Are there ruby equivalents to car, cdr, and cons?

Question

Are there ruby equivalents to the lisp car, cdr, and cons functions? For those unfamiliar with lisp, here\'s what I want from ruby:

[1,2,3].car   => 1
[1,2,3]         


        

Answer 1

Ruby arrays are not implemented as singly-linked lists, so it is not as useful to have car and cdr and stuff.

If you really wanted, you could do

[1,2,3][0]      => 1
[1,2,3].first   => 1
[1,2,3][1..-1]  => [2,3]
[1] + [2,3]     => [1,2,3]