"use strict";
/**
 * Copyright 2018, OpenCensus Authors
 *
 * 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.
 */
Object.defineProperty(exports, "__esModule", { value: true });
const COMMA_SEPARATOR = ',';
const UNSET_LABEL_VALUE = {
    value: null
};
/**
 * Returns a string(comma separated) from the list of label values.
 *
 * @param  {LabelValue[]} labelValues The list of the label values.
 * @returns {string} The hashed label values string.
 */
function hashLabelValues(labelValues) {
    return labelValues.map(lv => lv.value).sort().join(COMMA_SEPARATOR);
}
exports.hashLabelValues = hashLabelValues;
/**
 * Returns default label values.
 *
 * @param  {number} count The number of label values.
 * @returns {LabelValue[]} The list of the label values.
 */
function initializeDefaultLabels(count) {
    return new Array(count).fill(UNSET_LABEL_VALUE);
}
exports.initializeDefaultLabels = initializeDefaultLabels;
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