大约有 40,000 项符合查询结果（耗时：0.0688秒） [XML]
Why Does OAuth v2 Have Both Access and Refresh Tokens?
Section 4.2 of the draft OAuth 2.0 protocol indicates that an authorization server can return both an access_token (which is used to authenticate oneself with a resource) as well as a refresh_token , which is used purely to create a new access_token :
...
Getting A File's Mime Type In Java
I was just wondering how most people fetch a mime type from a file in Java? So far I've tried two utils: JMimeMagic & Mime-Util .
...
Does a foreign key automatically create an index?
...
A foreign key is a constraint, a relationship between two tables - that has nothing to do with an index per se.
But it is a known fact that it makes a lot of sense to index all the columns that are part of any foreign key relationship, because ...
How can we make xkcd style graphs?
...
You might want to consider the following package:
Package xkcd: Plotting ggplot2 graphics in a XKCD style.
library(xkcd)
vignette("xkcd-intro")
Some examples (Scatterplots, Bar Charts):
Scatterplot:
Bar Chart:
...
What is the easiest way to get current GMT time in Unix timestamp format?
Python provides different packages ( datetime , time , calendar ) as can be seen here in order to deal with time. I made a big mistake by using the following to get current GMT time time.mktime(datetime.datetime.utcnow().timetuple())
...
How to count total number of watches on a page?
Is there a way, in JavaScript, to count the number of angular watches on the entire page?
12 Answers
...
Open firewall port on CentOS 7
...
Use this command to find your active zone(s):
firewall-cmd --get-active-zones
It will say either public, dmz, or something else. You should only apply to the zones required.
In the case of public try:
firewall-cmd --zone=public --add-port=2888/tcp --permane...
How does the new automatic reference counting mechanism work?
Can someone briefly explain to me how ARC works? I know it's different from Garbage Collection, but I was just wondering exactly how it worked.
...
Git mergetool with Meld on Windows
... Linux, my favorite merge tool is Meld, and I've had no problems using or configuring it to work with Git. However, in Windows it has been a different story.
...
Understanding Canvas and Surface concepts
...
Here are some definitions:
A Surface is an object holding pixels that are being composited to the screen. Every window you see on the screen (a dialog, your full-screen activity, the status bar) has its own surface that it draws in to, and Surf...