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@stdlib/assert

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Standard assertion utilities.

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/* * @license Apache-2.0 * * Copyright (c) 2021 The Stdlib 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. */ // TypeScript Version: 4.1 /// <reference types="@stdlib/types"/> /** * Tests whether a value is a property key. * * ## Notes * * - A property key is either a string, symbol, or a nonnegative integer. * * @param value - value to test * @returns boolean indicating whether value is a property key * * @example * var bool = isPropertyKey( 'beep' ); * // returns true * * @example * var bool = isPropertyKey( 37 ); * // returns true * * @example * var bool = isPropertyKey( {} ); * // returns false * * @example * var bool = isPropertyKey( [] ); * // returns false */ declare function isPropertyKey( value: any ): value is PropertyKey; // EXPORTS // export = isPropertyKey;