我如何传递多个参数红宝石方法作为一个数组？ [英] How do I pass multiple arguments to a ruby method as an array?

问题描述

我在这样的轨道帮助文件的方法

I have a method in a rails helper file like this

def table_for(collection, *args)
 options = args.extract_options!
 ...
end

和我希望能够调用这个方法类似这样

and I want to be able to call this method like this

args = [:name, :description, :start_date, :end_date]
table_for(@things, args)

，这样我可以动态地通过基于表单上的参数提交。我不能重写的方法，因为我在太多的地方使用它，我还能怎么办呢？

so that I can dynamically pass in the arguments based on a form commit. I can't rewrite the method, because I use it in too many places, how else can I do this?

推荐答案

红宝石处理多个参数很好。

Ruby handles multiple arguments well.

<一个href=\"http://www.misuse.org/science/2008/01/30/passing-multiple-arguments-in-ruby-is-your-friend/\">Here是一个 pretty很好的例子。

Here is a pretty good example.

def table_for(collection, *args)
  "Got #{collection} and #{args.join(', ')}"
end

table_for("one")                    » 	"Got one and "
table_for("one", "two")             » 	"Got one and two"
table_for "one", "two", "three"     » 	"Got one and two, three"
table_for("one", "two", "three")    » 	"Got one and two, three"
table_for("one", ["two", "three"])  » 	"Got one and two, three"

（输出剪切和粘贴IRB）

(Output cut and pasted from irb)

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