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try(A a = new A()) VS try finally

实现了AutoCloseable接口的类，可以在try的时候直接实例化对象。try代码块完成之后，自动调用close方法，相当于在finally里主动调用。...(Cat cat = new Cat())' VS 'try finally' 没有catch（不要被外层的catch迷惑，那只是为了打印异常） static void testV1(){ Utils.println...("----try(Cat cat = new Cat())-----"); try{ try(Cat cat = new Cat()){ cat.sayHello...test v2: 'try(Cat cat = new Cat()) catch{}' VS 'try catch finally' 有catch，并且catch里再抛出异常 static void...testV2(){ Utils.println("----try(Cat cat = new Cat()) catch-----"); try{ try(Cat cat

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Deadlock found when trying to get lock; try restarting transaction

Cause: com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when trying to get...Cause: com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when trying to get...lock; try restarting transaction; Deadlock found when trying to get lock; try restarting transaction...exception is com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when trying to get...lock; try restarting transactionat org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate

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报错解决：Downloading VS Code Server failed. Please try again later.

之前写过教程： Windows下使用VS Code远程SSH连接Linux服务器进行开发 vscode 使用ssh密钥登录远程Linux – vscode remote linux ssh key...---- 如果你的机器无法连接外网，无法下载vs code服务器端，那么会报错如下： Running remote connection script Installing to /home/zhang...Received install output: b7a67c2b-5d04-47c6-8be8-999adf02ef0c##25## Server download failed Downloading VS...Please try again later. ------ 解决方法如下：在下载时查看下载的具体命令： zhang@ubuntu:~$ ps -aux | grep vscode zhang

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使用正则表达式在VS中批量移除 try-catch

但需要注意的是，当 try-catch 嵌套时，外部try-catch将无法对内部 try-catch 捕获的错误进行进一步的处理。...操作现在项目中几乎所有的方法都被 try-catch 包裹，为了将既有的代码中的 try-catch 统一去除，我使用了如下的正则表达式在 Visual Studio 2019 中进行替换（为了保险起见...，应逐个文件替换，替换后大致检查下，并使用 Ctrl + K, Ctrl + F 格式化代码） try\s*?...表示尽可能少的匹配，+ 则表示尽可能多的匹配在 Visual Studio 中使用 $1 $2 .....代表其中的分组（也有部分教程说是使用 \1 \2，可能是老版本的 VS，并没有试验）可能有些...try-catch 的写法不同，仅保证对图示中的写法有效经过评论区的提醒，并不适用于嵌套try-catch的情况（会将原来的逻辑肢解），并且对于正常的try-catch也一并替换了，使用时应当先预览再操作

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【Linux】已解决E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

已解决E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?...然而，有时候在执行这些命令时会遇到如下错误提示： E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing...具体场景包括但不限于：使用apt-get install命令安装新软件包。使用apt-get upgrade命令更新已安装的软件包。...Done E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?...通过遵循上述步骤和注意事项，您应该能够轻松解决“E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing

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Scala的编程规范与最佳实践

重点学习scala的集合类和其API 尽量使用immutable代码，优先使用val和immutable集合使用Option/Some/None/ 忘记 java null的概念使用 try...getRandomNumber 读取用户输入的、或打印输出的方法向存储器读写数据的方法 Java程序中一般很多：字段通常是 mutable的；类似set方法mutable了类内部的字段，而get...scala中的if/else match/case try/catch 都有返回值优点：更易理解的代码；没副作用，更容易测试与scala语法绑定；更适合多核计算机使用match/case...来模式匹配使用场景： try catch 函数或方法的主体中 Option Some None 代码模式中 actor的receive中替代笨拙的 if else if else...map get getOrElse orElse toOption recover recoverWith transform

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聊聊resilience4j的fallback

()) .recover(throwable -> "Hello from Recovery").get(); System.out.println(result...may re-throw (undeclared) exceptions, e.g. on {@code get()}....tries to recover the exception of the failure with {@code f}, * i.e. calling {@code Try.of(() -...NullPointerException if {@code f} is null */ default Try recover(FunctionTry接口有个默认的方法recover，用来实现fallback，它首先判断是不是方法调用失败，如果是才执行fallback方法。

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tensorflow Image解码函数

输出一个RGBA值表示的图像 If needed, the PNG-encoded image is transformed to match the requested number of color...3维分别表示[高度，宽度，通道数] tf.image.decode_jpeg(contents, channels=None, ratio=None, fancy_upscaling=None, try_recover_truncated...3: 输出一个RGB图像 If needed, the JPEG-encoded image is transformed to match the requested number of color...try_recover_truncated: An optional bool. Defaults to False....If true try to recover an image from truncated input. 一个可选的布尔值,默认是假,如果选择"true"则会试图从截断的输入中恢复图像。

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使用python写一个应用程序要求实现微软常用vc++功能排查与安装功能

3737CD5CD6E3/vcredist_x64.exe" }, "2015-2022": { "x86": "https://aka.ms/vs.../17/release/vc_redist.x86.exe", "x64": "https://aka.ms/vs/17/release/vc_redist.x64.exe...", "arm64": "https://aka.ms/vs/17/release/vc_redist.arm64.exe" } }...= 0 def get_installed_versions(self): """获取系统中已安装的VC++版本""" installed = {}...tmp_file: response = requests.get(url, stream=True) response.raise_for_status

