permute case

permutecase.go

package main

import (
	"fmt"
	"strings"
)

func main() {
	casePermute("ABCü123")
}

func casePermute(s string) {
	n := len(s)
	max := 1 << n;
	s = strings.ToLower(s)
	for i:=0;i<max; i++ {
		j:=0
		comb := strings.Map(func(r rune) rune {
			if (i>>j) & 1 == 1 {
				r = []rune(strings.ToUpper(string(r)))[0]
			}
			j++
			return r
		}, s)
		for j:=0 ; j < n; j++ {
			
		}
		fmt.Println(string(comb))
	}
}