大约有 46,000 项符合查询结果（耗时：0.0486秒） [XML]
mysqli or PDO - what are the pros and cons? [closed]
In our place we're split between using mysqli and PDO for stuff like prepared statements and transaction support. Some projects use one, some the other. There is little realistic likelihood of us ever moving to another RDBMS.
...
lexers vs parsers
...input.
Hint: The alphabet doesn't necessarily have to be of letters. But it
has to be of symbols which are atomic for the language
understood by parser/lexer.
Symbols for the lexer: ASCII characters.
Symbols for the parser: the particular tokens, which are terminal symbols of their grammar.
They ...
What it the significance of the Javascript constructor property?
...r, the significance of the constructor property, as I can't seem to make it have any effect. E.g.:
6 Answers
...
What exactly are unmanaged resources?
...nmanaged resources correctly, the garbage collector will eventually handle it for you when the object containing that resource is garbage collected (this is "finalization"). But because the garbage collector doesn't know about the unmanaged resources, it can't tell how badly it needs to release them...
What is polymorphism, what is it for, and how is it used?
What is polymorphism, what is it for, and how is it used?
28 Answers
28
...
How do you use the ? : (conditional) operator in JavaScript?
Can someone please explain to me in simple words what is the ?: (conditional, "ternary") operator and how to use it?
18 ...
What does Maven do, in theory and in practice? When is it worth to use it? [closed]
... for practice. I've read about Maven, but I don't actually understand when it is meant to be used.
3 Answers
...
Why is exception handling bad?
...
Exceptions make it really easy to write code where an exception being thrown will break invariants and leave objects in an inconsistent state. They essentially force you to remember that most every statement you make can potentially throw, ...
What is the HMVC pattern?
...documentation, I found out that the main difference in 3.0 version is that it follows the HMVC pattern instead of MVC as version 2.x does. The page about this in Kohana's docs and the one on wikipedia didn't really give me a clear idea.
...
Why does the is operator return false when given null?
It seems to me that the is operator is a bit inconsistent.
7 Answers
7
...