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Postgres and Indexes on Foreign Keys and Primary Keys
...ndexes on primary keys and unique constraints, but not on the referencing side of foreign key relationships.
When Pg creates an implicit index it will emit a NOTICE-level message that you can see in psql and/or the system logs, so you can see when it happens. Automatically created indexes are visi...
Add line break to ::after or ::before pseudo-element content
...XX \A Mobile: YYYYY ";
white-space: pre; /* or pre-wrap */
}
http://jsfiddle.net/XkNxs/
When escaping arbitrary strings, however, it's advisable to use \00000a instead of \A, because any number or [a-f] character followed by the new line may give unpredictable results:
function addTextToStyle(...
JAX-RS — How to return JSON and HTTP status code together?
...
Here's an example:
@GET
@Path("retrieve/{uuid}")
public Response retrieveSomething(@PathParam("uuid") String uuid) {
if(uuid == null || uuid.trim().length() == 0) {
return Response.serverError().entity("UUID cannot be blank").build();
}
Entity enti...
How do I embed a single file from a GitHub gist with the new gist interface?
...
Take the gist URL from the left-hand side and after the .js add a query string like ?file=myFile.blah, e.g.
<script src="https://gist.github.com/4505639.js?file=macroBuild.scala" type="text/javascript"></script>
...
How to check a radio button with jQuery?
...
Please, elaborate. General idea is to check a radio button addressing it with its attributes - name and optionally, value. I'm not sure what are you trying to accomplish with this, since there are only name attribute and :checked pseudo selector used. ...
How to remove css property in jQuery
...olution here that satisfies the OP. Most of the solutions suggest getting rid of the entire style attribute which is not worth it.
I used jQuery's prop method.
var styleObject = $('my-selector').prop('style');
styleObject.removeProperty('background-color');
...
Put icon inside input element in a form
How do I put an icon inside a form's input element?
16 Answers
16
...
Scroll to bottom of div?
...
Here's what I use on my site:
var objDiv = document.getElementById("your_div");
objDiv.scrollTop = objDiv.scrollHeight;
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c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...均提供实例参考。窗口应用程序使用Timer：
#define TIMER_ID 1000 //定时器ID，可任意。触发后回调函数中用于区别不同的定时器以执行不同的任务
SetTimer(TIMER_ID, 1000 , NULL); //启动定时器，1秒后触发
KillTimer(TIMER_ID); //取消定时器
...
passing xxx as \'this\' argument of xxx discards qualifiers - C/C++ - 清泛网 - 专注C/C++及内核技术
...lude <set>
using namespace std;
class StudentT {
public:
int id;
string name;
public:
StudentT(int _id, string _name) : id(_id), name(_name) {
}
int getId() { // 应该声明为const成员
return id;
}
string getName() { // 应该声明为con...