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Context switches much slower in new linux kernels
...you can do this by adding them to the GRUB_CMDLINE_LINUX_DEFAULT entry in /etc/default/grub and then running update-grub. The boot parameters to add are:
intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll
Here are the gory details about what the three boot options do:
Setting intel_idle.ma...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...rmation for my users on my website, aka rapidshare username and passwords, etc... I want to keep information secure, but I know that if I hash their information, I can't retrieve it for later use.
...
Delete files older than 15 days using PowerShell
...ases as the OP is new to PowerShell and may not understand what gci, ?, %, etc. are.
$limit = (Get-Date).AddDays(-15)
$path = "C:\Some\Path"
# Delete files older than the $limit.
Get-ChildItem -Path $path -Recurse -Force | Where-Object { !$_.PSIsContainer -and $_.CreationTime -lt $limit } | Remove...
Fast Bitmap Blur For Android SDK
...p, width, height, false);
Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
if (radius < 1) {
return (null);
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int[] pix = new int[w * h];
Log.e("pix", w + " " + h + " " + pix.length);
...
How to decorate a class?
...ython 2.7, (and @wraps, which maintains the original function's docstring, etc.):
def dec(klass):
old_foo = klass.foo
@wraps(klass.foo)
def decorated_foo(self, *args ,**kwargs):
print('@decorator pre %s' % msg)
old_foo(self, *args, **kwargs)
print('@decorator pos...
Is it possible to get the non-enumerable inherited property names of an object?
...
}
This same template can be applied using Object.getOwnPropertySymbols, etc.
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Named routes _path vs _url
...
As the other answers explain, you should use _url in email links, etc.
But I would like to add that you should also use _url in redirects, as explained here:
https://www.ruby-forum.com/topic/101346#221052
and, here:
http://viget.com/extend/rails-named-routes-path-vs-url
You can also t...
What's the simplest way to subtract a month from a date in Python?
...) Out[23]: datetime.datetime(2016, 11, 29, 0, 0, tzinfo=<StaticTzInfo 'Etc/GMT-8'>) In [24]: created_datetime__lt - relativedelta(month=1) Out[24]: datetime.datetime(2016, 1, 29, 0, 0, tzinfo=<StaticTzInfo 'Etc/GMT-8'>)
– Simin Jie
Dec 29 '16 at ...
Grunt watch error - Waiting…Fatal error: watch ENOSPC
...the below command.
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
For Arch Linux add this line to /etc/sysctl.d/99-sysctl.conf:
fs.inotify.max_user_watches=524288
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How to efficiently compare two unordered lists (not sets) in Python?
...plementation details across versions, how many duplicates are in the data, etc.)
– Raymond Hettinger
Oct 21 '16 at 18:03
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