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<h1 class="post-title"><a class="post-link" href="/post/2023-06-26-modify-logging-level-of-java.util.logging/">java 内置日志如何调整日志级别</a></h1>
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<span class="post-time"> 2023-06-26 </span>
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最简单的修改日志级别的办法 Java 内置日志 java.util.logging的设计初衷是在大型项目环境下，每个包及类的层级各有各自的 Logger，
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<h1 class="post-title"><a class="post-link" href="/post/2020-07-28-escape-characters-in-json/">JSON 如何存储换行符</a></h1>
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<span class="post-time"> 2020-10-27 </span>
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今天遇到了一个 JSON 字符串的错误，简单地说就是 js 的 JSON.parse 无法解析换行符，比如下面的例子 Line 1\nLine 2 是一个有效的 js 字符串，但是 JSON 无法解析。 1 2 3 4 5 6 7 try {
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<h1 class="post-title"><a class="post-link" href="/post/2020-07-27-deduction-of-several-haskell-monads/">几个 Haskell Functor/Monad 实例的演算推导</a></h1>
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<span class="post-time"> 2020-07-27 </span>
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<a href="/categories/haskell/"> haskell </a>
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最近学习 Java, 看到 Java 8 以后引进了 lambda, 然后就顺理成章的引入了 Stream 式的函数式编程方式，默认惰性求值，甚至引进了 Optional interface. 这真是没想到，Java 这个浓眉大眼的也
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<h1 class="post-title"><a class="post-link" href="/post/2020-07-23-chainable-javascript-async-method/">可链式调用的 javasrcipt 异步方法</a></h1>
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<span class="post-time"> 2020-07-23 </span>
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有一道经典的 js 面试题是这样的：编写一个类 Walker, 拥有两个方法，一个是 walk, 一个是 sleep, 要求两个方法都能接受一个整数参数，表示函数运行的秒数，并且两个方法都
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<h1 class="post-title"><a class="post-link" href="/post/2020-06-30-md5sum/">如何快速计算 MD5 哈希值</a></h1>
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<span class="post-time"> 2020-06-30 </span>
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<a href="/categories/linux/"> Linux </a>
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大部分语言都内置了 md5 函数，比如 nodejs nodejs 在 node repl 环境下可以调用标准库计算。 1 console.log(require('crypto').createHash('md5').update('example').digest('hex')) 1 1a79a4d60de6718e8e5b326e338ae533 但是如此稍显烦琐，再来需要额外的依赖。可以直接使用大部分 Linux 发行版自
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<h1 class="post-title"><a class="post-link" href="/post/2020-06-12-powershell-style-aliases-for-unix-commands/">Powershell style aliases for unix commands</a></h1>
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<span class="post-time"> 2020-06-12 </span>
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最近基本把 Linux性能优化实战_Linux_性能调优-极客时间 给看完了，从某种角度来讲，可以说就是学习了很多 unix/Linux 命令。我一直觉得 unix 的命令行命
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<h1 class="post-title"><a class="post-link" href="/post/2020-05-18-atomic-ddl/">Atomic DDL</a></h1>
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<span class="post-time"> 2020-05-18 </span>
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<a href="/categories/database/"> database </a>
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上回书 说到原子性 DDL 是将数据库自动迁移应用到生产环境的关键保障。然后，不幸的是 mysql 文档 明确说了： Atomic DDL is not transactional DDL. DDL statements, atomic or otherwise, implicitly end any transaction that is active in the current session, as if
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<h1 class="post-title"><a class="post-link" href="/post/2020-05-17-typeorm-database-migration/">typeorm 数据库自动迁移</a></h1>
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<span class="post-time"> 2020-05-17 </span>
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<a href="/categories/database/"> database </a>
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在小型应用以及应用原型快速开发阶段，关系数据库表定义 自动迁移是非常方便的特性。现在成熟的 ORM 都有所支持。 以 typorm 为例，一般来说，我们进行一次成功的
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<h1 class="post-title"><a class="post-link" href="/post/2020-04-14-git-revert-done-right/">正确使用 git revert</a></h1>
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<span class="post-time"> 2020-04-14 </span>
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最近同事不小心把没测试过特性分支 F 的代码合并到主分支 M 上了，就从 M 上切了个热 补丁分支 H，做了个 revert 操作合并到 M 上去了。之后要布署 F 到开发分支 D
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<h1 class="post-title"><a class="post-link" href="/post/2020-03-03-migrate-to-typescript-strict-mode/">应用 typescript 严格模式</a></h1>
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<span class="post-time"> 2020-03-03 </span>
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<a href="/categories/javascript/"> javascript </a>
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最近上手了 nestjs, 开始了 typescript 之旅。趁着项目新开始不久，免得日后积重难返，对代码应用了 strict 模式。strict 模式包括下文的几个选项，下面依次介绍此次迁移
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