Is there a difference between new() and “regular” allocation?

Question

In Go, is there a notable difference between the following two segments of code:

v := &Vector{}

as opposed to

v := new(         


        

Answer 1

Here is a difference: for a Person struct, the JSON string marshalled from &[]*Person{} is [] and from new([]*Person) is null using json.Marshal.

Check out the sample here: https://play.golang.org/p/xKkFLoMXX1s

• https://golang.org/doc/effective_go.html#allocation_new
• https://golang.org/doc/effective_go.html#composite_literals