大约有 31,100 项符合查询结果（耗时：0.0368秒） [XML]
Preferred method to store PHP arrays (json_encode vs serialize)
...I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
...
How to test multiple variables against a value?
...r the set version. Tuple's are very cheap to create and iterate over. On my machine at least, tuples are faster than sets so long as the size of the tuple is around 4-8 elements. If you have to scan more than that, use a set, but if you are looking for an item out of 2-4 possibilities, a tuple is...
How do I move files in node.js?
... For those wondering where @seppo0010's comment went: it was on my answer, which I deleted and posted as a comment on the OP.
– Matt Ball
Dec 20 '11 at 18:46
6
...
RESTfully design /login or /register resources?
I was designing a web app and then stopped to think about how my api should be designed as a RESTful web service. For now, most of my URI's are generic and might apply to various web apps:
...
Age from birthdate in python
...their birthday in the local time (that's what I do, I live 10-12h ahead of my birth place time). If "born" was a timezone-aware datetime, you could use pytz's arithmetic and normalize() - maybe of interest for an astrology software?
– Danny W. Adair
Dec 13 '15 ...
System.currentTimeMillis vs System.nanoTime
...ould use System.currentTimeMillis() or System.nanoTime() when updating my object's positions in my game? Their change in movement is directly proportional to the elapsed time since the last call and I want to be as precise as possible.
...
Detect blocked popup in Chrome
... I think I found a way to make this work for new versions of Chrome. See my answer for details.
– InvisibleBacon
Nov 8 '10 at 16:50
2
...
Label encoding across multiple columns in scikit-learn
...'d rather just have one big LabelEncoder objects that works across all my columns of data.
21 Answers
...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ve really a lot of mutexes? Or can I just throw as much mutex variables in my code as I have int variables and it doesn't really matter?
You can throw as much mutex variables into your code as you wish. You are only limited by the amount of memory you application can allocate.
Summary. User-space...
Using semicolon (;) vs plus (+) with exec in find
...
ls testdir1; ls testdir2
vs
ls testdir1 testdir2
Doing the above in my shell mirrored the output in your question.
example of when you would want to use \+
Suppose two files, 1.tmp and 2.tmp:
1.tmp:
1
2
3
2.tmp:
0
2
3
With \;:
find *.tmp -exec diff {} \;
> diff: missing operand ...