54 lines
1.0 KiB
Go
54 lines
1.0 KiB
Go
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package main
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const (
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ErrNotFound = DictionaryErr("could not find the word you were looking for")
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ErrWordExists = DictionaryErr("cannot add word because it already exists")
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ErrWordDoesNotExist = DictionaryErr("cannot update word because it does not exist")
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)
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type Dictionary map[string]string
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type DictionaryErr string
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func (e DictionaryErr) Error() string {
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return string(e)
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}
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func (d Dictionary) Search(word string) (string, error) {
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definition, ok := d[word]
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if !ok {
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return "", ErrNotFound
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}
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return definition, nil
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}
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func (d Dictionary) Add(word, definition string) error {
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_, err := d.Search(word)
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switch err {
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case ErrNotFound:
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d[word] = definition
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case nil:
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return ErrWordExists
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default:
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return err
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}
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return nil
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}
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func (d Dictionary) Update(word, definition string) error {
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_, err := d.Search(word)
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switch err {
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case ErrNotFound:
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return ErrWordDoesNotExist
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case nil:
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d[word] = definition
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default:
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return err
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}
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return nil
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}
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func (d Dictionary) Delete(word string) {
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delete(d, word)
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}
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