大约有 30,000 项符合查询结果（耗时：0.0426秒） [XML]
INSERT IF NOT EXISTS ELSE UPDATE?
..... if you are using any trigger on insert, the accepted answer fires every time. This does not and performs an update only
– PodTech.io
Nov 16 '16 at 13:24
1
...
How to sort by two fields in Java?
...y of this sort of chaining of comparators? Are we essentially sorting each time we chain the comparators? So we do a NlogN operation for each comparator?
– John Baum
Nov 10 '15 at 16:49
...
How to find out what group a given user has?
In Unix/Linux, how do you find out what group a given user is in via command line?
5 Answers
...
How to replace a whole line with sed?
Suppose I have a file with lines
6 Answers
6
...
How to disable XDebug
I think that my server became slow since I installed XDebug.
So, in order to test my hypothesis I want to disable XDebug completely.
I've been searching for tutorials on how to do this but I can't find such information.
...
APT command line interface-like yes/no input?
Is there any short way to achieve what the APT ( Advanced Package Tool ) command line interface does in Python?
19 Answers
...
How to swap the buffers in 2 windows emacs
I am using emacs I find that sometimes I have 2 files separated into 2 windows.
8 Answers
...
val() vs. text() for textarea
...
.val() always works with textarea elements.
.text() works sometimes and fails other times! It's not reliable (tested in Chrome 33)
What's best is that .val() works seamlessly with other form elements too (like input) whereas .text() fails.
...
Rails 3.1: Engine vs. Mountable App
...lowing might help as well:
# generate plugins (NOTE: using same name each time to minimize differences)
# -----------------------------------------------------------------------------
$ rails plugin new test-plugin -T
$ mv test-plugin{,.01}
$ rails plugin new test-plugin -T --mountable
$ mv test-...
Using Node.js only vs. using Node.js with Apache/Nginx
...a static site if your node service crashes. Otherwise users may just get a timed out connection.
Running another web server in front of Node may help to mitigate security flaws and DoS attacks against Node. For a real-world example, CVE-2013-4450 is prevented by running something like Nginx in front...