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Only read selected columns

...wever. Large files are usually compressed. – CoderGuy123 Feb 28 '16 at 9:03 There is a feature request for enabling th...
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术

...示区域。 有时候应用也需要能够主动引发窗口中的绘制操作,比如当窗口显示的数据改变的时候,这一般是通过InvalidateRect和 InvalidateRgn函数来完成的。InvalidateRect和InvalidateRgn把指定的区域加到窗口的Update Region中,当应用的消...
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How to design a multi-user ajax web application to be concurrently safe

...x is acquired Server receives "Hey, I know artifact x's state from version 123, let me set it to value foo pls." If the Serverside version of artifact x is equal (can not be less) than 123 the new value is accepted, a new version id of 124 generated. The new state-information "updated to version 124...
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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...大的Internet用户,试图影响大多数的Internet上的电子邮件系统,因此它是免费的。 2. 更快: postfix在性能上大约比sendmail快三倍。一部运行postfix的台式PC每天可以收发上百万封邮件。 3. 兼容性好: postfix是sendmail兼容的,从...
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Two sets of parentheses after function call

...'s possible to immediately call the returned function: $filter('number')('123') Alternatively, you may keep the returned function for future use: var numberFilter = $filter('number'); numberFilter('123') share ...
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What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for Code

... | | false | “false” | 0 | | 123 | “123” | 123 | | [] | “” | 0 | | {} | “[object Object]” | NaN | +-----------------+-------------------+--------...
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Copy a variable's value into another

...your top-level object. For example, given this object: var obj = { w: 123, x: { y: 456, z: 789 } }; If you do a shallow copy of that object, then the x property of your new object is the same x object from the original: var copy = $.extend( {}, obj ); copy.w = 321; co...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...好依赖关系后,后续的那一行定义了如何生成目标文件的操作系统命令,一定要以一个Tab键作为开头。记住,make并不管命令是怎么工作的,他只管执行所定义的命令。make会比较targets文件和prerequisites文件的修改日期,如果prerequi...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...好依赖关系后,后续的那一行定义了如何生成目标文件的操作系统命令,一定要以一个Tab键作为开头。记住,make并不管命令是怎么工作的,他只管执行所定义的命令。make会比较targets文件和prerequisites文件的修改日期,如果prerequi...
https://www.tsingfun.com/it/cp... 

Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...好依赖关系后,后续的那一行定义了如何生成目标文件的操作系统命令,一定要以一个Tab键作为开头。记住,make并不管命令是怎么工作的,他只管执行所定义的命令。make会比较targets文件和prerequisites文件的修改日期,如果prerequi...