一 let 和 var 作用域 1 普通用法 for (var i = 0; i < 5; i++) { console.log(i); } console.log(i); //---结果是 5 ,因为var作用域不仅仅是当前模块. for (let i = 0; i < 5; i++) { console.log(i); } console.log(i); //---结果是i is not defined,因为let的作用只是当前模块. 结果都是: 0,1,2,3,4 ,因为是直…
org.apache.spark.deploy.yarn.Client.scala中的monitorApplication方法: /** * Report the state of an application until it has exited, either successfully or * due to some failure, then return a pair of the yarn application state (FINISHED, FAILED, * KILLED,…