大约有 44,000 项符合查询结果（耗时：0.0381秒） [XML]
Is a view faster than a simple query?
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totally disagree... reading from a view allows the SQL to be rewritten.. and it's generally FASTER to read from a view (than from a dump of the view).
– Aaron Kempf
Jan 9 '13 at 20:23
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Remove data.frame row names when using xtable
OK, I admit this one is a bit uptight (read: "stupid"), and I assume it's quite easy too. I'm writing a report and I want to use xtable package for LaTeX table generation (note that memisc package does the job, but say I want to do this solely with xtable ).
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jQuery Tips and Tricks
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I'm really not a fan of the $(document).ready(fn) shortcut. Sure it cuts down on the code but it also cuts way down on the readability of the code. When you see $(document).ready(...), you know what you're looking at. $(...) is used in far too many other ways to im...
How do you make div elements display inline?
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Having read this question and the answers a couple of times, all I can do is assume that there's been quite a bit of editing going on, and my suspicion is that you've been given the incorrect answer based on not providing enough inf...
Getting new Twitter API consumer and secret keys
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Log into the Twitter Developers section.
If you don't already have an account, you can login with your normal Twitter credentials
Go to "Create an app"
Fill in the details of the application you'll be using to connect with the API
Your application name must be unique. If someon...
Dynamically updating plot in matplotlib
... addition to graph plotting).
No need to do your own loops in a separate thread, the package takes care of it, just give the update frequency you wish. Plus the terminal remains available for monitoring commands while plotting.
See http://www.github.com/ceyzeriat/joystick/ or https://pypi.python.org...
Difference between private, public, and protected inheritance
...n, I'd like to describe member's accessors first in my own words. If you already know this, skip to the heading "next:".
There are three accessors that I'm aware of: public, protected and private.
Let:
class Base {
public:
int publicMember;
protected:
int protectedMember;...
How do I print a double value with full precision using cout?
...ill give you the 100% accurate precision of the double... and be utterly unreadable because humans can't read IEEE double format ! Wikipedia has a good write up on how to interpret the binary bits.
In newer C++, you can do
std::cout << std::hexfloat << 1.1;
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C state-machine design [closed]
...am building one small-ish state-machine at the heart of one of my worker thread.
27 Answers
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Is there a way to perform “if” in python's lambda
... a comment recommending it, which makes at least seven people--didn't even read the original question.
– Glenn Maynard
Oct 19 '09 at 22:48
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