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Exposing database IDs - security risk?
I've heard that exposing database IDs (in URLs, for example) is a security risk, but I'm having trouble understanding why.
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Calendar Recurring/Repeating Events - Best Storage Method
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Storing "Simple" Repeating Patterns
For my PHP/MySQL based calendar, I wanted to store repeating/recurring event information as efficiently as possibly. I didn't want to have a large number of rows, and I wanted to easily lookup all events that would take place...
jQuery - Add ID instead of Class
...nges... also, you keep overriding the same IDs, so you might as well do it for $('#nav, #container, .stretch_footer, #footer').attr('id', $('span .breadcrumb:first').text()) (or last, for .stretch_footer). Anyway, this is weird.
– Kobi
Feb 3 '10 at 5:44
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Postgres unique constraint vs index
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DETAIL: Key (ind_id)=(0) already exists.
test=#
It works as expected!
Foreign keys
Now we'll define detail table with two foreign keys referencing to our two columns in master.
create table detail (
con_id integer,
ind_id integer,
constraint detail_fk1 foreign key (con_id) referen...
How to implement the activity stream in a social network
...ound on the web examples of implementation the stream of users' actions... For example, how to filter actions for each users? How to store the action events? Which data model and object model can I use for the actions stream and for the actions itselves?
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Rails :include vs. :joins
...y was changed with Rails 2.1. Rails used to do the join in all cases, but for performance reasons it was changed to use multiple queries in some circumstances. This blog post by Fabio Akita has some good information on the change (see the section entitled "Optimized Eager Loading").
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VC MFC工具栏(CToolBar)控件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...(50,38,ILC_COLOR24|ILC_MASK,1,1);//图片大小必须一致
CBitmap bmp;
for(int i=0;i<6;i++)
{
bmp.LoadBitmap(IDB_BITMAP1+i);
m_ImageList.Add(&bmp,RGB(255,255,255));
bmp.DeleteObject();
}
UINT nArray[6];
for(i=0;i<6;i++)
{
nArray[i]=ID_BUTTON1+i;
}
m_Toolbar.CreateEx(this);//创建工...
Android OnClickListener - identify a button
...ough, I don't recommend doing it that way since you will have to add an if for each button you use. That's hard to maintain.
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Query EC2 tags from within instance
...ol (to retrieve your instance ID) and the new Tag API to retrieve the tags for the current instance.
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What is the meaning of id?
... to any type, but unlike void * it always points to an Objective-C object. For example, you can add anything of type id to an NSArray, but those objects must respond to retain and release.
The compiler is totally happy for you to implicitly cast any object to id, and for you to cast id to any objec...