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Scala教程之:Future和Promise

println(s"\nStep 3: Call Future.firstCompletedOf to get the results of the first future that completes...to recover from a known exception") donutStock("unknown donut") .recover { case e: IllegalStateException...donut") { donutStockPromise.success(donutStock(donut)) } else { donutStockPromise.failure(Try...(donutStock(donut)).failed.get) } println("\nStep 5: Completing Promise using Promise.complete...=> println(s"Failed to find vanilla donut stock, exception = $e") } donutStockPromise2.complete(Try

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resilience4j小试牛刀

(decoratedSupplier) .recover(throwable -> "Hello from Recovery").get();...()) .recover(throwable -> "Hello from Recovery").get(); System.out.println(result...(decoratedSupplier) .recover(throwable -> "Hello from Recovery").get(); System.out.println...from any exception String result = Try.ofSupplier(decoratedSupplier) .recover...(throwable -> "Hello from Recovery").get(); System.out.println(result); } retry用来控制重试小结

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Tinker源码分析(七):dex合成流程

, try patch dex failed"); return false; } 直接调用了 DexDiffPatchInternal.tryRecoverDexFiles 方法。...true; } // 检查补丁包中的 dex_meta.txt 是否存在 String dexMeta = checker.getMetaContentMap().get(DEX_META_FILE...apk Tinker manager = Tinker.with(context); ZipFile apk = null; ZipFile patch = null; try...checkClassNDexFiles(dir)) { TinkerLog.w(TAG, "class n dex file %s is already exist, and md5 match...//it is ok, just continue TinkerLog.w(TAG, "dex file %s is already exist, and md5 match

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Tinker源码分析(七):dex合成流程

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聊聊claudb的string command

(() -> parse(request)) .map(params -> onSuccess(db, request, params)) .recover(this::...i = 2; i < request.getLength(); i++) { SafeString option = request.getParam(i); if (match....map(Duration::ofMillis) .getOrElseThrow(SyntaxException::new); } else if (match...throw new SyntaxException(); } parameters.ifNotExists = true; } else if (match...throw new SyntaxException(); } } } return parameters; } private boolean match

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聊聊claudb的string command

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go的panic和recover使用

a := [5]int{1, 2, 3, 4, 5} for i := 0; i < 10; i++ { item, ok := get(i, a) fmt.Println...("a[%d]=%d[%v]\n", i, item, ok) } //recover相当于try-catch的catch部分，使得panic不再传递。...而defer相当于try-catch-final的final部分。...} func get(i int, a [5]int) (ret int, ok bool) { ok = true defer func() { err...:= recover() if err !

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使用Vavr进行函数式编程（二）

Option str = Option.of("Hello"); // vavr的几个函数 String[] es = str.transform((a) -> a.get...no.get() : "no,为null"; } } Either Either 表示可能有两种不同类型的值，分别称为左值或右值。只能是其中的一种情况。...Try 接口有两个实现类，Try.Success 和 Try.Failure，分别表示成功和失败的情况。...值得一提的是 Try 的 recover 方法，可以在出现错误时根据异常进行恢复。...进行捕获异常，且对异常进行恢复 Try result = Try.of(() -> 1 / 0).recover(e -> 1); System.out.println

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Spark2.4.0源码分析之WorldCount Stage提交顺序(DAGScheduler)(五)

stageIdToStage.contains(task.stageId)) { // The stage may have already finished when we get this...For instance, some listeners are // doing their own accounting and if they don't get the task end...event.reason match { case Success => task match { case rt: ResultTask[_, _] =...val reason = "Could not recover from a failed barrier ResultStage....val reason = "Could not recover from a failed barrier ResultStage.

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开发体育直播系统，实现前端 Vue.js 实时显示从后端获取的即时比分信息

使用 ThinkPHP 实现从第三方 API 获取比赛数据，并提供接口 GET /api/matches。使用 Vue.js 和 axios 定时请求后端 API，实时更新赛事数据，并在页面上展示。...在 application\route.php 中添加如下路由：use think\facade\Route;Route::get('api/matches', 'index/MatchController..."match.id" class="match-card"> {{ match.league }} {{ match.teamA }} VS {{ match.teamB...}} {{ match.teamA }} VS {{ match.teamB }} {{ match.time }} try

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tensorflow：上下文管理器与 name_scope, variable_scope

: yield vs tf.variable_scope() 都是用已这种方式终结的。..._name_stack: if not _VALID_SCOPE_NAME_REGEX.match(name): raise ValueError("'%s' is...if not _VALID_OP_NAME_REGEX.match(name): raise ValueError("'%s' is not a valid scope name"...% name) try: old_stack = self....try: _get_arg_stack().append(current_scope) yield current_scope finally: _get_arg_stack

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点击加载更多

try(A a = new A()) VS try finally

Deadlock found when trying to get lock; try restarting transaction

报错解决：Downloading VS Code Server failed. Please try again later.

使用正则表达式在VS中批量移除 try-catch

【Linux】已解决E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Scala的编程规范与最佳实践

聊聊resilience4j的fallback

tensorflow Image解码函数

使用python写一个应用程序要求实现微软常用vc++功能排查与安装功能

Scala教程之:Future和Promise

resilience4j小试牛刀

Tinker源码分析(七):dex合成流程

Tinker源码分析(七):dex合成流程

聊聊claudb的string command

聊聊claudb的string command

go的panic和recover使用

使用Vavr进行函数式编程（二）

Spark2.4.0源码分析之WorldCount Stage提交顺序(DAGScheduler)(五)

开发体育直播系统，实现前端 Vue.js 实时显示从后端获取的即时比分信息

tensorflow：上下文管理器与 name_scope, variable_scope

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