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What is the best way to clear a session variable in rails?
... imageUploader: {
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How to get JSON from URL in JavaScript?
...ated 'The JSON is in the data variable'
– Nathan Hornby
Mar 2 '17 at 14:18
2
The pure JavaScript ...
Deleting all pending tasks in celery / rabbitmq
...uck I kill the task, empty the queue, and try again. I detect "stuckness" by looking at the message count for the analytics queue, which should be 0 (finished analytics) or 1 (waiting for last night's analytics to finish). 2 or higher is bad, and I get an email.
celery purge offers to erase tasks...
What does PorterDuff.Mode mean in android graphics.What does it do?
...
Here's an excellent article with illustrations by a Google engineer:
http://ssp.impulsetrain.com/porterduff.html
PorterDuff is described as a way of combining images as if they were "irregular shaped pieces of cardboard" overlayed on each other, as well as a scheme for ...
Warning the user/local/mysql/data directory is not owned by the mysql user
...el prefs appears 'warning the user/local/mysql/data directory is not owned by the mysql user', you have to:
sudo chown -RL root:mysql /usr/local/mysql
sudo chown -RL mysql:mysql /usr/local/mysql/data
sudo /usr/local/mysql/support-files/mysql.server start
...
How to convert a Hibernate proxy to a real entity object
... 5.2.10. the simplest way to do that was to use the unproxy method offered by Hibernate internal PersistenceContext implementation:
Object unproxiedEntity = ((SessionImplementor) session)
.getPersistenceContext()
.unproxy(proxy);
...
Ruby / Rails: convert int to time OR get time from integer?
...nswered May 20 '10 at 6:15
Mark ByersMark Byers
683k155155 gold badges14681468 silver badges13881388 bronze badges
...
Good ways to sort a queryset? - Django
...
What about
import operator
auths = Author.objects.order_by('-score')[:30]
ordered = sorted(auths, key=operator.attrgetter('last_name'))
In Django 1.4 and newer you can order by providing multiple fields.
Reference: https://docs.djangoproject.com/en/dev/ref/models/querysets/#orde...
Add characters to a string in Javascript
... Apr 22 '11 at 11:03
Walter RumsbyWalter Rumsby
6,82555 gold badges3737 silver badges3636 bronze badges
...
转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ix]# /usr/sbin/postfix start
postfix/postfix-script: warning: not owned by postfix: /var/spool/postfix/hold
postsuper: fatal: scan_dir_push: open directory hold: Permission denied
postfix/postfix-script: fatal: Postfix integrity check failed!
呵呵权限问题，看你的postfix的用...