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* @license Apache-2.0
*
* Copyright (c) 2018 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.
*/
'use strict';
// MODULES //
var isObject = require( '@stdlib/assert/is-object' );
var objectKeys = require( '@stdlib/utils/keys' );
var defineProperty = require( '@stdlib/utils/define-property' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Defines (and/or modifies) properties.
*
* @param {Object} obj - object on which to define the properties
* @param {Object} props - object with property descriptors
* @throws {TypeError} first argument must be an object
* @throws {TypeError} second argument must be an object
* @returns {Object} object with added and/or modified properties
*
* @example
* var obj = {};
* defineProperties( obj, {
* 'foo': {
* 'value': 'bar'
* },
* 'baz': {
* 'value': 13
* }
* });
*
* var val = obj.foo;
* // returns 'bar'
*
* val = obj.baz;
* // returns 13
*/
function defineProperties( obj, props ) {
var keys;
var name;
var i;
if ( !isObject( obj ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an object. Value: `%s`.', obj ) );
}
if ( !isObject( props ) ) {
throw new TypeError( format( 'invalid argument. Second argument must be an object containing property descriptors. Value: `%s`.', props ) );
}
keys = objectKeys( props );
for ( i = 0; i < keys.length; i++ ) {
name = keys[ i ];
defineProperty( obj, name, props[ name ] );
}
return obj;
}
// EXPORTS //
module.exports = defineProperties;
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