How can a slice contain itself?

Question

I\'m trying to learn Golang using \"The Go Programming Language\" and I\'ve reached the section on slices. They make the comparison between arrays and slices in that two arr

Answer 1

The below example creates a slice that contains itself:

type Foo []Foo  
bar := make(Foo, 1)
bar[0] = bar

This can be done because the slice value internally contains a pointer to an array, a length, and a capacity.

An array on the other hand is a value. It can, at best, contain pointers to itself.