大约有 7,000 项符合查询结果（耗时：0.0258秒） [XML]
ActiveRecord.find(array_of_ids), preserving order
...
The answer is for mysql only
There is a function in mysql called FIELD()
Here is how you could use it in .find():
>> ids = [100, 1, 6]
=> [100, 1, 6]
>> WordDocument.find(ids).collect(&:id)
=> [1, 6, 100]
>> WordD...
What are the use cases for selecting CHAR over VARCHAR in SQL?
...rchar, it's free to use 1-3 bytes per character as needed. This is in the MySQL manual: dev.mysql.com/doc/refman/5.0/en/charset-unicode-utf8.html
– Gavin Towey
Mar 27 '14 at 2:14
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Mac SQLite editor [closed]
I am aware of CocoaMySQL but I have not seen a Mac GUI for SQLite, is there one?
15 Answers
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sendmail: how to configure sendmail on ubuntu? [closed]
...t the following, matching up to your smtp server:
AuthInfo:your.isp.net "U:root" "I:user" "P:password"
#Generate the Authentication database, make both files readable only by root
makemap hash client-info < client-info
chmod 600 client-info
cd ..
Add the following lines to sendmail.mc, but bef...
Command not found when using sudo
...un a command using sudo you are effectively running it as the superuser or root.
The reason that the root user is not finding your command is likely that the PATH environment variable for root does not include the directory where foo.sh is located. Hence the command is not found.
The PATH enviro...
List directory in Go
...
"log"
"os"
"path/filepath"
)
func main() {
var (
root string
files []string
err error
)
root := "/home/manigandan/golang/samples"
// filepath.Walk
files, err = FilePathWalkDir(root)
if err != nil {
panic(err)
}
// iout...
How can I connect to Android with ADB over TCP? [closed]
...
Manual Process
From your device, if it is rooted
According to a post on xda-developers, you can enable ADB over Wi-Fi from the device with the commands:
su
setprop service.adb.tcp.port 5555
stop adbd
start adbd
And you can disable it and return ADB to listening on U...
Can the jQuery UI Datepicker be made to disable Saturdays and Sundays (and holidays)?
...file getdate.php
[php]
$sql="SELECT dates FROM holidaydates";
$result = mysql_query($sql);
$chkdate = $_POST['chkdate'];
$str='';
while($row = mysql_fetch_array($result))
{
$str .=$row[0].'';
}
echo $str;
[/php]
Happy Coding !!!! :-)
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What is Common Gateway Interface (CGI)?
...st for page ---> webserver ---[CGI]----> Server side Program ---> MySQL Server.
Most if not all, webservers can be configured to execute a program as a 'CGI'. This means that the webserver, upon receiving a request, will forward the data to a specific program, setting some environment vari...
Conveniently map between enum and int / String
...I always store constants as strings in my databases. (Actually, when using MySql, I store them as MySql enums!)
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