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数组的遍历你都会用了，那Promise版本的呢
source link: https://juejin.im/post/5ae0aee451882567244daaee
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这里指的遍历方法包括：map、reduce、reduceRight、forEach、filter、some、every 因为最近要进行了一些数据汇总，node版本已经是8.11.1了，所以直接写了个async/await的脚本。 但是在对数组进行一些遍历操作时
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