大约有 30,000 项符合查询结果（耗时：0.0264秒） [XML]
Profiling Django
...lbar. It will show you what queries are executed on each page and how much time they take. It's a really useful, powerful and easy to use tool.
Also, read recommendations about Django performance in Database access optimization from the documentation.
And Django performance tips by
Jacob Kaplan-M...
Django: Why do some model fields clash with each other?
...actly the same values
for the attributes (including
related_name) each time.
More info here.
share
|
improve this answer
|
follow
|
...
Why check both isset() and !empty()
...ed" is very easy to overlook. I had to scan the documentation myself a few times to spot it to post it here.
– deceze♦
Dec 30 '10 at 4:29
2
...
Casting to string in JavaScript
...
@JustusRomijn: True indeed. In the meantime, I started to use the Option type to handle such errors.
– Sammy S.
Apr 28 '14 at 8:29
...
How to create custom easing function with Core Animation?
...KeyframeAnimation+Parametric.h:
// this should be a function that takes a time value between
// 0.0 and 1.0 (where 0.0 is the beginning of the animation
// and 1.0 is the end) and returns a scale factor where 0.0
// would produce the starting value and 1.0 would produce the
// ending value
typ...
What is %2C in a URL?
...ill decode and return the symbol (or symbols).
Hope this saves you some time.
share
|
improve this answer
|
follow
|
...
Why do we need tuples in Python (or any immutable data type)?
... are also immutable in Java, developed quite separately but about the same time as Python, and just about everything is immutable in truly-functional languages.
in Python in particular, only immutables can be hashable (and, therefore, members of sets, or keys in dictionaries). Again, this afford opt...
How do you add a Dictionary of items into another Dictionary
...meter '(key: _, value: _)' does not support destructuring (at least at the time of this writing). One would need to restructure the closure according to [this stackoverflow answer] (stackoverflow.com/questions/44945967/…):
– JonnyB
Dec 4 '17 at 22:11
...
Remove all values within one list from another list? [duplicate]
...hension(a, b):
return [x for x in a if x not in b]
5 tries, average time 12.8 sec
def filter_function(a, b):
return filter(lambda x: x not in b, a)
5 tries, average time 12.6 sec
def modification(a,b):
for x in b:
try:
a.remove(x)
except ValueError:
...
Relational Database Design Patterns? [closed]
...ign Patterns." The first 2 show sample data models which was common in the time frame the books were written. Volume 3 though actually has multiple design patterns for a given problem scenario. E.g., chapter 4 covers hierarchies/aggregations/peer-to-peer scenarios, and then offers multiple designs t...