...ference is that, rather than visiting every disk page, a bitmap index scan ANDs and ORs applicable indexes together, and only visits the disk pages that it needs to. This is different from an index scan, where the index is visited row by row in order -- meaning a disk page may get visited multiple ...

... One solution is to implement an OnScrollListener and make changes (like adding items, etc.) to the ListAdapter at a convenient state in its onScroll method. The following ListActivity shows a list of integers, starting with 40, adding items when the user scrolls to the end...

... Update: Before continuing everyone should read and understand the html5rocks tutorial on CORS. It is easy to understand and very clear. If you control the server being POSTed, simply leverage the "Cross-Origin Resource Sharing standard" by setting response headers on the...

I have two files: file1 and file2 . How do I append the contents of file2 to file1 so that contents of file1 persist the process? ...

...ncredible complexity, you should be able to ask relatively basic questions and find out if they are really that good based on their answers. For instance, my standard first question to gauge the rest of the interview is: In JavaScript, what is the difference between var x = 1 and x = 1? Answer...

... You can't initialize a and b in B because they are not members of B. They are members of A, therefore only A can initialize them. You can make them public, then do assignment in B, but that is not a recommended option since it would destroy encapsu...

lsof is an increadibly powerful command-line utility for unix systems. It lists open files, displaying information about them. And since most everything is a file on unix systems, lsof can give sysadmins a ton of useful diagnostic data. ...

...sily-readable loops. If the body of your loop spans several screen lengths and has multiple nested sub-blocks, yes, you could easily forget that some code won't be executed after the break. If, however, the loop is short and to the point, the purpose of the break statement should be obvious. If a l...

...recommend sticking to the ternary operator as other developers will understand that much more quickly without having to investigate the or method Note: I started a module to add common helpers like this or on Optional to swift. ...

...SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst ...