大约有 18,900 项符合查询结果（耗时：0.0367秒） [XML]
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...ion why not use django core's Paginator and Page objects documented here:
https://docs.djangoproject.com/en/dev/topics/pagination/
Something like this:
from django.core.paginator import Paginator
from djangoapp.models import model
paginator = Paginator(model.objects.all(), 1000) # chunks of 1000...
What is the difference between user and kernel modes in operating systems?
...a bare metal setup that should be a good way to manipulate rings directly: https://github.com/cirosantilli/x86-bare-metal-examples
I didn't have the patience to make a userland example unfortunately, but I did go as far as paging setup, so userland should be feasible. I'd love to see a pull request...
How to cache data in a MVC application
...s that are designed for both Web and non-Web applications.
More info:
https://msdn.microsoft.com/en-us/library/dd997357(v=vs.110).aspx
https://docs.microsoft.com/en-us/dotnet/framework/performance/caching-in-net-framework-applications
...
write a shell script to ssh to a remote machine and execute commands
... AWX which is the open-source edition of their commercial Tower.
Ansible: https://www.ansible.com/
AWX:https://github.com/ansible/awx
Ansible Tower: commercial product, you will probably fist explore the free open-source AWX, rather than the 15days free-trail of Tower
...
What's the best way to retry an AJAX request on failure using jQuery?
...what tells JQuery to retry $.ajax requests
// Ideas for this borrowed from https://stackoverflow.com/a/12446363/491553
$.ajaxPrefilter(function(opts, originalOpts, jqXHR) {
if(opts.retryCount === undefined) {
opts.retryCount = 3;
}
// Our own deferred object to handle done/fail callbacks
...
How can I prevent the scrollbar overlaying content in IE10?
...n on this bug.
//
// For more information, see the following:
//
// Issue: https://github.com/twbs/bootstrap/issues/10497
// Docs: http://getbootstrap.com/getting-started/#support-ie10-width
// Source: http://timkadlec.com/2013/01/windows-phone-8-and-device-width/
// Source: http://timkadlec.com/201...
Location Services not working in iOS 8
...
According to the Apple docs:
https://developer.apple.com/documentation/corelocation/requesting_permission_to_use_location_services
https://developer.apple.com/documentation/corelocation/cllocationmanager/1620562-requestwheninuseauthorization
As of iOS ...
Long vs Integer, long vs int, what to use and when?
...ent (even unclear) memory-sizes of the primitive types:
Java - all clear: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
byte, char .. 1B .. 8b
short int .. 2B .. 16b
int .. .. .. .. 4B .. 32b
long int .. 8B .. 64b
C .. just mess: https://en.wikipedia.org/wiki/C_data_...
In-memory size of a Python structure
... "How big is this complex object in memory?"
There's a great answer here: https://goshippo.com/blog/measure-real-size-any-python-object/
The punchline:
import sys
def get_size(obj, seen=None):
"""Recursively finds size of objects"""
size = sys.getsizeof(obj)
if seen is None:
...
What is the non-jQuery equivalent of '$(document).ready()'?
...nsole.log("DOM is ready, come and get it!"));
Additional Readings
https://developer.mozilla.org/en-US/docs/Web/Events/DOMContentLoaded
Checking whether loading is already complete
https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState
Update
Here's some quick utility h...