ES6 forEach() 数组方法

var nums = new Array(12,13,14,15)  
console.log("Printing original array......")  

nums.forEach(function(val,index) {
   console.log(val)
})  
nums.reverse()  //reverses the array element
console.log("Printing Reversed array....")  

nums.forEach(function(val,index){
   console.log(val)
})