NSDateFormatter format strings for Twitter and Facebook

Format strings for processing dates from facebook or twitter’s json api’s

//2010-09-12T22:21:18+0000
#define DF_FACEBOOK @"yyyy-MM-dd'T'HH:mm:ssZZ"
// Sun Sep 12 17:06:56 +0000 2010
#define DF_TWITTER @"EEE LLL dd HH:mm:ss ZZ yyyy"

Usage:

NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setTimeStyle:NSDateFormatterFullStyle]; // important
[df setDateFormat:DF_TWITTER];
NSDate *date = [df dateFromString:dateStringTwitter];
[df release];

Where DF_TWITTER would be DF_FACEBOOK, if you were processing facebook json instead of Twitter.