Clojure：变换Varargs但保持他们Varargs

问题描述

我在Clojure工作了一个小宠物项目。我有一个函数，我传递varargs：

I am working on a little pet project in Clojure. I have a function that I pass varargs:

(defn foor [bar & args]
  (let new-args (custom-transform args)]
    (do-something new-args))))))

$ b b

但是， do-something 期望varargs，而不是列表对象。在 custom-transform

But, do-something is expecting varargs, not a list object. In custom-transform

(defn custom-transform [& args]
    (if vars vars nil))

如何保留vararg

How do I preserve the "vararg"-iness of my args after applying a transformation?

推荐答案

我认为apply应该做的诀窍：

I think apply should do the trick:

(apply do-something new-args)

$ b b

您的问题不是varargs特有的。你想做的是调用 do-something ，传递数组的元素作为函数的参数。这恰恰是应用的确切原因。

Your problem isn't specific to varargs. What you want to do is to call do-something, passing the elements of an array as the arguments to the function. This happens to be precisely what apply does.

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