grokify/mogo

package transform

import (
    "errors"

    "github.com/grokify/mogo/type/maputil"
)

type TransformFunc func(s string) string

func TransformMap(xf func(string) string, s []string) (map[string]string, map[string][]string, error) {
    out := map[string]string{}
    for _, si := range s {
        out[si] = xf(si)
    }
    dupes := maputil.DuplicateValues(out)
    if !maputil.UniqueValues(out) {
        return out, dupes, errors.New("strcase collisions")
    }
    return out, dupes, nil
}