javascript两个数组合并及判断数据类型的方法

  // javascript里将a,b两个数组合并的方法
    var a = [1,4,6,3,7,8,5,76,45];
    var b = ["fun","asw","wes","add","apple"];
    var c = a.concat( b );
  
    console.log("数组c    "+c);

数组c的内容是 ：  1,4,6,3,7,8,5,76,45,fun,asw,wes,add,apple

js里判断数据类型的方法：

1.   typeof:返回的是字符串类型

var a = "iamstring.";

var b = 222;

var c= [1,2,3];

var d = new Date();

var e = function(){alert(111);};

var f = function(){this.name="22";};alert(typeof a)  -------→ string