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4e87b3d · Aug 28, 2017

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js-demo

js数据链 js内存 真假数组

var a = 100;

function func(){ console.log(a); var a=200; console.log(a); }

func();

var indexbox = { "index1": {"size": 1, "num": [0, 0]}, }; var cachesum = indexbox["index1"].num ; // cachesum.length= 6; console.log(cachesum); console.log(indexbox["index1"].length);

var indexbox = { "index1": {"size": 1, "num": [0, 0]}, }; var cachesum = indexbox["index1"].num ; // cachesum[1]= 6; console.log(cachesum); console.log(indexbox["index1"]);

js异步进程控制开辟一个新的空间监视两者的关系 可以是promis或者正常对象视具体情况而定 关键在于数据模型的建立是 a出发回来之前b是否出发 b未出发则照常, b已出发则 a将要执行的动作放入之前开辟的空间 等待b执行完的 抛回状态码+绑定的事件

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