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MFC 中CImageList的用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC 中CImageList的用法图像列表控件（CImageList）是相同大小图像的一个集合，每个集合中均以0为图像的索引序号基数，（可以把这些图标看成是以数组方式存储的）...图像列表控件（CImageList）是相同大小图像的一个集合，每个集...
Why should I declare a virtual destructor for an abstract class in C++?
...the answer was originally posted (the Boost documentation at boost.org/doc/libs/1_52_0/libs/smart_ptr/shared_ptr.htm suggests it may have), but it's not true these days that shared_ptr will attempt to delete the object as if it were a Base * - it remembers the type of the thing you created it with. ...
Why use pip over easy_install? [closed]
...When using sudo apt-get Ubuntu/Debian will install Python packages in /usr/lib/python/dist-packages whereas sudo pip or sudo easy_install will install in /local/lib/python/site-packages and unfortunately the Debian/Ubuntu packages often have different names that pip isn't familiar with. The best sol...
Rails.env vs RAILS_ENV
...to the docs, #Rails.env wraps RAILS_ENV:
# File vendor/rails/railties/lib/initializer.rb, line 55
def env
@_env ||= ActiveSupport::StringInquirer.new(RAILS_ENV)
end
But, look at specifically how it's wrapped, using ActiveSupport::StringInquirer:
Wrapping a string in this ...
Using the rJava package on Win7 64 bit with R
...
That is almost correct. This actually works:
install.packages('rJava', .libPaths()[1], 'http://www.rforge.net/')
Watch the punctuation! The mysterious “.libPaths()[1],” just tells R to install the package in the primary library directory. For some reason, leaving the value blank doesn’t wo...
Redefining NULL
...ss.
Nevertheless, with (heavy) modifications to the compiler and standard library, it's not impossible to have NULL be represented with an alternate bit pattern while still remaining strictly conformant to the standard library. It is not sufficient to simply change the definition of NULL itself how...
Rails how to run rake task
...
Have you tried rake reklamer:iqmedier ?
My custom rake tasks are in the lib directory, not in lib/tasks. Not sure if that matters.
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Change Bootstrap tooltip color
...: #f00;
/* Red */
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstr...
API Versioning for Rails Routes
...asts - REST API Versioning. So simple. So maintainable. So effective.
Add lib/api_constraints.rb (don't even have to change vnd.example.)
class ApiConstraints
def initialize(options)
@version = options[:version]
@default = options[:default]
end
def matches?(req)
@default || req....
How to implement classic sorting algorithms in modern C++?
... cousins std::partial_sort and std::nth_element ) from the C++ Standard Library is in most implementations a complicated and hybrid amalgamation of more elementary sorting algorithms , such as selection sort, insertion sort, quick sort, merge sort, or heap sort.
...