Another little eero ReactiveCocoa example. This one is from one of the official examples from GitHub.

tiny_reactive_before_after.txt

// Only log names that start with "j".

// Objective-C version...

[[RACAble(self.username)
   filter:^(NSString *newName) {
       return [newName hasPrefix:@"j"];
   }]
   subscribeNext:^(NSString *newName) {
       NSLog(@"%@", newName);
   }];


// Eero version...

RACAble(self.username).filter: (String newName | return newName.hasPrefix:'j'),
                subscribeNext: (String newName | Log('%@', newName))


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