// Finding the number of vowels in a string.

// Bir string-dizideki sesli harflerin sayısını bulma.

​

var str = "Küçük-BÜYÜK sesli harflerden OLUŞAN bir STRİNG cümlesi"; 

var counter = 0;          

  str.split("").forEach(element => {      

    var sesliHarfler = ["A", "E", "I", "İ", "O", "Ö", "U", "Ü", "a", "e", "ı", "i", "o", "ö", "u", "ü"];

      var str_1 = (sesliHarfler.includes(element)); 

        if (str_1 == true) {

          counter++;

           console.log(counter);

   };                                           

});

const str = "The quick brown fox jumps over a lazy dog"; 

const vowels = str.match(/[aeiou]/gi); 

const consonants = str.match(/[^aeiou]/gi);   

vowels.concat([''],consonants).forEach(k => { console.log(k); } );

​

//Example of the solution to finding all the vowels within a string

​

function countAllTheVowels(string) { 

​

    //Finding all of the vowels

    const numberOfVowels = string.match(/[aeiou]/gi).length;

​

    //Returning the result

    return numberOfVowels;

}

function vowelsCount(str){

    let count = 0;

    let vowels = ["a","e","i","o","u"];

​

    for(let letter of str.toLowerCase()){

        for(let v of vowels){

            if(letter===v){

                count++;

            }

        }

    }

    return count;

}

const string = "Hello World. I am a developer";

console.log(vowelsCount(string)); // outcome: 10

// BEST and FASTER implementation using regex

const countVowels = (str) => (str.match(/[aeiou]/gi) || []).length

function getCount(str) {

  return (str.match(/[aeiou]/ig)||[]).length;

}

//This function accepts a string and 

//returns a new string that (matches all vowels) and displays these vowels as such

//Using built in method and RegEx

//Hope this helps:)

​

function is vowelsOnly(str) {

return  str.match(/[aeiou]/ig, '');

}

​

console.log(vowelsOnly("hello world"));//['e', 'o', 'o']

console.log(vowlesOnly("SHOUT it out"));//['O','U','i','o','u']

function countVowel(str) {

​

    // find the count of vowels

    const count = str.match(/[e]/gi).length;

​

    return count;

}

​

// take input

const y = prompt('Enter a name: ');

​

const result = countVowel(y);

​

console.log(result);

const countVowels = (input) => {

    let found = new Object()

    input.split("").forEach(char => {

        if (char.match(/[aeiou]/gi)) {

            const ch = char.toLowerCase()

            if (found.hasOwnProperty(ch)) {

                found[ch] = found[ch] + 1

            } else {

                found[ch] = 1

            }

        }

    })

    return found

}