Go make example

package main
type Foo map[string]string
type Bar struct {
         s string
         i int
}
func main() {
         // OK:
         y := new(Bar)
         (*y).s = "hello"
         (*y).i = 1

         // NOT OK:
         z := make(Bar) // compile error: cannot make type Bar
         z.s = "hello"
         z.i = 1

         // OK:
         x := make(Foo)
         x["x"] = "goodbye"
         x["y"] = "world"

         // NOT OK:
         u := new(Foo)
         (*u)["x"] = "goodbye" // !!panic!!: runtime error: 
                   // assignment to entry in nil map
         (*u)["y"] = "world"
}

Source: stackoverflow.com

Go make example

func main() {
    // OK:
    ch := make(chan string)
    go sendData(ch)
    go getData(ch)
    time.Sleep(1e9)

    // NOT OK:
    ch := new(chan string)
    go sendData(ch) // cannot use ch (variable of type *chan string) 
                   // as chan string value in argument to sendData
    go getData(ch)
    time.Sleep(1e9)
}

func sendData(ch chan string) {
    ch <- "Washington"
    ch <- "Tripoli"
    ch <- "London"
    ch <- "Beijing"
    ch <- "Tokio"
}

func getData(ch chan string) {
    var input string
    for {
        input = <-ch
        fmt.Printf("%s ", input)

    }
}

Source: stackoverflow.com

Go make example

var p *[]int = new([]int)
or
p := new([]int)

Source: stackoverflow.com

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