大约有 31,400 项符合查询结果(耗时:0.0493秒) [XML]

https://stackoverflow.com/ques... 

Using JQuery to check if no radio button in a group has been checked

...you could just change it to .val() == "" and remove the ! and you would be all set. – Doug Neiner Jan 15 '10 at 21:08 ...
https://stackoverflow.com/ques... 

How to do a logical OR operation in shell scripting

... @Doug: It's not that unix doesn't use them, it's that bash and all the other shells I know use them for input/output redirection. – Cascabel Nov 6 '10 at 2:28 add ...
https://stackoverflow.com/ques... 

How To Create Table with Identity Column

...TH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ) ON [PRIMARY] share | improve this answer | follow...
https://stackoverflow.com/ques... 

Convert Unix timestamp to a date string

...ecognizes neither -d nor -r and provides no standard way in any command at all (that I know of) to format a Unix time from the command line (since POSIX Awk also lacks strftime()). (You can't use touch -t and ls because the former does not accept a time given as seconds since the Unix Epoch.) Note...
https://stackoverflow.com/ques... 

How to make clang compile to llvm IR

...e correct where file extensions are concerned - and the clang frontend actually does the right thing if .bc is used; also, keep in mind that llvm-ld can act as frontend for the system toolchain, ie my previous answer using llvm-ld -native should work as expected.... – Christoph...
https://stackoverflow.com/ques... 

Symfony 2: How do I check if a user is not logged in inside a template?

...any user is logged in. {% if app.user %} # user is logged in (any and all users, regardless of ROLE_*) {% elseif not app.user %} # user is not logged in (note the `not` in the `elseif` statement) {% endif %} Checking authentication status You can use the is_granted() method to check fo...
https://stackoverflow.com/ques... 

Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12

... the crash you may need to setup a swap space for your micro instance. Actually performance wise is better to enable swap. Steps below show how to make a swap space for your Micro instance. I assume you have AWS Account with a Micro instance running. Run dd if=/dev/zero of=/swapfile bs=1M count=102...
https://stackoverflow.com/ques... 

Maximum on http header values?

Is there an accepted maximum allowed size for HTTP headers? If so, what is it? If not, is this something that's server specific or is the accepted standard to allow headers of any size? ...
https://stackoverflow.com/ques... 

What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?

...fNeeded and layoutSubviews methods? And an example implementation where all three would be used. Thanks. 2 Answers ...
https://stackoverflow.com/ques... 

What is cURL in PHP?

...the PHP manual. In order to use PHP's cURL functions you need to install the » libcurl package. PHP requires that you use libcurl 7.0.2-beta or higher. In PHP 4.2.3, you will need libcurl version 7.9.0 or higher. From PHP 4.3.0, you will need a libcurl version that's 7.9.8 or higher. ...