element = [["BLUE", "CAT", "BEAR"], ["BALL", "CHAIR", "BOW"], ["CLOWN", "COLA", "PARROT", "LOVE"]]
There are obviously ten elements across the arrays. How do I find the count without flattening the array?
使用Ruby 2.4,
element.sum(&:size) #=> 10
ary = [["BLUE", "CAT", "BEAR"], ["BALL", "CHAIR", "BOW"], ["CLOWN", "COLA", "PARROT", "LOVE"]]
sum = ary.inject(0) { |tot, e| tot + e.size }
=> 10
ary.map(&:count).inject(:+)
#⇒ 10
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