First class functions in Go

Question

I come from JavaScript which has first class function support. For example you can:
pass a function as a parameter to another function
return a function from a function.

Can someone give me an example of how I would do this in Go?

Aditya Agrawal · Accepted Answer

Go Language and Functional Programming might help. From this blog post: package main import "fmt" type Stringy func() string func foo() string { return "Stringy function" } func takesAFunction(foo Stringy) { fmt.Printf("takesAFunction: %v
", foo()) } func returnsAFunction() Stringy { return func() string { fmt.Printf("Inner stringy function
") return "bar" // have to return a string to be stringy } } func main() { takesAFunction(foo) var f Stringy = returnsAFunction() f() var baz Stringy = func() string { return "anonymous stringy
" } fmt.Printf(baz()) } https://play.golang.org/p/Vn-wid_IO2u

Go Language

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