Javascript Array Machine Coding Question #1, with Solution

Javascript interview machine coding question. Array-based machine coding JS interview question.

Write a JS code that takes an array of words in small letters and returns an array with the same word’s first letters in uppercase.

['sydney','melbourne','brisbane','newyork']

should return


[ 'Sydney', 'Melbourne', 'Brisbane', 'Newyork' ]

Solution

let arr = ['sydney','melbourne','brisbane','newyork']

arr = arr.map(a => {
    let letters = a.split('')
    letters[0] = letters[0].toUpperCase();
    return letters.join("");
})

console.log(arr)