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C++ catch blocks - catch exception by value or reference? [duplicate]
...s you "slice off" part of the object if you assign a derived object to its base type, which to me seems like a misleading way to look at it because what is actually happening is that in the base class's copy assignment operator base &operator=(const base &other) the derived object is being i...
How to add image to canvas
...ument.getElementById('viewport'),
context = canvas.getContext('2d');
make_base();
function make_base()
{
base_image = new Image();
base_image.src = 'img/base.png';
base_image.onload = function(){
context.drawImage(base_image, 0, 0);
}
}
I.e. draw the image in the onload callback of t...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...POST['dosubmit'])) {
$this->content_check_db = pc_base::load_model('content_check_model');
$this->hits_db = pc_base::load_model('hits_model');
$this->mood_db = pc_base::load_model('mood_model');
$this...
How to use range-based for() loop with std::map?
The common example for C++11 range-based for() loops is always something simple like this:
5 Answers
...
Changes in import statement python3
...script/package.
Consider the following tree for example:
mypkg
├── base.py
└── derived.py
Now, your derived.py requires something from base.py. In Python 2, you could do it like this (in derived.py):
from base import BaseThing
Python 3 no longer supports that since it's not explic...
What is the 'override' keyword in C++ used for? [duplicate]
...that "this is a virtual method, that is overriding a virtual method of the base class."
The compiler also knows that it's an override, so it can "check" that you are not altering/adding new methods that you think are overrides.
To explain the latter:
class base
{
public:
virtual int foo(fl...
What's the best visual merge tool for Git? [closed]
...s for it. And 3-way diff is when you actually see 4 panes with test; merge-base/local/remote/result
– Evgeny
Jan 23 '11 at 13:16
...
How can I get a favicon to show up in my django app?
...
If you have a base or header template that's included everywhere why not include the favicon there with basic HTML?
<link rel="shortcut icon" type="image/png" href="{% static 'favicon.ico' %}"/>
...
Calling parent class __init__ with multiple inheritance, what's the right way?
...The answer to your question depends on one very important aspect: Are your base classes designed for multiple inheritance?
There are 3 different scenarios:
The base classes are unrelated, standalone classes.
If your base classes are separate entities that are capable of functioning independently...
Visually managing MongoDB documents and collections [closed]
...nch of test documents. While I don't have too much trouble using the JSON-based command-line tools, it gets extremely tedious to have to keep searching for documents, copy-and-pasting OIDs, etc., especially from a command prompt window (ever tried to "mark" text that wraps multiple lines?)
...