storage

I am creating an app using the Bespin editor and HTML5's localStorage. It stores all files locally and helps with grammar, uses JSLint and some other parsers for CSS and HTML to aid the user. I want to calculate how much of the localStorage limit has been used and how much there actually is. Is this possible today? I was thinking for not to simply calculate the bits that are stored. But then again I'm not sure what more is there that I can't measure myself. You may be able to get an approximate idea by using the JSON methods to turn the whole localStorage object to a JSON string: JSON

Apparently PostgreSQL stores a couple of values in the header of each database row . If I don't use NULL values in that table - is the null bitmap still there? Does defining the columns with NOT NULL make any difference? It's actually more complex than that. The null bitmap needs one bit per column in the row, rounded up to full bytes. It is only there if the actual row includes at least one NULL value and is fully allocated in that case. NOT NULL constraints do not directly affect that. (Of course, if all fields of your table are NOT NULL , there can never be a null bitmap.) The "heap tuple

I want to save a file on internal storage into a specific folder. My code is: File mediaDir = new File("media"); if (!mediaDir.exists()){ mediaDir.createNewFile(); mediaDir.mkdir(); } File f = new File(getLocalPath()); f.createNewFile(); FileOutputStream fos = new FileOutputStream(f); fos.write(data); fos.close(); getLocalPath returns /data/data/myPackage/files/media/qmhUZU.jpg but when I want to create the media folder I'm getting the exception "java.io.IOException: Read-only file system". Any ideas how to write my files on internal phone storage in in folder media? Thanks. You should use

I am developing a mobile web application (for iPhone & Android) with a local database (using html5 webstorage) so my app is still usable when the user is offline. This is working perfectly, but I want to save the local data on a server. So I need to synchronize the local DB with a DB on a server. The synchronisation can only be one way, but in the future, I would like to synchronize it in the both way (server <-> local DB). This requierement looks very common (or will be common in the future for mobile web app), but I can't find a library doing that. I know google is doing that in their mobile

I’m writing an upload function in .NET for presentation images on user profiles. I’m choosing between two different ways of doing it, and would like to ask on advice and opinions as to the pros and cons. Store the images directly on the file system Store the images in the database So far I’ve been mostly pro the first option – naming the images after the usernames, as each user can only have one presentation image. Then I do a check in the designated path if the user has an image, if not display a default “no image”-image. Another thing I like about this is that it saves space in the DB – the