这是一个哈希,记录我有多少水果
fruits = {"apples" => 10,"pears" => 15,"bananas" => 15,"grapes" => 12}
而且我想知道我最常吃的是哪种水果.
如果有断路器,那么就把它们全部归还.
解决方法
# easy
max_quantity = fruits.values.max
max_fruits = fruits.select { |k,v| v == max_quantity }.keys
# fast
max_quantity = -1.0/0.0
max_fruits = []
fruits.each do |k,v|
if v > max_quantity
max_quantity = v
max_fruits = []
end
max_fruits.push k if v == max_quantity
end
由于异常情况为Bad(tm),因此这两种情况总是返回一个数组.