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TypeScript function overloading

... ...; var n: number = foo1.bar('baz'); // OK var s: string = foo1.bar(123); // OK var a: number[] = foo1.bar([1,2,3]); // ERROR The actual definition of the function must be singular and perform the appropriate dispatching internally on its arguments. For example, using a class (which ...
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淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...,从本质上来讲,这就是广义上的异构“表”之间的JOIN操作。那么,谁来负责这个事情呢?很容易想到,在存储层与前端产品之间增加一个中间层,它负责各个异构“表”之间的数据JOIN和UNION等计算,并且隔离前端产品和后端...
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LR性能指标解释 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...况等,需要在JVM参数中进行配置。 6.Nmon。全面监控linux系统资源使用情况,包括CPU、内存、I/O等,可独立于应用监控。 7.Valgrind。监控C/C++程序是否存在内存泄漏,基于linux环境。 8.Vmmap和ApplicationVerifier。监控C/C++程序是否存在...
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How to round a number to n decimal places in Java

...f.setRoundingMode(RoundingMode.CEILING); for (Number n : Arrays.asList(12, 123.12345, 0.23, 0.1, 2341234.212431324)) { Double d = n.doubleValue(); System.out.println(df.format(d)); } gives the output: 12 123.1235 0.23 0.1 2341234.2125 EDIT: The original answer does not address the acc...
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在线服务的黑天鹅 - 资讯 - 清泛网 - 专注C/C++及内核技术

...难题更能体现在线服务可用性的不可控,可用性是指一个系统中提供服务与设计时间的比例,通常用百分比来表示。在线服务通常看到最多的是以下3种 99.9%,服务中断时间:525.6分钟/年 99.99%,服务中断时间:52.56分钟/年 99.9...
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How to convert wstring into string?

... answered Aug 22 '13 at 7:57 dk123dk123 14k1616 gold badges6060 silver badges7171 bronze badges ...
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What does Expression.Quote() do that Expression.Constant() can’t already do?

...) ex1.Compile(); var f1b = f1a(100); Console.WriteLine(f1b(123)); The lambda has a nested lambda; the compiler generates the interior lambda as a delegate to a function closed over the state of the function generated for the outer lambda. We need consider this case no more. Suppos...
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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...含主键约束条件”。如果将此表的主键增加字段并ENABLE后操作,又说:“ORA-23412: 主表的主键列已更改”。 但有一个奇怪的现象:在数据库B上我们也建立过物化视图,它却在此表的主键disable之后,还是正常运行。 我们介绍...
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printf with std::string?

...r example: std::locale loc(""); std::cout.imbue(loc); std::cout << 123456.78; The nameless locale (the "") picks a locale based on the user's configuration. Therefore, on my machine (configured for US English) this prints out as 123,456.78. For somebody who has their computer configured fo...
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Listening for variable changes in JavaScript

...c.innerHTML = c.innerHTML + '<br />' + t; } // Demo var myVar = 123; Object.defineProperty(this, 'varWatch', { get: function () { return myVar; }, set: function (v) { myVar = v; print('Value changed! New value: ' + v); } }); print(varWatch); varWatch = 456; pri...