大约有 41,727 项符合查询结果（耗时：0.0377秒） [XML]
What does the 'b' character do in front of a string literal?
Apparently, the following is the valid syntax:
8 Answers
8
...
Extracting bits with a single multiplication
I saw an interesting technique used in an answer to another question , and would like to understand it a little better.
...
How to remove a key from a Python dictionary?
When deleting a key from a dictionary, I use:
13 Answers
13
...
Why is SELECT * considered harmful?
Why is SELECT * bad practice? Wouldn't it mean less code to change if you added a new column you wanted?
15 Answers
...
What are the differences between a clustered and a non-clustered index?
What are the differences between a clustered and a non-clustered index ?
12 Answers
...
What's the difference between a catalog and a schema in a relational database?
I used to think schema were the "upper wrapper" object before the database itself.
I mean DB.schema.<what_ever_object_name_under_schema> .
...
Why are exclamation marks used in Ruby methods?
In Ruby some methods have a question mark ( ? ) that ask a question like include? that ask if the object in question is included, this then returns a true/false.
...
What is the 'new' keyword in JavaScript?
The new keyword in JavaScript can be quite confusing when it is first encountered, as people tend to think that JavaScript is not an object-oriented programming language.
...
How to analyze a java thread dump?
I am trying to understand more about java, especially about memory management and threads.
For this reason I have recently found interest in looking at thread dumps.
...
Difference between signed / unsigned char [duplicate]
So I know that the difference between a signed int and unsigned int is that a bit is used to signify if the number if positive or negative, but how does this apply to a char ? How can a character be positive or negative?
...