Algorithms - Recursion

capitalizeFirst.js

function capitalizeFirst (arr) {
    // Base case
    if (arr.length === 1) return arr[0][0].toUpperCase() + arr[0].slice(1);
    // Recursive case - return capitalize first elem of array concat with sliced arr
    return [arr[0][0].toUpperCase() + arr[0].slice(1)].concat(capitalizeFirst(arr.slice(1)))
}

// capitalizeFirst(['car','taco','banana']); // ['Car','Taco','Banana']