0e57ff7eee
This PR adds a generic set type to get rid of maps used as sets. Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package container
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type Set[T comparable] map[T]struct{}
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// SetOf creates a set and adds the specified elements to it.
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func SetOf[T comparable](values ...T) Set[T] {
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s := make(Set[T], len(values))
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s.AddMultiple(values...)
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return s
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}
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// Add adds the specified element to a set.
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// Returns true if the element is added; false if the element is already present.
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func (s Set[T]) Add(value T) bool {
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if _, has := s[value]; !has {
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s[value] = struct{}{}
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return true
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}
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return false
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}
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// AddMultiple adds the specified elements to a set.
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func (s Set[T]) AddMultiple(values ...T) {
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for _, value := range values {
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s.Add(value)
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}
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}
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// Contains determines whether a set contains the specified element.
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// Returns true if the set contains the specified element; otherwise, false.
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func (s Set[T]) Contains(value T) bool {
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_, has := s[value]
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return has
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}
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// Remove removes the specified element.
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// Returns true if the element is successfully found and removed; otherwise, false.
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func (s Set[T]) Remove(value T) bool {
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if _, has := s[value]; has {
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delete(s, value)
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return true
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}
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return false
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}
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// Values gets a list of all elements in the set.
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func (s Set[T]) Values() []T {
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keys := make([]T, 0, len(s))
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for k := range s {
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keys = append(keys, k)
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}
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return keys
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}
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