// MergeSpace merge mutiple space to one, trim determin whether remove space at prefix and suffix
func MergeSpace(s string, trim bool) string {
space := false
idx, end := 0, len(s)
bs := make([]byte, end)
for i := 0; i < end; i++ {
if unibyte.IsSpace(s[i]) {
space = true
} else {
if space && (!trim || idx != 0) {
bs[idx] = ' '
idx++
}
bs[idx] = s[i]
idx++
space = false
}
}
if space && !trim {
bs[idx] = ' '
idx++
}
return string(bs[:idx])
}
// LastIndexNonSpace find index of last non-space character, if not exist, -1 was returned
func LastIndexNonSpace(s string) int {
for i := len(s) - 1; i >= 0; i-- {
if !unibyte.IsSpace(s[i]) {
return i
}
}
return -1
}
// IndexNonSpace find index of first non-space character, if not exist, -1 was returned
func IndexNonSpace(s string) int {
for i := range s {
if !unibyte.IsSpace(s[i]) {
return i
}
}
return -1
}
// RemoveSpace remove all space characters from string by unibyte.IsSpace
func RemoveSpace(s string) string {
idx, end := 0, len(s)
bs := make([]byte, end)
for i := 0; i < end; i++ {
if !unibyte.IsSpace(s[i]) {
bs[idx] = s[i]
idx++
}
}
return string(bs[:idx])
}