大约有 30,000 项符合查询结果（耗时：0.0491秒） [XML]
When saving, how can you check if a field has changed?
...oblem if you have several application servers working against the same database as it only tracks changes in memory
– Jens Alm
Sep 2 '12 at 7:36
13
...
MSTest copy file to test run folder
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Select between two dates with Django
... Is the "created_at" an arbitrary field in a model or is this the databases actual log of when the record was created?
– Bigbob556677
Mar 2 '18 at 14:22
...
ObjectiveC Parse Integer from String
...truncated).
I've made a macro that will convert input text to an NSNumber based on a locale argument which can be nil (if nil it uses device current locale).
#define stringToNumber(__string, __nullable_locale) (\
(^NSNumber *(void){\
NSLocale *__locale = __nullable_locale;\
if (!__locale) {\
__loca...
What is the performance cost of having a virtual method in a C++ class?
...ing as virtual. If all functions are virtual everything can be replaced by base classes - public, protected, private - everything becomes fair game. By accident or intention subclasses could then change the behavior of functions that then cause problems when used in the base implementation.
...
Scripting Language vs Programming Language [closed]
..., I'd call that "scripting;" if not, I wouldn't. So in that sense, browser-based JavaScript is "scripting" because even if engines like V8 compile it on-the-fly, the source is still delivered to the runtime environment. Similarly shells scripts. A traditional C program's source isn't delivered to th...
Reverse colormap in matplotlib
...
As a LinearSegmentedColormaps is based on a dictionary of red, green and blue, it's necessary to reverse each item:
import matplotlib.pyplot as plt
import matplotlib as mpl
def reverse_colourmap(cmap, name = 'my_cmap_r'):
"""
In:
cmap, name
...
Why do some functions have underscores “__” before and after the function name?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
jQuery: Count number of list elements?
...
gsamaras
64.5k3131 gold badges140140 silver badges240240 bronze badges
answered Mar 3 '09 at 11:12
cletuscletu...
Backbone View: Inherit and extend events from parent
...
Wouldn't it be easier to create specialized base constructor from Backbone.View that handles the inheritance of events up the hierarchy.
BaseView = Backbone.View.extend {
# your prototype defaults
},
{
# redefine the 'extend' function as decorated function of ...