大约有 45,000 项符合查询结果（耗时：0.0502秒） [XML]
Bash script processing limited number of commands in parallel
...
Great to use for small containers, as no extra packages/dependencies are needed!
– Marco Roy
Sep 5 '19 at 0:36
1
...
List directory tree structure in python?
...ct print a visual tree structure"""
dir_path = Path(dir_path) # accept string coerceable to Path
files = 0
directories = 0
def inner(dir_path: Path, prefix: str='', level=-1):
nonlocal files, directories
if not level:
return # 0, stop iterating
if...
The server principal is not able to access the database under the current security context in SQL Se
...figured out I just had a stupid typo in the Database Name in my connection string connecting to Azure SQL Database. If your Database Name is correct, you don't need access to Master. If it's wrong, then (in my case) I think Entity Framework (6.1.3) is trying to be extra smart by connecting to Master...
What is the reason not to use select *?
...ng all the columns now, it doesn't mean someone else isn't going to add an extra column to the table.
It also adds overhead to the plan execution caching since it has to fetch the meta data about the table to know what columns are in *.
...
What are the differences in die() and exit() in PHP?
... have two exit functions now! Let's make it so that they both
can take a string or integer as an argument and make them identical!"
The end result is that this didn't really make things any "easier",
just more confusing. C and Perl coders will continue to use exit() to
toss an integer exi...
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
...ept over if/else if that results in
speed-ups (for example by preventing extra lookups)
cleaner code (fewer lines/easier to read)
Often, these go hand-in-hand.
speed-ups
In the case of trying to find an element in a long list by:
try:
x = my_list[index]
except IndexError:
x = 'NO_AB...
Unique BooleanField value in Django?
..., self).save(*args, **kwargs)
@Ellis Percival: Hits the database only one extra time and accepts the current entry as the chosen one. Clean and elegant.
from django.db import transaction
class Character(models.Model):
name = models.CharField(max_length=255)
is_the_chosen_one = models.Bool...
How to read a (static) file from inside a Python package?
...emp_file')) # Do not use os.path.join()
template = pkg_resources.resource_string(resource_package, resource_path)
# or for a file-like stream:
template = pkg_resources.resource_stream(resource_package, resource_path)
Tips:
This will read data even if your distribution is zipped, so you may set ...
How to lose margin/padding in UITextView?
...l cases dynamically changing heights, Apple does a bizarre thing: they add extra space at the bottom.
No, really! This would have to be one of the most infuriating things in iOS.
If you encounter the problem, here is a "quick fix" which usually helps:
...
textContainerInset = UIEdgeInsets.ze...
'uint32_t' identifier not found error
...
u_int32_t and uint32_t are not the same type; one has an extra underscore after the u. That seems like a separate problem.
– templatetypedef
Mar 2 '11 at 2:59
...