展开开语法（Spread syntax）是属于 ES6 的一个新特性, 可以将数组表达式或者字符串在语法层面展开。用法：
myFunction(...iterableObj)接下来我们看看这个新特性到底有什么用
apply
下面的方法传入3个参数然后计算和
function sum (a,b,c) {
return a+b+c
}如果我们要传入的参数是一个数组呢？
var arr = [1,2,3]通常我们会用 apply() 来实现
sum.apply(null, arr)但是有了展开运算符我们实现起来就更简单了
sum(...arr)代码看起来是不是更简洁清晰了？
数组合并
合并数组的方法有很多，常用的是 concat()
var arr1 = [1,2]
var arr2 = [3,4]arr1 = arr1.concat(arr2)需要注意的是，concat是返回一个新的数组，并非修改原数组，所以还需要去接收返回值。
然而用 push （向数组的末尾添加一个或多个元素）结合展开运算符是能直接修改原数组的，非常酷炫
arr1.push(...arr2)或者追加到数组的开头
arr1.unshift(...arr2)有没有更变态的呢？把新数组添加到任意位置
var arr2 = [3, ...arr1, 4]非常灵活方便。
上面提到的
push()方法实际上是属于一类可接收任意数量参数的方法，而此类方法均可以使用展开运算符
比如 Math.min()
var nums = [4, 5, 3, 1]
Math.min(...nums)数组拷贝
var arr1 = [1,2]
var arr2 = [...arr1]注意，这里实际上只拷贝了一层，属于浅拷贝，数组中的对象仍然是拷贝的引用。
I loved as much as you will receive carried out right here. The sketch is attractive, your authored material stylish. nonetheless, you command get bought an nervousness over that you wish be delivering the following. unwell unquestionably come further formerly again as exactly the same nearly very often inside case you shield this hike. Vern Kolikas
Wonderful goods from you, man. I have understand your stuff previous to and you are just extremely excellent. I really like what you have acquired here, certainly like what you are saying and the way in which you say it. You make it entertaining and you still take care of to keep it sensible. I cant wait to read far more from you. This is actually a terrific site. Giovanni Koskinen
Very good point which I had quickly initiate efficient initiatives without wireless web services. Interactively underwhelm turnkey initiatives before high-payoff relationships. Holisticly restore superior interfaces before flexible technology. Completely scale extensible relationships through empowered web-readiness. Lino Mcfarland
Bottom line.. someone originally had to serve in the service and be a member. Member comes from that person and can be inherited. Think of it that way. I was the service member and now my daughter is a member. If she marries, her spouse can become a member then their children and so forth. I can leave usaa but my daughter is already a member so family line has already been established. Kristofer Mckendall
The next time I learn a weblog, I hope that it doesnt disappoint me as much as this one. I mean, I know it was my option to read, however I really thought youd have one thing fascinating to say. All I hear is a bunch of whining about something that you might fix if you werent too busy looking for attention. Adalberto Gnau