58 lines
2.0 KiB
JavaScript
58 lines
2.0 KiB
JavaScript
"use strict";
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/*
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* Copyright 2024 Google LLC.
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.distinctValues = distinctValues;
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exports.deterministicJSONStringify = deterministicJSONStringify;
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/**
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* Returns an array of distinct values. Order is not guaranteed.
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* @param values - The values to filter. Should be JSON-serializable.
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* @return - An array of distinct values.
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*/
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function distinctValues(values) {
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const map = new Map();
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for (const value of values) {
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map.set(deterministicJSONStringify(value), value);
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}
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return Array.from(map.values());
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}
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/**
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* Returns a stringified version of the object with keys sorted. This is required to
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* ensure that the stringified version of an object is deterministic independent of the
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* order of keys.
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* @param obj
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* @return {string}
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*/
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function deterministicJSONStringify(obj) {
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return JSON.stringify(normalizeObject(obj));
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}
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function normalizeObject(obj) {
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if (obj === undefined ||
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obj === null ||
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Array.isArray(obj) ||
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typeof obj !== 'object') {
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return obj;
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}
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// Copy the original object key and values to a new object in sorted order.
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const newObj = {};
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for (const key of Object.keys(obj).sort()) {
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const value = obj[key];
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newObj[key] = normalizeObject(value); // Recursively sort nested objects
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}
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return newObj;
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}
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//# sourceMappingURL=DistinctValues.js.map
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