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json: Generalize "keywordSuggestion" for general name suggestions

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keywordSuggestion is now a wrapper around nameSuggestion with a predefined
list of names.
This commit is contained in:
Martin Atkins 2017-05-20 09:45:15 -07:00
parent aa13eab21f
commit 17d372677d
1 changed files with 16 additions and 3 deletions
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19
zcl/json/didyoumean.go
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@ -10,10 +10,23 @@ var keywords = []string{"false", "true", "null"}
// given string and returns it if found. If no keyword is close enough, returns
// the empty string.
func keywordSuggestion(given string) string {
for _, kw := range keywords {
dist := levenshtein.Distance(given, kw, nil)
return nameSuggestion(given, keywords)
}
// nameSuggestion tries to find a name from the given slice of suggested names
// that is close to the given name and returns it if found. If no suggestion
// is close enough, returns the empty string.
//
// The suggestions are tried in order, so earlier suggestions take precedence
// if the given string is similar to two or more suggestions.
//
// This function is intended to be used with a relatively-small number of
// suggestions. It's not optimized for hundreds or thousands of them.
func nameSuggestion(given string, suggestions []string) string {
for _, suggestion := range suggestions {
dist := levenshtein.Distance(given, suggestion, nil)
if dist < 3 { // threshold determined experimentally
return kw
return suggestion
}
}
return ""