大约有 25,300 项符合查询结果（耗时：0.0498秒） [XML]
How do you design object oriented projects? [closed]
I'm working on a large project (for me) which will have many classes and will need to be extensible, but I'm not sure how to plan out my program and how the classes need to interact.
...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
After conducting some experiments on square matrices of different sizes, a pattern came up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
...
Count number of occurences for each unique value
...mmyData)
# dummyData
# 1 2
# 25 75
## or another presentation of the same data
as.data.frame(table(dummyData))
# dummyData Freq
# 1 1 25
# 2 2 75
share
|
improve this a...
Showing line numbers in IPython/Jupyter Notebooks
...ent notebook versions Shift-L should toggle for all cells.
If you can't remember the shortcut, bring up the command palette Ctrl-Shift+P (Cmd+Shift+P on Mac), and search for "line numbers"), it should allow to toggle and show you the shortcut.
...
How to Test a Concern in Rails
... have a Personable concern in my Rails 4 application which has a full_name method, how would I go about testing this using RSpec?
...
What is a “first chance exception”?
...es it originate in a .NET program? And why is it called by that peculiar name (what 'chance' are we talking about)?
5 Answe...
What are some better ways to avoid the do-while(0); hack in C++?
... use returns instead of breaks. While all these checks correspond to the same level of abstraction as of the function, it is quite logical approach.
For example:
void foo(...)
{
if (!condition)
{
return;
}
...
if (!other condition)
{
return;
}
...
if (!anothe...
How to ignore user's time zone and force Date() use specific time zone
In an JS app, I receive timestamp (eq. 1270544790922 ) from server (Ajax).
7 Answers
...
Find a private field with Reflection?
...
Works great - FYI VB.NET version Me.GetType().GetFields(Reflection.BindingFlags.NonPublic Or Reflection.BindingFlags.Instance)
– gg.
May 27 '09 at 7:36
...
What's the best solution for OpenID with Django? [closed]
...
The one that has proven to work best for me, and which seems most up-to-date is the one over at launchpad.
It integrated seamlessly with my application that already utilizes the django.auth module.
https://launchpad.net/django-openid-auth
To get a copy run:
bzr ...