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MySQL high CPU usage [closed]
... etc. An example of something like this is one I've been working on called PHP Profiler but there are many out there. If you're using a piece of software like Drupal, Joomla or Wordpress you'll want to ask around within the community as there's probably modules available for them that allow you to g...
Loop through all the files with a specific extension
...e answer as someone may copy paste it and find it not working. A perfect example would be someone who is converting all ".jpg" files to ".png" before carrying out a crucial function
– puk
Jul 7 '17 at 19:50
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PHP - iterate on string characters
...ated array
foreach ($array as $char) {
echo $char;
}
You can check the PHP docs for more information: str_split
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Apply multiple functions to multiple groupby columns
...ion.
I recommend making a single custom function that returns a Series of all the aggregations. Use the Series index as labels for the new columns:
def f(x):
d = {}
d['a_sum'] = x['a'].sum()
d['a_max'] = x['a'].max()
d['b_mean'] = x['b'].mean()
d['c_d_prodsum'] = (x['c'] * x['d...
How can I hash a password in Java?
...
You can actually use a facility built in to the Java runtime to do this. The SunJCE in Java 6 supports PBKDF2, which is a good algorithm to use for password hashing.
byte[] salt = new byte[16];
random.nextBytes(salt);
KeySpec spec = new...
Fragment onResume() & onPause() is not called on backstack
...e() are called not only when these events occur in the activity, but for example when you call replace() or add()/remove() while performing transaction, so this answer is misleading at least for the recent versions of Android.
– Dmide
Nov 25 '14 at 14:37
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How to decompile a whole Jar file? [closed]
...
Something like:
jar -xf foo.jar && find . -iname "*.class" | xargs /opt/local/bin/jad -r
maybe?
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SHA1 vs md5 vs SHA256: which to use for a PHP login?
I'm making a php login, and I'm trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt?
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How to remove extension from string (only real extension!)
...
http://php.net/manual/en/function.pathinfo.php
$filename = pathinfo('filename.md.txt', PATHINFO_FILENAME); // returns 'filename.md'
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Win7以上操作系统清理系统图标缓存脚本 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...理系统图标缓存脚本rem 关闭Windows外壳程序explorertaskkill f im explorer.exerem 清理系统图标缓存数据库attrib -h -s -r "%userprofile% AppDa...
rem 关闭Windows外壳程序explorer
taskkill /f /im explorer.exe
rem 清理系统图标缓存数据库
attrib -h -s -r "%use...