I believe he is demostrating an optimization for strings that are already in the correct form.
On Monday, January 7, 2019 at 1:45:50 PM UTC-5, robert engels wrote: > > Huh? Isn’t your code calling the exact same method ? > > On Jan 7, 2019, at 12:22 PM, peterGo <[email protected] <javascript:>> > wrote: > > Nikolai, > > "What is the easiest way to make a string "LikeThis" --> "likeThis"?" > > Te easiest is not always the best. > > The code should be correct and reasonably efficient. For example, > > func firstToLower(s string) string { > if len(s) > 0 { > r, size := utf8.DecodeRuneInString(s) > if r != utf8.RuneError || size > 1 { > lo := unicode.ToLower(r) > if lo != r { > s = string(lo) + s[size:] > } > } > } > return s > } > > $ go test tolow_test.go -bench=. > BenchmarkToLow-4 30000000 41.3 ns/op 8 B/op 1 allocs/op > BenchmarkLow-4 200000000 6.96 ns/op 0 B/op 0 allocs/op > $ > > Playground: https://play.golang.org/p/z6CLIS7LaHo > > Peter > > On Saturday, November 24, 2012 at 5:51:23 AM UTC-5, Nikolai wrote: >> >> Hi! >> >> What is the easiest way to make a string "LikeThis" --> "likeThis"? >> > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
