shallow-copy Questions
1
Solved
I learned that when using Object.assign() it extends only the top level object. How can I deeply extend the object? For example, let's say I have the following source object:
const source = ...
Shovel asked 9/4, 2018 at 6:32
7
Solved
I've been saving all the data received from services direct to local variable, controller, or scope. What I suppose would be considered a shallow copy, is that correct?
Example:
DataService.callF...
Beane asked 9/10, 2015 at 17:16
1
Solved
The are several alternatives to make a shallow copy of a list in Python 3.5+. The obvious ones are:
some_list.copy()
some_list[:]
list(some_list)
[*some_list]
and others...
Which method i...
Korte asked 17/12, 2017 at 21:9
9
Solved
It appears that in PHP objects are passed by reference. Even assignment operators do not appear to be creating a copy of the Object.
Here's a simple, contrived proof:
<?php
class A {
public ...
Abridgment asked 9/10, 2008 at 4:21
5
Solved
I have two objects of the same type and need to copy property values from one object to another. There are two options:
Use reflection, navigate through the properties of the first object and cop...
Cyrillus asked 18/11, 2011 at 11:14
6
Solved
I am a bit new to these two methods of copying one object into the other. I am confused and unable to spot out the major difference between deep copy and shallow copy.. I had gone through a lots of...
Apocarp asked 5/8, 2013 at 19:45
2
Solved
In python, if I have
x = y
any modification to x will also modify y, and I can do
x = deepcopy(y)
if I want to avoid modifying y while working on x
Say, instead, that I have:
myFunc():
r...
Tyrannize asked 3/2, 2017 at 20:18
1
Solved
For the below array,
var a[2][3]int
a[0][0] = 55
a[0][1] = 56
a[0][2] = 57
a[1][0] = 65
a[1][1] = 66
a[1][2] = 67
on performing array copy,
a[0] = a[1]
Question:
Is the array(a[0]) copy a ...
Seeress asked 27/1, 2017 at 4:39
8
Solved
I have a long class with a lot of data members. I want to write a copy constructor for it. But, if I write my own copy constructor, I lose access to the default copy constructor.
I just want to rep...
Coxcombry asked 14/9, 2012 at 10:52
3
Solved
If i have a code like this
class Student
{
public string RollID { get; set; }
}
class Person
{
public Student student { get; set; }
public string Address { get; set; }
public string Name { ge...
Nidia asked 8/11, 2016 at 13:27
3
Solved
I am trying to understand the concept of shallow vs deep copy in Java.
There is a lot of articles and Q&A about this subject, but whenever I try to implement these concepts in a real Java code,...
Mysia asked 28/7, 2016 at 16:4
1
Solved
I'm looking for a simple way to return a new structure which is a copy of an existing one with some fields changed, without modifying the original.
I get that you can use setf to change the data i...
Journalize asked 17/7, 2016 at 13:25
4
Solved
Explanation :
we come across some situation in which we need to copy one object to another object. In that case, we probably have two solutions: angular.copy() or angular.extend().
Challenge i am f...
Etymon asked 24/4, 2016 at 19:28
4
Yesterday I asked a question about copying objects in C#, and most answers focussed on the difference between deep copy and shallow copy, and the fact that it should be made clear which of both cop...
Garibold asked 28/7, 2010 at 7:24
4
Solved
I'm taking a class on object oriented programming using C++.
In our text it says,
If we do not declare a copy constructor, the compiler inserts code
that implements a shallow copy. If we do not de...
Osmic asked 22/10, 2015 at 16:58
3
Solved
As I understand it, there are a couple of ways (maybe others as well) to create a shallow copy of a Map in Java:
Map<String, Object> data = new HashMap<String, Object>();
Map<String...
Culprit asked 1/3, 2010 at 15:23
2
Solved
Given:
class Foo {
private:
static int cntFoos;
//... stuff...
public:
Foo() { cntFoos++; }
~Foo() { cntFoos--; }
};
... where "stuff" may be any set of properties. (The idea is to have a...
Dent asked 4/12, 2014 at 20:18
3
Solved
Assuming I have 2 array of different size i.e
int arr[] = {0,1,2,3,4,5,6,7,8,9};
int *arr2 = new int[5];
I want to shallow copy some of them,
Deep copy equivalent would be
int j =0;
if(!(i%2))...
Meggs asked 31/7, 2014 at 4:29
7
Solved
I was recently looking into freeing up memory occupied by Java objects. While doing that I got confused about how objects are copied (shallow/deep) in Java and how to avoid accidently clearing/null...
Anthemion asked 2/8, 2013 at 6:12
2
For copying a list: shallow_copy_of_list = old_list[:].
For copying a dict: shallow_copy_of_dict = dict(old_dict).
But for a set, I was worried that a similar thing wouldn't work, because saying ...
Oxidate asked 21/4, 2014 at 16:1
4
Solved
I have a general question about deep- and shallow-copy in the context of the pass-by-reference- and pass-by-value-concept of C#:
In C# it is a requirement to explicitly create methods that accept ...
Pouter asked 13/4, 2014 at 9:56
1
Solved
Why is shallow-copying a list using a slice so much faster than using list builtin?
In [1]: x = range(10)
In [2]: timeit x_ = x[:]
10000000 loops, best of 3: 83.2 ns per loop
In [3]: timeit x_ =...
Bulwark asked 1/4, 2014 at 20:23
2
Solved
I have an IEnumerable object as:
IEnumerable<string> listSelectedItems;
Which contains three items. Now i created a new object and want to get all items from listSelectedItems, so i wrote...
Variegate asked 19/10, 2013 at 7:9
2
Solved
In Perl, you can assign to a variable a reference to another variable, like this:
my @array = (1..10);
my $ref = \@array;
And, as it is a reference, you can do something like this and both varia...
Exception asked 6/4, 2013 at 3:35
1
I need to add a UIElement to two different canvases, but one UIElement can only be a child of ONE canvas, so I have to create a ShallowCopy (DeepCopy not needed) of the UIElement.
I want to use Me...
Thrall asked 23/11, 2012 at 1:10
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