7kyu-indexed-capitalization.js

// Given a string and an array of integers representing indices, capitalize all letters at the given indices.

// For example:

//     capitalize("abcdef",[1,2,5]) = "aBCdeF"
//     capitalize("abcdef",[1,2,5,100]) = "aBCdeF". There is no index 100.

// The input will be a lowercase string with no spaces and an array of digits.

// Good luck!

// Be sure to also try:

// Alternate capitalization

// String array revisal

function capitalize(s, arr) {
        const newArr = s.split('');

        for (let i = 0; i < arr.length; i += 1) {
                if (arr[i] >= s.length) continue;
                newArr[arr[i]] = newArr[arr[i]].toUpperCase();
        }
        return newArr.join('');
}