如何将字符串切片转换为符文切片

Question

how can I convert type []string to []rune?

I know you can do it like this:
[]rune(strings.Join(array,""))
but is there a better way?

Answer 1

I would prefer not to use strings.Join(array,"") for this purpose because it builds one big new string I don't need. Making a big string I don't need is not space-efficient, and depending on input and hardware it may not be time-efficient.

So instead I would iterate through the array of string values and convert each string to a rune slice, and use the built-in variadic append function to grow my slice of all rune values:

var allRunes []rune
for _, str := range array {
    allRunes = append(allRunes, []rune(str)...)
}