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shared_ptr指针被赋值后,原指针会引用清零、自动释放。 - C/C++ - 清泛网 ...

...hared_ptr<int> p) { intg = p; // 原指针释放,存储新的智能指针 //*(intg.get()) = *(p.get()); // 原指针不释放,仅修改原指针指向的内容 } int _tmain(int argc, _TCHAR* argv[]) { { std::shared_ptr<int> sp(new int(2)); ...
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shared_ptr指针被赋值后,原指针会引用清零、自动释放。 - C/C++ - 清泛IT...

...; &nbsp;&nbsp;&nbsp;intg = p;&nbsp; &nbsp;// 原指针释放,存储新的智能指针 &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//*(intg.get()) = *(p.get());&nbsp; &nbsp;// 原指针不释放,仅修改原指针指向的内容 } int _tmain(int argc, _TCHAR* argv[]) { &nbsp; &nbsp;&nbsp; &nbsp;&nbsp...
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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...远不会放弃这个所有权;3.shared_ptr 是可以共享所有权的智能指针。1.auto_ptr 被复制后,将失去原来所致资源的所有权; 2.scoped_ptr永远不能被复制或被赋值!scoped_ptr拥有它所指向的资源的所有权,并永远不会放弃这个所有权; 3...
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google mock分享(全网最全最好的gmock文档,没有之一) - C/C++ - 清泛网 ...

...象. 指针匹配器 Pointee(m) argument (不论是智能指针还是原始指针) 指向的值与匹配器m匹配. 复合匹配器 AllOf(m1, m2, …, mn) argument 匹配所有的匹配器m1到mn AnyOf(m1, m2, …, mn) argument 至少匹配m1...
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How to vertically align an image inside a div

...owrap; /* This is required unless you put the helper span closely near the img */ text-align: center; margin: 1em 0; } .helper { display: inline-block; height: 100%; vertical-align: middle; } img { background: #3A6F9A; vertical-align: middle; max-hei...
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...到Python之中; (9)Pool,内存池管理; (10)smart_ptr,智能指针。 【二、Boost库的编译】 【Setp1 准备工作】: (1)Boost 下载可以到官方网站下载: http://www.boost.org/ (2)安装VS2008 IDE 【Setp2 编译Boost】 1.打开Visual S...
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How to merge a transparent png image with another image using PIL

... def trans_paste(bg_img,fg_img,box=(0,0)): fg_img_trans = Image.new("RGBA",bg_img.size) fg_img_trans.paste(fg_img,box,mask=fg_img) new_img = Image.alpha_composite(bg_img,fg_img_trans) return new_img ...
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Is it possible to make relative link to image in a markdown file in a gist?

... are in the cpp folder. The markdown code used for the first image is ![C++ Var Types](basic_cpp_var_types.png) The markdown code (actually html) used for the second image is &lt;div style='float: center'&gt; &lt;img style='width: 600px' src="prefixpostfixincrement.png"&gt;&lt;/img&gt; &lt;/...
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How to save a PNG image server-side, from a base64 data string

...Exception('did not match data URI with image data'); } file_put_contents("img.{$type}", $data); share | improve this answer | follow | ...
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How can I convert an RGB image into grayscale in Python?

... How about doing it with Pillow: from PIL import Image img = Image.open('image.png').convert('LA') img.save('greyscale.png') Using matplotlib and the formula Y' = 0.2989 R + 0.5870 G + 0.1140 B you could do: import numpy as np import matplotlib.pyplot as plt import matpl...