[1]) }
ret_hash
end
def index_by
ret_hash = {}
each { |x| ret_hash.merge!((yield x) => x) }
ret_hash
end
def subarray_count(arr)
cnt = 0
i = 0
each { |x| cnt += 1 if arr.eql?(self[i..(i + arr.length-1)]); i += 1 }
cnt
end
def occurences_count
ret_hash = {}
each { |x| ret_hash[x] = ret_hash.fetch(x, 0) + 1 }
ret_hash
end
end

Лог от изпълнението

..............F.F

Failures:

  1) Array#occurences_count returns a hash that defaults to 0 when the key is not present
     Failure/Error: [].occurences_count[:something].should eq 0
       
       expected 0
            got nil
       
       (compared using ==)
     # /tmp/d20111025-2903-163f3j4/spec.rb:74:in `block (2 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (3 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (2 levels) in <top (required)>'

  2) Array#occurences_count returns a hash, that does not change when indexed with a non-occuring element
     Failure/Error: hash['b'].should eq 0
       
       expected 0
            got nil
       
       (compared using ==)
     # /tmp/d20111025-2903-163f3j4/spec.rb:84:in `block (2 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (3 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.01532 seconds
17 examples, 2 failures

Failed examples:

rspec /tmp/d20111025-2903-163f3j4/spec.rb:73 # Array#occurences_count returns a hash that defaults to 0 when the key is not present
rspec /tmp/d20111025-2903-163f3j4/spec.rb:81 # Array#occurences_count returns a hash, that does not change when indexed with a non-occuring element

История (1 версия и 0 коментара)

Мая обнови решението на 23.10.2011 22:00 (преди около 13 години)

+class Array
+ def to_hash
+ ret_hash = {}
+ each { |pair| ret_hash.merge!(pair[0] => pair[1]) }
+ ret_hash
+ end
+
+ def index_by
+ ret_hash = {}
+ each { |x| ret_hash.merge!((yield x) => x) }
+ ret_hash
+ end
+
+ def subarray_count(arr)
+ cnt = 0
+ i = 0
+ each { |x| cnt += 1 if arr.eql?(self[i..(i + arr.length-1)]); i += 1 }
+ cnt
+ end
+
+ def occurences_count
+ ret_hash = {}
+ each { |x| ret_hash[x] = ret_hash.fetch(x, 0) + 1 }
+ ret_hash
+ end
+end