javascript - Is it difficult to understand the use of api in ramda?

Question

I’ve been looking at functional programming recently. The ramda library is used.

But the use of various APIs is confusing.

  var func3=_.compose(p,trace("f3:"), f);
  var func4=_.filter(_.compose(p,trace("f4:"), f));
  console.log(func3(3))//36
  console.log(func4([3]))//[3] why? what happened

Answer 1

Ramda will be automatically curried, is it understandable?

_.filter(func3, [3])

func3(3) returns 36, which is true, so filter it again and 3 is still there