大约有 47,000 项符合查询结果（耗时：0.0541秒） [XML]
Does ruby have real multithreading?
I know about the "cooperative" threading of ruby using green threads . How can I create real "OS-level" threads in my application in order to make use of multiple cpu cores for processing?
...
How to check if a string is a valid hex color representation?
For example:
7 Answers
7
...
Trees in Twitter Bootstrap [closed]
I have been trying to work on creating a tree (like a directory tree) that uses as much CSS and as little JS as possible (only for states, etc), and I want to know if there are some good existing tree plugins for bootstrap or jquery-ui bootstrap .
...
Regular expression to match URLs in Java
I use RegexBuddy while working with regular expressions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false :
...
CSS Background Opacity [duplicate]
I am using something similar to the following code:
8 Answers
8
...
How do you know what to test when writing unit tests? [closed]
Using C#, I need a class called User that has a username, password, active flag, first name, last name, full name, etc.
...
For i = 0, why is (i += i++) equal to 0?
Take the following code (usable as a Console Application):
24 Answers
24
...
When should I use Lazy?
I found this article about Lazy : Laziness in C# 4.0 – Lazy
7 Answers
7
...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
I have an R data frame containing a factor that I want to "expand" so that for each factor level, there is an associated column in a new data frame, which contains a 1/0 indicator. E.g., suppose I have:
...
Difference between map, applymap and apply methods in Pandas
Can you tell me when to use these vectorization methods with basic examples?
10 Answers
...