如何使用Ramda函数在索引处接受参数？

Question

Note

Firstly, I would like to post this to the code review site; but you need at least 3 lines of code for that, and this question doesn't necessitate that much code. I'm aware this question is a little vague for SO, but I can't see a preferable site on which to post it.

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The actual question

I have found it useful in a couple of situations, particularly when using ramda, to be able to have a function which simply returns argument n which was passed to the function.

The easiest way I've been able to produce that is:

const takeArgument = argIndex => (...args) => args[argIndex];

This is fine, and works for what I need, but my question is, is there a way to do this using only Ramda functions? I've not been able to find any examples of this being done, but I feel like there must be a simple way to do something like this.

Answer 1

As @Thomas mentioned in his comment, this is easily achieved with nthArg , for instance:

 const { nthArg } = R; const getSecondArg = nthArg(1) const x = getSecondArg(1, 2) console.dir(x) 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.min.js"></script>