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How do I find out what version of WordPress is running?
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Look in wp-includes/version.php
/**
* The WordPress version string
*
* @global string $wp_version
*/
$wp_version = '2.8.4';
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f...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
...jpg");
}
</style>
<img class="MyClass123"/>
Tested and working:
Chrome 14.0.835.163
Safari 4.0.5
Opera 10.6
Tested and Not working:
FireFox 40.0.2 (observing Developer Network Tools, you can see that the URL loads, but the image is not displayed)
Internet Explorer 11...
Oracle SELECT TOP 10 records
....YYYY') AS HISTORY_DATE
FROM HISTORY WHERE
STORAGE_GB IS NOT NULL AND
APP_ID NOT IN (SELECT APP_ID FROM HISTORY WHERE TO_CHAR(HISTORY_DATE, 'DD.MM.YYYY') ='06.02.2009')
ORDER BY STORAGE_GB DESC )
WHERE ROWNUM <= 10
Oracle applies rownum to the result after it has been returned...
JavaScript private methods
... every object instance, it creates a separate function bound to the object and not the class. Also, this does not get garbage collected until the object itself is destroyed.
– Arindam
Feb 6 '12 at 22:37
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Getting Django admin url for an object
Before Django 1.0 there was an easy way to get the admin url of an object, and I had written a small filter that I'd use like this: <a href="{{ object|admin_url }}" .... > ... </a>
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Is there a command to list all Unix group names? [closed]
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To list all local groups which have users assigned to them, use this command:
cut -d: -f1 /etc/group | sort
For more info- >
Unix groups,
Cut command,
sort command
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Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgres
FROM ip_location
WHERE ip = l.ip
...
memory_get_peak_usage() with “real usage”
...4/1024)." MiB\n\n";
$x .= str_repeat(' ', 1024*25); //store 25kb more to string
}
Output:
not real: 0.73469543457031 MiB
real: 0.75 MiB
not real: 0.75910949707031 MiB
real: 1 MiB
...
not real: 0.95442199707031 MiB
real: 1 MiB
not real: 0.97883605957031 MiB
real: 1 MiB
PHP Fatal error: All...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...十分低下。我不希望这样写反射，我希望反射能像：
String str = new String();
这样简单，一行代码搞定！
此外，有很多人都说反射影响性能，在开发的时候要避免用反射。那么什么时候该用反射，什么时候不用反射呢？用什么...
How can I rename a field for all documents in MongoDB?
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and if I'm getting it upsert:true will create field name if field name does not exists, defaults to false.
– IGRACH
Jan 1 '15 at 21:43
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