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mysql实现split分割字符串（length, SUBSTRING_INDEX, substring） - 爬虫/...
...，从pos起直到结束
以下通过一个例子查看效果：
代码:SELECT SUBSTRING_INDEX(contentid, '-', 1) first, substring(contentid, 2+length(SUBSTRING_INDEX(contentid, '-', 1))) second, contentid FROM `table_xxx`
Chrome doesn't delete session cookies
...issue in Firefox if you have the "Show my windows and tabs from last time" selection for the "When Firefox starts" pulldown in options. For the same reason. By design, session cookies are being retained to help keep workflow in the event of a browser crash.
– webnesto
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CodeIgniter: Create new helper?
... $ci=& get_instance();
$ci->load->database();
$sql = "select * from table";
$query = $ci->db->query($sql);
$row = $query->result();
}
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“Active Directory Users and Computers” MMC snap-in for Windows 7?
...indows Features dialog box, expand Remote Server
Administration Tools.
Select the remote management tools that you want to install.
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foll...
How to emulate GPS location in the Android Emulator?
...click on the menu button (3 dots) shown below:
Then from the left pane, select Location and change the coordinates according to your needs. After pressing Send button, changes will immediately take effect (I recommend you to open up Google Maps for better understanding).
Android Studio Version...
event.preventDefault() vs. return false
... event handlers for parent elements). Default = browser code (links, text selection, etc.)
– Bob Stein
Jul 28 '13 at 14:49
5
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How to version control a record in a database
...tDate of the second record.
When you want to view the current record, you select the one where endDate is null.
This is sometimes called a type 2 Slowly Changing Dimension.
See also TupleVersioning
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How to copy a directory structure but only include certain files (using windows batch files)
...tion", and "FileName".
It also can only copying specified type of files or selective filenames.
Any improvement are welcome. :)
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Call asynchronous method in constructor?
...rce = writings); works finally :) thank you i solve the problem i am gonna select your answer as best
– Kaan Baris Bayrak
Apr 13 '14 at 21:16
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How is the default max Java heap size determined?
...1.4.2.
In the J2SE platform version 1.4.2 by
default the following selections were
made
initial heap size of 4 Mbyte
maximum heap size of 64 Mbyte
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