将字符串数组的数组转换为字符串的散列并在Ruby中浮动？

Question

我有以下数组数组.

>> gold_prices

=> [["2011-01-11", "134.91"], ["2011-01-10", "134.12"], 
   ["2011-01-07", "133.58"], ["2011-01-06", "133.83"]]

将每个子数组转换为hash:string => float的最简洁方法是什么？

Answer 1

>> gold_prices = Hash[gold_prices.map {|date, price| [date, price.to_f]}]

=> {"2011-01-11" => 134.91, "2011-01-10" => 134.12,
    "2011-01-07" => 133.58, "2011-01-06" => 133.83}