大约有 36,000 项符合查询结果（耗时：0.0283秒） [XML]
How to create a MySQL hierarchical recursive query
...nitialisation
where find_in_set(parent_id, @pv)
and length(@pv := concat(@pv, ',', id))
Here is a fiddle.
Here, the value specified in @pv := '19' should be set to the id of the parent you want to select all the descendants of.
This will work also if a parent has multiple children. However...
Convert String to Uri
...o its standards. For example, try to parse: http://www.google.com/search?q=cat|dog. An exception will be thrown for the vertical bar.
urllib makes it easy to convert a string to a java.net.URI. It will pre-process and escape the URL.
assertEquals("http://www.google.com/search?q=cat%7Cdog",
Ur...
Automatically capture output of last command into a variable using Bash?
...lts.
That being said, here is the "solution":
PROMPT_COMMAND='LAST="`cat /tmp/x`"; exec >/dev/tty; exec > >(tee /tmp/x)'
Set this bash environmental variable and issues commands as desired. $LAST will usually have the output you are looking for:
startide seth> fortune
Courtship...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
...String,String> tokens = new HashMap<String,String>();
tokens.put("cat", "Garfield");
tokens.put("beverage", "coffee");
String template = "%cat% really needs some %beverage%.";
// Create pattern of the format "%(cat|beverage)%"
String patternString = "%(" + StringUtils.join(tokens.keySet()...
How to send file contents as body entity using cURL
...
If you want to be real fancy you can do: cat file.txt | curl --data "@-" `(< url.txt )` @- tells curl to read from stdin. You could also just use the redirect (< x.txt ) to put in whatever you want. If you're using bash.
– Breedly
...
How to set bootstrap navbar active class with Angular JS?
...gt;Dogs</a></li>
<li ng-class="{ active: isActive('/cats')}"><a href="/cats">Cats</a></li>
</ul>
</div>
<div ng-view></div>
and include in controllers.js:
function HeaderController($scope, $location)
{
$scope.isActive =...
Replace words in a string - Ruby
...r gsub as a plain text substitution can lead to disastrous results:
'mislocated cat, vindicating'.gsub('cat', 'dog')
=> "mislodoged dog, vindidoging"
Regular expressions have word boundaries, such as \b which matches start or end of a word. Thus,
'mislocated cat, vindicating'.gsub(/\bcat\b/, ...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...,从而不用关联tuple中的第二个元素.
最后介绍一个tuple_cat()函数，通过该函数可以将多个tuple连接起来形成一个tuple（注：在VC11中只能连接两个tuple并不是真正的多个tuple）。
#include <iostream>
#include <utility>
#include <string>
#inclu...
Linux iptables防火墙开放mysql、apache的端口 - 操作系统(内核) - 清泛网 ...
...改配置，添加两条tcp端口允许的记录：[root@iZ23rlmiwviZ ~] cat etc sysconfig iptables sample configuration for iptables service vi /etc/sysconfig/iptables 修改配置，添加两条tcp端口允许的记录：
[root@iZ23rlmiwviZ ~]# cat /etc/sysconfig/iptables
# sample configu...
Copy all the lines to clipboard
...
Plus it won't change cursor location.
– nperson325681
Dec 3 '10 at 10:56
2
...