大约有 30,000 项符合查询结果（耗时：0.0351秒） [XML]
ROW_NUMBER() in MySQL
...n a WordPress Implementation. I needed ROW_NUMBER() and it wasn't there.
http://www.explodybits.com/2011/11/mysql-row-number/
The example in the article is using a single partition by field. To partition by additional fields you could do something like this:
SELECT @row_num := IF(@prev_value...
Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...
#!/bin/bash
# by Dennis Williamson
# 2010-10-06, revised 2010-11-10
# for http://stackoverflow.com/q/3869072
# designed to fit an 80 character terminal
dw=5 # description column width
w=6 # table column width
t () { printf '%-*s' "$w" " true"; }
f () { [[ $? == 1 ]] && printf '%-*s...
What to do Regular expression pattern doesn't match anywhere in string?
...put tag #2 at character 10335:
alt => "Go"
src => "http://g-ecx.images-amazon.com/images/G/01/x-locale/common/transparent-pixel._V192234675_.gif"
type => "image"
Parse Input Tags, See No Evil Input
Here’s the source for the program that produced the output above...
Repository Pattern vs DAL
...
My personal opinion is that it is all about mapping, see: http://www.martinfowler.com/eaaCatalog/repository.html. So the output/input from the repository are domain objects, which on the DAL could be anything. For me that is an important addition/restriction, as you can add a reposi...
What JSON library to use in Scala? [closed]
...log post describes it's use with JAXB Annotations and the Play Framework.
http://krasserm.blogspot.co.uk/2012/02/using-jaxb-for-xml-and-json-apis-in.html
Here is my current JacksonMapper.
trait JacksonMapper {
def jsonSerializer = {
val m = new ObjectMapper()
m.registerModule(DefaultSc...
Link and execute external JavaScript file hosted on GitHub
... will get the latest - which may cause long-term caching)
Examples:
http://raw.githubusercontent.com/<username>/<repo>/<branch>/path/to/file.js
Use this URL to get the latest version:
http://cdn.jsdelivr.net/gh/<username>/<repo>/path/to/file.js
Use this URL ...
List of ANSI color escape sequences
...
There are some more interesting ones along with related info.
http://wiki.bash-hackers.org/scripting/terminalcodes
http://www.termsys.demon.co.uk/vtansi.htm (dead; archive.org snapshot)
http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/c3...
How to validate an email address using a regular expression?
... use.
One RFC 5322 compliant regex can be found at the top of the page at http://emailregex.com/ but uses the IP address pattern that is floating around the internet with a bug that allows 00 for any of the unsigned byte decimal values in a dot-delimited address, which is illegal. The rest of it a...
Principal component analysis in Python
...xis=0)
with the little class Center or the like, below.
See also:
http://en.wikipedia.org/wiki/Principal_component_analysis
http://en.wikipedia.org/wiki/Singular_value_decomposition
Press et al., Numerical Recipes (2 or 3 ed), SVD
PCA micro-tutorial
iris-pca .py .png
"""
f...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...户的角色
清泛网注：以下内容更详细深入，来源：http://www.cnblogs.com/net2012/archive/2013/01/21/2869636.html
问题：如何知道一个session都执行过哪些SQL语句？（查看当前比较容易，历史的呢？怎么复原sql的执行场景——事务关系、...