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Is there a function to make a copy of a PHP array to another?
...r, it has reference semantics.
Edit: @AndrewLarsson raises a point in the comments below. PHP has a special feature called "references". They are somewhat similar to pointers in languages like C/C++, but not quite the same. If your array contains references, then while the array itself is passed by...
SQL Server IN vs. EXISTS Performance
... That's a good point. The IN statement requires SQL Server to generate a complete result set, and then create a big IF statement I think.
– Randy Minder
Jan 14 '10 at 16:04
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how to make twitter bootstrap submenu to open on the left side?
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How can I get Git to follow symlinks?
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NOTE: This advice is now out-dated as per comment since Git 1.6.1. Git used to behave this way, and no longer does.
Git by default attempts to store symlinks instead of following them (for compactness, and it's generally what people want).
However, I accidentally...
Center a position:fixed element
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I found that trick in css-tricks.com/…. But when I change the width and height, it's not moving center. Ya, I should change the margin-left and top when change height and width.
– saturngod
Jan 5 '10 at 12:42
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How can I clone an SQL Server database on the same server in SQL Server 2008 Express?
...> Task -> Backup).
Create empty database with new name (clone). Note comments below as this is optional.
Click to clone database and open restore dialog (see image)
Select Device and add the backup file from step 3.
Change destination to test database
Change location of database files, it ...
SQL Query to concatenate column values from multiple rows in Oracle
...ve - see the oracle documentation on string aggregation techniques. A very common one is to use LISTAGG:
SELECT pid, LISTAGG(Desc, ' ') WITHIN GROUP (ORDER BY seq) AS description
FROM B GROUP BY pid;
Then join to A to pick out the pids you want.
Note: Out of the box, LISTAGG only works correctly...
How to express a One-To-Many relationship in Django
...jango you need to use ForeignKey.
The documentation on ForeignKey is very comprehensive and should answer all the questions you have:
https://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey
The current structure in your example allows each Dude to have one number, and each number to b...
转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。
A:
装mysql的devel和shared包吧，对应版本的，用mysql.com上面的就行
QUOTE:
Q：
安装POSTFIX2.2.7出错
[root@mail postfix-2.2.7]# make
make -f Makefile.in MAKELEVEL= Makefiles
(echo "# Do not edit -- this file documents how Postfix was...
Git for beginners: The definitive practical guide
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edited Jun 20 at 9:12
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answered Nov 26 '08 at 9:26
dbrdbr
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