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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...C++ containers is pretty basic). For reference, the boost documentation on composite keys can be found here: boost::multi_index composite keys.When using a composite key, the documentation states that "Composite keys are sorted by lexicographical order, i.e. sorting is performed by the first ke...
How is Docker different from a virtual machine?
...d only part and a write part which are merged together. One could have the common parts of the operating system as read only (and shared amongst all of your containers) and then give each container its own mount for writing.
So, let's say you have a 1 GB container image; if you wanted to use a ful...
lsof survival guide [closed]
lsof is an increadibly powerful command-line utility for unix systems. It lists open files, displaying information about them. And since most everything is a file on unix systems, lsof can give sysadmins a ton of useful diagnostic data.
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Real life example, when to use OUTER / CROSS APPLY in SQL
... For #1 this can be achieved equally using rank, subqueries or common table expressions? Can you provide an example when this isn't true?
– Lee Tickett
Feb 14 '12 at 11:40
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Any good boolean expression simplifiers out there? [closed]
...factoring old code and encountered several IF conditions that were way too complex and long and I'm certain they can be simplified. My guess is that those conditions grew so much because of later modifications.
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Where can I download Spring Framework jars without using Maven?
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community wiki
7 revs, 3 users 79%fujy
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Styling input buttons for iPad and iPhone
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The link above is now dead, unfortunately (thinkvitamin.com/design/…).
– Per Quested Aronsson
Sep 5 '12 at 11:00
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自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
...dubious syntactic constructs (default)
`unsupported' unsupported or incomplete features (default)
`all' all the warnings
`no-CATEGORY' turn off warnings in CATEGORY
`none' turn off all the warnings
`error' treat warnings as errors
Files which are auto...
HTML Script tag: type or language (or omit both)?
...l" xml:lang="en" lang="en">
<head>
<script src="http://example.com/test.js"></script>
</head>
<body/>
</html>
You will be informed of the following error:
Line 4, Column 41: required attribute "type" not specified
So if you're a fan of standards, use it...