func IndexOf(in interface{}, elem interface{}) int {
  inValue := reflect.ValueOf(in)

  elemValue := reflect.ValueOf(elem)

  inType := inValue.Type()

  if inType.Kind() == reflect.String {
    return strings.Index(inValue.String(), elemValue.String())
  }
......

  go func(data string) {
      part1 <- myFunc(data)
  }(data)

func a() {
  go b(data)
}

func b(data string) {
  part1 <- myFunc(data)
}

  go func(data string) {
      part1 <- myFunc(data)
  }(data)