1.2.3.11.框架小叮嚀：重載函數

• 重載函數 (function overloading)

  • 讓相同函數有不同參數

  • JavaScript沒有

function greet(firstname, lastname, language){
    language = language || 'en';
    if (language === 'en') {
        console.log('Hello ' + firstname + " " + lastname)
    }
    if (language === 'es') {
        console.log('Hola ' + firstname + " " + lastname)
    }
}