How do I access a specific element in a vector of vectors clojure

Question

If I have a vector defined as

(def matrix [[1 2 3][4 5 6]])

How in clojure do I access a random element in a vector of vectors? I keep seeing people say online that one of the benefits to using a vector over a list is that you get random access instead of having to recurse through a list but I haven't been able to find the function that allows me to do this. I'm used to in c++ where I could do matrix[1][1] and it would return the second element of the second vector.

Am I stuck having to loop one element at a time through my vector or is there an easier way to access specific elements?

Answer 1

Almost like you would do it in C++:

user=> (def matrix [[1 2 3][4 5 6]])
user=> (matrix 1)
[4 5 6]
user=> ((matrix 1) 1)
5

As the docs say:

Vectors implement IFn, for invoke() of one argument, which they presume is an index and look up in themselves as if by nth, i.e. vectors are functions of their indices.