One Quickie

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Scrolling to the end of a textview (NSTextView->General)

    NSRange range;
    range = NSMakeRange ([[textView string] length], 0);

    [textView scrollRangeToVisible: range];

I've heard that scrollRangeToVisible is O(N) for the length of the text. So be on the lookout if you have lots of text involved.