29 lines
571 B
Go
29 lines
571 B
Go
package generate
|
|
|
|
import (
|
|
"unicode"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
func reverse(slice []string) {
|
|
for left, right := 0, len(slice)-1; left < right; left, right = left+1, right-1 {
|
|
slice[left], slice[right] = slice[right], slice[left]
|
|
}
|
|
}
|
|
|
|
func changeFirst(s string, f func(rune) rune) string {
|
|
c, n := utf8.DecodeRuneInString(s)
|
|
if c == utf8.RuneError { // empty or invalid
|
|
return s
|
|
}
|
|
return string(f(c)) + s[n:]
|
|
}
|
|
|
|
func lowerFirst(s string) string {
|
|
return changeFirst(s, unicode.ToLower)
|
|
}
|
|
|
|
func upperFirst(s string) string {
|
|
return changeFirst(s, unicode.ToUpper)
|
|
}
|