大约有 42,000 项符合查询结果（耗时：0.0546秒） [XML]
Difference between \w and \b regular expression meta characters
Can anyone explain the difference between \b and \w regular expression metacharacters? It is my understanding that both these metacharacters are used for word boundaries. Apart from this, which meta character is efficient for multilingual content?
...
Behaviour of final static method
I have been playing around with modifiers with static method and came across a weird behaviour.
7 Answers
...
What is a C++ delegate?
What is the general idea of a delegate in C++? What are they, how are they used and what are they used for?
6 Answers
...
In-place type conversion of a NumPy array
Given a NumPy array of int32 , how do I convert it to float32 in place ? So basically, I would like to do
6 Answers
...
Which is the fastest algorithm to find prime numbers?
Which is the fastest algorithm to find out prime numbers using C++? I have used sieve's algorithm but I still want it to be faster!
...
What is the difference between an ordered and a sorted collection?
Is there any difference between a sorted and an ordered collection?
8 Answers
8
...
MySQL indexes - what are the best practices?
I've been using indexes on my MySQL databases for a while now but never properly learnt about them. Generally I put an index on any fields that I will be searching or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
...
The Use of Multiple JFrames: Good or Bad Practice? [closed]
I'm developing an application which displays images, and plays sounds from a database. I'm trying to decide whether or not to use a separate JFrame to add images to the database from the GUI.
...
Always pass weak reference of self into block in ARC?
I am a little confused about block usage in Objective-C. I currently use ARC and I have quite a lot of blocks in my app, currently always referring to self instead of its weak reference. May that be the cause of these blocks retaining self and keeping it from being dealloced ? The question is, s...
What's the best manner of implementing a social activity stream? [closed]
I'm interested in hearing your opinions in which is the best way of implementing a social activity stream (Facebook is the most famous example). Problems/challenges involved are:
...