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Check if element exists in jQuery [duplicate]
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@trejder Most likely the poster was unaware of Vanilla JS and when they said "vanilla JavaScript" they actually meant base JavaScript ("vanilla" as in "plain", "unadorned).
– D Coetzee
Dec 12 '13 at 22:40
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django : using select_related and get_object_or_404 together
Is there any way of using get_object_or_404 and select_related together or any other way to achieve the result of using these two together(except from putting it in try/except)??
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Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
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This is what solved it for us and these folks:
Our project started with Django 1.4, we went to 1.5 and then to 1.7. Our wsgi.py looked like this:
import os
from django.core.handlers.wsgi import WSGIHandler
os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp...
Database Structure for Tree Data Structure
...o-nested-sets
There are other models as well, including materialized path and nested sets:
http://communities.bmc.com/communities/docs/DOC-9902
Joe Celko has written a book on this subject, which is a good reference from a general SQL perspective (it is mentioned in the nested set article link abo...
Usage of protocols as array types and function parameters in swift
.... Such protocols use Self or associatedtype keywords in their definitions (and Equatable is one of them).
In some cases it's possible to use a type-erased wrapper to make your collection homomorphic. Below is an example.
// This protocol doesn't provide polymorphism over the types which implement ...
How to install psycopg2 with “pip” on Python?
I'm using virtualenv and I need to install "psycopg2".
33 Answers
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How do I check if a directory exists? “is_dir”, “file_exists” or both?
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considering it takes post input and uses it as-is, plus makes 0777 dir, prolly not that safe at all ;P
– sEver
Aug 20 '13 at 16:45
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How to search a Git repository by commit message?
...-all)
to show all instances of the given text, the containing file name, and the commit sha1.
Finally, as a last resort in case your commit is dangling and not connected to history at all, you can search the reflog itself with the -g flag (short for --walk-reflogs:
git log -g --grep='Build 0051'...
How to close a Java Swing application from the code
What is the proper way to terminate a Swing application from the code, and what are the pitfalls?
9 Answers
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_=> what does this underscore mean in Lambda expressions?
...nswered May 6 '10 at 4:04
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