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What's the idiomatic syntax for prepending to a short python list?
...eally only efficient for rather short lists, as you ask.
Here's a snippet from the CPython source where this is implemented - and as you can see, we start at the end of the array and move everything down by one for every insertion:
for (i = n; --i >= where; )
items[i+1] = items[i];
If you...
How to expire session due to inactivity in Django?
...ession is expired. something like this should handle the whole process...
from datetime import datetime
from django.http import HttpResponseRedirect
class SessionExpiredMiddleware:
def process_request(request):
last_activity = request.session['last_activity']
now = datetime.now...
Convert string to binary in python
...earray(sample_string,encoding='utf-8')))
if __name__ == '__main__':
from timeit import timeit
sample_string = 'Convert this ascii strong to binary.'
print(
timeit(f'method_a("{sample_string}")',setup='from __main__ import method_a'),
timeit(f'method_b("{sample_string...
Java compile speed vs Scala compile speed
...the work.
That said, compile times have already improved noticeably going from Scala 2.7 to Scala 2.8, and I expect the improvements to continue now that the dust has settled on 2.8. This page documents some of the ongoing efforts and ideas to improve the performance of the Scala compiler.
Martin ...
Call one constructor from another
...method other than the constructor example init(). You can call this method from any of your constructors.
– Abdullah Shoaib
Aug 4 '16 at 7:35
...
Closing WebSocket correctly (HTML5, Javascript)
...frame consisting of just a 0xFF byte
followed by a 0x00 byte is sent from one peer to ask that the other peer
close the connection.
If you are writing a server, you should make sure to send a close frame when the server closes a client connection. The normal TCP socket close method can...
How to solve the “failed to lazily initialize a collection of role” Hibernate exception
...
From my experience, I have the following methods to solved the famous LazyInitializationException:
(1) Use Hibernate.initialize
Hibernate.initialize(topics.getComments());
(2) Use JOIN FETCH
You can use the JOIN FETCH sy...
How to change the text of a button in jQuery?
... wrapped it in a .click() call, of course
EDIT 2 : Newer jQuery versions (from > 1.6) use .prop rather than .attr
EDIT 3 : If you're using jQuery UI, you need to use DaveUK's method (below) of adjusting the text property
...
Print “hello world” every X seconds
...c void run() {
System.out.println("Hello World!");
}
}
// And From your main() method or any other method
Timer timer = new Timer();
timer.schedule(new SayHello(), 0, 5000);
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im...
Inner class within Interface
...made of it.
Now I won't comment on the usefulness of such a construct and from I've seen: I've seen it, but it's not a very common construct.
200KLOC codebase here where this happens exactly zero time (but then we've got a lot of other things that we consider bad practices that happen exactly zero...