Converting Odd and Even-indexed characters in a string to uppercase/lowercase in Javascript?

Question

I need to make a function that reads a string input and converts the odd indexed characters in the string to upperCase and the even ones to lowerCase.

function          


        

Answer 1

RegExp alternative that handles space between characters :

const alternativeCase = s => s.replace(/(\S\s*)(\S?)/g, (m, a, b) => a.toUpperCase() + b.toLowerCase());

console.log( alternativeCase('alternative Case') )