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What is the difference between buffer and cache memory in Linux?

...ear what's the difference between the two Linux memory concepts : buffer and cache . I've read through this post and it seems to me that the difference between them is the expiration policy: ...
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Some questions about Automatic Reference Counting in iOS5 SDK

... currently developing an app for iPad. The development started for iOS 4.2 and is now continuing (and I think will be completed) for iOS 4.3. I just read about ARC in iOS 5, and basically I understood that we will never need to release and retain objects anymore. My questions are: ...
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Functional style of Java 8's Optional.ifPresent and if-not-Present?

...n Java 8, I want to do something to an Optional object if it is present, and do another thing if it is not present. 12 An...
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Does Python have an ordered set?

...s referred to from the Python 2 Documentation. This runs on Py2.6 or later and 3.0 or later without any modifications. The interface is almost exactly the same as a normal set, except that initialisation should be done with a list. OrderedSet([1, 2, 3]) This is a MutableSet, so the signature for ...
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How can you encode a string to Base64 in JavaScript?

... You can use btoa() and atob() to convert to and from base64 encoding. There appears to be some confusion in the comments regarding what these functions accept/return, so… btoa() accepts a “string” where each character represents an 8-b...
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Running Selenium WebDriver python bindings in chrome

... You need to make sure the standalone ChromeDriver binary (which is different than the Chrome browser binary) is either in your path or available in the webdriver.chrome.driver environment variable. see http://code.google.com/p/selenium/wiki/ChromeDrive...
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static files with express.js

I want to serve index.html and /media subdirectory as static files. The index file should be served both at /index.html and / URLs. ...
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Check if list contains any of another list

... performing on larger collections would be to project parameters to source and then use Intersect which internally uses a HashSet<T> so instead of O(n^2) for the first approach (the equivalent of two nested loops) you can do the check in O(n) : bool hasMatch = parameters.Select(x => x.sour...
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Viewing contents of a .jar file

... @salvob You don't need the hyphen as it takes after tar with the options mandatory. – Tom Hawtin - tackline Jan 12 '17 at 16:51 2 ...
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Linux C++ 单元测试与gcov代码覆盖率统计 - C/C++ - 清泛网 - 专注C/C++及内核技术

Linux C++ 单元测试与gcov代码覆盖率统计gtest-and-coverage本文主要介绍Linux下C++单元测试下的代码覆盖率统计的方法,测试框架采用gtest,当然也可以使用其他的,这里不做过多的说明,主要介绍代码的覆盖率统计方法。一、什么是gco...