//console.log(uncamelize('helloWorld'));
console.log(uncamelize('helloWorld','-'));
//console.log(uncamelize('helloWorld','_'));
function uncamelize(str,char)
{
    var temp = str.split('');
    //console.log(temp);
    var ar = []
    for(var i =0 ; i<=temp.length ; i++)
    {
        
        if(temp[i] === 'W')
        {
           temp[i] = char;
        }
        
        ar.push(temp[i]);
    }
    return ar
}