大约有 46,000 项符合查询结果（耗时：0.0501秒） [XML]
How to implement a unique index on two columns in rails
...rançoisBeausoleil %w(user_id content_id) in ruby just creates an array of strings, it's not special to rails. You can do the same with "user_id content_id".split which is still creating an array of strings. I am sure you know this, this comment is just so other readers don't relate this to rails in...
write a shell script to ssh to a remote machine and execute commands
...andard output and standard error as each host completes
-x args: Passes extra SSH command-line arguments
-o option: Can be used to give options in the format used in the configuration file.(/etc/ssh/ssh_config) (~/.ssh/config)
-p parallelism: Use the given number as the maximum number of con...
How should I use try-with-resources with JDBC?
...r to a separate method:
public List<User> getUser(int userId) {
String sql = "SELECT id, username FROM users WHERE id = ?";
List<User> users = new ArrayList<>();
try (Connection con = DriverManager.getConnection(myConnectionURL);
PreparedStatement ps = con.pre...
How can I prevent the scrollbar overlaying content in IE10?
...nt is inactive. Scrollbars do not overlay content, and therefore
take up extra layout space along the edges of the element where they
appear.
share
|
improve this answer
|
...
Wildcards in jQuery selectors
...t;
<div id="jander2"></div>
This will select the given string anywhere in the id.
share
|
improve this answer
|
follow
|
...
A regular expression to exclude a word/string
...e.aspx?id=$1&$3 Will this rule work correctly and propagate the query string too? So if someone visits mydomain.com/hello?abc=123 I'd like it to rewrite to mydomain.com/Profile.aspx?id=hello&abc=123 I'm also a bit unsure about the performance of (.+) at the end to capture the querystring i...
Git push branch from one remote to another?
...
Due to the extra HEAD branch being created in the previous answer, the cleanest way I found to do this is to clone into a bare repository and then push all branches to the remote as follows:
git clone --bare <from-repository>
cd ...
When is del useful in python?
...
One place I've found del useful is cleaning up extraneous variables in for loops:
for x in some_list:
do(x)
del x
Now you can be sure that x will be undefined if you use it outside the for loop.
...
What does the @ symbol represent in objective-c?
...@ symbol. It is used in different scenarios, for example at the start of a string or to synthesise accessor methods.
4 Ans...
When is layoutSubviews called?
...gs correctly caused the animation to occur and my method to be called.
An extra problem in debugging this is that the simulator quits the app when the in-call status is toggled via the menu. Quit app = no debugger.
share
...