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Scala best way of turning a Collection into a Map-by-key?
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234
You can use
c map (t => t.getP -> t) toMap
but be aware that this needs 2 traversals....
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
本帖最后由 zqp2013 于 2015-4-26 14:29 编辑
一、安装MySQL
目前web服务器已经很少有跑静态页面的，如果要跑动态网站那当然就离不开数据库，虽然在以前文章中有写MySQL是怎么安装的，但是感觉好久没...
Unnamed/anonymous namespaces vs. static functions
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The C++ Standard reads in section 7.3.1.1 Unnamed namespaces, paragraph 2:
The use of the static keyword is
deprecated when declaring objects in a
namespace scope, the unnamed-namespace
provides a superior alternative.
Static only applies to names of objects, functions, and anonym...
Can I use a binary literal in C or C++?
...le itoa function, or implement your own.
Unfortunately you cannot do base 2 formatting with STL streams (since setbase will only honour bases 8, 10 and 16), but you can use either a std::string version of itoa, or (the more concise, yet marginally less efficient) std::bitset.
#include <boost/ut...
How to empty a Heroku database
...eed) into one action by executing this:
$ heroku run rake db:setup
Edit 2014-04-18: rake db:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-10-09: You can use rake db:setup with Rails 4. It does give you a Couldn't create database error (because the dat...
Convert a Scala list to a tuple?
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Tom CrockettTom Crockett
27.8k55 gold badges6565 silver badges8585 bronze badges
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Why don't structs support inheritance?
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122
The reason value types can't support inheritance is because of arrays.
The problem is that, fo...
Can a CSV file have a comment?
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120
The CSV "standard" (such as it is) does not dictate how comments should be handled, no, it's up...
Why does multiprocessing use only a single core after I import numpy?
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edited Oct 22 '13 at 22:44
answered Mar 26 '13 at 15:36
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How do I convert a git repository to mercurial?
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edited Sep 2 '17 at 7:01
aditsu quit because SE is EVIL
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