time-to-botec/squiggle/node_modules/@stdlib/utils/capitalize-keys/lib/capitalize_keys.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

69 lines
1.5 KiB
JavaScript

/**
* @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 hasOwnProp = require( '@stdlib/assert/has-own-property' );
// MAIN //
/**
* Converts the first letter of each object key to uppercase.
*
* @param {Object} obj - source object
* @throws {TypeError} must provide an object
* @returns {Object} new object
*
* @example
* var obj1 = {
* 'aa': 1,
* 'bb': 2
* };
*
* var obj2 = capitalizeKeys( obj1 );
* // returns { 'Aa': 1, 'Bb': 2 }
*/
function capitalizeKeys( obj ) {
var out;
var key;
var k;
if ( typeof obj !== 'object' || obj === null ) {
throw new TypeError( 'invalid argument. Must provide an object. Value: `'+obj+'`.' );
}
out = {};
for ( key in obj ) {
if ( hasOwnProp( obj, key ) ) {
if ( key === '' ) {
out[ key ] = obj[ key ];
} else {
k = key.charAt( 0 ).toUpperCase() + key.slice( 1 );
out[ k ] = obj[ key ];
}
}
}
return out;
}
// EXPORTS //
module.exports = capitalizeKeys;