65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package util
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import "net/url"
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// UniqueStrings returns a deduplicated version of the given
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// slice of strings, without changing the order of the entries.
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func UniqueStrings(strings []string) []string {
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var (
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l = len(strings)
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keys = make(map[string]any, l) // Use map to dedupe items.
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unique = make([]string, 0, l) // Return slice.
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)
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for _, str := range strings {
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// Check if already set as a key in the map;
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// if not, add to return slice + mark key as set.
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if _, set := keys[str]; !set {
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keys[str] = nil // Value doesn't matter.
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unique = append(unique, str)
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}
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}
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return unique
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}
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// UniqueURIs returns a deduplicated version of the given
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// slice of URIs, without changing the order of the entries.
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func UniqueURIs(uris []*url.URL) []*url.URL {
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var (
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l = len(uris)
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keys = make(map[string]any, l) // Use map to dedupe items.
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unique = make([]*url.URL, 0, l) // Return slice.
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)
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for _, uri := range uris {
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uriStr := uri.String()
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// Check if already set as a key in the map;
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// if not, add to return slice + mark key as set.
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if _, set := keys[uriStr]; !set {
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keys[uriStr] = nil // Value doesn't matter.
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unique = append(unique, uri)
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}
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}
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return unique
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}
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