在CoffeeScript中，如何将函数作为函数的参数传递，而函数又需要一个参数？

Question

I don't know how to phrase it properly so I can't find answers by Google, but here's basically my problem:

I want my CoffeeScript to output something like this in JS: (I'm developing a Node app)

var someapp = require('someapp')
var another = require('another')

someapp.configure(function() {
    someapp.use(another.do('argument'));
});

So I wrote it this way in CoffeeScript:

someapp = require 'someapp'
another = require 'another'

someapp.configure () ->
    someapp.use another.do 'argument'

But instead, I'm getting this output:

some.configure(function() {
    return someapp.use(another["do"]('argument'));
});

Obviously, my biggest problem is the line return someapp.use(another["do"]('argument')); I can't find in the CoffeeScript docs or elsewhere the proper syntax, so I'm hoping someone can point me to the right direction. Thanks in advance.

Answer 1

According to the docs ,

CoffeeScript provides the do keyword, which immediately invokes a passed function, forwarding any arguments.

So, coffeescript outputs another["do"] to avoid using the do reserved keyword.

Furthermore, in this case, the function another.do is an object property that happens to be a function. It can be accessed by using both another.do() and another["do"]() .