func EscapeSymbols(s, symbols string) string {
	m := make(map[rune]struct{})
	for _, c := range symbols {
		m[c] = struct{}{}
	}
	var buf bytes.Buffer
	var ok bool
	for _, c := range s {
		if _, ok = m[c]; ok {
			buf.WriteByte('\\')
		}
		buf.WriteRune(c)
	}
	return buf.String()
}
EscapeSymbols escape custom symbols
package stringutil
import (
	"bytes"
	"regexp"
	"unsafe"
	"github.com/shenwei356/util/byteutil"
)
func Split(slice string, letters string) []string {
	result := byteutil.Split([]byte(slice), []byte(letters))
	result2 := []string{}
	for _, s := range result {
		result2 = append(result2, string(s))
	}
	return result2
}
func Str2Bytes(s string) []byte {
	x := (*[2]uintptr)(unsafe.Pointer(&s))
	h := [3]uintptr{x[0], x[1], x[1]}
	return *(*[]byte)(unsafe.Pointer(&h))
}
func ReverseStringSlice(s []string) []string {
	l := len(s)
	t := make([]string, l)
	for i := 0; i < l; i++ {
		t[i] = s[i]
	}
	for i, j := 0, l-1; i < j; i, j = i+1, j-1 {
		t[i], t[j] = t[j], t[i]
	}
	return t
}
func ReverseStringSliceInplace(s []string) {
	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
		s[i], s[j] = s[j], s[i]
	}
}