Golang camelcase / camelize

camelcase.go

package main

import (
	"fmt"
	"unicode"
)

func main() {
	for _, v := range []string{"target_prob1", "target_prob_1", "_target_prob_1", "target_prob_1_"} {
		fmt.Printf("%s => %s\n", v, ToCamel(v))
	}
}

// ToCamel camelcases the given string.
func ToCamel(in string) string {
	runes := []rune(in)
	var out []rune

	for i, r := range runes {
		if r == '_' {
			continue
		}
		if i == 0 || runes[i-1] == '_' {
			out = append(out, unicode.ToUpper(r))
			continue
		}
		out = append(out, r)
	}

	return string(out)
}