kata.js

// #1
// function createPhoneNumber(numbers) {
//     return `(${numbers.slice(0,3).join('')}) ${numbers.slice(3,6).join('')}-${numbers.slice(6,10).join('')}`
// }


// #2
// function createPhoneNumber(numbers){
//    return numbers.reduce((p,c) => p.replace('x',c), "(xxx) xxx-xxxx");
// }


//#3
function createPhoneNumber(numbers) {
    return numbers.join('').replace(/(\d{3})(\d{3})(\d{4})/, '($1) $2-$3');
}


console.log(createPhoneNumber([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]));
// "(123) 456-7890"

console.log(createPhoneNumber([1, 1, 1, 1, 1, 1, 1, 1, 1, 1]));
// "(111) 111-1111"

console.log(createPhoneNumber([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]));
  // "(123) 456-7890"