大约有 43,000 项符合查询结果（耗时：0.0569秒） [XML]
How to overcome TypeError: unhashable type: 'list'
...you're done
with open('filename.txt', 'rb') as f:
d = {}
# Here we use readlines() to split the file into a list where each element is a line
for line in f.readlines():
# Now we split the file on `x`, since the part before the x will be
# the key and the part after the value
line =...
Is a Java string really immutable?
...
As this topic seems overwhelmingly popular, here's some suggested further reading: Heinz Kabutz's Reflection Madness talk from JavaZone 2009, which covers a lot of the issues in the OP, along with other reflection... well... madness.
It covers why this is sometimes useful. And why, most of the ti...
Upgrade python in a virtualenv
...ne and upgrading your virtualenv package is not an option, you may want to read this in order to install a virtualenv with the python version you want.
EDIT
I've tested this approach (the one that create a new virtualenv on top of the old one) and it worked fine for me. I think you may have some p...
Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]
...t exactly answer the question. This is one of the best answers I have ever read!
– Jim Mitchener
Feb 13 '19 at 7:55
...
Java 8 Streams - collect vs reduce
...
@Jimhooker2002 reread it. If you are, say, calculating the product then the reduction function can simply be applied to the split streams in parallel and then combined together at the end. The process of reducing always results in the the typ...
How to fully clean bin and obj folders within Visual Studio?
...
As others have responded already Clean will remove all artifacts that are generated by the build. But it will leave behind everything else.
If you have some customizations in your MSBuild project this could spell trouble and leave behind stuff you wo...
Debug.Assert vs Exception Throwing
I've read plenty of articles (and a couple of other similar questions that were posted on StackOverflow) about how and when to use assertions, and I understood them well. But still, I don't understand what kind of motivation should drive me to use Debug.Assert instead of throwing a plain excep...
100% width Twitter Bootstrap 3 template
... start writing <div class="row"> without container class and you are ready to go with 100% width layout.
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Basic 100% width Structure</title>
<meta name="viewport" content="width=device-width, initial-sc...
Explain which gitignore rule is ignoring my file
... back in 2009 this feature was requested and partially implemented. After reading the thread, I realised it would not be too much work to do it properly, so I have started work on a patch and hope to have it finished in the next day or two. I will update this answer when it is ready.
UPDATE: Wow,...
Understanding reference counting with Cocoa and Objective-C
...e. From a plumbing perspective, when autorelease is called, the current thread's NSAutoreleasePool is alerted of the call. The NSAutoreleasePool now knows that once it gets an opportunity (after the current iteration of the event loop), it can call release on the object. From our perspective as p...