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[精华]VC++对话框程序打印及打印预览的实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
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void CMyPrintPreviewDlg::OnButton1()
{
// TODO: Add your control notification handler code here
CMyFrame* pf=new CMyFrame(this);
}
2、增加新类：
用ClassWizard新建CMyFrame类（基类CFrameWnd）,功能上相当于文档/视图的应用程序的框架窗口类
用ClassWizard...
Python: Best way to add to sys.path relative to the current running script
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If you don't want to edit each file
Install you library like a normal python libray
or
Set PYTHONPATH to your lib
or if you are willing to add a single line to each file, add a import statement at top e.g.
import import_...
Dynamically load a JavaScript file
...rary.js", type: "text/javascript"});
The problem here is that we do not know when the external script file is fully loaded.
We often want our dependant code on the very next line and like to write something like:
if (iNeedSomeMore) {
Script.load("myBigCodeLibrary.js"); // includes code for ...
Empty set literal?
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By all means, please use set() to create an empty set.
But, if you want to impress people, tell them that you can create an empty set using literals and * with Python >= 3.5 (see PEP 448) by doing:
>>> s = {*()} # or {*{}} or {*[]}
>>> print(s)
set()
this is b...
Get class name of django model
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Instead of doing Book.__class__.__name__ on class itself, if you do it over a book object, then book_object.__class__.__name__ will give you 'Book' (i.e the name of the model)
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What to put in a python module docstring? [closed]
...ion are roughly equivalent to help in terms of amount of information). So if you have in x.py:
"""This module does blah blah."""
class Blah(object):
"""This class does blah blah."""
then:
>>> import x; help(x)
shows:
Help on module x:
NAME
x - This module does blah blah.
FI...
Pandas aggregate count distinct
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This answer is outdated. You can now use nunique directly. See @Blodwyn Pig's solution below
– Ted Petrou
Nov 5 '17 at 20:07
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Calling a class function inside of __init__
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If I'm not wrong, both functions are part of your class, you should use it like this:
class MyClass():
def __init__(self, filename):
self.filename = filename
self.stat1 = None
self.stat2 = None
...
How do I break out of a loop in Scala?
...although they act looplike, it's hard to come up with a consistent way to know what "break" and the like should do. So, to be consistent, the wiser thing to do is not to have a "break" at all.
Note: There are functional equivalents of all of these where you return the value of sum rather than muta...
How to make a JSONP request from Javascript without JQuery?
...ion which logs all items in someone's home. My application is set up and I now want to retrieve all the items in the main bedroom.
My application is on app.home.com. The apis I need to load data from are on api.home.com.
Unless the server is explicitly set up to allow it, I cannot use ajax to load t...