大约有 47,000 项符合查询结果（耗时：0.0808秒） [XML]
Change an HTML5 input's placeholder color with CSS
...nternet Explorer 9 and lower does not support the placeholder attribute at all, while Opera 12 and lower do not support any CSS selector for placeholders.
The discussion about the best implementation is still going on. Note the pseudo-elements act like real elements in the Shadow DOM. A padding on ...
Adding an identity to an existing column
... data values on the newly created identity column. Note that you will lose all data if 'if not exists' is not satisfied, so make sure you put the condition on the drop as well!
CREATE TABLE dbo.Tmp_Names
(
Id int NOT NULL
IDENTITY(1, 1),
Name varchar(50) NULL
)
ON [...
Spinlock versus Semaphore
...ck (or, the other way around, a lock is a special case of a semaphore). Usually, but not necessarily, spinlocks are only valid within one process whereas semaphores can be used to synchronize between different processes, too.
A lock works for mutual exclusion, that is one thread at a time can acqui...
What is the difference between a symbolic link and a hard link?
... (Or is it multiple inodes? Not sure.)
A file in the file system is basically a link to an inode.
A hard link, then, just creates another file with a link to the same underlying inode.
When you delete a file, it removes one link to the underlying inode. The inode is only deleted (or deletable/ove...
What's the point of NSAssert, actually?
...hat value is what you expect it to be, and if it's not then something is really wrong, and so the app quits. Assert can be very useful for debugging/unit testing, and also when you provide frameworks to stop the users from doing "evil" things.
...
Using sphinx with Markdown instead of RST
...on to choose the parser.) The beauty of this would be instant support for all docutils output formats (but you might not care about that, as similar markdown tools already exist for most). Ways to approach that without developing a parser from scratch:
You could cheat and write a "parser" that us...
How to reset a form using jQuery with .reset() method
...igger('reset'); i have added profile_img_form named class on my form then called it. it does not reset my form and returning error message like Uncaught SyntaxError: Invalid regular expression: /(^|\.)bs\.(?:.*\.|)fileinput(\.|$)/: Kindly suggest what is issue. Thanks.
– Kamle...
How to merge specific files from Git branches
... not stage this hunk nor any of the remaining ones
a - stage this hunk and all later hunks in the file
d - do not stage this hunk nor any of the later hunks in the file
g - select a hunk to go to
/ - search for a hunk matching the given regex
j - leave this hunk undecided, see next undecided hunk
J ...
How does a language expand itself? [closed]
...onality.
In the case of e.g. Windows the operating system exposes the so-called WIN32 API for applications running on Windows. The Qt library uses that API to provide applications using Qt to its own API. You use Qt, Qt uses WIN32, WIN32 uses lower levels of the Windows operating system, and so on ...
Pry: show me the stack
...
Use the pry-stack_explorer plugin, it allows you to move up and down the call-stack (with up and down), display the callstack (with show-stack), and so on:
see here:
Frame number: 0/64
From: /Users/johnmair/ruby/rails_projects/personal_site/app/controllers/pos...