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          window 10 使用npm install出现的问题1、找不到python.exe“D:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\....\node_modules\node-gyp\bin\node-gyp.js” rebu
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          可以说CompletableFuture是对Future的升级。那么CompletableFuture解决了Future的那些痛点问题？

多个Future之间的依赖关系
Future没有通知机制，使用阻塞或者轮训的方式等待结果。因此只能阻塞的等待结果后进行下一步操作

FutureFuture接口
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参考http://baijiahao.baidu.com/s?id=1598230482548525561&amp;wfr=spider&amp;for=pc


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          分区原理
挂载挂载是系统的逻辑概念，表示把虚拟的一个盘符与物理的硬盘建立联系的过程


window在window系统中，将物理硬盘挂载到：C,D等盘符
linuxlinux系统中，将物理硬盘挂载到响应的目录上


挂载点挂载点就是操作系统个虚拟出来的盘符概念


window在window系统中就
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          个人总结，如有纰漏敬请支持指教。谢谢！
storage和memory表示变量的持久化方式storage修饰的变量将被保存到区块中memory修饰的变量将在内存中。当外部函数对某合约完成调用时memory变量会被清除。
合约中的状态变量默认为strong。
storage你可以认为storage是一个
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          前段时间了解了一下智能合约的开发，部署运行。本文中介一下前段时间的成果。如果存在某些纰漏还行各位大神指正批评
智能合约开发在智能合约的开发中，我选择的是Ethereum的solidity。当然还有其他的开发语言如：
语言入门对于solidity语言的入门可以参照一下一些教程

solidity的官方
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          我们知道springboot类似于一个spring的脚手架，其提供的自动化配置，内嵌tomcat，能够很方便的创建微服务的接口服务。但是，有时候我们如果需要基于springboot开发一个web应用程序，如何配置呢？
pom引入&lt;parent&gt;    &lt;groupId&gt;org
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          泛化 （Generalization）类图
关系
表示一种继承关系。子类继承父类所有的特性与方法。当然子类可以覆盖父类中的方法。
箭头指向被继承的父类，实线

实现 （Implements）类图
关系
表示类与接口的关系。实现类实现接口中约定的规范。
箭头指向接口，并且是虚线

代码体现组合（Com
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