/
string.go
56 lines (50 loc) · 1.07 KB
/
string.go
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package helper
import (
"regexp"
"strings"
)
const (
DeprecationComment = "// Deprecated: Do not use."
)
var matchFirstCap = regexp.MustCompile("([A-Z])([A-Z][a-z])")
var matchAllCap = regexp.MustCompile("([a-z0-9])([A-Z])")
func ToSnakeCase(input string) string {
output := matchFirstCap.ReplaceAllString(input, "${1}_${2}")
output = matchAllCap.ReplaceAllString(output, "${1}_${2}")
output = strings.ReplaceAll(output, "-", "_")
return strings.ToLower(output)
}
func ToCamelCase(s string) string {
s = strings.TrimSpace(s)
if s == "" {
return s
}
n := strings.Builder{}
n.Grow(len(s))
capNext := true
for i, v := range []byte(s) {
vIsCap := v >= 'A' && v <= 'Z'
vIsLow := v >= 'a' && v <= 'z'
if capNext {
if vIsLow {
v += 'A'
v -= 'a'
}
} else if i == 0 {
if vIsCap {
v += 'a'
v -= 'A'
}
}
if vIsCap || vIsLow {
n.WriteByte(v)
capNext = false
} else if vIsNum := v >= '0' && v <= '9'; vIsNum {
n.WriteByte(v)
capNext = true
} else {
capNext = v == '_' || v == ' ' || v == '-' || v == '.'
}
}
return n.String()
}