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When saving, how can you check if a field has changed?
...erson(models.Model):
name = models.CharField()
__original_name = None
def __init__(self, *args, **kwargs):
super(Person, self).__init__(*args, **kwargs)
self.__original_name = self.name
def save(self, force_insert=False, force_update=False, *args, **kwargs):
...
How to check all checkboxes using jQuery?
... Wow thanks for fast answer. This work good but in my app i have one fake check. when i refresh page ctrl+r and click on checkbox checkAll he dont check me all. After that i must check again to be successfull. So i need 2x click on checkAll whay that dont work on single click(one)? I copy ...
Which concurrent Queue implementation should I use in Java?
... wait longer than other threads, causing unpredictable behavior (sometimes one thread will just take several seconds because other threads that started later got processed first). The trade-off is that it takes overhead to manage the fairness, slowing down the throughput.
The most important differe...
In Django, how does one filter a QuerySet with dynamic field lookups?
...face to do so. Sounds like a neat project...
– T. Stone
Sep 23 '09 at 20:23
1
T. Stone - I'd ima...
Right align text in android TextView
...avity="right" is different from android:layout_gravity="right".
The first one affects the position of the text itself within the View, so if you want it to be right-aligned, then layout_width= should be either "fill_parent" or "match_parent".
The second one affects the View's position inside its ...
Why would I prefer using vector to deque
...
To know the difference one should know how deque is generally implemented. Memory is allocated in blocks of equal sizes, and they are chained together (as an array or possibly a vector).
So to find the nth element, you find the appropriate block ...
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
...and only work if you're on the same machine as the database. If the first one fails but the other two succeed, then JDBC connections will also fail. If so, connect to the database using either of the other two and run ALTER SYSTEM REGISTER. Then exit from SQL*Plus and try the first form again.
I...
Free FTP Library [closed]
...
Very... Bad component - you can't easy list files or folders, if you provide bad url - it will run without any exception, but will return html with message - I don't found any file (so, you need to parse that html)... I think microsoft can s...
Side-by-side plots with ggplot2
...
One downside of the solutions based on grid.arrange is that they make it difficult to label the plots with letters (A, B, etc.), as most journals require.
I wrote the cowplot package to solve this (and a few other) issues, s...
What does $.when.apply($, someArray) do?
...little unclear on what this does exactly, looking for an explanation that one line works exactly (not the entire code snippet). Here's some context:
...