如何将此Ruby字符串转换为数组? [英] How do I convert this Ruby String into an Array?

问题描述

将以下Ruby字符串转换为数组的最佳方法是什么(我使用的是ruby 1.9.2/Rails 3.0.11)

What is the best way to turn the following Ruby String into an Array (I'm using ruby 1.9.2/Rails 3.0.11)

Rails控制台:

>Item.first.ingredients
=> "[\"Bread, whole wheat, 100%, slice\", \"Egg Substitute\", \"new, Eggs, scrambled\"]"
>Item.first.ingredients.class.name
=> "String"
>Item.first.ingredients.length
77

所需的输出:

>Item.first.ingredients_a
["Bread, whole wheat, 100%, slice", "Egg Substitute", "new, Eggs, scrambled"]
>Item.first.ingredients_a.class.name
=> "Array
>Item.first.ingredients_a.length
=> 3

例如，如果我这样做:

>Array(Choice.first.ingredients)

我明白了:

=> ["[\"Bread, whole wheat, 100%, slice\", \"Egg Substitute\", \"new, Eggs, scrambled\", \"Oats, rolled, old fashioned\", \"Syrup, pancake\", \"Water, tap\", \"Oil, olive blend\", \"Spice, cinnamon, ground\", \"Seeds, sunflower, kernels, dried\", \"Flavor, vanilla extract\", \"Honey, strained/extracted\", \"Raisins, seedless\", \"Cranberries, dried, swtnd\", \"Spice, ginger, ground\", \"Flour, whole wheat\"]"] 

我肯定必须有一些明显的方法来解决这个问题.

I'm sure there must be some obvious way to solve this.

为清楚起见，可以在文本区域中以某种形式对其进行编辑，因此应使其尽可能安全.

For clarity, this will be editable in a textarea field in a form, so should be made as secure as possible.

推荐答案

class Item
  def ingredients_a
    ingredients.gsub(/(\[\"|\"\])/, '').split('", "')
  end
end

1. 去除多余的字符
2. 使用分隔模式将其拆分为数组元素

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