leetcode-go/medium/71.go

package main

import (
	"fmt"
	"strings"
)

func simplifyPath(path string) string {
	strs := strings.Split(path, "/")
	res := []string{""}
	for _, v := range strs {
		// "/./" or "//" => ""
		if v == "." || v == "" {
		} else if v == ".." {
			// "/../" => "/"
			// "/d/c/../" => "/d"
			if len(res) != 1 {
				res = res[:len(res)-1]
			}
		} else {
			// "/c" => "/c"
			res = append(res, v)
		}
	}
	// "" => "/"
	if len(res) == 1 {
		return "/"
	}
	return strings.Join(res, "/")
}

func main() {
	fmt.Println(simplifyPath("/c/"))
	fmt.Println(simplifyPath("/a/./b/../../c/"))
	fmt.Println(simplifyPath("/../../"))
}