append-behavior.go

package main

import "fmt"

func main() {
	l1 := make([]string, 0, 0)
	fmt.Println(append(l1, "1"))
	fmt.Println(append(l1, "2"))
	fmt.Println(append(l1, "3"))
	fmt.Println(append(l1, "4"), append(l1, "5"), append(l1, "6"))
	fmt.Println(append(l1, "7"))
	// =>
	//  [1]
	//  [2]
	//  [3]
	//  [4] [5] [6]
	//  [7]

	l2 := make([]string, 0, 1)
	fmt.Println(append(l2, "1"))
	fmt.Println(append(l2, "2"))
	fmt.Println(append(l2, "3"))
	fmt.Println(append(l2, "4"), append(l2, "5"), append(l2, "6"))
	fmt.Println(append(l2, "7"))
	// =>
	//  [1]
	//  [2]
	//  [3]
	//  [6] [6] [6]   <---- !!!
	//  [7]
}