Solution Review: Make a Stack with Variable Internal Types
This lesson discusses the solution to the challenge given in the previous lesson.
We'll cover the following...
package main
import (
"fmt"
"mystack"
)
var st1 mystack.Stack
func main() {
st1.Push("Brown")
st1.Push(3.14)
st1.Push(100)
st1.Push([]string{"Java", "C++", "Python", "C#", "Ruby"})
for {
item, err := st1.Pop()
if err != nil {
break
}
fmt.Println(item)
}
}In this program, we develop a generic stack type using a slice holding elements of type interface{ }. This is done in mystack.go in the folder mystack. The stack type is defined at line 4 as: type Stack []interface{}.
This type is an array of items of a generic type interface{}; that means the items can be of any type like ints, strings, booleans, arrays, etc. The following functions are implemented in the file mystack.go:
-
The
Len()method amounts tolenof thestackarray (see line 7 ...