大约有 40,000 项符合查询结果（耗时：0.0869秒） [XML]
How often does python flush to a file?
...written from the buffer to the file). You can explicitly flush the buffer by calling the flush() method on a file handle.
– Corey Goldberg
Mar 5 '19 at 4:59
3
...
Is there a regular expression to detect a valid regular expression?
... # end of string
/
This is a recursive regex, and is not supported by many regex engines. PCRE based ones should support it.
Without whitespace and comments:
/^((?:(?:[^?+*{}()[\]\\|]+|\\.|\[(?:\^?\\.|\^[^\\]|[^\\^])(?:[^\]\\]+|\\.)*\]|\((?:\?[:=!]|\?<[=!]|\?>)?(?1)??\)|\(\?(?:R|[+-]...
How to get line count of a large file cheaply in Python?
...
You can approximate a line count by sampling. It can be thousands of times faster. See: documentroot.com/2011/02/…
– Erik Aronesty
Jun 14 '16 at 20:30
...
WPF TextBox won't fill in StackPanel
...
I've had the same problem with StackPanel, and the behavior is "by design". StackPanel is meant for "stacking" things even outside the visible region, so it won't allow you to fill remaining space in the stacking dimension.
You can use a DockPanel with LastChildFill set to true and dock...
Using semicolon (;) vs plus (+) with exec in find
...e command:
ls file1 file2 file3
The number of filenames is only limited by the system's maximum command line length. If the command exceeds this length, the command will be called multiple times.
share
|
...
How/When does Execute Shell mark a build as failure in Jenkins?
...id:
If you have a shell script that does "checkout, build, deploy" all by itself, then why are you using Jenkins? You are foregoing all the features of Jenkins that make it what it is. You might as well have a cron or an SVN post-commit hook call the script directly. Jenkins performing the SVN c...
Python name mangling
... def push(self, value):
self.__storage.append(value)
write this by default:
class Stack(object):
def __init__(self):
self.storage = [] # No mangling
def push(self, value):
self.storage.append(value)
This is for sure a controversial way of doing things. Python ...
Private vs Public in Cache-Control
...aching web pages to reduce the amount of bandwidth needed and lower costs. By using cache-control:private, you are specifying that it shouldn't cache the page (but allowing the final user to do so). If you use cache-control: public, you are saying that it's okay for everyone to cache the page, and s...
Persistent invalid graphics state error when using ggplot2
...
I ran into this same error and solved it by running:
dev.off()
and then running the plot again. I think the graphics device was messed up earlier somehow by exporting some graphics and it didn't get reset. This worked for me and it's simpler than reinstalling gg...
Best practice for nested fragments in Android 4.0, 4.1 (
...
The only way I could see this working is by using a CustomLayoutInflater, as you come across the fragment element, you would override the super implementation and try to parse/inflate it yourself. But that will be ALOT of effort, Well out of scope of a StackOverflow...