56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
/**
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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 isPositive = require( '@stdlib/assert/is-positive-number' ).isPrimitive;
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// MAIN //
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/**
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* Validates parameters.
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*
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* @private
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* @param {PositiveNumber} alpha - shape parameter
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* @param {PositiveNumber} beta - scale parameter
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* @returns {(Error|null)} error or null
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*
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* @example
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* var err = validate( 1.0, 2.0 );
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* if ( err ) {
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* throw err;
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* }
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*/
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function validate( alpha, beta ) {
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if ( !isPositive( alpha ) ) {
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return new TypeError( 'invalid argument. `alpha` must be a positive number. Value: `' + alpha + '`.' );
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}
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if ( !isPositive( beta ) ) {
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return new TypeError( 'invalid argument. `beta` must be a positive number. Value: `' + beta + '`.' );
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}
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return null;
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}
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// EXPORTS //
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module.exports = validate;
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