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multidict.go
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multidict.go
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// Copyright 2022 Tomas Machalek <tomas.machalek@gmail.com>
// Copyright 2022 Institute of the Czech National Corpus,
// Faculty of Arts, Charles University
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collections
import "errors"
var ErrorStopIteration = errors.New("stopped iteration")
type Multidict[T any] struct {
data map[string][]T
}
func (md *Multidict[T]) Add(k string, v T) {
_, ok := md.data[k]
if !ok {
md.data[k] = make([]T, 0, 10)
}
md.data[k] = append(md.data[k], v)
}
func (md *Multidict[T]) Get(k string) []T {
return md.data[k]
}
func (md *Multidict[T]) ForEach(applyFn func(k string, v []T) error) error {
for k, v := range md.data {
err := applyFn(k, v)
if err != nil {
return err
}
}
return nil
}
func NewMultidict[T any]() *Multidict[T] {
return &Multidict[T]{
data: make(map[string][]T),
}
}