69 lines
1.7 KiB
JavaScript
69 lines
1.7 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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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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'use strict';
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// MODULES //
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var hasOwnProp = require( './../../has-own-property' );
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var isEnumerableProperty = require( './../../is-enumerable-property' );
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var isArray = require( './../../is-array' );
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var isInteger = require( '@stdlib/math/base/assert/is-integer' );
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var MAX_LENGTH = require( '@stdlib/constants/uint32/max' );
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// MAIN //
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/**
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* Tests whether a value is an `arguments` object.
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*
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* @private
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* @param {*} value - value to test
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* @returns {boolean} boolean indicating whether a value is an `arguments` object
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*
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* @example
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* function foo() {
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* return arguments;
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* }
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*
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* var bool = isArguments( foo() );
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* // returns true
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*
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* @example
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* var bool = isArguments( [] );
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* // returns false
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*/
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function isArguments( value ) {
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return (
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value !== null &&
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typeof value === 'object' &&
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!isArray( value ) &&
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typeof value.length === 'number' &&
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isInteger( value.length ) &&
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value.length >= 0 &&
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value.length <= MAX_LENGTH &&
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hasOwnProp( value, 'callee' ) &&
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!isEnumerableProperty( value, 'callee' )
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);
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}
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// EXPORTS //
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module.exports = isArguments;
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