| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| /** |
| * Remove duplicate items from a list. |
| */ |
| export function removeDuplicates<T>(items: T[], hash?: (item: T) => unknown): T[] { |
| if (hash) { |
| const seen = new Set(); |
| return items.filter(x => { |
| const itemHash = hash(x); |
| if (seen.has(itemHash)) return false; |
| seen.add(itemHash); |
| return true; |
| }); |
| } |
| return [...new Set(items)]; |
| } |
| |
| export default removeDuplicates; |
