大约有 15,000 项符合查询结果（耗时：0.0254秒） [XML]
How to use GROUP_CONCAT in a CONCAT in MySQL
...
select id, group_concat(`Name` separator ',') as `ColumnName`
from
(
select
id,
concat(`Name`, ':', group_concat(`Value` separator ',')) as `Name`
from mytbl
group by
id,
`Name`
) tbl
group by id;
You can see it i...
Enum type constraints in C# [duplicate]
...: {3} ", IO.FileAccess.ReadWrite, IO.FileAccess.Read, IO.FileAccess.Write, _
Enums.HasFlags(IO.FileAccess.ReadWrite, IO.FileAccess.Read Or IO.FileAccess.Write))
' These fail to compile as expected:
'Console.WriteLine(Enums.HasFlags(IO.FileAccess.ReadWrite, IO.FileOptio...
check if jquery has been loaded, then load it if false
...it will add one dynamically from path specified.
Ref: Simulate an "include_once" for jQuery
OR
include_once equivalent for js. Ref: https://raw.github.com/kvz/phpjs/master/functions/language/include_once.js
function include_once (filename) {
// http://kevin.vanzonneveld.net
// + original b...
How to remove multiple indexes from a list at the same time? [duplicate]
...e is actually a contiguous sequence of indexes, so you can do this:
del my_list[2:6]
which removes the slice starting at 2 and ending just before 6.
It isn't clear from your question whether in general you need to remove an arbitrary collection of indexes, or if it will always be a contiguous se...
How to check if a string is a valid date
...ems to be very forgiving when it comes to dates, e.g. it will parse "FOOBAR_09_2010" as the date 2012-09-09.
– n13
Nov 4 '13 at 12:00
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show...
How can I write output from a unit test?
...cing that if your string has curly braces in it, the method blows up. So "_testContext.WriteLine("hello");" works but "_testContext.WriteLine("he{ll}o");" fails with "System.FormatException: Input string was not in a correct format."
– Mike K
Jul 20 '17 at 21:...
Run command on the Ansible host
... you just want to run a single task on your Ansible host, you can use local_action to specify that a task should be run locally. For example:
- name: an example playbook
hosts: webservers
tasks:
- ...
- name: check out a git repository
local_action: git repo=git://foosball.example.org/...
How to let PHP to create subdomain automatically for each user?
...e rule for grabbing the subdomain would look like this:
RewriteCond %{HTTP_HOST} ^(^.*)\.mywebsite.com
RewriteRule (.*) dostuff.php?username=%1
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improve this answer
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ASP.NET MVC Relative Paths
...ntent/content/ instead of /. To suppress this change, you can set
the IIS_WasUrlRewritten context to false in each Web Page or in
Application_BeginRequest in Global.asax.
They don't actually explain how to do it, but then I found this answer:
If you are running in IIS 7 Integrated Pipeline...
How to execute a MySQL command from a shell script?
...l script like so:
mysql -p=password -u "root" -Bse "CREATE DATABASE \`${1}_database\`;
CREATE USER '$1'@'%' IDENTIFIED BY '$2';
GRANT ALL PRIVILEGES ON `${1}_database`.* TO '$1'@'%' WITH GRANT OPTION;"
Of course, generating SQL through concatenated user input (passed arguments) shouldn't be done ...