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Copy pathcheckNumOfVowels.js
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33 lines (32 loc) · 1.3 KB
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/*
* Copyright 2020 Koddi Evangelista
*
* 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.
*/
//this function will return the number of vowels in your string
const checkNumOfVowels = (string) => {
//firts check if the input value is string
if(typeof string === 'string'){
// next create a regex(regular expression) that says only aeiou
// we also use global and ignore case flag
let regEx = /[aeiou]/gi;
// then we return the length of matched letter which is vowels using str.match(regex)
return string.match(regEx).length;
}
// if the input value is not a string return this
return 'not a string';
}
console.log(checkNumOfVowels('heEEEllo world'));
console.log(checkNumOfVowels('hello world'));
console.log(checkNumOfVowels(null));
console.log(checkNumOfVowels(100));