给定一组参数，如何将这些参数发送到 Ruby 中的特定函数? [英] Given an array of arguments, how do I send those arguments to a particular function in Ruby?

问题描述

原谅初学者的问题，但说我有一个数组:

Forgive the beginner question, but say I have an array:

a = [1,2,3]

还有一个函数；假设它是一个实例函数:

And a function somewhere; let's say it's an instance function:

class Ilike
  def turtles(*args)
    puts args.inspect
  end
end

如何使用 a 调用 Ilike.turtles，就像调用 (Ilike.new).turtles(1,2,3)代码>.

How do I invoke Ilike.turtles with a as if I were calling (Ilike.new).turtles(1,2,3).

我熟悉 send，但这似乎并没有将数组转换为参数列表.

I'm familiar with send, but this doesn't seem to translate an array into an argument list.

与我正在寻找的并行的是 Javascript apply，它等效于 call 但将数组转换为参数列表.

A parallel of what I'm looking for is the Javascript apply, which is equivalent to call but converts the array into an argument list.

推荐答案

如您所知，在定义方法时，可以使用 * 将参数列表转换为数组.同样，当您调用方法时，您可以使用 * 将数组转换为参数列表.所以在你的例子中你可以这样做:

As you know, when you define a method, you can use the * to turn a list of arguments into an array. Similarly when you call a method you can use the * to turn an array into a list of arguments. So in your example you can just do:

Ilike.new.turtles(*a)

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