extension CVPixelBuffer { func copy() -> CVPixelBuffer { precondition(CFGetTypeID(self) == CVPixelBufferGetTypeID(), "copy() cannot be called on a non-CVPixelBuffer") var _copy : CVPixelBuffer? // var BytesAlignment:Int = 4 // let CFBytesAlig…

今天在研究一个关于 Bitmap deep copy 的问题, 经过一系列的查询,在StackOverFlow上面找到了答案,遂记录下来: public static Bitmap DeepCopyBitmap(Bitmap bitmap)        {            try            {                Bitmap dstBitmap = bitmap.Clone(new Rectangle(0, 0, bitmap.Width, bitmap.Heig…

本文属原创,转载请注明出处:http://www.cnblogs.com/robinjava77/p/5481874.html   (Robin) Student package base; import java.io.Serializable; /** * Created by robin on 2016/5/11. * * @author robin */ public class Student implements Cloneable,Serializable{ private Str…

Python中对于对象的赋值都是引用,而不是拷贝对象(Assignment statements in Python do not copy objects, they create bindings between a target and an object.).对于可变对象来说,当一个改变的时候,另外一个不用改变,因为是同时的,也就是说是保持同步的. 此时不想让他们同步的话可以使用copy模块,copy.copy()浅拷贝,copy.deepcopy()深拷贝. 前者是对整个对象的拷贝,对…

在使用OpenCV的三维立体重建的库时,一个重要的步骤就是生成左右视图的差异图Disparity,而控制生成disparity的参数的类是cv::StereoBM,我们有时候需要拷贝一份cv::StereoBM,然后改变其中的参数值,但是如果用默认的等号‘=’来进行拷贝,其实是浅拷贝,如果改变拷贝项的参数值,原来的参数值也会跟着改变,所以我们需要自己写一个深拷贝的函数,如下所示: /** * Deep copy cv::StereoBM bm1 to bm2 */ void copy_bm(co…

1.深复制与浅复制的概念 ->浅复制(shallow copy)概念   在SDK Guides中(搜索copy),官方给出的浅复制概念为: Copying compound objects, objects such as collection objects that can contain other objects, must also be done with care. As you would expect, using the = operator to perform a co…

If you learned C++ carefully, you must have known something about the copy of object. For example, I defined a class called \(ABC\),and two variable \(x\) and \(y\) are \(ABC\)s. Like this: class ABC{ public: int a,b; }; int main(){ ABC x,y; x.a=;x.b…

NumPy学习(索引和切片,合并,分割,copy与deep copy) 目录 索引和切片 合并 分割 copy与deep copy 索引和切片 通过索引和切片可以访问以及修改数组元素的值 一维数组 程序示例 import numpy as np #索引与切片 array=np.arange(3,15) print(array) print(array[3])#数组下标为3的元素 print('\n') print(array[1:3])#取从下标1到下标3,不包括下标3 print(array[…

1. '='的赋值方式会带有关联性 >>> import numpy as np >>> a = np.arange(4) >>> b = a >>> c = a >>> d = b >>> a[0] = 11 >>> print(a) [11 1 2 3] #改变a的第一个值,b.c.d的第一个值也会同时改变 >>> b is a True >>&g…

在用到angular.extend的时候,正好碰到一个对象,是层层嵌套的Array, 结果发现只能extend第一层,查阅官文档,确实不支持deep copy: Note: Keep in mind that angular.extend does not support recursive merge (deep copy). 在stackoverflow找到一个方案,只是好像没什么用,看了一下他的写法,原来是在自行判断是否应该进入下一层递归,因为深拷贝的原始需求就是拷贝到最底层的每一个字段,…