证明纯文本列式布局合理性的最简洁方法？
在纯文本 .erb 模板中，您建议我使用什么方法来生成最可维护/可读的代码，如下所示：
ITEM DESCRIPTION QTY PRICE
Product Name One 1 $10.00
Another Product With a Longer Name 2 $5.00
Yet Another Item 1 $30.00
其中每一行（显然）都是可变的，基于已购买的商品。
我可以在辅助方法中计算所需的空白，但这是否已经通过更优雅的解决方案解决了？
In a plain-text .erb template, what method would you suggest I use to produce the most maintainable/readable code for something like this:
ITEM DESCRIPTION QTY PRICE
Product Name One 1 $10.00
Another Product With a Longer Name 2 $5.00
Yet Another Item 1 $30.00
Where each of those rows is (obviously) variable, based on the items that have been purchased.
I could calculate the needed whitespace in a helper method, but is this already a solved problem with a more elegant solution?
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看起来实际上可以将格式属性传递给 ERB 模板来执行此操作。我最近在朗姆酒的拉取请求中使用了这个技巧。
我的示例如下：
首先，erb 模板如下所示：
这输出的数据如下所示：
Looks like one can actually pass a format attribute to the ERB template to do this. I used this trick recently in a pull request for rumm.
My example follows:
Fist the erb template looks like the following:
This outputs data that looks like this:
听起来您需要一个纯文本表格生成器。我唯一能想到的 ruby 是这样的： https://github.com/visionmedia/terminal-table 但如果这个不能满足您的需求，可能还有其他的。
Sounds like you need a plain text table generator. The only one I can think of for ruby is this: https://github.com/visionmedia/terminal-table but there may be others if this one doesn't fit your needs.
我最终只使用
printf()和填充格式选项。对于这种情况，终端表看起来有点过于复杂，但对于更复杂的需求（例如显示表格结果集）很有用。I ended up just using
printf()with padding format options. The terminal table thing looked a bit over-complex for this situation, but useful for more complex requirements, such as displaying tabulated result sets.