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AtomicInteger lazySet vs. set
... structures. The semantics are
that the write is guaranteed not to be re-ordered with any
previous write, but may be reordered with subsequent operations
(or equivalently, might not be visible to other threads) until
some other volatile write or synchronizing action occurs).
The main us...
Installing python module within code
...rmore since pip v10, all code has been moved to pip._internal precisely in order to make it clear to users that programmatic use of pip is not allowed.
Use sys.executable to ensure that you will call the same pip associated with the current runtime.
import subprocess
import sys
def install(packag...
IOCTL Linux device driver [closed]
...driver can define an ioctl which allows a userspace application to send it orders. However, ioctls are not very flexible and tend to get a bit cluttered (dozens of "magic numbers" which just work... or not), and can also be insecure, as you pass a buffer into the kernel - bad handling can break thin...
How to delete an app from iTunesConnect / App Store Connect
...pp, “XXX”. Recent changes have been made to the App Delete feature. In order to delete your app from iTunes Connect, you must now have one approved version before the delete button becomes available. For more information on the recent changes, please see the "Deleting an App" section of the iTun...
Check to see if python script is running
...
This works BEAUTIFULLY. It just has to be run as root in order to run on Ubuntu. +1
– Jimmy
Oct 31 '15 at 14:57
11
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What is the benefit of using $() instead of backticks in shell scripts?
...utomatically relicense away from SO defaults (CC-BY-SA or MIT licenses) in order to allow for such warranties or fitness of purpose. I would instead reuse code on SO at my own risk, and vote contributions according to helpfulness, technical merits, etc.
– chrstphrchvz
...
Is SQL syntax case sensitive?
...ive (default). You have to make a case-insensitive file-system on Linux in order for mysql case-insensitivity to work the same way as on windows (=properly). Especially turning it on/off after some work in one another mode can bear bad consequences.
– Stefan Steiger
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What are the most common naming conventions in C?
...ING_ID_PREFIX.
Struct names and typedef's in camelcase: GtkWidget, TrackingOrder.
Functions that operate on structs: classic C style: gtk_widget_show(), tracking_order_process().
Pointers: nothing fancy here:
GtkWidget *foo, TrackingOrder *bar.
Global variables: just don't use global variables. They...
Replacing NAs with latest non-NA value
... = TRUE), y = sample(c(1:4, rep(NA, 4)), 20 , replace = TRUE))
dt <- dt[order(group)]
dt[, y_forward_fill := y[1], .(group, cumsum(!is.na(y)))]
dt
group y y_forward_fill
1: a NA NA
2: a NA NA
3: a NA NA
4: a 2 2
5: a ...
What is a serialVersionUID and why should I use it?
...I wouldn't expect it to say you need one - but it may be suggesting one in order to help you serialize exceptions correctly. If you're not going to serialize them, you really don't need the constant.
– Jon Skeet
Jun 15 '14 at 18:43
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