JavaScript ucWords and CamelCase plus spread operator Array Concat example

spread-op+camelcase+ucwords.js

var toCamelCase = function(str) {
    return str
        .replace(/\s(.)/g, function($1) { return $1.toUpperCase(); })
        .replace(/\s/g, '')
        .replace(/^(.)/, function($1) { return $1.toLowerCase(); });
}

var ucWords = function(str) {
 return str.toLowerCase().replace(/\b[a-z]/g, function(letter) {
    return letter.toUpperCase(); 
 }) 
}
var names=["joffrey joffer","Lone starr", "darth vader"];
[... names.map(item => ucWords(item)), ...names.map(item => toCamelCase(item))]

It will output

["Joffrey Joffer", "Lone Starr", "Darth Vader", "joffreyJoffer", "loneStarr", "darthVader"]