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Is it possible to use Java 8 for Android development?
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UPDATE 2017/11/04 - Android Studio 3.0 now has native support for Java 8. gradle-retrolambda is now no longer needed. See https://developer.android.com/studio/write/java8-support.html
The above link also includes migration instructions if you are using gradle-ret...
Why use sprintf function in PHP?
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This. Now add numbered arguments and translations :]
– Konerak
Apr 23 '12 at 16:57
add a comment
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RAII and smart pointers in C++
... should be anyway), closing the file is taken care of for us. So, our code now looks something like:
File file("/path/to/file");
// Do stuff with file
// No need to close it - destructor will do that for us
This cannot be done in Java since there's no guarantee when the object will be destroyed, ...
HTML5 form required attribute. Set custom validation message?
...field empty it shows the message, then enter something in the field but it now shows an empty message and the action isn't executed. If you now click the button again, it will go through.
– thomasvdb
Sep 6 '12 at 11:36
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How to check if a number is a power of 2
...that
is, the result is true if and only if both its operands are true.
Now let's take a look at how this all plays out:
The function returns boolean (true / false) and accepts one incoming parameter of type unsigned long (x, in this case). Let us for the sake of simplicity assume that someone ...
How to convert a data frame column to numeric type?
... that you should apply transform function in order to complete your task.
Now I'm about to demonstrate certain "conversion anomaly":
# create dummy data.frame
d <- data.frame(char = letters[1:5],
fake_char = as.character(1:5),
fac = factor(1:5),
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What's the difference between git reset --mixed, --soft, and --hard?
...e index matches C.
When we run git reset --soft B, master (and thus HEAD) now points to B, but the index still has the changes from C; git status will show them as staged. So if we run git commit at this point, we'll get a new commit with the same changes as C.
Okay, so starting from here again:...
Remote debugging with Android emulator
...k configuration above, open Putty, go to Connection > SSH > Tunnels. Now add an entry with Source-port: 5556 and Destination: localhost:5554. Repeat the same with Source-port: 5557 and Destination: localhost:5555. Cheers!
– gsbabil
Jul 30 '13 at 16:54
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How to process SIGTERM signal gracefully?
... to use solution:
import signal
import time
class GracefulKiller:
kill_now = False
def __init__(self):
signal.signal(signal.SIGINT, self.exit_gracefully)
signal.signal(signal.SIGTERM, self.exit_gracefully)
def exit_gracefully(self,signum, frame):
self.kill_now = True
if __name_...
String vs. StringBuilder
... the enormous performance difference in my applications between the two, I now think about it a little more carefully.
Luckily, it's relatively straightforward to run performance analysis on your code to see where you're spending the time, and then to modify it to use StringBuilder where needed.
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