大约有 38,000 项符合查询结果（耗时：0.0365秒） [XML]
What is the difference between SAX and DOM?
... such information yourself (through a state machine or otherwise). All the more reason to use a DOM parser (if resources allow) :-) .
– sparkymat
Jul 26 '11 at 10:51
...
What are dictionary view objects?
...ct changes
>>> del dishes['eggs']
>>> keys # No eggs anymore!
dict_keys(['sausage', 'bacon', 'spam'])
>>> values # No eggs value (2) anymore!
dict_values([1, 1, 500])
(The Python 2 equivalent uses dishes.viewkeys() and dishes.viewvalues().)
This example shows the dy...
How do I make a textbox that only accepts numbers?
...the specification. I've looked at the MaskedTextBox control but I'd like a more general solution that could work with perhaps a regular expression, or depend on the values of other controls.
...
Why do x86-64 systems have only a 48 bit virtual address space?
...f 256 terabyte. That's a lot. You're not going to see a system which needs more than that any time soon.
So CPU manufacturers took a shortcut. They use an instruction set which allows a full 64-bit address space, but current CPUs just only use the lower 48 bits. The alternative was wasting transist...
What character to use to put an item at the end of an alphabetic list?
...04 - Nautilus
The hashtag # is the last character. But if you want some more compatibility with other file managers I would use ZZ.
Something more elegant than "z_item"?
I guess this depends on your own concept of elegance and I think StackOverflow should diffuse best and safest practices, not ...
Managing relationships in Laravel, adhering to the repository pattern
...en end up with a repository per table, but some repositories are used much more than others, and so have many more methods. Your "courses" repository may be much more full-featured than your Assignments repository, for instance, if your application centers more around Courses and less about a Course...
MySQL query to get column names?
...it's standard SQL (Whereas SHOW ... is a MySQL specific extension)...
For more information about the difference between SHOW... and using the INFORMATION_SCHEMA tables, check out the MySQL Documentation on INFORMATION_SCHEMA in general...
...
Casting vs using the 'as' keyword in the CLR
... right solution. That throws an exception immediately, which means that no more work is done under incorrect assumptions, and the exception correctly shows the type of bug.
// This will throw an exception if randomObject is non-null and
// refers to an object of an incompatible type. The cast is
//...
?? Coalesce for empty string?
Something I find myself doing more and more is checking a string for empty (as in "" or null) and a conditional operator.
...
Restore the state of std::cout after manipulating it
...
There's more to the stream state besides the flags.
– jww
Mar 18 '17 at 11:58
3
...