【問題】【2天】句子隨機生成器

問題一：建立幾個數組，隨機拔取數組中的變量，組合成句子，用+操作符銜接

在存儲隨機變量時，碰到了點貧苦，謝謝這篇文章的作者給了我思緒：關於Javascript中的隨機數要領。並做了點筆記：隨機數運用

全局變量在運用name時會出現問題，我改成了user。

var user = ["Zhangsan","Lisi","Wangwu","Zhaoliu"];
var age = [12,34,33,55];
var job = ["Teacher","Doctor","Police","Driver"];
function b(start,end){
return Math.floor(Math.random()*(end-start) +start);
}
var c = () => "I am " + user[b(0,user.length)] + ". I am " + age[b(0,age.length)] + " years old and I work as a " + job[b(0,job.length)] + "."

編輯器里，隨機數可直接賦值給變量，控制台里不可：

var a = [];
var b = return Math.floor(Math.random()*a.length);

問題二：用join要領銜接問題一中的句子。

var c = ["I am",user[b(0,user.length)],". I am",age[b(0,age.length)],"years old and I work as a",job[b(0,job.length)],"."].join(" ");

問題三：運用join要領把數組[3,2,1]轉換成字符串"3 is bigger than 2 is bigger than 1!"?

var a = [3,2,1];
var b = [a[0],'is bigger than',a[1],'is bigger than',a[2],'!'].join(" ");

做問題中發明：
用join()要領銜接句子比用+操作符更輕便，由於不需要斟酌字符串與字符串之間銜接符，放在括號中統一設置。