大约有 13,071 项符合查询结果（耗时：0.0263秒） [XML]
Is SQL or even TSQL Turing Complete?
This came up at the office today. I have no plans of doing such a thing, but theoretically could you write a compiler in SQL? At first glance it appears to me to be turing complete, though extremely cumbersome for many classes of problems.
...
How do I reflect over the members of dynamic object?
I need to get a dictionary of properties and their values from an object declared with the dynamic keyword in .NET 4? It seems using reflection for this will not work.
...
C char array initialization
I'm not sure what will be in the char array after initialization in the following ways.
6 Answers
...
What does 'require: false' in Gemfile mean?
...
This means install the gem, but do not call require when you start Bundler. So you will need to manually call
require "whenever"
if you want to use the library.
If you were to do
gem "whenever", require: "whereever"
then bundler would download the...
nginx upload client_max_body_size issue
I'm running nginx/ruby-on-rails and I have a simple multipart form to upload files.
Everything works fine until I decide to restrict the maximum size of files I want uploaded.
To do that, I set the nginx client_max_body_size to 1m (1MB) and expect a HTTP 413 (Request Entity Too Large) status in...
What is the difference between Modal and Push segue in Storyboards?
...n someone explain to me what is the exact difference between modal and push segue?
4 Answers
...
How do I install a custom font on an HTML site
I am not using flash or php - and I have been asked to add a custom font to a simple HTML layout. "KG June Bug"
6 Answers
...
What kind of virtual machine is BEAM (the Erlang VM)?
From what I understand a virtual machine falls into two categories either "system virtual machine" or a "process virtual machine". It's kind of fuzzy to me where BEAM lies. Is there another kind of virtual machine I am not aware of?
...
What does new self(); mean in PHP?
...
self points to the class in which it is written.
So, if your getInstance method is in a class name MyClass, the following line :
self::$_instance = new self();
Will do the same as :
self::$_instance = new MyClass();
Edit : a couple more informations, after the comments.
I...
ruby on rails f.select options with custom attributes
...
Rails CAN add custom attributes to select options, using the existing options_for_select helper. You almost had it right in the code in your question. Using html5 data-attributes:
<%= f.select :country_id, options_for_select(
@count...