On Fri, 28 Feb 2020 at 08:23, Amnon Baron Cohen <[email protected]> wrote:
> Here is a dumb version, that wastes loads of memory.
>
> func reverse(in string) string {
> out := strings.Builder{}
> out.Grow(len(in))
> runes:= make([]rune, 0, len(in))
>
>
> for _, r := range in {
> runes = append(runes, r)
> }
>
> You might be interested to know that this operation is built in to Go
itself, which means you can do something like this:
func Reverse(s string) string {
runes := []rune(s)
rev := make([]rune, 0, len(runes))
for i := len(runes) - 1; i >= 0; i-- {
rev = append(rev, runes[i])
}
return string(rev)
}
It's not even *that* much slower (about 60%). It doesn't always preserve
the original string length though.
On Saturday, 15 February 2020 16:37:15 UTC, Amarjeet Anand wrote:
>
> Hi
>
> I was wondering why isn't there built-in string reverse function. Is it
> left intentionally because of some reason?
>
> Although strings are immutable in go, there are multiple ways to achieve
> this pretty easily. But having this function inbuilt will save our time
> because we need it quite often.
>
>
> --
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